| Line 22... |
Line 22... |
You should have received a copy of the GNU General Public License along
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http://www.gnu.org/licenses/>. */
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with this program. If not, see <http://www.gnu.org/licenses/>. */
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/*-----------------------------------------------------------------------------
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/*-----------------------------------------------------------------------------
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This version for the OpenRISC 1000 architecture is a rewrite by Jeremy
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This version for the OpenRISC 1000 architecture is a rewrite by Jeremy
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Bennett of the old GDB 5.3 interface to make use of gdbarch for GDB 6.8.
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Bennett of the old GDB 5.3 interface to make use of gdbarch for GDB 6.8. It
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has since been updated for GDB 7.2.
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The code tries to follow the GDB coding style.
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The code tries to follow the GDB coding style.
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Commenting is Doxygen compatible.
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Commenting is Doxygen compatible.
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Notes on the GDB 7.2 version
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============================
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The primary change is to support the new GCC 4.5.1 compiler, which no
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longer adds preceding underscores to global values and uses DWARF2 as its
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default debug format.
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This version now supports Or1ksim integrated as a simulator library, so
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"target sim" will work. It does require Or1ksim to be available as a
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library at configuration time, with the Or1ksim installation directory
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specified by the argument --with-or1ksim.
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The ad-hoc prologue analysis, which was always a weak point has been
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stripped out and replaced with code based on the generic approach in
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prologue-value.c and prologue-value.h.
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The objective with this version is to get reasonable results on regression
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testing. Something the older versions never achieved.
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Notes on the GDB 6.8 version
|
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============================
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Much has been stripped out in the interests of getting a basic working
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Much has been stripped out in the interests of getting a basic working
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system. This is described as the OpenRISC 1000 target architecture, so
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system. This is described as the OpenRISC 1000 target architecture, so
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should work with 16, 32 and 64 bit versions of that architecture and should
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should work with 32 and 64 bit versions of that architecture and should
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work whether or not they have floating point and/or vector registers.
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work whether or not they have floating point and/or vector registers,
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although to date it has only been tested with the 32-bit integer
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There was never a capability to run simulator commands (no remote target
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archtiecture.
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implemented the required function), so that has been removed.
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The info trace command has been removed. The meaning of this is not clear -
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The info trace command has been removed. The meaning of this is not clear -
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it relies on a value in register 255 of the debug group, which is
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it relies on a value in register 255 of the debug group, which is
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undocumented.
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undocumented.
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| Line 576... |
Line 598... |
int regnum)
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int regnum)
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{
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{
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static char *or32_gdb_reg_names[OR32_TOTAL_NUM_REGS] =
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static char *or32_gdb_reg_names[OR32_TOTAL_NUM_REGS] =
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{
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{
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/* general purpose registers */
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/* general purpose registers */
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
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"r0", "sp", "fp", "r3", "r4", "r5", "r6", "r7",
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
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"r8", "lr", "r10", "r11", "r12", "r13", "r14", "r15",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
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/* previous program counter, next program counter and status register */
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/* previous program counter, next program counter and status register */
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"ppc", "npc", "sr"
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"ppc", "pc", "sr"
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|
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/* Floating point and vector registers may appear as pseudo registers in
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/* Floating point and vector registers may appear as pseudo registers in
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the future. */
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the future. */
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};
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};
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| Line 949... |
Line 971... |
or32_unwind_pc (struct gdbarch *gdbarch,
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or32_unwind_pc (struct gdbarch *gdbarch,
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struct frame_info *next_frame)
|
struct frame_info *next_frame)
|
{
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{
|
CORE_ADDR pc = frame_unwind_register_unsigned (next_frame, OR32_NPC_REGNUM);
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CORE_ADDR pc = frame_unwind_register_unsigned (next_frame, OR32_NPC_REGNUM);
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if (frame_debug)
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{
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fprintf_unfiltered (gdb_stdlog,
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"or32_unwind_pc, next_frame = 0x%p, pc = 0x%p\n",
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next_frame, (void *) pc);
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}
