mirror of
https://github.com/jart/cosmopolitan.git
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3d172c99fe
This version has better error messages and safety checks. It supports loading static position-independent executables. It correctly handles more kinds of weird ELF program header layouts. A force flag has been added to avoid system execve(). Finally the longstanding misalignment with our ELF PT_NOTE section has been addressed.
95 lines
3.7 KiB
ArmAsm
95 lines
3.7 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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/macho.internal.h"
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#include "libc/sysv/consts/prot.h"
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#include "libc/dce.h"
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#include "libc/macros.internal.h"
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// Apple Mach-O Executable Headers
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// Fixups are applied by objbincopy.com
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// There must exist a MAC_LC_SEGMENT_64 for every PT_LOAD
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.section .macho,"a",@progbits
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.balign 64
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.long 0xFEEDFACE+1
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.long MAC_CPU_NEXGEN32E
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.long MAC_CPU_NEXGEN32E_ALL
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.long MAC_EXECUTE
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.long 5 // number of load commands
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.long 60f-10f // size of all load commands
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.long MAC_NOUNDEFS|MAC_SPLIT_SEGS // flags
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.long 0 // reserved
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10: .long MAC_LC_SEGMENT_64
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.long 20f-10b // unmaps first page dir
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.ascin "__PAGEZERO",16 // consistent with linux
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.quad 0,0x200000,0,0 // which forbids mem <2m
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.long 0,0,0,0
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20: .long MAC_LC_SEGMENT_64
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.long 30f-20b
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.ascin "__TEXT",16
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.quad 0 // vaddr
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.quad 0 // memsz
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.quad 0 // file offset
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.quad 0 // file size
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.long 0 // maxprot
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.long 0 // initprot
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.long 0 // segment section count
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.long 0 // flags
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30: .long MAC_LC_SEGMENT_64
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.long 40f-30b
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.ascin "__RODATA",16
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.quad 0 // vaddr
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.quad 0 // memsz
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.quad 0 // file offset
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.quad 0 // file size
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.long 0 // maxprot
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.long 0 // initprot
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.long 0 // segment section count
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.long 0 // flags
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40: .long MAC_LC_UUID
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.long 50f-40b
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.quad 0x4527148ba7a513ef // uuid1
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.quad 0x56fa865940665e8f // uuid2
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50: .long MAC_LC_UNIXTHREAD
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.long 60f-50b // cmdsize
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.long MAC_THREAD_NEXGEN32E // flavaflav
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.long (520f-510f)/4 // count
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510: .quad 0 // rax
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.quad 0 // rbx
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.quad 0 // rcx
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.quad 0 // rdx
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.quad 0 // rdi
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.quad 0 // rsi
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.quad 0 // rbp
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.quad 0 // rsp
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.quad 0 // r8
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.quad 0 // r9
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.quad 0 // r10
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.quad 0 // r11
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.quad 0 // r12
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.quad 0 // r13
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.quad 0 // r14
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.quad 0 // r15
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.quad XnuEntrypoint // rip
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.quad 0 // rflags
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.quad 0 // cs
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.quad 0 // fs
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.quad 0 // gs
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520:
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60:
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