arch/arm: Move the duplicated assembly code to common folder
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
This commit is contained in:
Xiang Xiao
Petro Karashchenko
parent
ebf1093cff
commit
1320e5add4
@ -109,9 +109,9 @@ VPATH += common
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VPATH += $(ARCH_SUBDIR)
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VPATH += $(ARCH_SUBDIR)
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ifeq ($(CONFIG_ARCH_TOOLCHAIN_IAR),y)
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ifeq ($(CONFIG_ARCH_TOOLCHAIN_IAR),y)
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VPATH += $(ARCH_SUBDIR)$(DELIM)iar
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VPATH += common$(DELIM)iar
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else # ifeq ($(CONFIG_ARCH_TOOLCHAIN_GNU),y)
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else # ifeq ($(CONFIG_ARCH_TOOLCHAIN_GNU),y)
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VPATH += $(ARCH_SUBDIR)$(DELIM)gnu
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VPATH += common$(DELIM)gnu
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endif
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endif
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all: $(HEAD_OBJ) $(BIN)
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all: $(HEAD_OBJ) $(BIN)
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@ -1,124 +0,0 @@
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/****************************************************************************
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* arch/arm/src/arm/vfork.S
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include "arm_vfork.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Symbols
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****************************************************************************/
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.file "vfork.S"
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.globl up_vfork
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: vfork
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*
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* Description:
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* The vfork() function has the same effect as fork(), except that the
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* behavior is undefined if the process created by vfork() either modifies
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* any data other than a variable of type pid_t used to store the return
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* value from vfork(), or returns from the function in which vfork() was
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* called, or calls any other function before successfully calling _exit()
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* or one of the exec family of functions.
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*
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* This thin layer implements vfork by simply calling up_vfork() with the
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* vfork() context as an argument. The overall sequence is:
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*
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* 1) User code calls vfork(). vfork() collects context information and
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* transfers control up up_vfork().
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* 2) up_vfork() and calls nxtask_setup_vfork().
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* 3) nxtask_setup_vfork() allocates and configures the child task's TCB.
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* This consists of:
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* - Allocation of the child task's TCB.
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* - Initialization of file descriptors and streams
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* - Configuration of environment variables
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* - Allocate and initialize the stack
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* - Setup the input parameters for the task.
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* - Initialization of the TCB (including call to up_initial_state())
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* 4) up_vfork() provides any additional operating context. up_vfork must:
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* - Initialize special values in any CPU registers that were not
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* already configured by up_initial_state()
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* 5) up_vfork() then calls nxtask_start_vfork()
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* 6) nxtask_start_vfork() then executes the child thread.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* Upon successful completion, vfork() returns 0 to the child process and
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* returns the process ID of the child process to the parent process.
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* Otherwise, -1 is returned to the parent, no child process is created,
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* and errno is set to indicate the error.
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*
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****************************************************************************/
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.globl vfork
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.type vfork, function
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vfork:
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/* Create a stack frame */
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mov r0, sp /* Save the value of the stack on entry */
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sub sp, sp, #VFORK_SIZEOF /* Allocate the structure on the stack */
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/* CPU registers */
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/* Save the volatile registers */
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str r4, [sp, #VFORK_R4_OFFSET]
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str r5, [sp, #VFORK_R5_OFFSET]
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str r6, [sp, #VFORK_R6_OFFSET]
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str r7, [sp, #VFORK_R7_OFFSET]
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str r8, [sp, #VFORK_R8_OFFSET]
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str r9, [sp, #VFORK_R9_OFFSET]
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str r10, [sp, #VFORK_R10_OFFSET]
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/* Save the frame pointer, stack pointer, and return address */
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str fp, [sp, #VFORK_FP_OFFSET]
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str r0, [sp, #VFORK_SP_OFFSET]
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str lr, [sp, #VFORK_LR_OFFSET]
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/* Floating point registers (not yet) */
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/* Then, call up_vfork(), passing it a pointer to the stack structure */
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mov r0, sp
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bl up_vfork
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/* Release the stack data and return the value returned by up_vfork */
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ldr lr, [sp, #VFORK_LR_OFFSET]
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add sp, sp, #VFORK_SIZEOF
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bx lr
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.size vfork, .-vfork
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.end
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@ -1,103 +0,0 @@
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/****************************************************************************
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* arch/arm/srcm/armv6-m/arm_signal_handler.S
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <arch/syscall.h>
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#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__)
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/****************************************************************************
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* File info
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****************************************************************************/
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.file "arm_signal_handler.S"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_signal_handler
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*
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* Description:
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* This function is the user-space, signal handler trampoline function. It
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* is called from up_signal_dispatch() in user-mode.
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*
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* R0-R3, R11 - volatile registers need not be preserved.
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* R4-R10 - static registers must be preserved
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* R12-R14 - LR and SP must be preserved
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*
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* Input Parameters:
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* R0 = sighand
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* The address user-space signal handling function
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* R1-R3 = signo, info, and ucontext
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* Standard arguments to be passed to the signal handling function.
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*
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* Returned Value:
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* None. This function does not return in the normal sense. It returns
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* via the SYS_signal_handler_return (see syscall.h)
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*
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****************************************************************************/
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.text
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.align 2
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.code 16
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.thumb_func
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.globl up_signal_handler
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.type up_signal_handler, function
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up_signal_handler:
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/* Save some register */
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push {r4, r5} /* Save R4 and R5 on the stack */
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mov r5, lr /* Save LR in R5 */
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/* Call the signal handler */
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mov r4, r0 /* R4=sighand */
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mov r0, r1 /* R0=signo */
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mov r1, r2 /* R1=info */
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mov r2, r3 /* R2=ucontext */
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blx r4 /* Call the signal handler */
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/* Restore the registers */
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mov lr, r5 /* Restore LR */
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pop {r4, r5} /* Restore R4 and R5 */
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/* Execute the SYS_signal_handler_return SVCall (will not return) */
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mov r0, #SYS_signal_handler_return
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svc #SYS_syscall
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nop
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.size up_signal_handler, .-up_signal_handler
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.end
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#endif /* CONFIG_BUILD_PROTECTED && !__KERNEL__ */
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@ -1,240 +0,0 @@
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/****************************************************************************
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* arch/arm/src/armv7-a/arm_fetchadd.S
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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.file "arm_fetchadd.S"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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.text
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/****************************************************************************
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* Name: up_fetchadd32
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*
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* Description:
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* Perform an atomic fetch add operation on the provided 32-bit value.
