linux64.h revision 107590
1275970Scy/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format. 2275970Scy Copyright (C) 2001, 2002 Free Software Foundation, Inc. 3275970Scy Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h. 4275970Scy 5275970ScyThis file is part of GNU CC. 6275970Scy 7275970ScyGNU CC is free software; you can redistribute it and/or modify 8275970Scyit under the terms of the GNU General Public License as published by 9275970Scythe Free Software Foundation; either version 2, or (at your option) 10275970Scyany later version. 11275970Scy 12275970ScyGNU CC is distributed in the hope that it will be useful, 13275970Scybut WITHOUT ANY WARRANTY; without even the implied warranty of 14275970ScyMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15275970ScyGNU General Public License for more details. 16275970Scy 17275970ScyYou should have received a copy of the GNU General Public License 18275970Scyalong with GNU CC; see the file COPYING. If not, write to 19275970Scythe Free Software Foundation, 59 Temple Place - Suite 330, 20275970ScyBoston, MA 02111-1307, USA. */ 21275970Scy 22275970Scy#define LINUX_DEFAULT_ELF 23275970Scy 24275970Scy#undef TARGET_VERSION 25275970Scy#define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)"); 26275970Scy 27275970Scy#undef CPP_PREDEFINES 28275970Scy#define CPP_PREDEFINES "-D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -Asystem(posix)" 29275970Scy 30275970Scy#undef CPP_SPEC 31275970Scy#define CPP_SPEC "%(cpp_cpu) %{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT} %{!m32:-D__LONG_MAX__=9223372036854775807L}" 32275970Scy 33275970Scy/* The svr4 ABI for the i386 says that records and unions are returned 34275970Scy in memory. In the 64bit compilation we will turn this flag off in 35275970Scy override_options, as we never do pcc_struct_return scheme on this target. */ 36275970Scy#undef DEFAULT_PCC_STRUCT_RETURN 37275970Scy#define DEFAULT_PCC_STRUCT_RETURN 1 38275970Scy 39275970Scy/* Provide a LINK_SPEC. Here we provide support for the special GCC 40275970Scy options -static and -shared, which allow us to link things in one 41275970Scy of these three modes by applying the appropriate combinations of 42275970Scy options at link-time. 43275970Scy 44275970Scy When the -shared link option is used a final link is not being 45275970Scy done. */ 46275970Scy 47#undef LINK_SPEC 48#define LINK_SPEC "%{!m32:-m elf_x86_64 -Y P,/usr/lib64} %{m32:-m elf_i386} \ 49 %{shared:-shared} \ 50 %{!shared: \ 51 %{!static: \ 52 %{rdynamic:-export-dynamic} \ 53 %{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \ 54 %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \ 55 %{static:-static}}" 56 57#undef STARTFILE_SPEC 58#define STARTFILE_SPEC \ 59 "%{!shared: \ 60 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \ 61 %{!p:%{profile:gcrt1.o%s} %{!profile:crt1.o%s}}}} \ 62 crti.o%s %{static:crtbeginT.o%s} \ 63 %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}" 64 65#undef ENDFILE_SPEC 66#define ENDFILE_SPEC "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s" 67 68#define MULTILIB_DEFAULTS { "m64" } 69 70/* Do code reading to identify a signal frame, and set the frame 71 state data appropriately. See unwind-dw2.c for the structs. 72 Don't use this at all if inhibit_libc is used. */ 73 74#ifndef inhibit_libc 75#ifdef IN_LIBGCC2 76#include <signal.h> 77#include <sys/ucontext.h> 78#endif 79 80#ifdef __x86_64__ 81#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ 82 do { \ 83 unsigned char *pc_ = (CONTEXT)->ra; \ 84 struct sigcontext *sc_; \ 85 long new_cfa_; \ 86 \ 87 /* movq __NR_rt_sigreturn, %rax ; syscall */ \ 88 if (*(unsigned char *)(pc_+0) == 0x48 \ 89 && *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7) \ 90 { \ 91 struct ucontext *uc_ = (CONTEXT)->cfa; \ 92 sc_ = (struct sigcontext *) &uc_->uc_mcontext; \ 93 } \ 94 else \ 95 break; \ 96 \ 97 new_cfa_ = sc_->rsp; \ 98 (FS)->cfa_how = CFA_REG_OFFSET; \ 99 /* Register 7 is rsp */ \ 100 (FS)->cfa_reg = 7; \ 101 (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ 102 \ 103 /* The SVR4 register numbering macros aren't usable in libgcc. */ \ 104 (FS)->regs.reg[0].how = REG_SAVED_OFFSET; \ 105 (FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_; \ 106 (FS)->regs.reg[1].how = REG_SAVED_OFFSET; \ 107 (FS)->regs.reg[1].loc.offset = (long)&sc_->rbx - new_cfa_; \ 108 (FS)->regs.reg[2].how = REG_SAVED_OFFSET; \ 109 (FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_; \ 110 (FS)->regs.reg[3].how = REG_SAVED_OFFSET; \ 111 (FS)->regs.reg[3].loc.offset = (long)&sc_->rdx - new_cfa_; \ 112 (FS)->regs.reg[4].how = REG_SAVED_OFFSET; \ 113 (FS)->regs.reg[4].loc.offset = (long)&sc_->rbp - new_cfa_; \ 114 (FS)->regs.reg[5].how = REG_SAVED_OFFSET; \ 115 (FS)->regs.reg[5].loc.offset = (long)&sc_->rsi - new_cfa_; \ 116 (FS)->regs.reg[6].how = REG_SAVED_OFFSET; \ 117 (FS)->regs.reg[6].loc.offset = (long)&sc_->rdi - new_cfa_; \ 118 (FS)->regs.reg[8].how = REG_SAVED_OFFSET; \ 119 (FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_; \ 120 (FS)->regs.reg[9].how = REG_SAVED_OFFSET; \ 121 (FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_; \ 122 (FS)->regs.reg[10].how = REG_SAVED_OFFSET; \ 123 (FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_; \ 124 (FS)->regs.reg[11].how = REG_SAVED_OFFSET; \ 125 (FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_; \ 126 (FS)->regs.reg[12].how = REG_SAVED_OFFSET; \ 127 (FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_; \ 128 (FS)->regs.reg[13].how = REG_SAVED_OFFSET; \ 129 (FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_; \ 130 (FS)->regs.reg[14].how = REG_SAVED_OFFSET; \ 131 (FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_; \ 132 (FS)->regs.reg[15].how = REG_SAVED_OFFSET; \ 133 (FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_; \ 134 (FS)->retaddr_column = 16; \ 135 goto SUCCESS; \ 136 } while (0) 137#else /* ifdef __x86_64__ */ 138#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \ 139 do { \ 140 unsigned char *pc_ = (CONTEXT)->ra; \ 141 struct sigcontext *sc_; \ 142 long new_cfa_; \ 143 \ 144 /* popl %eax ; movl $__NR_sigreturn,%eax ; int $0x80 */ \ 145 if (*(unsigned short *)(pc_+0) == 0xb858 \ 146 && *(unsigned int *)(pc_+2) == 119 \ 147 && *(unsigned short *)(pc_+6) == 0x80cd) \ 148 sc_ = (CONTEXT)->cfa + 4; \ 149 /* movl $__NR_rt_sigreturn,%eax ; int $0x80 */ \ 150 else if (*(unsigned char *)(pc_+0) == 0xb8 \ 151 && *(unsigned int *)(pc_+1) == 173 \ 152 && *(unsigned short *)(pc_+5) == 0x80cd) \ 153 { \ 154 struct rt_sigframe { \ 155 int sig; \ 156 struct siginfo *pinfo; \ 157 void *puc; \ 158 struct siginfo info; \ 159 struct ucontext uc; \ 160 } *rt_ = (CONTEXT)->cfa; \ 161 sc_ = (struct sigcontext *) &rt_->uc.uc_mcontext; \ 162 } \ 163 else \ 164 break; \ 165 \ 166 new_cfa_ = sc_->esp; \ 167 (FS)->cfa_how = CFA_REG_OFFSET; \ 168 (FS)->cfa_reg = 4; \ 169 (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \ 170 \ 171 /* The SVR4 register numbering macros aren't usable in libgcc. */ \ 172 (FS)->regs.reg[0].how = REG_SAVED_OFFSET; \ 173 (FS)->regs.reg[0].loc.offset = (long)&sc_->eax - new_cfa_; \ 174 (FS)->regs.reg[3].how = REG_SAVED_OFFSET; \ 175 (FS)->regs.reg[3].loc.offset = (long)&sc_->ebx - new_cfa_; \ 176 (FS)->regs.reg[1].how = REG_SAVED_OFFSET; \ 177 (FS)->regs.reg[1].loc.offset = (long)&sc_->ecx - new_cfa_; \ 178 (FS)->regs.reg[2].how = REG_SAVED_OFFSET; \ 179 (FS)->regs.reg[2].loc.offset = (long)&sc_->edx - new_cfa_; \ 180 (FS)->regs.reg[6].how = REG_SAVED_OFFSET; \ 181 (FS)->regs.reg[6].loc.offset = (long)&sc_->esi - new_cfa_; \ 182 (FS)->regs.reg[7].how = REG_SAVED_OFFSET; \ 183 (FS)->regs.reg[7].loc.offset = (long)&sc_->edi - new_cfa_; \ 184 (FS)->regs.reg[5].how = REG_SAVED_OFFSET; \ 185 (FS)->regs.reg[5].loc.offset = (long)&sc_->ebp - new_cfa_; \ 186 (FS)->regs.reg[8].how = REG_SAVED_OFFSET; \ 187 (FS)->regs.reg[8].loc.offset = (long)&sc_->eip - new_cfa_; \ 188 (FS)->retaddr_column = 8; \ 189 goto SUCCESS; \ 190 } while (0) 191#endif /* ifdef __x86_64__ */ 192#endif /* ifdef inhibit_libc */ 193