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| author | Charles <sircharlesaze@gmail.com> | 2020-02-23 06:31:47 +0100 |
|---|---|---|
| committer | Charles <sircharlesaze@gmail.com> | 2020-02-23 06:31:47 +0100 |
| commit | 28424105e255f0a4c887b6e6a83afd6dce372709 (patch) | |
| tree | 98a3665a7643c7f9b0bf2d75be1ff07e3b7fb647 /ft_write.s | |
| parent | fcc8ce8503f42980e6e8ed390363c8e8dc961363 (diff) | |
| download | libasm-28424105e255f0a4c887b6e6a83afd6dce372709.tar.gz libasm-28424105e255f0a4c887b6e6a83afd6dce372709.tar.bz2 libasm-28424105e255f0a4c887b6e6a83afd6dce372709.zip | |
Added ft_read.s ft_write.s error handling
Diffstat (limited to 'ft_write.s')
| -rw-r--r-- | ft_write.s | 34 |
1 files changed, 25 insertions, 9 deletions
@@ -12,20 +12,36 @@ global _ft_write +%define F_GETFD 1 +%define SYSCALL_WRITE 0x2000004 +%define SYSCALL_FCNTL 0x200005c + ; int ft_write(int rdi, const void *rsi, size_t rdx); _ft_write: - cmp rdx, 0 - je FT_WRITE_NO_SIZE - cmp rdi, 0 - jl FT_WRITE_ERROR - cmp rsi, 0 - je FT_WRITE_ERROR - mov rax, 0x2000004 + cmp rdx, 0 + je FT_WRITE_NO_SIZE + cmp rdi, 0 + jl FT_WRITE_ERROR ; fd < 0 + cmp rsi, 0 + je FT_WRITE_ERROR ; buf == NULL + + push rdx + push rsi + xor rsi, rsi + mov esi, F_GETFD + mov rax, SYSCALL_FCNTL + syscall + pop rsi + pop rdx + cmp eax, 0 + jne FT_WRITE_ERROR + + mov rax, SYSCALL_WRITE syscall ret FT_WRITE_ERROR: - mov rax, -1 + mov rax, -1 ret FT_WRITE_NO_SIZE: - mov rax, 0 + mov rax, 0 ret |