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*
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* This function must be provided via the architecture-specific logic.
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*
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* Input Parameters:
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* addr - The address of 32-bit value to be incremented.
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* value - The 32-bit addend
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*
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* Returned Value:
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* The incremented value (volatile!)
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*
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****************************************************************************/
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.globl up_fetchadd32
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.type up_fetchadd32, %function
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up_fetchadd32:
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1:
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ldrex r2, [r0] /* Fetch the value to be incremented */
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add r2, r2, r1 /* Add the addend */
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strex r3, r2, [r0] /* Attempt to save the result */
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teq r3, #0 /* r3 will be 1 if strex failed */
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bne 1b /* Failed to lock... try again */
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mov r0, r2 /* Return the incremented value */
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bx lr /* Successful! */
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.size up_fetchadd32, . - up_fetchadd32
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/****************************************************************************
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* Name: up_fetchsub32
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*
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* Description:
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* Perform an atomic fetch subtract operation on the provided 32-bit value.
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*
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* This function must be provided via the architecture-specific logic.
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*
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* Input Parameters:
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* addr - The address of 32-bit value to be decremented.
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* value - The 32-bit subtrahend
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*
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* Returned Value:
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* The decremented value (volatile!)
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*
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****************************************************************************/
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.globl up_fetchsub32
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.type up_fetchsub32, %function
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up_fetchsub32:
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1:
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ldrex r2, [r0] /* Fetch the value to be decremented */
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sub r2, r2, r1 /* Subtract the subtrahend */
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strex r3, r2, [r0] /* Attempt to save the result */
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teq r3, #0 /* r3 will be 1 if strex failed */
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bne 1b /* Failed to lock... try again */
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mov r0, r2 /* Return the decremented value */
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bx lr /* Successful! */
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.size up_fetchsub32, . - up_fetchsub32
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/****************************************************************************
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* Name: up_fetchadd16
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*
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* Description:
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* Perform an atomic fetch add operation on the provided 16-bit value.
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*
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* This function must be provided via the architecture-specific logic.
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*
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* Input Parameters:
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* addr - The address of 16-bit value to be incremented.
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* value - The 16-bit addend
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*
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* Returned Value:
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* The incremented value (volatile!)
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*
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****************************************************************************/
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.globl up_fetchadd16
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.type up_fetchadd16, %function
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up_fetchadd16:
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1:
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ldrexh r2, [r0] /* Fetch the value to be incremented */
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add r2, r2, r1 /* Add the addend */
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strexh r3, r2, [r0] /* Attempt to save the result */
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teq r3, #0 /* r3 will be 1 if strexh failed */
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bne 1b /* Failed to lock... try again */
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mov r0, r2 /* Return the incremented value */
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bx lr /* Successful! */
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.size up_fetchadd16, . - up_fetchadd16
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/****************************************************************************
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* Name: up_fetchsub16
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*
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* Description:
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* Perform an atomic fetch subtract operation on the provided 16-bit value.
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*
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* This function must be provided via the architecture-specific logic.
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*
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* Input Parameters:
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* addr - The address of 16-bit value to be decremented.
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* value - The 16-bit subtrahend
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*
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* Returned Value:
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* The decremented value (volatile!)
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*
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****************************************************************************/
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.globl up_fetchsub16
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.type up_fetchsub16, %function
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up_fetchsub16:
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1:
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ldrexh r2, [r0] /* Fetch the value to be decremented */
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sub r2, r2, r1 /* Subtract the subtrahend */
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/* Attempt to save the decremented value */
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|
||||||
|
|
||||||
strexh r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexh failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub16, . - up_fetchsub16
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd8
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 8-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 8-bit value to be incremented.
|
|
||||||
* value - The 8-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd8
|
|
||||||
.type up_fetchadd8, %function
|
|
||||||
|
|
||||||
up_fetchadd8:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strexb r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexb failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd8, . - up_fetchadd8
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub8
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 8-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 8-bit value to be decremented.
|
|
||||||
* value - The 8-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub8
|
|
||||||
.type up_fetchsub8, %function
|
|
||||||
|
|
||||||
up_fetchsub8:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
strexb r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexb failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub8, . - up_fetchsub8
|
|
||||||
.end
|
|
||||||
@ -1,106 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-a/arm_testset.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
#include <arch/spinlock.h>
|
|
||||||
|
|
||||||
.file "arm_testset.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_testset
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Assembly Macros
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Private Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_testset
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic test and set operation on the provided spinlock.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* lock - A reference to the spinlock object.
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The spinlock is always locked upon return. The previous value of the
|
|
||||||
* spinlock variable is returned, either SP_LOCKED if the spinlock was
|
|
||||||
* previously locked (meaning that the test-and-set operation failed to
|
|
||||||
* obtain the lock) or SP_UNLOCKED if the spinlock was previously unlocked
|
|
||||||
* (meaning that we successfully obtained the lock).
