/* Target-dependent code for NetBSD/sparc.
- Copyright 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2002-2004, 2006-2012 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
This program 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 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "floatformat.h"
#include "frame.h"
#include "frame-unwind.h"
#include "gdbcore.h"
+#include "gdbtypes.h"
#include "osabi.h"
#include "regcache.h"
#include "regset.h"
#include "sparc-tdep.h"
#include "nbsd-tdep.h"
+/* Macros to extract fields from SPARC instructions. */
+#define X_RS1(i) (((i) >> 14) & 0x1f)
+#define X_RS2(i) ((i) & 0x1f)
+#define X_I(i) (((i) >> 13) & 1)
+
const struct sparc_gregset sparc32nbsd_gregset =
{
0 * 4, /* %psr */
static const CORE_ADDR sparc32nbsd_sigtramp_end = 0xeffffff0;
static int
-sparc32nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+sparc32nbsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
{
if (pc >= sparc32nbsd_sigtramp_start && pc < sparc32nbsd_sigtramp_end)
return 1;
}
struct trad_frame_saved_reg *
-sparc32nbsd_sigcontext_saved_regs (struct frame_info *next_frame)
+sparc32nbsd_sigcontext_saved_regs (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct trad_frame_saved_reg *saved_regs;
CORE_ADDR addr, sigcontext_addr;
int regnum, delta;
ULONGEST psr;
- saved_regs = trad_frame_alloc_saved_regs (next_frame);
+ saved_regs = trad_frame_alloc_saved_regs (this_frame);
/* We find the appropriate instance of `struct sigcontext' at a
fixed offset in the signal frame. */
- addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ addr = get_frame_register_unsigned (this_frame, SPARC_FP_REGNUM);
sigcontext_addr = addr + 64 + 16;
/* The registers are saved in bits and pieces scattered all over the
/* The `local' and `in' registers have been saved in the register
save area. */
addr = saved_regs[SPARC_SP_REGNUM].addr;
- addr = get_frame_memory_unsigned (next_frame, addr, 4);
+ addr = get_frame_memory_unsigned (this_frame, addr, 4);
for (regnum = SPARC_L0_REGNUM;
regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
saved_regs[regnum].addr = addr;
/* Handle StackGhost. */
{
- ULONGEST wcookie = sparc_fetch_wcookie ();
+ ULONGEST wcookie = sparc_fetch_wcookie (gdbarch);
if (wcookie != 0)
{
ULONGEST i7;
addr = saved_regs[SPARC_I7_REGNUM].addr;
- i7 = get_frame_memory_unsigned (next_frame, addr, 4);
+ i7 = get_frame_memory_unsigned (this_frame, addr, 4);
trad_frame_set_value (saved_regs, SPARC_I7_REGNUM, i7 ^ wcookie);
}
}
#define PSR_EF 0x00001000
addr = saved_regs[SPARC32_PSR_REGNUM].addr;
- psr = get_frame_memory_unsigned (next_frame, addr, 4);
+ psr = get_frame_memory_unsigned (this_frame, addr, 4);
if (psr & PSR_EF)
{
CORE_ADDR sp;
- sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ sp = get_frame_register_unsigned (this_frame, SPARC_SP_REGNUM);
saved_regs[SPARC32_FSR_REGNUM].addr = sp + 96;
for (regnum = SPARC_F0_REGNUM, addr = sp + 96 + 8;
regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
}
static struct sparc_frame_cache *
-sparc32nbsd_sigcontext_frame_cache (struct frame_info *next_frame,
+sparc32nbsd_sigcontext_frame_cache (struct frame_info *this_frame,
void **this_cache)
{
struct sparc_frame_cache *cache;
if (*this_cache)
return *this_cache;
- cache = sparc_frame_cache (next_frame, this_cache);
+ cache = sparc_frame_cache (this_frame, this_cache);
gdb_assert (cache == *this_cache);
/* If we couldn't find the frame's function, we're probably dealing
/* Since we couldn't find the frame's function, the cache was
initialized under the assumption that we're frameless. */
- cache->frameless_p = 0;
- addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ sparc_record_save_insn (cache);
+ addr = get_frame_register_unsigned (this_frame, SPARC_FP_REGNUM);
cache->base = addr;
}
- cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (next_frame);
+ cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (this_frame);
return cache;
}
static void
