diff options
Diffstat (limited to 'documentation/syscalls.txt')
| -rw-r--r-- | documentation/syscalls.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/documentation/syscalls.txt b/documentation/syscalls.txt index 463f815..10bf2a9 100644 --- a/documentation/syscalls.txt +++ b/documentation/syscalls.txt @@ -8,6 +8,15 @@ for all system calls: rbx, rbp, rsp, r12-r15 are preserved. rcx, rflags, r8-r11 are clobbered. +file result: + 0 = success + 1 = bad file handle + 2 = device error + 3 = file system corrupt + 4 = tried to read out of bounds + 5 = file does not exist + 6 = tried to open directory + encode color: rax in: 0 edi in: r + g * 256 + b * 65536 @@ -20,3 +29,40 @@ get framebuffer: esi out: pitch framebuffer is always 32 bpp. use the encode color syscall to encode colors. pitch is in dwords, not in bytes. + +open file: + rax in: 2 + rdi in: pointer to file path + rsi in: file path length + rax out: file result + rdi out: file handle (if rax = success) + +get file length: + rax in: 3 + rdi in: file handle + rax out: file result + rdi out: file length (if rax = success) + +read from file: + rax in: 4 + rdi in: pointer to request struct + rax out: file result + request struct: + qword: file handle + qword: start offset in bytes + qword: length in bytes + qword: pointer to buffer + +end this process: + rax in: 5 + edi in: exit code (signed) + +get new pages: + rax in: 6 + rdi in: number of pages to allocate + rax out: start of first page + the allocated pages are next to each other, writable, and not executable. + +close file: + rax in: 7 + rdi in: file handle |