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_testset
|
|
||||||
.type up_testset, %function
|
|
||||||
|
|
||||||
up_testset:
|
|
||||||
|
|
||||||
mov r1, #SP_LOCKED
|
|
||||||
|
|
||||||
/* Test if the spinlock is locked or not */
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Test if spinlock is locked or not */
|
|
||||||
cmp r2, r1 /* Already locked? */
|
|
||||||
beq 2f /* If already locked, return SP_LOCKED */
|
|
||||||
|
|
||||||
/* Not locked ... attempt to lock it */
|
|
||||||
|
|
||||||
strexb r2, r1, [r0] /* Attempt to set the locked state */
|
|
||||||
cmp r2, r1 /* r2 will be 1 is strexb failed */
|
|
||||||
beq 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
/* Lock acquired -- return SP_UNLOCKED */
|
|
||||||
|
|
||||||
dmb /* Required before accessing protected resource */
|
|
||||||
mov r0, #SP_UNLOCKED
|
|
||||||
bx lr
|
|
||||||
|
|
||||||
/* Lock not acquired -- return SP_LOCKED */
|
|
||||||
|
|
||||||
2:
|
|
||||||
mov r0, #SP_LOCKED
|
|
||||||
bx lr
|
|
||||||
.size up_testset, . - up_testset
|
|
||||||
.end
|
|
||||||
@ -1,124 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-a/vfork.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
#include "arm_vfork.h"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.file "vfork.S"
|
|
||||||
.globl up_vfork
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: vfork
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* The vfork() function has the same effect as fork(), except that the
|
|
||||||
* behavior is undefined if the process created by vfork() either modifies
|
|
||||||
* any data other than a variable of type pid_t used to store the return
|
|
||||||
* value from vfork(), or returns from the function in which vfork() was
|
|
||||||
* called, or calls any other function before successfully calling _exit()
|
|
||||||
* or one of the exec family of functions.
|
|
||||||
*
|
|
||||||
* This thin layer implements vfork by simply calling up_vfork() with the
|
|
||||||
* vfork() context as an argument. The overall sequence is:
|
|
||||||
*
|
|
||||||
* 1) User code calls vfork(). vfork() collects context information and
|
|
||||||
* transfers control up up_vfork().
|
|
||||||
* 2) up_vfork() and calls nxtask_setup_vfork().
|
|
||||||
* 3) nxtask_setup_vfork() allocates and configures the child task's TCB.
|
|
||||||
* This consists of:
|
|
||||||
* - Allocation of the child task's TCB.
|
|
||||||
* - Initialization of file descriptors and streams
|
|
||||||
* - Configuration of environment variables
|
|
||||||
* - Allocate and initialize the stack
|
|
||||||
* - Setup the input parameters for the task.
|
|
||||||
* - Initialization of the TCB (including call to up_initial_state())
|
|
||||||
* 4) up_vfork() provides any additional operating context. up_vfork must:
|
|
||||||
* - Initialize special values in any CPU registers that were not
|
|
||||||
* already configured by up_initial_state()
|
|
||||||
* 5) up_vfork() then calls nxtask_start_vfork()
|
|
||||||
* 6) nxtask_start_vfork() then executes the child thread.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* None
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* Upon successful completion, vfork() returns 0 to the child process and
|
|
||||||
* returns the process ID of the child process to the parent process.
|
|
||||||
* Otherwise, -1 is returned to the parent, no child process is created,
|
|
||||||
* and errno is set to indicate the error.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl vfork
|
|
||||||
.type vfork, function
|
|
||||||
vfork:
|
|
||||||
/* Create a stack frame */
|
|
||||||
|
|
||||||
mov r0, sp /* Save the value of the stack on entry */
|
|
||||||
sub sp, sp, #VFORK_SIZEOF /* Allocate the structure on the stack */
|
|
||||||
|
|
||||||
/* CPU registers */
|
|
||||||
/* Save the volatile registers */
|
|
||||||
|
|
||||||
str r4, [sp, #VFORK_R4_OFFSET]
|
|
||||||
str r5, [sp, #VFORK_R5_OFFSET]
|
|
||||||
str r6, [sp, #VFORK_R6_OFFSET]
|
|
||||||
str r7, [sp, #VFORK_R7_OFFSET]
|
|
||||||
str r8, [sp, #VFORK_R8_OFFSET]
|
|
||||||
str r9, [sp, #VFORK_R9_OFFSET]
|
|
||||||
str r10, [sp, #VFORK_R10_OFFSET]
|
|
||||||
|
|
||||||
/* Save the frame pointer, stack pointer, and return address */
|
|
||||||
|
|
||||||
str fp, [sp, #VFORK_FP_OFFSET]
|
|
||||||
str r0, [sp, #VFORK_SP_OFFSET]
|
|
||||||
str lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
|
|
||||||
/* Floating point registers (not yet) */
|
|
||||||
|
|
||||||
/* Then, call up_vfork(), passing it a pointer to the stack structure */
|
|
||||||
|
|
||||||
mov r0, sp
|
|
||||||
bl up_vfork
|
|
||||||
|
|
||||||
/* Release the stack data and return the value returned by up_vfork */
|
|
||||||
|
|
||||||
ldr lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
add sp, sp, #VFORK_SIZEOF
|
|
||||||
bx lr
|
|
||||||
.size vfork, .-vfork
|
|
||||||
.end
|
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv7-m/gnu/arm_exception.S
|
* arch/arm/src/armv7-m/arm_exception.S
|
||||||
*
|
*
|
||||||
* Copyright (C) 2009-2013, 2015-2016, 2018 Gregory Nutt.
|
* Copyright (C) 2009-2013, 2015-2016, 2018 Gregory Nutt.
|
||||||
* All rights reserved.
|
* All rights reserved.
|
||||||
@ -1,242 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-m/gnu/arm_fetchadd.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
.syntax unified
|
|
||||||
.thumb
|
|
||||||
.file "arm_fetchadd.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd32
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 32-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 32-bit value to be incremented.
|
|
||||||
* value - The 32-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd32
|
|
||||||
.type up_fetchadd32, %function
|
|
||||||
|
|
||||||
up_fetchadd32:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrex r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strex r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strex failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd32, . - up_fetchadd32
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub32
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 32-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 32-bit value to be decremented.
|
|
||||||
* value - The 32-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub32
|
|
||||||
.type up_fetchsub32, %function
|
|
||||||
|
|
||||||
up_fetchsub32:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrex r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
strex r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strex failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub32, . - up_fetchsub32
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd16
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 16-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 16-bit value to be incremented.
|
|
||||||
* value - The 16-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd16
|
|
||||||
.type up_fetchadd16, %function
|
|
||||||
|
|
||||||
up_fetchadd16:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexh r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strexh r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexh failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd16, . - up_fetchadd16
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub16
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 16-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 16-bit value to be decremented.