-sparc32nbsd_sigcontext_frame_this_id (struct frame_info *next_frame,
+sparc32nbsd_sigcontext_frame_this_id (struct frame_info *this_frame,
void **this_cache,
struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
- sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache);
+ sparc32nbsd_sigcontext_frame_cache (this_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
-static void
-sparc32nbsd_sigcontext_frame_prev_register (struct frame_info *next_frame,
- void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp,
- CORE_ADDR *addrp,
- int *realnump, void *valuep)
+static struct value *
+sparc32nbsd_sigcontext_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
{
struct sparc_frame_cache *cache =
- sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache);
+ sparc32nbsd_sigcontext_frame_cache (this_frame, this_cache);
- trad_frame_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
}
-static const struct frame_unwind sparc32nbsd_sigcontext_frame_unwind =
-{
- SIGTRAMP_FRAME,
- sparc32nbsd_sigcontext_frame_this_id,
- sparc32nbsd_sigcontext_frame_prev_register
-};
-
-static const struct frame_unwind *
-sparc32nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
+static int
+sparc32nbsd_sigcontext_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ const char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
if (sparc32nbsd_pc_in_sigtramp (pc, name))
{
if (name == NULL || strncmp (name, "__sigtramp_sigcontext", 21))
- return &sparc32nbsd_sigcontext_frame_unwind;
+ return 1;
}
- return NULL;
+ return 0;
}
-\f
-/* Return non-zero if we are in a shared library trampoline code stub. */
+static const struct frame_unwind sparc32nbsd_sigcontext_frame_unwind =
+{
+ SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
+ sparc32nbsd_sigcontext_frame_this_id,
+ sparc32nbsd_sigcontext_frame_prev_register,
+ NULL,
+ sparc32nbsd_sigcontext_frame_sniffer
+};
+\f
+/* Return the address of a system call's alternative return
+ address. */
-static int
-sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+CORE_ADDR
+sparcnbsd_step_trap (struct frame_info *frame, unsigned long insn)
{
- return (name && !strcmp (name, "_DYNAMIC"));
+ if ((X_I (insn) == 0 && X_RS1 (insn) == 0 && X_RS2 (insn) == 0)
+ || (X_I (insn) == 1 && X_RS1 (insn) == 0 && (insn & 0x7f) == 0))
+ {
+ /* "New" system call. */
+ ULONGEST number = get_frame_register_unsigned (frame, SPARC_G1_REGNUM);
+
+ if (number & 0x400)
+ return get_frame_register_unsigned (frame, SPARC_G2_REGNUM);
+ if (number & 0x800)
+ return get_frame_register_unsigned (frame, SPARC_G7_REGNUM);
+ }
+
+ return 0;
}
+\f
static void
sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* NetBSD doesn't support the 128-bit `long double' from the psABI. */
set_gdbarch_long_double_bit (gdbarch, 64);
- set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
tdep->gregset = regset_alloc (gdbarch, sparc32nbsd_supply_gregset, NULL);
tdep->sizeof_gregset = 20 * 4;
tdep->fpregset = regset_alloc (gdbarch, sparc32nbsd_supply_fpregset, NULL);
tdep->sizeof_fpregset = 33 * 4;
- frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer);
+ /* Make sure we can single-step "new" syscalls. */
+ tdep->step_trap = sparcnbsd_step_trap;
+
+ frame_unwind_append_unwinder (gdbarch, &sparc32nbsd_sigcontext_frame_unwind);
}
static void
sparc32nbsd_aout_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
sparc32nbsd_init_abi (info, gdbarch);
-
- set_gdbarch_in_solib_call_trampoline
- (gdbarch, sparcnbsd_aout_in_solib_call_trampoline);
}
-static void
+void
sparc32nbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
sparc32nbsd_init_abi (info, gdbarch);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
static enum gdb_osabi
void _initialize_sparcnbsd_tdep (void);
void
-_initialize_sparnbsd_tdep (void)
+_initialize_sparcnbsd_tdep (void)
{
gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour,
sparcnbsd_aout_osabi_sniffer);
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