linux64.h revision 96263 
1/* Definitions for AMD x86-64 running Linux-based GNU systems with ELF format.
2   Copyright (C) 2001, 2002 Free Software Foundation, Inc.
3   Contributed by Jan Hubicka <jh@suse.cz>, based on linux.h.
4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING.  If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.  */
21
22#define LINUX_DEFAULT_ELF
23
24#undef TARGET_VERSION
25#define TARGET_VERSION fprintf (stderr, " (x86-64 Linux/ELF)");
26
27#undef CPP_PREDEFINES
28#define CPP_PREDEFINES "-D__ELF__ -Dunix -D__gnu_linux__ -Dlinux -Asystem(posix)"
29
30#undef CPP_SPEC
31#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}"
32
33/* Provide a LINK_SPEC.  Here we provide support for the special GCC
34   options -static and -shared, which allow us to link things in one
35   of these three modes by applying the appropriate combinations of
36   options at link-time.
37
38   When the -shared link option is used a final link is not being
39   done.  */
40
41#undef	LINK_SPEC
42#define LINK_SPEC "%{!m32:-m elf_x86_64 -Y P,/usr/lib64} %{m32:-m elf_i386} \
43  %{shared:-shared} \
44  %{!shared: \
45    %{!static: \
46      %{rdynamic:-export-dynamic} \
47      %{m32:%{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
48      %{!m32:%{!dynamic-linker:-dynamic-linker /lib64/ld-linux-x86-64.so.2}}} \
49    %{static:-static}}"
50
51#undef  STARTFILE_SPEC
52#define STARTFILE_SPEC \
53  "%{m32:%{!shared: \
54       %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
55       %{!p:%{profile:gcrt1.o%s} %{!profile:crt1.o%s}}}} \
56     crti.o%s %{static:crtbeginT.o%s}\
57     %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}} \
58   %{!m32:%{!shared: \
59       %{pg:/usr/lib64/gcrt1.o%s} %{!pg:%{p:/usr/lib64/gcrt1.o%s} \
60       %{!p:%{profile:/usr/lib64/gcrt1.o%s} %{!profile:/usr/lib64/crt1.o%s}}}}\
61     /usr/lib64/crti.o%s %{static:crtbeginT.o%s} \
62     %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}}"
63
64#undef  ENDFILE_SPEC
65#define ENDFILE_SPEC "\
66  %{m32:%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s} \
67  %{!m32:%{!shared:crtend.o%s} %{shared:crtendS.o%s} /usr/lib64/crtn.o%s}"
68
69#define MULTILIB_DEFAULTS { "m64" }
70
71/* Do code reading to identify a signal frame, and set the frame
72   state data appropriately.  See unwind-dw2.c for the structs.  */
73
74#ifdef IN_LIBGCC2
75#include <signal.h>
76#include <sys/ucontext.h>
77#endif
78
79#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)		\
80  do {									\
81    unsigned char *pc_ = (CONTEXT)->ra;					\
82    struct sigcontext *sc_;						\
83    long new_cfa_;							\
84									\
85    /* movq __NR_rt_sigreturn, %rax ; syscall  */			\
86    if (*(unsigned char *)(pc_+0) == 0x48				\
87	&& *(unsigned long *)(pc_+1) == 0x050f0000000fc0c7)		\
88      {									\
89	struct ucontext *uc_ = (CONTEXT)->cfa;				\
90	sc_ = (struct sigcontext *) &uc_->uc_mcontext;			\
91      }									\
92    else								\
93      break;								\
94									\
95    new_cfa_ = sc_->rsp;						\
96    (FS)->cfa_how = CFA_REG_OFFSET;					\
97    /* Register 7 is rsp  */						\
98    (FS)->cfa_reg = 7;							\
99    (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa;		\
100									\
101    /* The SVR4 register numbering macros aren't usable in libgcc.  */	\
102    (FS)->regs.reg[0].how = REG_SAVED_OFFSET;				\
103    (FS)->regs.reg[0].loc.offset = (long)&sc_->rax - new_cfa_;		\
104    (FS)->regs.reg[1].how = REG_SAVED_OFFSET;				\
105    (FS)->regs.reg[1].loc.offset = (long)&sc_->rbx - new_cfa_;		\
106    (FS)->regs.reg[2].how = REG_SAVED_OFFSET;				\
107    (FS)->regs.reg[2].loc.offset = (long)&sc_->rcx - new_cfa_;		\
108    (FS)->regs.reg[3].how = REG_SAVED_OFFSET;				\
109    (FS)->regs.reg[3].loc.offset = (long)&sc_->rdx - new_cfa_;		\
110    (FS)->regs.reg[4].how = REG_SAVED_OFFSET;				\
111    (FS)->regs.reg[4].loc.offset = (long)&sc_->rbp - new_cfa_;		\
112    (FS)->regs.reg[5].how = REG_SAVED_OFFSET;				\
113    (FS)->regs.reg[5].loc.offset = (long)&sc_->rsi - new_cfa_;		\
114    (FS)->regs.reg[6].how = REG_SAVED_OFFSET;				\
115    (FS)->regs.reg[6].loc.offset = (long)&sc_->rdi - new_cfa_;		\
116    (FS)->regs.reg[8].how = REG_SAVED_OFFSET;				\
117    (FS)->regs.reg[8].loc.offset = (long)&sc_->r8 - new_cfa_;		\
118    (FS)->regs.reg[9].how = REG_SAVED_OFFSET;				\
119    (FS)->regs.reg[9].loc.offset = (long)&sc_->r9 - new_cfa_;		\
120    (FS)->regs.reg[10].how = REG_SAVED_OFFSET;				\
121    (FS)->regs.reg[10].loc.offset = (long)&sc_->r10 - new_cfa_;		\
122    (FS)->regs.reg[11].how = REG_SAVED_OFFSET;				\
123    (FS)->regs.reg[11].loc.offset = (long)&sc_->r11 - new_cfa_;		\
124    (FS)->regs.reg[12].how = REG_SAVED_OFFSET;				\
125    (FS)->regs.reg[12].loc.offset = (long)&sc_->r12 - new_cfa_;		\
126    (FS)->regs.reg[13].how = REG_SAVED_OFFSET;				\
127    (FS)->regs.reg[13].loc.offset = (long)&sc_->r13 - new_cfa_;		\
128    (FS)->regs.reg[14].how = REG_SAVED_OFFSET;				\
129    (FS)->regs.reg[14].loc.offset = (long)&sc_->r14 - new_cfa_;		\
130    (FS)->regs.reg[15].how = REG_SAVED_OFFSET;				\
131    (FS)->regs.reg[15].loc.offset = (long)&sc_->r15 - new_cfa_;		\
132    (FS)->retaddr_column = 16;						\
133    goto SUCCESS;							\
134  } while (0)
135