2020-06-16 13:38:43 +00:00
|
|
|
|
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
|
2020-06-15 14:18:57 +00:00
|
|
|
|
│vi: set et ft=asm ts=8 sw=8 fenc=utf-8 :vi│
|
|
|
|
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
|
|
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
|
|
|
|
│ │
|
|
|
|
|
|
│ This program is free software; you can redistribute it and/or modify │
|
|
|
|
|
|
│ it under the terms of the GNU General Public License as published by │
|
|
|
|
|
|
│ the Free Software Foundation; version 2 of the License. │
|
|
|
|
|
|
│ │
|
|
|
|
|
|
│ This program is distributed in the hope that it will be useful, but │
|
|
|
|
|
|
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
|
|
|
|
|
|
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
|
|
|
|
|
|
│ General Public License for more details. │
|
|
|
|
|
|
│ │
|
|
|
|
|
|
│ You should have received a copy of the GNU General Public License │
|
|
|
|
|
|
│ along with this program; if not, write to the Free Software │
|
|
|
|
|
|
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
|
|
|
|
|
│ 02110-1301 USA │
|
|
|
|
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
|
|
|
|
#include "libc/macros.h"
|
|
|
|
|
|
|
|
|
|
|
|
/ Jumps up stack to previous setjmp() invocation.
|
|
|
|
|
|
/
|
|
|
|
|
|
/ This is the same as longjmp() but also unwinds the stack to free
|
|
|
|
|
|
/ memory, etc. that was registered using gc() or defer(). If GC
|
|
|
|
|
|
/ isn't linked, this behaves the same as longjmp().
|
|
|
|
|
|
/
|
|
|
|
|
|
/ @param rdi points to the jmp_buf which must be the same stack
|
|
|
|
|
|
/ @param esi is returned by setjmp() invocation (coerced nonzero)
|
|
|
|
|
|
/ @assume system five nexgen32e abi conformant
|
|
|
|
|
|
/ @see examples/ctrlc.c
|
|
|
|
|
|
/ @noreturn
|
|
|
|
|
|
gclongjmp:
|
|
|
|
|
|
.leafprologue
|
|
|
|
|
|
.profilable
|
2020-08-25 11:23:25 +00:00
|
|
|
|
.weak g_garbage
|
|
|
|
|
|
lea g_garbage(%rip),%r12
|
2020-06-15 14:18:57 +00:00
|
|
|
|
test %r12,%r12
|
|
|
|
|
|
jnz .L.unwind.destructors
|
|
|
|
|
|
0: jmp longjmp
|
|
|
|
|
|
.L.unwind.destructors:
|
|
|
|
|
|
push %rdi
|
|
|
|
|
|
push %rsi
|
|
|
|
|
|
mov (%r12),%r13 # garbage.i
|
|
|
|
|
|
mov 16(%r12),%r14 # garbage.p
|
|
|
|
|
|
mov (%rdi),%r15 # jmp_buf[0] is new %rsp
|
|
|
|
|
|
shl $5,%r13
|
|
|
|
|
|
1: test %r13,%r13
|
|
|
|
|
|
jz 2f
|
|
|
|
|
|
sub $32,%r13
|
|
|
|
|
|
cmp (%r14,%r13),%r15
|
|
|
|
|
|
ja 2f
|
|
|
|
|
|
mov 8(%r14,%r13),%rax # garbage.p[𝑖].fn
|
|
|
|
|
|
mov 16(%r14,%r13),%rdi # garbage.p[𝑖].arg
|
|
|
|
|
|
call *%rax
|
|
|
|
|
|
decq (%r12)
|
|
|
|
|
|
jmp 1b
|
|
|
|
|
|
2: pop %rsi
|
|
|
|
|
|
pop %rdi
|
|
|
|
|
|
jmp 0b
|
|
|
|
|
|
.endfn gclongjmp,globl
|
2020-06-16 02:01:28 +00:00
|
|
|
|
.source __FILE__
|