|
|
||||||
* value - The 16-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub16
|
|
||||||
.type up_fetchsub16, %function
|
|
||||||
|
|
||||||
up_fetchsub16:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexh r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
/* Attempt to save the decremented value */
|
|
||||||
|
|
||||||
strexh r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexh failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub16, . - up_fetchsub16
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd8
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 8-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 8-bit value to be incremented.
|
|
||||||
* value - The 8-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd8
|
|
||||||
.type up_fetchadd8, %function
|
|
||||||
|
|
||||||
up_fetchadd8:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strexb r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexb failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd8, . - up_fetchadd8
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub8
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 8-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 8-bit value to be decremented.
|
|
||||||
* value - The 8-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub8
|
|
||||||
.type up_fetchsub8, %function
|
|
||||||
|
|
||||||
up_fetchsub8:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
strexb r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexb failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub8, . - up_fetchsub8
|
|
||||||
.end
|
|
||||||
@ -1,102 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-m/gnu/arm_signal_handler.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
#include <arch/syscall.h>
|
|
||||||
|
|
||||||
#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__)
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* File info
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.syntax unified
|
|
||||||
.thumb
|
|
||||||
.file "arm_signal_handler.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Private Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_signal_handler
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* This function is the user-space, signal handler trampoline function. It
|
|
||||||
* is called from up_signal_dispatch() in user-mode.
|
|
||||||
*
|
|
||||||
* R0-R3, R11 - volatile registers need not be preserved.
|
|
||||||
* R4-R10 - static registers must be preserved
|
|
||||||
* R12-R14 - LR and SP must be preserved
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* R0 = sighand
|
|
||||||
* The address user-space signal handling function
|
|
||||||
* R1-R3 = signo, info, and ucontext
|
|
||||||
* Standard arguments to be passed to the signal handling function.
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* None. This function does not return in the normal sense. It returns
|
|
||||||
* via the SYS_signal_handler_return (see syscall.h)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
.thumb_func
|
|
||||||
.globl up_signal_handler
|
|
||||||
.type up_signal_handler, function
|
|
||||||
up_signal_handler:
|
|
||||||
|
|
||||||
/* Save some register */
|
|
||||||
|
|
||||||
push {lr} /* Save LR on the stack */
|
|
||||||
|
|
||||||
/* Call the signal handler */
|
|
||||||
|
|
||||||
mov ip, r0 /* IP=sighand */
|
|
||||||
mov r0, r1 /* R0=signo */
|
|
||||||
mov r1, r2 /* R1=info */
|
|
||||||
mov r2, r3 /* R2=ucontext */
|
|
||||||
blx ip /* Call the signal handler */
|
|
||||||
|
|
||||||
/* Restore the registers */
|
|
||||||
|
|
||||||
pop {r2} /* Recover LR in R2 */
|
|
||||||
mov lr, r2 /* Restore LR */
|
|
||||||
|
|
||||||
/* Execute the SYS_signal_handler_return SVCall (will not return) */
|
|
||||||
|
|
||||||
mov r0, #SYS_signal_handler_return
|
|
||||||
svc #SYS_syscall
|
|
||||||
nop
|
|
||||||
|
|
||||||
.size up_signal_handler, .-up_signal_handler
|
|
||||||
.end
|
|
||||||
|
|
||||||
#endif /* CONFIG_BUILD_PROTECTED && !__KERNEL__ */
|
|
||||||
@ -1,108 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-m/gnu/arm_testset.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
#include <arch/spinlock.h>
|
|
||||||
|
|
||||||
.syntax unified
|
|
||||||
.thumb
|
|
||||||
.file "arm_testset.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_testset
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Assembly Macros
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Private Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_testset
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic test and set operation on the provided spinlock.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* lock - A reference to the spinlock object.
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The spinlock is always locked upon return. The previous value of the
|
|
||||||
* spinlock variable is returned, either SP_LOCKED if the spinlock was
|
|
||||||
* previously locked (meaning that the test-and-set operation failed to
|
|
||||||
* obtain the lock) or SP_UNLOCKED if the spinlock was previously unlocked
|
|
||||||
* (meaning that we successfully obtained the lock).
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_testset
|
|
||||||
.type up_testset, %function
|
|
||||||
|
|
||||||
up_testset:
|
|
||||||
|
|
||||||
mov r1, #SP_LOCKED
|
|
||||||
|
|
||||||
/* Test if the spinlock is locked or not */
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Test if spinlock is locked or not */
|
|
||||||
cmp r2, r1 /* Already locked? */
|
|
||||||
beq 2f /* If already locked, return SP_LOCKED */
|
|
||||||
|
|
||||||
/* Not locked ... attempt to lock it */
|
|
||||||
|
|
||||||
strexb r2, r1, [r0] /* Attempt to set the locked state */
|
|
||||||
cmp r2, r1 /* r2 will be 1 is strexb failed */
|
|
||||||
beq 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
/* Lock acquired -- return SP_UNLOCKED */
|
|
||||||
|
|
||||||
dmb /* Required before accessing protected resource */
|
|
||||||
mov r0, #SP_UNLOCKED
|
|
||||||
bx lr
|
|
||||||
|
|
||||||
/* Lock not acquired -- return SP_LOCKED */
|
|
||||||
|
|
||||||
2:
|
|
||||||
mov r0, #SP_LOCKED
|
|
||||||
bx lr
|
|
||||||
.size up_testset, . - up_testset
|
|
||||||
.end
|
|
||||||
@ -1,127 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-m/gnu/vfork.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
#include "arm_vfork.h"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.syntax unified
|
|
||||||
.thumb
|
|
||||||
.file "vfork.S"
|
|
||||||
.globl up_vfork
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: vfork
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* The vfork() function has the same effect as fork(), except that the
|
|
||||||
* behavior is undefined if the process created by vfork() either modifies
|
|
||||||
* any data other than a variable of type pid_t used to store the return
|
|
||||||
* value from vfork(), or returns from the function in which vfork() was
|
|
||||||
* called, or calls any other function before successfully calling _exit()
|
|
||||||
* or one of the exec family of functions.
