cosmopolitan/libc/nexgen32e/nt2sysv.S
Justine Tunney ec2cb88058 Make fixes and improvements
- Document more compiler flags
- Expose new __print_maps() api
- Better overflow checking in mmap()
- Improve the shell example somewhat
- Fix minor runtime bugs regarding stacks
- Make kill() on fork()+execve()'d children work
- Support CLONE_CHILD_CLEARTID for proper joining
- Fix recent possible deadlock regression with --ftrace
2022-05-19 16:57:49 -07:00

58 lines
2.6 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 2020 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/macros.internal.h"
.text.windows
// Translates function call from code built w/ MS-style compiler.
//
// This wraps WinMain() and callback functions passed to Win32 API.
// Please note an intermediary jump slot is needed to set %rax.
//
// @param %rax is function address
// @param %rcx,%rdx,%r8,%r9
// @return %rax,%xmm0
// @note slower than __sysv2nt
// @see NT2SYSV() macro
__nt2sysv:
push %rbp
mov %rsp,%rbp
// TODO(jart): We should probably find some way to use our own
// stack when Windows delivers signals ;_;
.profilable
sub $0x100,%rsp
push %rbx
push %rdi
push %rsi
pushf # TODO(jart): Do we need it?
lea -0x80(%rbp),%rdi
call _savexmm
mov %rcx,%rdi
mov %rdx,%rsi
mov %r8,%rdx
mov %r9,%rcx
call *%rax
lea -0x80(%rbp),%rdi
call _loadxmm
popf
pop %rsi
pop %rdi
pop %rbx
leave
ret
.endfn __nt2sysv,globl,hidden