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Support for 32-bit Linux in Jerry's libc.

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This commit is contained in:
Ruben Ayrapetyan
2015-03-26 15:50:45 +03:00
parent 6b0b669c14
commit cf1960dbbd
3 changed files with 88 additions and 44 deletions
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jerry-libc/target/linux/asm_x86.h
+65 -44
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@@ -16,57 +16,78 @@
#ifndef ASM_X86_H
#define ASM_X86_H
FIXME(Implement x86 ABI);
#error "Not implemented"
/*
* mov syscall_no -> %eax
* mov arg1 -> %ebx
* int $0x80
* mov %eax -> ret
*/
#define SYSCALL_1 \
push %edi; \
push %esi; \
push %ebx; \
mov 0x10 (%esp), %eax; \
mov 0x14 (%esp), %ebx; \
int $0x80; \
pop %ebx; \
pop %esi; \
pop %edi; \
ret;
/*
* mov syscall_no -> %rax
* mov arg1 -> %rdi
* syscall
* mov %rax -> ret
* mov syscall_no -> %eax
* mov arg1 -> %ebx
* mov arg2 -> %ecx
* int $0x80
* mov %eax -> ret
*/
#define SYSCALL_1 (syscall_no, arg1, ret) \
__asm ("syscall" \
: "=a" (ret) \
: "a" (syscall_no), "D" (arg1) \
: "rcx", "r11");
#define SYSCALL_2 \
push %edi; \
push %esi; \
push %ebx; \
mov 0x10 (%esp), %eax; \
mov 0x14 (%esp), %ebx; \
mov 0x18 (%esp), %ecx; \
int $0x80; \
pop %ebx; \
pop %esi; \
pop %edi; \
ret;
/*
* mov syscall_no -> %rax
* mov arg1 -> %rdi
* mov arg2 -> %rsi
* syscall
* mov %rax -> ret
* mov syscall_no -> %eax
* mov arg1 -> %ebx
* mov arg2 -> %ecx
* mov arg3 -> %edx
* int $0x80
* mov %eax -> ret
*/
#define SYSCALL_2 (syscall_no, arg1, arg2, ret) \
__asm ("syscall" \
: "=a" (ret) \
: "a" (syscall_no), "D" (arg1), "S" (arg2) \
: "rcx", "r11");
#define SYSCALL_3 \
push %edi; \
push %esi; \
push %ebx; \
mov 0x10 (%esp), %eax; \
mov 0x14 (%esp), %ebx; \
mov 0x18 (%esp), %ecx; \
mov 0x1c (%esp), %edx; \
int $0x80; \
pop %ebx; \
pop %esi; \
pop %edi; \
ret;
/*
* mov syscall_no -> %rax
* mov arg1 -> %rdi
* mov arg2 -> %rsi
* mov arg3 -> %rdx
* syscall
* mov %rax -> ret
*/
#define SYSCALL_3 (syscall_no, arg1, arg2, arg3, ret) \
__asm ("syscall" \
: "=a" (ret) \
: "a" (syscall_no), "D" (arg1), "S" (arg2), "d" (arg3) \
: "rcx", "r11");
#define _START \
mov (%rsp), %rdi; \
mov %rsp, %rsi; \
add $8, %rsi; \
callq main; \
\
mov %rax, %rdi; \
callq exit; \
1: \
#define _START \
mov %esp, %eax; \
add $4, %eax; \
push %eax; \
mov 0x4 (%esp), %eax; \
push %eax; \
\
call main; \
\
push %eax; \
call exit; \
1: \
jmp 1b
#endif /* !ASM_X86_H */