diff options
Diffstat (limited to 'ia32/elf')
| -rw-r--r-- | ia32/elf/begin.sts | 1 | ||||
| -rw-r--r-- | ia32/elf/syscall.sts | 41 |
2 files changed, 42 insertions, 0 deletions
diff --git a/ia32/elf/begin.sts b/ia32/elf/begin.sts index 27b4714..8dab930 100644 --- a/ia32/elf/begin.sts +++ b/ia32/elf/begin.sts @@ -125,4 +125,5 @@ _return_stack ?. # ff ?' # 20 ?' module ia32/ia32.sts +module ia32/elf/syscall.sts module common/common.sts diff --git a/ia32/elf/syscall.sts b/ia32/elf/syscall.sts new file mode 100644 index 0000000..3acfef2 --- /dev/null +++ b/ia32/elf/syscall.sts @@ -0,0 +1,41 @@ +defasm sys_exit + # b8 ?' # 1 ?. ; mov eax, 1 + # 31 ?' # db ?' ; xor ebx, ebx + # cd ?' # 80 ?' ; int 0x80 +; no need in next since this is the last instruction + +_data_segment ?choose + ?$ ?? _iobuf # 0 ?. +_code_segment ?choose + +defasm sys_read + # b8 ?' # 3 ?. ; mov eax, 3 + # 31 ?' # db ?' ; xor ebx, ebx + # b9 ?' _iobuf ?. ; mov ecx, _iobuf + # ba ?' # 1 ?. ; mov edx, 1 + # cd ?' # 80 ?' ; int 0x80 + # 31 ?' # db ?' ; xor ebx, ebx + # 8a ?' # 1d ?' _iobuf ?. ; mov bl, [_iobuf] + # 53 ?' ; push ebx + # 50 ?' ; push eax +next + +defasm sys_write + # 58 ?' ; pop eax + # a2 ?' _iobuf ?. ; mov [_iobuf], al + # b8 ?' # 4 ?. ; mov eax, 4 + # bb ?' # 1 ?. ; mov ebx, 1 + # b9 ?' _iobuf ?. ; mov ecx, _iobuf + # ba ?' # 1 ?. ; mov edx, 1 + # cd ?' # 80 ?' ; int 0x80 +next + +defasm sys_write_err + # 58 ?' ; pop eax + # a2 ?' _iobuf ?. ; mov [_iobuf], al + # b8 ?' # 4 ?. ; mov eax, 4 + # bb ?' # 2 ?. ; mov ebx, 2 + # b9 ?' _iobuf ?. ; mov ecx, _iobuf + # ba ?' # 1 ?. ; mov edx, 1 + # cd ?' # 80 ?' ; int 0x80 +next |