OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

linux.h (MD_FALLBACK_FRAME_STATE_FOR): New. 

2001-05-17  Andrew Haley  <aph@redhat.com>

        * config/rs6000/linux.h (MD_FALLBACK_FRAME_STATE_FOR): New.

From-SVN: r42386
This commit is contained in:
Andrew Haley 2001-05-21 12:31:14 +00:00 committed by Andrew Haley
parent f0ef84a27f
commit da50295639
2 changed files with 57 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/ChangeLog
View File

@ -1,3 +1,7 @@
2001-05-17 Andrew Haley <aph@redhat.com>
* config/rs6000/linux.h (MD_FALLBACK_FRAME_STATE_FOR): New.
2001-05-21 Richard Henderson <rth@redhat.com>
* dwarf2out.c (DEBUG_FRAME_SECTION): Rename from FRAME_SECTION.

53
gcc/config/rs6000/linux.h
View File

@ -66,3 +66,56 @@ Boston, MA 02111-1307, USA. */
#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)