mirror of
https://github.com/jart/cosmopolitan.git
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1422e96b4e
There's a new program named ape/ape-m1.c which will be used to build an embeddable binary that can load ape and elf executables. The support is mostly working so far, but still chasing down ABI issues.
70 lines
3 KiB
C
70 lines
3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/runtime/syslib.internal.h"
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#include "libc/sysv/consts/sig.h"
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#include "libc/sysv/errfuns.h"
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int sys_fork(void) {
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#ifdef __x86_64__
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axdx_t ad;
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int ax, dx;
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ad = __sys_fork();
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ax = ad.ax;
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dx = ad.dx;
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if (IsXnu() && ax != -1) {
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// eax always returned with childs pid
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// edx is 0 for parent and 1 for child
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ax &= dx - 1;
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}
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return ax;
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#elif defined(__aarch64__)
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int flags = 17; // SIGCHLD
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void *child_stack = 0;
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void *parent_tidptr = 0;
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void *newtls = 0;
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void *child_tidptr = 0;
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register long r0 asm("x0") = (long)flags;
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register long r1 asm("x1") = (long)child_stack;
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register long r2 asm("x2") = (long)parent_tidptr;
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register long r3 asm("x3") = (long)newtls;
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register long r4 asm("x4") = (long)child_tidptr;
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register int res_x0 asm("x0");
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register int res_x1 asm("x1");
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asm volatile("mov\tx8,%2\n\t"
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"mov\tx16,%3\n\t"
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"svc\t0"
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: "=r"(res_x0), "=r"(res_x1)
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: "i"(220), "i"(2), "r"(r0), "r"(r1), "r"(r2), "r"(r3), "r"(r4)
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: "x8", "x16", "memory");
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if (IsXnu() && res_x0 != -1) {
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res_x0 &= res_x1 - 1;
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}
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return _sysret(res_x0);
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#else
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return enosys();
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#endif
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}
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