mirror of
https://github.com/autc04/Retro68.git
synced 2025-02-17 11:31:00 +00:00
58 lines
2.1 KiB
C
58 lines
2.1 KiB
C
/* DWARF2 EH unwinding support for AIX.
|
|
Copyright (C) 2011 Free Software Foundation, Inc.
|
|
|
|
This file is part of GCC.
|
|
|
|
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.
|
|
|
|
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.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* If the current unwind info (FS) does not contain explicit info
|
|
saving R2, then we have to do a minor amount of code reading to
|
|
figure out if it was saved. The big problem here is that the
|
|
code that does the save/restore is generated by the linker, so
|
|
we have no good way to determine at compile time what to do. */
|
|
|
|
#define R_LR 65
|
|
|
|
#ifdef __64BIT__
|
|
#define MD_FROB_UPDATE_CONTEXT(CTX, FS) \
|
|
do { \
|
|
if ((FS)->regs.reg[2].how == REG_UNSAVED) \
|
|
{ \
|
|
unsigned int *insn \
|
|
= (unsigned int *) \
|
|
_Unwind_GetGR ((CTX), R_LR); \
|
|
if (*insn == 0xE8410028) \
|
|
_Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 40); \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
#define MD_FROB_UPDATE_CONTEXT(CTX, FS) \
|
|
do { \
|
|
if ((FS)->regs.reg[2].how == REG_UNSAVED) \
|
|
{ \
|
|
unsigned int *insn \
|
|
= (unsigned int *) \
|
|
_Unwind_GetGR ((CTX), R_LR); \
|
|
if (*insn == 0x80410014) \
|
|
_Unwind_SetGRPtr ((CTX), 2, (CTX)->cfa + 20); \
|
|
} \
|
|
} while (0)
|
|
#endif
|