From bce944d1498eaa3b6940ee234c863b3548a66b37 Mon Sep 17 00:00:00 2001 From: Benji Dial Date: Sun, 24 Jan 2021 12:00:11 -0500 Subject: graphics! --- src/user/runtimes/c/pcrt.asm | 45 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 src/user/runtimes/c/pcrt.asm (limited to 'src/user/runtimes/c/pcrt.asm') 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 \ No newline at end of file -- cgit v1.2.3