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return pc;
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return pc;
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} /* or32_unwind_pc() */
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} /* or32_unwind_pc() */
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| Line 971... |
Line 1000... |
or32_unwind_sp (struct gdbarch *gdbarch,
|
or32_unwind_sp (struct gdbarch *gdbarch,
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struct frame_info *next_frame)
|
struct frame_info *next_frame)
|
{
|
{
|
CORE_ADDR sp = frame_unwind_register_unsigned (next_frame, OR32_SP_REGNUM);
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CORE_ADDR sp = frame_unwind_register_unsigned (next_frame, OR32_SP_REGNUM);
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|
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if (frame_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog,
|
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"or32_unwind_sp, next_frame = 0x%p, sp = 0x%p\n",
|
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next_frame, (void *) sp);
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}
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return sp;
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return sp;
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} /* or32_unwind_sp() */
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} /* or32_unwind_sp() */
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| Line 1291... |
Line 1327... |
int frame_size = 0;
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int frame_size = 0;
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CORE_ADDR start_addr;
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CORE_ADDR start_addr;
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CORE_ADDR end_addr;
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CORE_ADDR end_addr;
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if (frame_debug)
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{
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fprintf_unfiltered (gdb_stdlog,
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"or32_frame_cache, prologue_cache = 0x%p\n",
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*prologue_cache);
|
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}
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/* Nothing to do if we already have this info */
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/* Nothing to do if we already have this info */
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if (NULL != *prologue_cache)
|
if (NULL != *prologue_cache)
|
{
|
{
|
return *prologue_cache;
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return *prologue_cache;
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}
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}
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| Line 1309... |
Line 1352... |
find_pc_partial_function (this_pc, NULL, &start_addr, NULL);
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find_pc_partial_function (this_pc, NULL, &start_addr, NULL);
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|
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/* Return early if GDB couldn't find the function. */
|
/* Return early if GDB couldn't find the function. */
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if (start_addr == 0)
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if (start_addr == 0)
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{
|
{
|
|
if (frame_debug)
|
|
{
|
|
fprintf_unfiltered (gdb_stdlog, " couldn't find function\n");
|
|
}
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return info;
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return info;
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}
|
}
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|
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/* Get the stack pointer if we have one (if there's no process executing yet
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/* Get the stack pointer if we have one (if there's no process executing yet
|
we won't have a frame. */
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we won't have a frame. */
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| Line 1471... |
Line 1519... |
}
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}
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/* Build the frame ID */
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/* Build the frame ID */
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trad_frame_set_id (info, frame_id_build (this_sp_for_id, start_addr));
|
trad_frame_set_id (info, frame_id_build (this_sp_for_id, start_addr));
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|
|
if (frame_debug)
|
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{
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|
fprintf_unfiltered (gdb_stdlog, " this_sp_for_id = 0x%p\n",
|
|
(void *) this_sp_for_id);
|
|
fprintf_unfiltered (gdb_stdlog, " start_addr = 0x%p\n",
|
|
(void *) start_addr);
|
|
}
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|
|
return info;
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return info;
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|
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} /* or32_frame_cache() */
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} /* or32_frame_cache() */
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| Line 1558... |
Line 1614... |
.dealloc_cache = NULL,
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.dealloc_cache = NULL,
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.prev_arch = NULL
|
.prev_arch = NULL
|
};
|
};
|
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|
|
|
#if 0
|
/*----------------------------------------------------------------------------*/
|
/*----------------------------------------------------------------------------*/
|
/*!Return the base address of the frame
|
/*!Return the base address of the frame
|
|
|
The implementations has changed since GDB 6.8, since we are now provided
|
The implementations has changed since GDB 6.8, since we are now provided
|
with the address of THIS frame, rather than the NEXT frame.
|
with the address of THIS frame, rather than the NEXT frame.
|
| Line 1606... |
Line 1663... |
};
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};
|
|
|
return &or32_frame_base;
|
return &or32_frame_base;
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|
|
} /* or32_frame_base_sniffer () */
|
} /* or32_frame_base_sniffer () */
|
|
#endif
|
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|
|
|
/* -------------------------------------------------------------------------- */
|
/* -------------------------------------------------------------------------- */
|
/*!Architecture initialization for OpenRISC 1000
|
/*!Architecture initialization for OpenRISC 1000
|
|
|
| Line 1714... |
Line 1772... |
|
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/* Functions handling dummy frames */
|
/* Functions handling dummy frames */
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set_gdbarch_push_dummy_call (gdbarch, or32_push_dummy_call);
|
set_gdbarch_push_dummy_call (gdbarch, or32_push_dummy_call);
|
set_gdbarch_dummy_id (gdbarch, or32_dummy_id);
|
set_gdbarch_dummy_id (gdbarch, or32_dummy_id);
|
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|
|
#if 0
|
/* Set up sniffers for the frame base. Use DWARF debug info if available,
|
/* Set up sniffers for the frame base. Use DWARF debug info if available,
|
otherwise use our own sniffer. */
|
otherwise use our own sniffer. */
|
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
|
frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
|
frame_base_append_sniffer (gdbarch, or32_frame_base_sniffer);
|
frame_base_append_sniffer (gdbarch, or32_frame_base_sniffer);
|
|
#endif
|
|
|
/* Frame unwinders. Use DWARF debug info if available, otherwise use our
|
/* Frame unwinders. Use DWARF debug info if available, otherwise use our
|
own unwinder. */
|
own unwinder. */
|
dwarf2_append_unwinders (gdbarch);
|
dwarf2_append_unwinders (gdbarch);
|
frame_unwind_append_unwinder (gdbarch, &or32_frame_unwind);
|
frame_unwind_append_unwinder (gdbarch, &or32_frame_unwind);
|