|
|
||||||
*
|
|
||||||
* This thin layer implements vfork by simply calling up_vfork() with the
|
|
||||||
* vfork() context as an argument. The overall sequence is:
|
|
||||||
*
|
|
||||||
* 1) User code calls vfork(). vfork() collects context information and
|
|
||||||
* transfers control up up_vfork().
|
|
||||||
* 2) up_vfork() and calls nxtask_setup_vfork().
|
|
||||||
* 3) nxtask_setup_vfork() allocates and configures the child task's TCB.
|
|
||||||
* This consists of:
|
|
||||||
* - Allocation of the child task's TCB.
|
|
||||||
* - Initialization of file descriptors and streams
|
|
||||||
* - Configuration of environment variables
|
|
||||||
* - Allocate and initialize the stack
|
|
||||||
* - Setup the input parameters for the task.
|
|
||||||
* - Initialization of the TCB (including call to up_initial_state())
|
|
||||||
* 4) up_vfork() provides any additional operating context. up_vfork must:
|
|
||||||
* - Initialize special values in any CPU registers that were not
|
|
||||||
* already configured by up_initial_state()
|
|
||||||
* 5) up_vfork() then calls nxtask_start_vfork()
|
|
||||||
* 6) nxtask_start_vfork() then executes the child thread.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* None
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* Upon successful completion, vfork() returns 0 to the child process and
|
|
||||||
* returns the process ID of the child process to the parent process.
|
|
||||||
* Otherwise, -1 is returned to the parent, no child process is created,
|
|
||||||
* and errno is set to indicate the error.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.thumb_func
|
|
||||||
.globl vfork
|
|
||||||
.type vfork, function
|
|
||||||
vfork:
|
|
||||||
/* Create a stack frame */
|
|
||||||
|
|
||||||
mov r0, sp /* Save the value of the stack on entry */
|
|
||||||
sub sp, sp, #VFORK_SIZEOF /* Allocate the structure on the stack */
|
|
||||||
|
|
||||||
/* CPU registers */
|
|
||||||
/* Save the volatile registers */
|
|
||||||
|
|
||||||
str r4, [sp, #VFORK_R4_OFFSET]
|
|
||||||
str r5, [sp, #VFORK_R5_OFFSET]
|
|
||||||
str r6, [sp, #VFORK_R6_OFFSET]
|
|
||||||
str r7, [sp, #VFORK_R7_OFFSET]
|
|
||||||
str r8, [sp, #VFORK_R8_OFFSET]
|
|
||||||
str r9, [sp, #VFORK_R9_OFFSET]
|
|
||||||
str r10, [sp, #VFORK_R10_OFFSET]
|
|
||||||
|
|
||||||
/* Save the frame pointer, stack pointer, and return address */
|
|
||||||
|
|
||||||
str fp, [sp, #VFORK_FP_OFFSET]
|
|
||||||
str r0, [sp, #VFORK_SP_OFFSET]
|
|
||||||
str lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
|
|
||||||
/* Floating point registers (not yet) */
|
|
||||||
|
|
||||||
/* Then, call up_vfork(), passing it a pointer to the stack structure */
|
|
||||||
|
|
||||||
mov r0, sp
|
|
||||||
bl up_vfork
|
|
||||||
|
|
||||||
/* Release the stack data and return the value returned by up_vfork */
|
|
||||||
|
|
||||||
ldr lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
add sp, sp, #VFORK_SIZEOF
|
|
||||||
bx lr
|
|
||||||
.size vfork, .-vfork
|
|
||||||
.end
|
|
||||||
@ -1,240 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-r/arm_fetchadd.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
.file "arm_fetchadd.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd32
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 32-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 32-bit value to be incremented.
|
|
||||||
* value - The 32-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd32
|
|
||||||
.type up_fetchadd32, %function
|
|
||||||
|
|
||||||
up_fetchadd32:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrex r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strex r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strex failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd32, . - up_fetchadd32
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub32
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 32-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 32-bit value to be decremented.
|
|
||||||
* value - The 32-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub32
|
|
||||||
.type up_fetchsub32, %function
|
|
||||||
|
|
||||||
up_fetchsub32:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrex r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
strex r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strex failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub32, . - up_fetchsub32
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd16
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 16-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 16-bit value to be incremented.
|
|
||||||
* value - The 16-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd16
|
|
||||||
.type up_fetchadd16, %function
|
|
||||||
|
|
||||||
up_fetchadd16:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexh r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strexh r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexh failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd16, . - up_fetchadd16
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub16
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 16-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 16-bit value to be decremented.
|
|
||||||
* value - The 16-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub16
|
|
||||||
.type up_fetchsub16, %function
|
|
||||||
|
|
||||||
up_fetchsub16:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexh r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
/* Attempt to save the decremented value */
|
|
||||||
|
|
||||||
strexh r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexh failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub16, . - up_fetchsub16
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchadd8
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch add operation on the provided 8-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 8-bit value to be incremented.
|
|
||||||
* value - The 8-bit addend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The incremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchadd8
|
|
||||||
.type up_fetchadd8, %function
|
|
||||||
|
|
||||||
up_fetchadd8:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Fetch the value to be incremented */
|
|
||||||
add r2, r2, r1 /* Add the addend */
|
|
||||||
|
|
||||||
strexb r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexb failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the incremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchadd8, . - up_fetchadd8
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_fetchsub8
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic fetch subtract operation on the provided 8-bit value.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* addr - The address of 8-bit value to be decremented.
