159 lines
4.8 KiB
C
159 lines
4.8 KiB
C
/* DWARF2 EH unwinding support for SPARC Linux.
|
|
Copyright 2004, 2005 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 2, or (at your option)
|
|
any later version.
|
|
|
|
In addition to the permissions in the GNU General Public License, the
|
|
Free Software Foundation gives you unlimited permission to link the
|
|
compiled version of this file with other programs, and to distribute
|
|
those programs without any restriction coming from the use of this
|
|
file. (The General Public License restrictions do apply in other
|
|
respects; for example, they cover modification of the file, and
|
|
distribution when not linked into another program.)
|
|
|
|
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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GCC; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/* Do code reading to identify a signal frame, and set the frame
|
|
state data appropriately. See unwind-dw2.c for the structs. */
|
|
|
|
/* Handle multilib correctly. */
|
|
#if defined(__arch64__)
|
|
|
|
/* 64-bit SPARC version */
|
|
#define MD_FALLBACK_FRAME_STATE_FOR sparc64_fallback_frame_state
|
|
|
|
static _Unwind_Reason_Code
|
|
sparc64_fallback_frame_state (struct _Unwind_Context *context,
|
|
_Unwind_FrameState *fs)
|
|
{
|
|
unsigned int *pc = context->ra;
|
|
long new_cfa, i;
|
|
long regs_off, fpu_save_off;
|
|
long this_cfa, fpu_save;
|
|
|
|
if (pc[0] != 0x82102065 /* mov NR_rt_sigreturn, %g1 */
|
|
|| pc[1] != 0x91d0206d) /* ta 0x6d */
|
|
return _URC_END_OF_STACK;
|
|
regs_off = 192 + 128;
|
|
fpu_save_off = regs_off + (16 * 8) + (3 * 8) + (2 * 4);
|
|
this_cfa = (long) context->cfa;
|
|
new_cfa = *(long *)((context->cfa) + (regs_off + (14 * 8)));
|
|
new_cfa += 2047; /* Stack bias */
|
|
fpu_save = *(long *)((this_cfa) + (fpu_save_off));
|
|
fs->cfa_how = CFA_REG_OFFSET;
|
|
fs->cfa_reg = 14;
|
|
fs->cfa_offset = new_cfa - (long) context->cfa;
|
|
for (i = 1; i < 16; ++i)
|
|
{
|
|
fs->regs.reg[i].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[i].loc.offset =
|
|
this_cfa + (regs_off + (i * 8)) - new_cfa;
|
|
}
|
|
for (i = 0; i < 16; ++i)
|
|
{
|
|
fs->regs.reg[i + 16].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[i + 16].loc.offset =
|
|
this_cfa + (i * 8) - new_cfa;
|
|
}
|
|
if (fpu_save)
|
|
{
|
|
for (i = 0; i < 64; ++i)
|
|
{
|
|
if (i > 32 && (i & 0x1))
|
|
continue;
|
|
fs->regs.reg[i + 32].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[i + 32].loc.offset =
|
|
(fpu_save + (i * 4)) - new_cfa;
|
|
}
|
|
}
|
|
/* Stick return address into %g0, same trick Alpha uses. */
|
|
fs->regs.reg[0].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[0].loc.offset =
|
|
this_cfa + (regs_off + (16 * 8) + 8) - new_cfa;
|
|
fs->retaddr_column = 0;
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
#else
|
|
|
|
/* 32-bit SPARC version */
|
|
#define MD_FALLBACK_FRAME_STATE_FOR sparc_fallback_frame_state
|
|
|
|
static _Unwind_Reason_Code
|
|
sparc_fallback_frame_state (struct _Unwind_Context *context,
|
|
_Unwind_FrameState *fs)
|
|
{
|
|
unsigned int *pc = context->ra;
|
|
int new_cfa, i, oldstyle;
|
|
int regs_off, fpu_save_off;
|
|
int fpu_save, this_cfa;
|
|
|
|
if (pc[1] != 0x91d02010) /* ta 0x10 */
|
|
return _URC_END_OF_STACK;
|
|
if (pc[0] == 0x821020d8) /* mov NR_sigreturn, %g1 */
|
|
oldstyle = 1;
|
|
else if (pc[0] == 0x82102065) /* mov NR_rt_sigreturn, %g1 */
|
|
oldstyle = 0;
|
|
else
|
|
return _URC_END_OF_STACK;
|
|
if (oldstyle)
|
|
{
|
|
regs_off = 96;
|
|
fpu_save_off = regs_off + (4 * 4) + (16 * 4);
|
|
}
|
|
else
|
|
{
|
|
regs_off = 96 + 128;
|
|
fpu_save_off = regs_off + (4 * 4) + (16 * 4) + (2 * 4);
|
|
}
|
|
this_cfa = (int) context->cfa;
|
|
new_cfa = *(int *)((context->cfa) + (regs_off+(4*4)+(14 * 4)));
|
|
fpu_save = *(int *)((this_cfa) + (fpu_save_off));
|
|
fs->cfa_how = CFA_REG_OFFSET;
|
|
fs->cfa_reg = 14;
|
|
fs->cfa_offset = new_cfa - (int) context->cfa;
|
|
for (i = 1; i < 16; ++i)
|
|
{
|
|
if (i == 14)
|
|
continue;
|
|
fs->regs.reg[i].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[i].loc.offset =
|
|
this_cfa + (regs_off+(4 * 4)+(i * 4)) - new_cfa;
|
|
}
|
|
for (i = 0; i < 16; ++i)
|
|
{
|
|
fs->regs.reg[i + 16].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[i + 16].loc.offset =
|
|
this_cfa + (i * 4) - new_cfa;
|
|
}
|
|
if (fpu_save)
|
|
{
|
|
for (i = 0; i < 32; ++i)
|
|
{
|
|
fs->regs.reg[i + 32].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[i + 32].loc.offset =
|
|
(fpu_save + (i * 4)) - new_cfa;
|
|
}
|
|
}
|
|
/* Stick return address into %g0, same trick Alpha uses. */
|
|
fs->regs.reg[0].how = REG_SAVED_OFFSET;
|
|
fs->regs.reg[0].loc.offset = this_cfa+(regs_off+4)-new_cfa;
|
|
fs->retaddr_column = 0;
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
#endif
|