diff options
Diffstat (limited to 'gcc/config/rs6000/linux.h')
| -rw-r--r-- | gcc/config/rs6000/linux.h | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/gcc/config/rs6000/linux.h b/gcc/config/rs6000/linux.h index 99c04536489..f5cbd7a663e 100644 --- a/gcc/config/rs6000/linux.h +++ b/gcc/config/rs6000/linux.h @@ -1,7 +1,7 @@ /* Definitions of target machine for GNU compiler, for powerpc machines running Linux. - Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, - Inc. + Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003 + Free Software Foundation, Inc. Contributed by Michael Meissner (meissner@cygnus.com). This file is part of GNU CC. @@ -91,12 +91,34 @@ enum { SIGNAL_FRAMESIZE = 64 }; 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; \ + /* 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; \ \ @@ -119,11 +141,13 @@ enum { SIGNAL_FRAMESIZE = 64 }; \ /* 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; \ + 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->nip) - new_cfa_; \ + = (long)&(sc_->regs->gpr[47]) - new_cfa_; \ (FS)->retaddr_column = CR0_REGNO; \ goto SUCCESS; \ } while (0) |