|
|
||||||
* value - The 8-bit subtrahend
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The decremented value (volatile!)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_fetchsub8
|
|
||||||
.type up_fetchsub8, %function
|
|
||||||
|
|
||||||
up_fetchsub8:
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Fetch the value to be decremented */
|
|
||||||
sub r2, r2, r1 /* Subtract the subtrahend */
|
|
||||||
|
|
||||||
strexb r3, r2, [r0] /* Attempt to save the result */
|
|
||||||
teq r3, #0 /* r3 will be 1 if strexb failed */
|
|
||||||
bne 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
mov r0, r2 /* Return the decremented value */
|
|
||||||
bx lr /* Successful! */
|
|
||||||
.size up_fetchsub8, . - up_fetchsub8
|
|
||||||
.end
|
|
||||||
@ -1,99 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-r/arm_signal_handler.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
#include <arch/syscall.h>
|
|
||||||
|
|
||||||
#if defined(CONFIG_BUILD_PROTECTED) && !defined(__KERNEL__)
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* File info
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.file "arm_signal_handler.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Private Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_signal_handler
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* This function is the user-space, signal handler trampoline function. It
|
|
||||||
* is called from up_signal_dispatch() in user-mode.
|
|
||||||
*
|
|
||||||
* R0-R3, R11 - volatile registers need not be preserved.
|
|
||||||
* R4-R10 - static registers must be preserved
|
|
||||||
* R12-R14 - LR and SP must be preserved
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* R0 = sighand
|
|
||||||
* The address user-space signal handling function
|
|
||||||
* R1-R3 = signo, info, and ucontext
|
|
||||||
* Standard arguments to be passed to the signal handling function.
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* None. This function does not return in the normal sense. It returns
|
|
||||||
* via the SYS_signal_handler_return (see syscall.h)
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
.globl up_signal_handler
|
|
||||||
.type up_signal_handler, function
|
|
||||||
up_signal_handler:
|
|
||||||
|
|
||||||
/* Save some register */
|
|
||||||
|
|
||||||
push {lr} /* Save LR on the stack */
|
|
||||||
|
|
||||||
/* Call the signal handler */
|
|
||||||
|
|
||||||
mov ip, r0 /* IP=sighand */
|
|
||||||
mov r0, r1 /* R0=signo */
|
|
||||||
mov r1, r2 /* R1=info */
|
|
||||||
mov r2, r3 /* R2=ucontext */
|
|
||||||
blx ip /* Call the signal handler */
|
|
||||||
|
|
||||||
/* Restore the registers */
|
|
||||||
|
|
||||||
pop {r2} /* Recover LR in R2 */
|
|
||||||
mov lr, r2 /* Restore LR */
|
|
||||||
|
|
||||||
/* Execute the SYS_signal_handler_return SVCall (will not return) */
|
|
||||||
|
|
||||||
mov r0, #SYS_signal_handler_return
|
|
||||||
svc #SYS_syscall
|
|
||||||
nop
|
|
||||||
|
|
||||||
.size up_signal_handler, .-up_signal_handler
|
|
||||||
.end
|
|
||||||
|
|
||||||
#endif /* CONFIG_BUILD_PROTECTED && !__KERNEL__ */
|
|
||||||
@ -1,106 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-r/arm_testset.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
#include <arch/spinlock.h>
|
|
||||||
|
|
||||||
.file "arm_testset.S"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_testset
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Assembly Macros
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Private Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.text
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: up_testset
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* Perform an atomic test and set operation on the provided spinlock.
|
|
||||||
*
|
|
||||||
* This function must be provided via the architecture-specific logic.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* lock - A reference to the spinlock object.
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* The spinlock is always locked upon return. The previous value of the
|
|
||||||
* spinlock variable is returned, either SP_LOCKED if the spinlock was
|
|
||||||
* previously locked (meaning that the test-and-set operation failed to
|
|
||||||
* obtain the lock) or SP_UNLOCKED if the spinlock was previously unlocked
|
|
||||||
* (meaning that we successfully obtained the lock).
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl up_testset
|
|
||||||
.type up_testset, %function
|
|
||||||
|
|
||||||
up_testset:
|
|
||||||
|
|
||||||
mov r1, #SP_LOCKED
|
|
||||||
|
|
||||||
/* Test if the spinlock is locked or not */
|
|
||||||
|
|
||||||
1:
|
|
||||||
ldrexb r2, [r0] /* Test if spinlock is locked or not */
|
|
||||||
cmp r2, r1 /* Already locked? */
|
|
||||||
beq 2f /* If already locked, return SP_LOCKED */
|
|
||||||
|
|
||||||
/* Not locked ... attempt to lock it */
|
|
||||||
|
|
||||||
strexb r2, r1, [r0] /* Attempt to set the locked state */
|
|
||||||
cmp r2, r1 /* r2 will be 1 is strexb failed */
|
|
||||||
beq 1b /* Failed to lock... try again */
|
|
||||||
|
|
||||||
/* Lock acquired -- return SP_UNLOCKED */
|
|
||||||
|
|
||||||
dmb /* Required before accessing protected resource */
|
|
||||||
mov r0, #SP_UNLOCKED
|
|
||||||
bx lr
|
|
||||||
|
|
||||||
/* Lock not acquired -- return SP_LOCKED */
|
|
||||||
|
|
||||||
2:
|
|
||||||
mov r0, #SP_LOCKED
|
|
||||||
bx lr
|
|
||||||
.size up_testset, . - up_testset
|
|
||||||
.end
|
|
||||||
@ -1,124 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv7-r/vfork.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
#include "arm_vfork.h"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.file "vfork.S"
|
|
||||||
.globl up_vfork
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: vfork
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* The vfork() function has the same effect as fork(), except that the
|
|
||||||
* behavior is undefined if the process created by vfork() either modifies
|
|
||||||
* any data other than a variable of type pid_t used to store the return
|
|
||||||
* value from vfork(), or returns from the function in which vfork() was
|
|
||||||
* called, or calls any other function before successfully calling _exit()
|
|
||||||
* or one of the exec family of functions.
|
|
||||||
*
|
|
||||||
* This thin layer implements vfork by simply calling up_vfork() with the
|
|
||||||
* vfork() context as an argument. The overall sequence is:
|
|
||||||
*
|
|
||||||
* 1) User code calls vfork(). vfork() collects context information and
|
|
||||||
* transfers control up up_vfork().
