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xtensa: Add modlib boilerplate

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This is a modified copy of armv6-m/armv7-m version.
This commit is contained in:
YAMAMOTO Takashi 2020-03-05 11:26:21 +09:00 committed by patacongo
parent 8657305883
commit 5e1b24f012
5 changed files with 227 additions and 0 deletions
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3
libs/libc/machine/Kconfig
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@ -162,5 +162,8 @@ endif
if ARCH_X86
source libs/libc/machine/x86/Kconfig
endif
if ARCH_XTENSA
source libs/libc/machine/xtensa/Kconfig
endif
endmenu # Architecture-Specific Support

3
libs/libc/machine/Make.defs
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@ -45,3 +45,6 @@ endif
ifeq ($(CONFIG_ARCH_X86),y)
include ${TOPDIR}/libs/libc/machine/x86/Make.defs
endif
ifeq ($(CONFIG_ARCH_XTENSA),y)
include ${TOPDIR}/libs/libc/machine/xtensa/Make.defs
endif

4
libs/libc/machine/xtensa/Kconfig Normal file
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@ -0,0 +1,4 @@
#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

43
libs/libc/machine/xtensa/Make.defs Normal file
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@ -0,0 +1,43 @@
############################################################################
# libs/libc/machine/arm/armv6-m/Make.defs
#
# Copyright (C) 2017 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
ifeq ($(CONFIG_LIBC_ARCH_ELF),y)
CSRCS += arch_elf.c
DEPPATH += --dep-path machine/xtensa
VPATH += :machine/xtensa
endif

174
libs/libc/machine/xtensa/arch_elf.c Normal file
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@ -0,0 +1,174 @@
/****************************************************************************
* libs/libc/machine/arm/armv6-m/arch_elf.c
*
* Copyright (C) 2013-2014, 2017 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <errno.h>
#include <debug.h>
#include <arch/elf.h>
#include <nuttx/elf.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_checkarch
*
* Description:
* Given the ELF header in 'hdr', verify that the ELF file is appropriate
* for the current, configured architecture. Every architecture that uses
* the ELF loader must provide this function.
*
* Input Parameters:
* hdr - The ELF header read from the ELF file.
*
* Returned Value:
* True if the architecture supports this ELF file.
*
****************************************************************************/
bool up_checkarch(FAR const Elf32_Ehdr *ehdr)
{
/* Make sure it's an Xtensa executable */
if (ehdr->e_machine != EM_XTENSA)
{
berr("ERROR: Not for Xtensa: e_machine=%04x\n", ehdr->e_machine);
return false;
}
/* Make sure that 32-bit objects are supported */
if (ehdr->e_ident[EI_CLASS] != ELFCLASS32)
{
berr("ERROR: Need 32-bit objects: e_ident[EI_CLASS]=%02x\n", ehdr->e_ident[EI_CLASS]);
return false;
}
/* Verify endian-ness */
#ifdef CONFIG_ENDIAN_BIG
if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB)
#else
if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB)
#endif
{
berr("ERROR: Wrong endian-ness: e_ident[EI_DATA]=%02x\n", ehdr->e_ident[EI_DATA]);
return false;
}
return true;
}
/****************************************************************************
* Name: up_relocate and up_relocateadd
*
* Description:
* Perform on architecture-specific ELF relocation. Every architecture
* that uses the ELF loader must provide this function.
*
* Input Parameters:
* rel - The relocation type
* sym - The ELF symbol structure containing the fully resolved value.
* There are a few relocation types for a few architectures that do
* not require symbol information. For those, this value will be
* NULL. Implementations of these functions must be able to handle
* that case.
* addr - The address that requires the relocation.
*
* Returned Value:
* Zero (OK) if the relocation was successful. Otherwise, a negated errno
* value indicating the cause of the relocation failure.
*
****************************************************************************/
int up_relocate(FAR const Elf32_Rel *rel, FAR const Elf32_Sym *sym,
uintptr_t addr)
{
unsigned int relotype;
/* All relocations except NONE depend upon having valid symbol
* information.
*/
relotype = ELF32_R_TYPE(rel->r_info);
if (sym == NULL && relotype != R_XTENSA_NONE)
{
return -EINVAL;
}
/* Handle the relocation by relocation type */
switch (relotype)
{
case R_XTENSA_NONE:
{
/* No relocation */
}
break;
default:
berr("ERROR: Unsupported relocation: %d\n", ELF32_R_TYPE(rel->r_info));
return -EINVAL;
}
return OK;
}
int up_relocateadd(FAR const Elf32_Rela *rel, FAR const Elf32_Sym *sym,
uintptr_t addr)
{
berr("ERROR: RELA relocation not supported\n");
return -ENOSYS;
}