syscalls needed for doom (tell/eof/draw_fb) + minor fixes, compiler shut up etc

2026-05-10 21:25:41 +02:00
parent 22f20d47ad
commit 18ab2c7628
12 changed files with 507 additions and 169 deletions
@@ -0,0 +1,11 @@
+# Pepper kernel system call table
+
+The following table contains all of the system calls supported by PepperOS, as well as their arguments. The explanation for what every system call does is available as a comment above each function in corresponding files in the `src/syscall` folder.
+
+Name | Number (%rax) | arg0 (%rdi) | arg1 (%rsi) | arg2 (%rdx) |
+|---|---|---|---|---|
+| sys_read | 0 | unsigned int fd | char* buf | size_t count |
+| sys_write | 1 | unsigned int fd | const char* buf | size_t count |
+| sys_open | 2 | const char* filename | int flags | |
+| sys_close | 3 | unsigned int fd | | |
+| sys_exit | 60 | int error_code | | |