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/* Definitions of target machine for GNU compiler,
for IBM RS/6000 running AIX version 3.1.
Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
Contributed by Michael Meissner (meissner@cygnus.com).
This file is part of GNU CC.
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.
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.
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
#undef MD_EXEC_PREFIX
#undef MD_STARTFILE_PREFIX
#undef CPP_PREDEFINES
#define CPP_PREDEFINES \
"-DPPC -D__ELF__ -Dpowerpc -Acpu=powerpc -Amachine=powerpc"
#undef CPP_OS_DEFAULT_SPEC
#define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
#undef LINK_SHLIB_SPEC
#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
#undef LIB_DEFAULT_SPEC
#define LIB_DEFAULT_SPEC "%(lib_linux)"
#undef STARTFILE_DEFAULT_SPEC
#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
#undef ENDFILE_DEFAULT_SPEC
#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
#undef LINK_START_DEFAULT_SPEC
#define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
#undef LINK_OS_DEFAULT_SPEC
#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
#undef TARGET_VERSION
#define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
/* Override rs6000.h definition. */
#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"
/* Override rs6000.h definition. */
#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"
#undef DEFAULT_VTABLE_THUNKS
#ifndef USE_GNULIBC_1
#define DEFAULT_VTABLE_THUNKS 1
#endif
/* Do code reading to identify a signal frame, and set the frame
state data appropriately. See unwind-dw2.c for the structs. */
#ifdef IN_LIBGCC2
#include <signal.h>
#include <sys/ucontext.h>
#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 (rt_sigreturn) */ \
/* li r0, 0x6666; sc (sigreturn) */ \
if (((*(unsigned int *) (pc_+0) == 0x38007777) \
|| (*(unsigned int *) (pc_+0) == 0x38006666)) \
&& (*(unsigned int *) (pc_+4) == 0x44000002)) \
sc_ = (CONTEXT)->cfa + __SIGNAL_FRAMESIZE; \
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. */ \
sc_->regs->nip += 4; \
(FS)->regs.reg[CR0_REGNO].how = REG_SAVED_OFFSET; \
(FS)->regs.reg[CR0_REGNO].loc.offset \
= (long)&(sc_->regs->nip) - new_cfa_; \
(FS)->retaddr_column = CR0_REGNO; \
goto SUCCESS; \
} while (0)
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