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Add i486 toolchain support

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3349 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2011-03-07 02:53:37 +00:00
parent 239b017ed4
commit 47f6b44c9a
2 changed files with 23 additions and 23 deletions
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26
arch/x86/src/qemu/qemu_fullcontextrestore.S
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@ -111,34 +111,34 @@ SYMBOL(up_fullcontextrestore):
* stack pointer.
*/
movl (REG_SP)(%eax), %esp
movl (4*REG_SP)(%eax), %esp
/* Save the return address, EFLAGS, and the values as well the
* values of EBX and EAC on the new stack.
*/
movl (REG_EIP)(%eax), %ebx
movl (4*REG_EIP)(%eax), %ebx
push %ebx
movl (REG_EFLAGS)(%eax), %ebx
movl (4*REG_EFLAGS)(%eax), %ebx
push %ebx
movl (REG_EAX)(%eax), %ebx
movl (4*REG_EAX)(%eax), %ebx
push %ebx
movl (REG_EBX)(%eax), %ebx
movl (4*REG_EBX)(%eax), %ebx
push %ebx
/* Now restore the remaining registers */
movl (REG_EDI)(%ebx), %edi
movl (REG_ESI)(%ebx), %esi
movl (REG_EBP)(%ebx), %ebp
movl (REG_EDX)(%ebx), %edx
movl (REG_ECX)(%ebx), %ecx
movl (4*REG_EDI)(%ebx), %edi
movl (4*REG_ESI)(%ebx), %esi
movl (4*REG_EBP)(%ebx), %ebp
movl (4*REG_EDX)(%ebx), %edx
movl (4*REG_ECX)(%ebx), %ecx
/* Restore the segment registers */
mov (REG_DS)(%ebx), %ds
mov (REG_CS)(%ebx), %cs
mov (REG_SS)(%ebx), %ss
mov (4*REG_DS)(%ebx), %ds
mov (4*REG_CS)(%ebx), %cs
mov (4*REG_SS)(%ebx), %ss
/* Restore the correct value of EAX, EBX, and the EFLAGS then return */

20
arch/x86/src/qemu/qemu_saveusercontext.S
View File

@ -121,37 +121,37 @@ SYMBOL(up_saveusercontext):
* because it will be the return value from this function.
*/
movl %ebx, (REG_EBX)(%eax)
movl %esi, (REG_ESI)(%eax)
movl %edi, (REG_EDI)(%eax)
movl %ebx, (4*REG_EBX)(%eax)
movl %esi, (4*REG_ESI)(%eax)
movl %edi, (4*REG_EDI)(%eax)
/* Save the segment registers */
mov %ss, (REG_SS)(%eax)
mov %cs, (REG_CS)(%eax)
mov %ds, (REG_DS)(%eax)
mov %ss, (4*REG_SS)(%eax)
mov %cs, (4*REG_CS)(%eax)
mov %ds, (4*REG_DS)(%eax)
/* Save the value of SP as will be after we return (don't bother to save
* REG_ESP).
*/
leal 4(%esp), %ecx
movl %ecx, (REG_SP)(%eax)
movl %ecx, (4*REG_SP)(%eax)
/* Fetch the PC from the stack and save it in the save block */
movl 0(%esp), %ecx
movl %ecx, (REG_EIP)(%eax)
movl %ecx, (4*REG_EIP)(%eax)
/* Save the framepointer */
movl %ebp, (REG_EBP)(%eax)
movl %ebp, (4*REG_EBP)(%eax)
/* Get and save the interrupt state */
pushf
pop %ecx
movl %ecx, (REG_EFLAGS)(%eax)
movl %ecx, (4*REG_EFLAGS)(%eax)
/* And return 0. 'ret' will remove the EIP from the top of the stack. */