/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved * * HISTORY * 20-Apr-92 Bruce Martin (bmartin@next.com) * Created from M68K sources. */ /* * 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 <architecture/i386/asm_help.h> #define JB_RBX 0 #define JB_RBP 8 #define JB_RSP 16 #define JB_R12 24 #define JB_R13 32 #define JB_R14 40 #define JB_R15 48 #define JB_RIP 56 #define JB_RFLAGS 64 #define JB_MXCSR 72 #define JB_FPCONTROL 76 #define JB_MASK 80 LEAF(__setjmp, 0) // %rdi is a jmp_buf (struct sigcontext *) // now build sigcontext movq %rbx, JB_RBX(%rdi) movq %rbp, JB_RBP(%rdi) movq %r12, JB_R12(%rdi) movq %r13, JB_R13(%rdi) movq %r14, JB_R14(%rdi) movq %r15, JB_R15(%rdi) // RIP is set to the frame return address value movq (%rsp), %rax movq %rax, JB_RIP(%rdi) // RSP is set to the frame return address plus 8 leaq 8(%rsp), %rax movq %rax, JB_RSP(%rdi) // save fp control word fnstcw JB_FPCONTROL(%rdi) // save MXCSR stmxcsr JB_MXCSR(%rdi) // return 0 xorl %eax, %eax ret LEAF(__longjmp, 0) fninit // Clear all FP exceptions // %rdi is a jmp_buf (struct sigcontext *) // %esi is the return value movl %esi, %eax testl %esi, %esi jnz 1f incl %eax // general registers 1: movq JB_RBX(%rdi), %rbx movq JB_RBP(%rdi), %rbp movq JB_RSP(%rdi), %rsp movq JB_R12(%rdi), %r12 movq JB_R13(%rdi), %r13 movq JB_R14(%rdi), %r14 movq JB_R15(%rdi), %r15 // restore FP control word fldcw JB_FPCONTROL(%rdi) // restore MXCSR ldmxcsr JB_MXCSR(%rdi) // Make sure DF is reset cld jmp *JB_RIP(%rdi)