|
|
||||||
* 2) up_vfork() and calls nxtask_setup_vfork().
|
|
||||||
* 3) nxtask_setup_vfork() allocates and configures the child task's TCB.
|
|
||||||
* This consists of:
|
|
||||||
* - Allocation of the child task's TCB.
|
|
||||||
* - Initialization of file descriptors and streams
|
|
||||||
* - Configuration of environment variables
|
|
||||||
* - Allocate and initialize the stack
|
|
||||||
* - Setup the input parameters for the task.
|
|
||||||
* - Initialization of the TCB (including call to up_initial_state())
|
|
||||||
* 4) up_vfork() provides any additional operating context. up_vfork must:
|
|
||||||
* - Initialize special values in any CPU registers that were not
|
|
||||||
* already configured by up_initial_state()
|
|
||||||
* 5) up_vfork() then calls nxtask_start_vfork()
|
|
||||||
* 6) nxtask_start_vfork() then executes the child thread.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* None
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* Upon successful completion, vfork() returns 0 to the child process and
|
|
||||||
* returns the process ID of the child process to the parent process.
|
|
||||||
* Otherwise, -1 is returned to the parent, no child process is created,
|
|
||||||
* and errno is set to indicate the error.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.globl vfork
|
|
||||||
.type vfork, function
|
|
||||||
vfork:
|
|
||||||
/* Create a stack frame */
|
|
||||||
|
|
||||||
mov r0, sp /* Save the value of the stack on entry */
|
|
||||||
sub sp, sp, #VFORK_SIZEOF /* Allocate the structure on the stack */
|
|
||||||
|
|
||||||
/* CPU registers */
|
|
||||||
/* Save the volatile registers */
|
|
||||||
|
|
||||||
str r4, [sp, #VFORK_R4_OFFSET]
|
|
||||||
str r5, [sp, #VFORK_R5_OFFSET]
|
|
||||||
str r6, [sp, #VFORK_R6_OFFSET]
|
|
||||||
str r7, [sp, #VFORK_R7_OFFSET]
|
|
||||||
str r8, [sp, #VFORK_R8_OFFSET]
|
|
||||||
str r9, [sp, #VFORK_R9_OFFSET]
|
|
||||||
str r10, [sp, #VFORK_R10_OFFSET]
|
|
||||||
|
|
||||||
/* Save the frame pointer, stack pointer, and return address */
|
|
||||||
|
|
||||||
str fp, [sp, #VFORK_FP_OFFSET]
|
|
||||||
str r0, [sp, #VFORK_SP_OFFSET]
|
|
||||||
str lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
|
|
||||||
/* Floating point registers (not yet) */
|
|
||||||
|
|
||||||
/* Then, call up_vfork(), passing it a pointer to the stack structure */
|
|
||||||
|
|
||||||
mov r0, sp
|
|
||||||
bl up_vfork
|
|
||||||
|
|
||||||
/* Release the stack data and return the value returned by up_vfork */
|
|
||||||
|
|
||||||
ldr lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
add sp, sp, #VFORK_SIZEOF
|
|
||||||
bx lr
|
|
||||||
.size vfork, .-vfork
|
|
||||||
.end
|
|
||||||
@ -1,127 +0,0 @@
|
|||||||
/****************************************************************************
|
|
||||||
* arch/arm/src/armv8-m/vfork.S
|
|
||||||
*
|
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
|
||||||
* this work for additional information regarding copyright ownership. The
|
|
||||||
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
||||||
* "License"); you may not use this file except in compliance with the
|
|
||||||
* License. You may obtain a copy of the License at
|
|
||||||
*
|
|
||||||
* http://www.apache.org/licenses/LICENSE-2.0
|
|
||||||
*
|
|
||||||
* Unless required by applicable law or agreed to in writing, software
|
|
||||||
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
||||||
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
||||||
* License for the specific language governing permissions and limitations
|
|
||||||
* under the License.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Included Files
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
#include <nuttx/config.h>
|
|
||||||
|
|
||||||
#include "arm_vfork.h"
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.syntax unified
|
|
||||||
.thumb
|
|
||||||
.file "vfork.S"
|
|
||||||
.globl up_vfork
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Functions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Name: vfork
|
|
||||||
*
|
|
||||||
* Description:
|
|
||||||
* The vfork() function has the same effect as fork(), except that the
|
|
||||||
* behavior is undefined if the process created by vfork() either modifies
|
|
||||||
* any data other than a variable of type pid_t used to store the return
|
|
||||||
* value from vfork(), or returns from the function in which vfork() was
|
|
||||||
* called, or calls any other function before successfully calling _exit()
|
|
||||||
* or one of the exec family of functions.
|
|
||||||
*
|
|
||||||
* This thin layer implements vfork by simply calling up_vfork() with the
|
|
||||||
* vfork() context as an argument. The overall sequence is:
|
|
||||||
*
|
|
||||||
* 1) User code calls vfork(). vfork() collects context information and
|
|
||||||
* transfers control up up_vfork().
|
|
||||||
* 2) up_vfork() and calls nxtask_setup_vfork().
|
|
||||||
* 3) nxtask_setup_vfork() allocates and configures the child task's TCB.
|
|
||||||
* This consists of:
|
|
||||||
* - Allocation of the child task's TCB.
|
|
||||||
* - Initialization of file descriptors and streams
|
|
||||||
* - Configuration of environment variables
|
|
||||||
* - Allocate and initialize the stack
|
|
||||||
* - Setup the input parameters for the task.
|
|
||||||
* - Initialization of the TCB (including call to up_initial_state())
|
|
||||||
* 4) up_vfork() provides any additional operating context. up_vfork must:
|
|
||||||
* - Initialize special values in any CPU registers that were not
|
|
||||||
* already configured by up_initial_state()
|
|
||||||
* 5) up_vfork() then calls nxtask_start_vfork()
|
|
||||||
* 6) nxtask_start_vfork() then executes the child thread.
