| /*- |
| * 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. |
| */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| .asciz "@(#)_setjmp.s 5.1 (Berkeley) 4/23/90" |
| #endif /* LIBC_SCCS and not lint */ |
| #include <machine/asm.h> |
| __FBSDID("$FreeBSD$"); |
| |
| /* |
| * C library -- _setjmp, _longjmp |
| * |
| * _longjmp(a,v) |
| * will generate a "return(v)" from the last call to |
| * _setjmp(a) |
| * by restoring registers from the environment 'a'. |
| * The previous signal state is NOT restored. |
| */ |
| |
| ENTRY(_setjmp) |
| movq %rdi,%rax |
| movq 0(%rsp),%rdx /* retval */ |
| movq %rdx, 0(%rax) /* 0; retval */ |
| movq %rbx, 8(%rax) /* 1; rbx */ |
| movq %rsp,16(%rax) /* 2; rsp */ |
| movq %rbp,24(%rax) /* 3; rbp */ |
| movq %r12,32(%rax) /* 4; r12 */ |
| movq %r13,40(%rax) /* 5; r13 */ |
| movq %r14,48(%rax) /* 6; r14 */ |
| movq %r15,56(%rax) /* 7; r15 */ |
| fnstcw 64(%rax) /* 8; fpu cw */ |
| stmxcsr 68(%rax) /* and mxcsr */ |
| xorq %rax,%rax |
| ret |
| END(_setjmp) |
| |
| .weak CNAME(_longjmp) |
| ENTRY(_longjmp) |
| movq %rdi,%rdx |
| /* Restore the mxcsr, but leave exception flags intact. */ |
| stmxcsr -4(%rsp) |
| movl 68(%rdx),%eax |
| andl $0xffffffc0,%eax |
| movl -4(%rsp),%edi |
| andl $0x3f,%edi |
| xorl %eax,%edi |
| movl %edi,-4(%rsp) |
| ldmxcsr -4(%rsp) |
| 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 |
| fldcw 64(%rdx) |
| testq %rax,%rax |
| jnz 1f |
| incq %rax |
| 1: movq %rcx,0(%rsp) |
| ret |
| END(_longjmp) |