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| author | Benji Dial <benji6283@gmail.com> | 2021-01-24 12:00:11 -0500 |
|---|---|---|
| committer | Benji Dial <benji6283@gmail.com> | 2021-01-24 12:00:11 -0500 |
| commit | bce944d1498eaa3b6940ee234c863b3548a66b37 (patch) | |
| tree | ea40c087ab4f0f236aee8d158cf68550f5209f72 /src/user/runtimes/c/pcrt.asm | |
| parent | ca731aa747214919df7b3dfe3478dbe787ce5b68 (diff) | |
| download | portland-os-bce944d1498eaa3b6940ee234c863b3548a66b37.tar.gz | |
graphics!
Diffstat (limited to 'src/user/runtimes/c/pcrt.asm')
| -rw-r--r-- | src/user/runtimes/c/pcrt.asm | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/user/runtimes/c/pcrt.asm b/src/user/runtimes/c/pcrt.asm new file mode 100644 index 0000000..85c898c --- /dev/null +++ b/src/user/runtimes/c/pcrt.asm @@ -0,0 +1,45 @@ +bits 32 + +global __pcrt_entry +global __pcrt_quit +global calling_task +global stdio_task + +extern main +extern __pcrt_before_main_start +extern __pcrt_before_main_end +extern __pcrt_before_quit_start +extern __pcrt_before_quit_end + +section .text +__pcrt_entry: + mov dword [calling_task], esi + mov dword [stdio_task], edi + push edx + + mov ebx, __pcrt_before_main_start +.before_main_loop: + cmp ebx, __pcrt_before_main_end + je .call_main + call dword [ebx] + add ebx, 4 + jmp .before_main_loop + +.call_main: + call main + +__pcrt_quit: + mov ebx, __pcrt_before_quit_start +.before_quit_loop: + cmp ebx, __pcrt_before_quit_end + je .end_task + call dword [ebx] + add ebx, 4 + jmp .before_quit_loop + +.end_task: + int 0x38 + +section .bss +calling_task resd 1 +stdio_task resd 1
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