|
|
||||||
*
|
|
||||||
* Input Parameters:
|
|
||||||
* None
|
|
||||||
*
|
|
||||||
* Returned Value:
|
|
||||||
* Upon successful completion, vfork() returns 0 to the child process and
|
|
||||||
* returns the process ID of the child process to the parent process.
|
|
||||||
* Otherwise, -1 is returned to the parent, no child process is created,
|
|
||||||
* and errno is set to indicate the error.
|
|
||||||
*
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.thumb_func
|
|
||||||
.globl vfork
|
|
||||||
.type vfork, function
|
|
||||||
vfork:
|
|
||||||
/* Create a stack frame */
|
|
||||||
|
|
||||||
mov r0, sp /* Save the value of the stack on entry */
|
|
||||||
sub sp, sp, #VFORK_SIZEOF /* Allocate the structure on the stack */
|
|
||||||
|
|
||||||
/* CPU registers */
|
|
||||||
/* Save the volatile registers */
|
|
||||||
|
|
||||||
str r4, [sp, #VFORK_R4_OFFSET]
|
|
||||||
str r5, [sp, #VFORK_R5_OFFSET]
|
|
||||||
str r6, [sp, #VFORK_R6_OFFSET]
|
|
||||||
str r7, [sp, #VFORK_R7_OFFSET]
|
|
||||||
str r8, [sp, #VFORK_R8_OFFSET]
|
|
||||||
str r9, [sp, #VFORK_R9_OFFSET]
|
|
||||||
str r10, [sp, #VFORK_R10_OFFSET]
|
|
||||||
|
|
||||||
/* Save the frame pointer, stack pointer, and return address */
|
|
||||||
|
|
||||||
str fp, [sp, #VFORK_FP_OFFSET]
|
|
||||||
str r0, [sp, #VFORK_SP_OFFSET]
|
|
||||||
str lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
|
|
||||||
/* Floating point registers (not yet) */
|
|
||||||
|
|
||||||
/* Then, call up_vfork(), passing it a pointer to the stack structure */
|
|
||||||
|
|
||||||
mov r0, sp
|
|
||||||
bl up_vfork
|
|
||||||
|
|
||||||
/* Release the stack data and return the value returned by up_vfork */
|
|
||||||
|
|
||||||
ldr lr, [sp, #VFORK_LR_OFFSET]
|
|
||||||
add sp, sp, #VFORK_SIZEOF
|
|
||||||
bx lr
|
|
||||||
.size vfork, .-vfork
|
|
||||||
.end
|
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv8-m/arm_fetchadd.S
|
* arch/arm/src/common/gnu/arm_fetchadd.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
@ -25,7 +25,6 @@
|
|||||||
#include <nuttx/config.h>
|
#include <nuttx/config.h>
|
||||||
|
|
||||||
.syntax unified
|
.syntax unified
|
||||||
.thumb
|
|
||||||
.file "arm_fetchadd.S"
|
.file "arm_fetchadd.S"
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv8-m/arm_signal_handler.S
|
* arch/arm/src/common/gnu/arm_signal_handler.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
@ -33,7 +33,6 @@
|
|||||||
****************************************************************************/
|
****************************************************************************/
|
||||||
|
|
||||||
.syntax unified
|
.syntax unified
|
||||||
.thumb
|
|
||||||
.file "arm_signal_handler.S"
|
.file "arm_signal_handler.S"
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv8-m/arm_testset.S
|
* arch/arm/src/common/gnu/arm_testset.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
@ -26,7 +26,6 @@
|
|||||||
#include <arch/spinlock.h>
|
#include <arch/spinlock.h>
|
||||||
|
|
||||||
.syntax unified
|
.syntax unified
|
||||||
.thumb
|
|
||||||
.file "arm_testset.S"
|
.file "arm_testset.S"
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv6-m/vfork.S
|
* arch/arm/src/common/vfork.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
@ -26,16 +26,8 @@
|
|||||||
|
|
||||||
#include "arm_vfork.h"
|
#include "arm_vfork.h"
|
||||||
|
|
||||||
/****************************************************************************
|
.syntax unified
|
||||||
* Pre-processor Definitions
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
/****************************************************************************
|
|
||||||
* Public Symbols
|
|
||||||
****************************************************************************/
|
|
||||||
|
|
||||||
.file "vfork.S"
|
.file "vfork.S"
|
||||||
.globl up_vfork
|
|
||||||
|
|
||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* Public Functions
|
* Public Functions
|
||||||
@ -83,11 +75,9 @@
|
|||||||
*
|
*
|
||||||
****************************************************************************/
|
****************************************************************************/
|
||||||
|
|
||||||
.align 2
|
|
||||||
.code 16
|
|
||||||
.thumb_func
|
|
||||||
.globl vfork
|
.globl vfork
|
||||||
.type vfork, function
|
.type vfork, function
|
||||||
|
|
||||||
vfork:
|
vfork:
|
||||||
/* Create a stack frame */
|
/* Create a stack frame */
|
||||||
|
|
||||||
@ -123,5 +113,6 @@ vfork:
|
|||||||
mov r14, r1
|
mov r14, r1
|
||||||
add sp, sp, #VFORK_SIZEOF
|
add sp, sp, #VFORK_SIZEOF
|
||||||
bx lr
|
bx lr
|
||||||
|
|
||||||
.size vfork, .-vfork
|
.size vfork, .-vfork
|
||||||
.end
|
.end
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv7-m/iar/arm_fetchadd.S
|
* arch/arm/src/common/iar/arm_fetchadd.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv7-m/iar/arm_testset.S
|
* arch/arm/src/common/iar/arm_testset.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
@ -1,5 +1,5 @@
|
|||||||
/****************************************************************************
|
/****************************************************************************
|
||||||
* arch/arm/src/armv7-m/iar/vfork.S
|
* arch/arm/src/common/iar/vfork.S
|
||||||
*
|
*
|
||||||
* Licensed to the Apache Software Foundation (ASF) under one or more
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
||||||
* contributor license agreements. See the NOTICE file distributed with
|
* contributor license agreements. See the NOTICE file distributed with
|
||||||
Loading…
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Reference in New Issue
Block a user