mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 06:53:33 +00:00
db0d8dd806
The "no modify self" variant of Actually Portable Executable is now
supported on all platforms. If you use `$(APE_NO_MODIFY_SELF)` then
ld.bfd will embed a 4096 byte ELF binary and a 4096 byte Macho file
which are installed on the fly to ${TMPDIR:-/tmp}, which enables us
launch the executable, without needing to copy the whole executable
To prevent it from copying a tiny executable to your temp directory
you need to install the `ape` command (renamed from ape-loader), to
a system path. For example:
# FreeBSD / NetBSD / OpenBSD
make -j8 o//ape/ape
cp o//ape/ape /usr/bin/ape
# Mac OS
# make -j8 o//ape/ape.macho
curl https://justine.lol/ape.macho >/usr/bin/ape
chmod +x /usr/bin/ape
On Linux you can get even more performance with the new binfmt_misc
support which makes launching non-modifying APE binaries as fast as
launching ELF executables. Running the following command:
# Linux
ape/apeinstall.sh
Will copy APE loader to /usr/bin/ape and register with binfmt_misc
Lastly, this change also fixes a really interesting race condition
with OpenBSD thread joining.
127 lines
4.4 KiB
ArmAsm
127 lines
4.4 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
|
│vi: set et ft=asm ts=8 tw=8 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 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/macho.internal.h"
|
|
#include "libc/sysv/consts/prot.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/macros.internal.h"
|
|
|
|
// APE Loader Executable Structure for XNU
|
|
|
|
.align 4096
|
|
macho: .long 0xFEEDFACE+1
|
|
.long MAC_CPU_NEXGEN32E
|
|
.long MAC_CPU_NEXGEN32E_ALL
|
|
.long MAC_EXECUTE
|
|
.long 5 # number of load commands
|
|
.long 60f-10f # size of all load commands
|
|
.long MAC_NOUNDEFS # flags
|
|
.long 0 # reserved
|
|
10: .long MAC_LC_SEGMENT_64
|
|
.long 20f-10b # unmaps first page dir
|
|
.ascin "__PAGEZERO",16 # consistent with linux
|
|
.quad 0,0x200000,0,0 # which forbids mem <2m
|
|
.long 0,0,0,0
|
|
20: .long MAC_LC_SEGMENT_64
|
|
.long 30f-20b
|
|
.ascin "__TEXT",16
|
|
.quad macho # vaddr
|
|
.quad filesz # memsz
|
|
.quad 0 # file offset
|
|
.quad filesz # file size
|
|
.long PROT_EXEC|PROT_READ|PROT_WRITE # maxprot
|
|
.long PROT_EXEC|PROT_READ # initprot
|
|
.long 1 # segment section count
|
|
.long 0 # flags
|
|
210: .ascin "__text",16 # section name (.text)
|
|
.ascin "__TEXT",16
|
|
.quad _start # vaddr
|
|
.quad textsz # memsz
|
|
.long textoff # offset
|
|
.long 3 # align 2**3 = 8
|
|
.long 0 # reloc table offset
|
|
.long 0 # relocation count
|
|
.long MAC_S_ATTR_SOME_INSTRUCTIONS # section type & attributes
|
|
.long 0,0,0 # reserved
|
|
30: .long MAC_LC_SEGMENT_64
|
|
.long 40f-30b
|
|
.ascin "__DATA",16
|
|
.quad bss # vaddr
|
|
.quad bsssize # memsz
|
|
.quad 0 # offset
|
|
.quad 0 # file size
|
|
.long PROT_EXEC|PROT_READ|PROT_WRITE # maxprot
|
|
.long PROT_READ|PROT_WRITE # initprot
|
|
.long 1 # segment section count
|
|
.long 0 # flags
|
|
310: .ascin "__bss",16 # section name (.bss)
|
|
.ascin "__DATA",16
|
|
.quad bss # vaddr
|
|
.quad bsssize # memsz
|
|
.long 0 # offset
|
|
.long 12 # align 2**12 = 4096
|
|
.long 0 # reloc table offset
|
|
.long 0 # relocation count
|
|
.long MAC_S_ZEROFILL # section type & attributes
|
|
.long 0,0,0 # reserved
|
|
40: .long MAC_LC_UUID
|
|
.long 50f-40b
|
|
.quad 0x3fb29ee4ac6c87aa # uuid1
|
|
.quad 0xdd2c9bb866d9eef8 # uuid2
|
|
50: .long MAC_LC_UNIXTHREAD
|
|
.long 60f-50b # cmdsize
|
|
.long MAC_THREAD_NEXGEN32E # flavaflav
|
|
.long (520f-510f)/4 # count
|
|
510: .quad 0 # rax
|
|
.quad 0 # rbx
|
|
.quad 0 # rcx
|
|
.quad XNU # rdx
|
|
.quad 0 # rdi
|
|
.quad 0 # rsi
|
|
.quad 0 # rbp
|
|
.quad 0 # rsp
|
|
.quad 0 # r8
|
|
.quad 0 # r9
|
|
.quad 0 # r10
|
|
.quad 0 # r11
|
|
.quad 0 # r12
|
|
.quad 0 # r13
|
|
.quad 0 # r14
|
|
.quad 0 # r15
|
|
.quad _start # rip
|
|
.quad 0 # rflags
|
|
.quad 0 # cs
|
|
.quad 0 # fs
|
|
.quad 0 # gs
|
|
520:
|
|
60:
|
|
.endobj macho,globl
|
|
|
|
.align 8
|
|
_start: mov %rsp,%rsi
|
|
jmp ApeLoader
|
|
.endfn _start,globl
|
|
|
|
__syscall_loader:
|
|
clc
|
|
syscall
|
|
jc 1f
|
|
ret
|
|
1: neg %rax
|
|
ret
|
|
.endfn __syscall_loader,globl
|