131 lines
4.3 KiB
C
131 lines
4.3 KiB
C
/* Definitions of target machine for GNU compiler,
|
|
for powerpc machines running Linux.
|
|
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 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)"
|
|
|
|
/* 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
|
|
#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
|
|
|
|
#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"
|
|
|
|
/* For backward compatibility, we must continue to use the AIX
|
|
structure return convention. */
|
|
#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. */
|
|
|
|
#ifdef IN_LIBGCC2
|
|
#include <signal.h>
|
|
#include <sys/ucontext.h>
|
|
|
|
enum { SIGNAL_FRAMESIZE = 64 };
|
|
#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)
|
|
|