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| author | Pasha <pasha@member.fsf.org> | 2024-02-20 18:49:50 +0000 |
|---|---|---|
| committer | Pasha <pasha@member.fsf.org> | 2024-02-20 18:49:50 +0000 |
| commit | 5e0b8d508ed51004bd836384293be00950ee62c9 (patch) | |
| tree | e3f16b1aa8b7177032ce3ec429fbad2b1d92a876 /x86_64/_setjmp.S | |
| download | gnumach-riscv-5e0b8d508ed51004bd836384293be00950ee62c9.tar.gz gnumach-riscv-5e0b8d508ed51004bd836384293be00950ee62c9.tar.bz2 | |
init gnumach copy
Diffstat (limited to 'x86_64/_setjmp.S')
| -rw-r--r-- | x86_64/_setjmp.S | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/x86_64/_setjmp.S b/x86_64/_setjmp.S new file mode 100644 index 0000000..5714f43 --- /dev/null +++ b/x86_64/_setjmp.S @@ -0,0 +1,65 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * C library -- _setjmp, _longjmp + * + * _longjmp(a,v) + * will generate a "return(v)" from + * the last call to + * _setjmp(a) + * by restoring registers from the stack, + * The previous signal state is NOT restored. + * + */ + +#include <mach/machine/asm.h> + +ENTRY(_setjmp) + movq %rbx,0(%rdi) + movq %rbp,8(%rdi) /* save frame pointer of caller */ + movq %r12,16(%rdi) + movq %r13,24(%rdi) + movq %r14,32(%rdi) + movq %r15,40(%rdi) + popq %rdx + movq %rsp,48(%rdi) /* save stack pointer of caller */ + movq %rdx,56(%rdi) /* save pc of caller */ + xorq %rax,%rax + jmp *%rdx + +ENTRY(_longjmp) + movq %rsi,%rax /* return(v) */ + movq 0(%rdi),%rbx + movq 8(%rdi),%rbp + movq 16(%rdi),%r12 + movq 24(%rdi),%r13 + movq 32(%rdi),%r14 + movq 40(%rdi),%r15 + movq 48(%rdi),%rsp + orq %rax,%rax + jnz 0f + incq %rax +0: jmp *56(%rdi) /* done, return.... */ |