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.
80 lines
3.9 KiB
C
80 lines
3.9 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 2020 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/errno.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/directmap.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/runtime.h"
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#include "libc/runtime/memtrack.internal.h"
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/**
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* Obtains memory mapping directly from system.
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*
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* The mmap() function needs to track memory mappings in order to
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* support Windows NT and Address Sanitizer. That memory tracking can be
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* bypassed by calling this function. However the caller is responsible
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* for passing the magic memory handle on Windows NT to CloseHandle().
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*
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* @asyncsignalsafe
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* @threadsafe
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*/
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struct DirectMap sys_mmap(void *addr, size_t size, int prot, int flags, int fd,
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int64_t off) {
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#ifdef __x86_64__
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struct DirectMap d;
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if (!IsWindows() && !IsMetal()) {
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d.addr = __sys_mmap(addr, size, prot, flags, fd, off, off);
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d.maphandle = kNtInvalidHandleValue;
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} else if (IsMetal()) {
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d = sys_mmap_metal(addr, size, prot, flags, fd, off);
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} else {
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d = sys_mmap_nt(addr, size, prot, flags, fd, off);
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}
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KERNTRACE("sys_mmap(%.12p /* %s */, %'zu, %s, %s, %d, %'ld) → {%.12p, %p}% m",
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addr, DescribeFrame((intptr_t)addr >> 16), size,
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DescribeProtFlags(prot), DescribeMapFlags(flags), fd, off, d.addr,
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d.maphandle);
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return d;
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#elif defined(__aarch64__)
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register long r0 asm("x0") = (long)addr;
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register long r1 asm("x1") = (long)size;
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register long r2 asm("x2") = (long)prot;
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register long r3 asm("x3") = (long)flags;
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register long r4 asm("x4") = (long)fd;
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register long r5 asm("x5") = (long)off;
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register long res_x0 asm("x0");
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long res;
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asm volatile("mov\tx8,%1\n\t"
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"mov\tx16,%2\n\t"
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"svc\t0"
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: "=r"(res_x0)
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: "i"(222), "i"(197), "r"(r0), "r"(r1), "r"(r2), "r"(r3),
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"r"(r4), "r"(r5)
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: "x8", "memory");
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res = res_x0;
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if ((unsigned long)res >= (unsigned long)-4095) {
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errno = (int)-res;
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res = -1;
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}
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return (struct DirectMap){(void *)res, kNtInvalidHandleValue};
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#else
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#error "arch unsupported"
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#endif
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}
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