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https://github.com/jart/cosmopolitan.git
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6ab01716ce
We now store values in jmp_buf where the compiler wants them to be. This fixes code that calls __builtin_setjmp() and __builtin_longjmp() such as libunwind. All libcxxabi tests are now passing on ARM64. See #1076
66 lines
2.7 KiB
ArmAsm
66 lines
2.7 KiB
ArmAsm
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
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│ vi: set noet ft=asm ts=8 sw=8 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/macros.internal.h"
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// Saves cpu state.
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//
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// @param rdi points to jmp_buf
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// @return rax 0 when set and !0 when longjmp'd
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// @returnstwice
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// @assume system five nexgen32e abi conformant
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// @note code built w/ microsoft abi compiler can't call this
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// @see longjmp(), gclongjmp()
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.ftrace1
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setjmp:
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.ftrace2
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_setjmp:
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#ifdef __x86_64__
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lea 8(%rsp),%rax
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mov %rax,(%rdi)
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mov %rbx,8(%rdi)
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mov %rbp,16(%rdi)
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mov %r12,24(%rdi)
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mov %r13,32(%rdi)
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mov %r14,40(%rdi)
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mov %r15,48(%rdi)
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mov (%rsp),%rax
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mov %rax,56(%rdi)
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xor %eax,%eax
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ret
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#elif defined(__aarch64__)
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mov x2,sp
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stp x29,x30,[x0,#0]
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stp x2,x22,[x0,#16]
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stp x23,x24,[x0,#32]
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stp x25,x26,[x0,#48]
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stp x27,x28,[x0,#64]
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stp x19,x20,[x0,#80]
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str x21,[x0,#104]
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stp d8,d9,[x0,#112]
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stp d10,d11,[x0,#128]
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stp d12,d13,[x0,#144]
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stp d14,d15,[x0,#160]
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mov x0,#0
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ret
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#else
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#error "unsupported architecture"
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#endif
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.endfn _setjmp,globl
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.endfn setjmp,globl
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