diff options
Diffstat (limited to 'lib/libc/amd64/gen/sigsetjmp.S')
| -rw-r--r-- | lib/libc/amd64/gen/sigsetjmp.S | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/lib/libc/amd64/gen/sigsetjmp.S b/lib/libc/amd64/gen/sigsetjmp.S new file mode 100644 index 0000000..ef90bc6 --- /dev/null +++ b/lib/libc/amd64/gen/sigsetjmp.S @@ -0,0 +1,118 @@ +/*- + * Copyright (c) 1990 The Regents of the University of California. + * All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * William Jolitz. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)setjmp.s 5.1 (Berkeley) 4/23/90" + */ + +#if defined(LIBC_SCCS) && !defined(lint) + .text + .asciz "$Id: sigsetjmp.S,v 1.1 1993/12/05 13:01:05 ats Exp $" +#endif /* LIBC_SCCS and not lint */ +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +#include "SYS.h" + +/*- + * TODO: + * Rename sigsetjmp to __sigsetjmp and siglongjmp to __siglongjmp, + * remove the other *jmp functions and define everything in terms + * of the renamed functions. This requires compiler support for + * the renamed functions (introduced in gcc-2.5.3; previous versions + * only supported *jmp with 0 or 1 leading underscores). + * + * Restore _all_ the registers and the signal mask atomically. Can + * use sigreturn() if sigreturn() works. + */ + +ENTRY(sigsetjmp) + movl %esi,88(%rdi) /* 11; savemask */ + testl %esi,%esi + jz 2f + pushq %rdi + movq %rdi,%rcx + movq $1,%rdi /* SIG_BLOCK */ + movq $0,%rsi /* (sigset_t*)set */ + leaq 72(%rcx),%rdx /* 9,10 (sigset_t*)oset */ + /* stack is 16-byte aligned */ + call PIC_PLT(CNAME(_sigprocmask)) + popq %rdi +2: movq %rdi,%rcx + movq 0(%rsp),%rdx /* retval */ + movq %rdx, 0(%rcx) /* 0; retval */ + movq %rbx, 8(%rcx) /* 1; rbx */ + movq %rsp,16(%rcx) /* 2; rsp */ + movq %rbp,24(%rcx) /* 3; rbp */ + movq %r12,32(%rcx) /* 4; r12 */ + movq %r13,40(%rcx) /* 5; r13 */ + movq %r14,48(%rcx) /* 6; r14 */ + movq %r15,56(%rcx) /* 7; r15 */ + fnstcw 64(%rcx) /* 8; fpu cw */ + xorq %rax,%rax + ret +END(sigsetjmp) + + .weak CNAME(siglongjmp) + .set CNAME(siglongjmp),CNAME(__siglongjmp) +ENTRY(__siglongjmp) + cmpl $0,88(%rdi) + jz 2f + movq %rdi,%rdx + pushq %rdi + pushq %rsi + movq $3,%rdi /* SIG_SETMASK */ + leaq 72(%rdx),%rsi /* (sigset_t*)set */ + movq $0,%rdx /* (sigset_t*)oset */ + subq $0x8,%rsp /* make the stack 16-byte aligned */ + call PIC_PLT(CNAME(_sigprocmask)) + addq $0x8,%rsp + popq %rsi + popq %rdi /* jmpbuf */ +2: movq %rdi,%rdx + movq %rsi,%rax /* retval */ + movq 0(%rdx),%rcx + movq 8(%rdx),%rbx + movq 16(%rdx),%rsp + movq 24(%rdx),%rbp + movq 32(%rdx),%r12 + movq 40(%rdx),%r13 + movq 48(%rdx),%r14 + movq 56(%rdx),%r15 + fninit + fldcw 64(%rdx) + testq %rax,%rax + jnz 1f + incq %rax +1: movq %rcx,0(%rsp) + ret +END(__siglongjmp) + + .section .note.GNU-stack,"",%progbits |
