mirror of
https://github.com/jart/cosmopolitan.git
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2ab9e9f7fd
- Introduce portable sched_getcpu() api - Support GCC's __target_clones__ feature - Make fma() go faster on x86 in default mode - Remove some asan checks from core libraries - WinMain() now ensures $HOME and $USER are defined
85 lines
4.4 KiB
C
85 lines
4.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ This is free and unencumbered software released into the public domain. │
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│ │
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│ Anyone is free to copy, modify, publish, use, compile, sell, or │
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│ distribute this software, either in source code form or as a compiled │
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│ binary, for any purpose, commercial or non-commercial, and by any │
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│ means. │
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│ │
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│ In jurisdictions that recognize copyright laws, the author or authors │
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│ of this software dedicate any and all copyright interest in the │
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│ software to the public domain. We make this dedication for the benefit │
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│ of the public at large and to the detriment of our heirs and │
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│ successors. We intend this dedication to be an overt act of │
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│ relinquishment in perpetuity of all present and future rights to this │
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│ software under copyright law. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
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│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
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│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
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│ OTHER DEALINGS IN THE SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "ape/relocations.h"
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#include "ape/sections.internal.h"
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#include "libc/assert.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/metalfile.internal.h"
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#include "libc/intrin/directmap.internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/intrin/weaken.h"
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#include "libc/macros.internal.h"
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#include "libc/mem/mem.h"
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#include "libc/runtime/pc.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/sysv/errfuns.h"
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#ifdef __x86_64__
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#define MAP_ANONYMOUS_linux 0x00000020
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#define MAP_FIXED_linux 0x00000010
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#define MAP_SHARED_linux 0x00000001
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__static_yoink("_init_metalfile");
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void *__ape_com_base;
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size_t __ape_com_size = 0;
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textstartup void InitializeMetalFile(void) {
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if (IsMetal()) {
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/*
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* Copy out a pristine image of the program — before the program might
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* decide to modify its own .data section.
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*
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* This code is included if a symbol "file:/proc/self/exe" is defined
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* (see libc/calls/metalfile.internal.h & libc/calls/metalfile_init.S).
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* The zipos code will automatically arrange to do this. Alternatively,
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* user code can __static_yoink this symbol.
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*/
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size_t size = ROUNDUP(_ezip - __executable_start, 4096);
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// TODO(jart): Restore support for ZIPOS on metal.
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void *copied_base;
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struct DirectMap dm;
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dm = sys_mmap_metal(NULL, size, PROT_READ | PROT_WRITE,
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MAP_SHARED_linux | MAP_ANONYMOUS_linux, -1, 0);
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copied_base = dm.addr;
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npassert(copied_base != (void *)-1);
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memcpy(copied_base, (void *)(BANE + IMAGE_BASE_PHYSICAL), size);
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__ape_com_base = copied_base;
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__ape_com_size = size;
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// TODO(tkchia): LIBC_CALLS doesn't depend on LIBC_VGA so references
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// to its functions need to be weak
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// KINFOF("%s @ %p,+%#zx", APE_COM_NAME, copied_base, size);
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}
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}
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#endif /* __x86_64__ */
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