mirror of
https://github.com/jart/cosmopolitan.git
synced 2026-11-10 02:31:35 -10:00
47 lines
2.4 KiB
ArmAsm
47 lines
2.4 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
|
│vi: set et ft=asm ts=8 sw=8 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/macros.internal.h"
|
|
.source __FILE__
|
|
|
|
// Supplies basename(argv[0]) The GNU Way.
|
|
.initbss 400,_init_program_invocation_short_name
|
|
program_invocation_short_name:
|
|
.quad 0
|
|
.endobj program_invocation_short_name,globl
|
|
.previous
|
|
|
|
.init.start 400,_init_program_invocation_short_name
|
|
push %rsi
|
|
xor %eax,%eax
|
|
test %r12d,%r12d # argc
|
|
jz 2f
|
|
mov (%r13),%rsi # argv[0]
|
|
mov %rsi,%rcx
|
|
1: lodsb
|
|
cmp $'/',%al
|
|
cmoveq %rsi,%rcx
|
|
cmp $'\\',%al
|
|
cmoveq %rsi,%rcx
|
|
test %al,%al
|
|
jnz 1b
|
|
xchg %rcx,%rax
|
|
pop %rsi
|
|
2: stosq
|
|
.init.end 400,_init_program_invocation_short_name
|