/* Definitions of target machine for GNU compiler,
- for powerpc machines running Linux.
- Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003
- Free Software Foundation, Inc.
+ for PowerPC machines running Linux.
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
Contributed by Michael Meissner (meissner@cygnus.com).
-This file is part of GNU CC.
+ This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+ GCC is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ GCC is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ License for more details.
-You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* Don't assume anything about the header files. */
-#define NO_IMPLICIT_EXTERN_C
+ You should have received a copy of the GNU General Public License
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
#undef MD_EXEC_PREFIX
#undef MD_STARTFILE_PREFIX
-#undef CPP_PREDEFINES
-#define CPP_PREDEFINES \
- "-DPPC -D__ELF__ -Dpowerpc -Acpu=powerpc -Amachine=powerpc"
+/* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
+ process. */
+#define OS_MISSING_POWERPC64 1
+
+/* We use glibc _mcount for profiling. */
+#define NO_PROFILE_COUNTERS 1
+
+/* glibc has float and long double forms of math functions. */
+#undef TARGET_C99_FUNCTIONS
+#define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
+
+/* Whether we have sincos that follows the GNU extension. */
+#undef TARGET_HAS_SINCOS
+#define TARGET_HAS_SINCOS (OPTION_GLIBC)
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ builtin_define_std ("PPC"); \
+ builtin_define_std ("powerpc"); \
+ builtin_assert ("cpu=powerpc"); \
+ builtin_assert ("machine=powerpc"); \
+ TARGET_OS_SYSV_CPP_BUILTINS (); \
+ } \
+ while (0)
#undef CPP_OS_DEFAULT_SPEC
#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
/* The GNU C++ standard library currently requires _GNU_SOURCE being
defined on glibc-based systems. This temporary hack accomplishes this,
it should go away as soon as libstdc++-v3 has a real fix. */
-#undef CPLUSPLUS_CPP_SPEC
+#undef CPLUSPLUS_CPP_SPEC
#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
-#undef LINK_SHLIB_SPEC
+#undef LINK_SHLIB_SPEC
#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
#undef LIB_DEFAULT_SPEC
#undef LINK_OS_DEFAULT_SPEC
#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
-#undef TARGET_VERSION
+#define LINK_GCC_C_SEQUENCE_SPEC \
+ "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
+
+/* Use --as-needed -lgcc_s for eh support. */
+#ifdef HAVE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 1
+#endif
+
+#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
/* Override rs6000.h definition. */
-#undef ASM_APP_ON
+#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"
/* Override rs6000.h definition. */
-#undef ASM_APP_OFF
+#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"
/* For backward compatibility, we must continue to use the AIX
structure return convention. */
-#undef DRAFT_V4_STRUCT_RET
+#undef DRAFT_V4_STRUCT_RET
#define DRAFT_V4_STRUCT_RET 1
-/* Do code reading to identify a signal frame, and set the frame
- state data appropriately. See unwind-dw2.c for the structs. */
+/* We are 32-bit all the time, so optimize a little. */
+#undef TARGET_64BIT
+#define TARGET_64BIT 0
+
+/* We don't need to generate entries in .fixup, except when
+ -mrelocatable or -mrelocatable-lib is given. */
+#undef RELOCATABLE_NEEDS_FIXUP
+#define RELOCATABLE_NEEDS_FIXUP \
+ (target_flags & target_flags_explicit & MASK_RELOCATABLE)
-#ifdef IN_LIBGCC2
-#include <signal.h>
-#include <sys/ucontext.h>
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
-enum { SIGNAL_FRAMESIZE = 64 };
+#define TARGET_POSIX_IO
+
+#define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
+
+#ifdef TARGET_LIBC_PROVIDES_SSP
+/* ppc32 glibc provides __stack_chk_guard in -0x7008(2). */
+#define TARGET_THREAD_SSP_OFFSET -0x7008
#endif
-#define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS) \
- do { \
- unsigned char *pc_ = (CONTEXT)->ra; \
- struct sigcontext *sc_; \
- long new_cfa_; \
- int i_; \
- \
- /* li r0, 0x7777; sc (sigreturn old) */ \
- /* li r0, 0x0077; sc (sigreturn new) */ \
- /* li r0, 0x6666; sc (rt_sigreturn old) */ \
- /* li r0, 0x00AC; sc (rt_sigreturn new) */ \
- if (*(unsigned int *) (pc_+4) != 0x44000002) \
- break; \
- if (*(unsigned int *) (pc_+0) == 0x38007777 \
- || *(unsigned int *) (pc_+0) == 0x38000077) \
- { \
- struct sigframe { \
- char gap[SIGNAL_FRAMESIZE]; \
- struct sigcontext sigctx; \
- } *rt_ = (CONTEXT)->cfa; \
- sc_ = &rt_->sigctx; \
- } \
- else if (*(unsigned int *) (pc_+0) == 0x38006666 \
- || *(unsigned int *) (pc_+0) == 0x380000AC) \
- { \
- struct rt_sigframe { \
- char gap[SIGNAL_FRAMESIZE]; \
- unsigned long _unused[2]; \
- struct siginfo *pinfo; \
- void *puc; \
- struct siginfo info; \
- struct ucontext uc; \
- } *rt_ = (CONTEXT)->cfa; \
- sc_ = &rt_->uc.uc_mcontext; \
- } \
- else \
- break; \
- \
- new_cfa_ = sc_->regs->gpr[STACK_POINTER_REGNUM]; \
- (FS)->cfa_how = CFA_REG_OFFSET; \
- (FS)->cfa_reg = STACK_POINTER_REGNUM; \
- (FS)->cfa_offset = new_cfa_ - (long) (CONTEXT)->cfa; \
- \
- for (i_ = 0; i_ < 32; i_++) \
- if (i_ != STACK_POINTER_REGNUM) \
- { \
- (FS)->regs.reg[i_].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[i_].loc.offset \
- = (long)&(sc_->regs->gpr[i_]) - new_cfa_; \
- } \
- \
- (FS)->regs.reg[LINK_REGISTER_REGNUM].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[LINK_REGISTER_REGNUM].loc.offset \
- = (long)&(sc_->regs->link) - new_cfa_; \
- \
- /* The unwinder expects the IP to point to the following insn, \
- whereas the kernel returns the address of the actual \
- faulting insn. We store NIP+4 in an unused register slot to \
- get the same result for multiple evaluation of the same signal \
- frame. */ \
- sc_->regs->gpr[47] = sc_->regs->nip + 4; \
- (FS)->regs.reg[CR0_REGNO].how = REG_SAVED_OFFSET; \
- (FS)->regs.reg[CR0_REGNO].loc.offset \
- = (long)&(sc_->regs->gpr[47]) - new_cfa_; \
- (FS)->retaddr_column = CR0_REGNO; \
- goto SUCCESS; \
- } while (0)
+#define POWERPC_LINUX
+/* ppc linux has 128-bit long double support in glibc 2.4 and later. */
+#ifdef TARGET_DEFAULT_LONG_DOUBLE_128
+#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
+#endif
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