/* Target-dependent code for OpenBSD/sparc.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004-2014 Free Software Foundation, 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 "osabi.h"
-#include "solib-svr4.h"
+#include "regcache.h"
#include "symtab.h"
#include "trad-frame.h"
#include "gdb_assert.h"
+#include "obsd-tdep.h"
#include "sparc-tdep.h"
+#include "solib-svr4.h"
+#include "bsd-uthread.h"
/* Signal trampolines. */
detecting it won't work.
The signal trampoline will be mapped at an address that is page
- aligned. We recognize the signal trampoline by the looking for the
+ aligned. We recognize the signal trampoline by looking for the
sigreturn system call. */
static const int sparc32obsd_page_size = 4096;
static int
-sparc32obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+sparc32obsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
{
CORE_ADDR start_pc = (pc & ~(sparc32obsd_page_size - 1));
unsigned long insn;
}
static struct sparc_frame_cache *
-sparc32obsd_frame_cache (struct frame_info *next_frame, void **this_cache)
+sparc32obsd_sigtramp_frame_cache (struct frame_info *this_frame,
+ void **this_cache)
{
struct sparc_frame_cache *cache;
CORE_ADDR addr;
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
with an on-stack signal trampoline. */
if (cache->pc == 0)
{
- cache->pc = frame_pc_unwind (next_frame);
+ cache->pc = get_frame_pc (this_frame);
cache->pc &= ~(sparc32obsd_page_size - 1);
/* 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
-sparc32obsd_frame_this_id (struct frame_info *next_frame, void **this_cache,
- struct frame_id *this_id)
+sparc32obsd_sigtramp_frame_this_id (struct frame_info *this_frame,
+ void **this_cache,
+ struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
- sparc32obsd_frame_cache (next_frame, this_cache);
+ sparc32obsd_sigtramp_frame_cache (this_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
-static void
-sparc32obsd_frame_prev_register (struct frame_info *next_frame,
- void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, gdb_byte *valuep)
+static struct value *
+sparc32obsd_sigtramp_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
{
struct sparc_frame_cache *cache =
- sparc32obsd_frame_cache (next_frame, this_cache);
+ sparc32obsd_sigtramp_frame_cache (this_frame, this_cache);
- trad_frame_get_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 sparc32obsd_frame_unwind =
+static int
+sparc32obsd_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
+{
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ const char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (sparc32obsd_pc_in_sigtramp (pc, name))
+ return 1;
+
+ return 0;
+}
+static const struct frame_unwind sparc32obsd_sigtramp_frame_unwind =
{
SIGTRAMP_FRAME,
- sparc32obsd_frame_this_id,
- sparc32obsd_frame_prev_register
+ default_frame_unwind_stop_reason,
+ sparc32obsd_sigtramp_frame_this_id,
+ sparc32obsd_sigtramp_frame_prev_register,
+ NULL,
+ sparc32obsd_sigtramp_frame_sniffer
};
-static const struct frame_unwind *
-sparc32obsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
+\f
+
+/* Offset wthin the thread structure where we can find %fp and %i7. */
+#define SPARC32OBSD_UTHREAD_FP_OFFSET 128
+#define SPARC32OBSD_UTHREAD_PC_OFFSET 132
+
+static void
+sparc32obsd_supply_uthread (struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR fp, fp_addr = addr + SPARC32OBSD_UTHREAD_FP_OFFSET;
+ gdb_byte buf[4];
- find_pc_partial_function (pc, &name, NULL, NULL);
- if (sparc32obsd_pc_in_sigtramp (pc, name))
- return &sparc32obsd_frame_unwind;
+ gdb_assert (regnum >= -1);
+
+ fp = read_memory_unsigned_integer (fp_addr, 4, byte_order);
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 4, byte_order, fp);
+ regcache_raw_supply (regcache, SPARC_SP_REGNUM, buf);
+
+ if (regnum == SPARC_SP_REGNUM)
+ return;
+ }
- return NULL;
+ if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM
+ || regnum == -1)
+ {
+ CORE_ADDR i7, i7_addr = addr + SPARC32OBSD_UTHREAD_PC_OFFSET;
+
+ i7 = read_memory_unsigned_integer (i7_addr, 4, byte_order);
+ if (regnum == SPARC32_PC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 4, byte_order, i7 + 8);
+ regcache_raw_supply (regcache, SPARC32_PC_REGNUM, buf);
+ }
+ if (regnum == SPARC32_NPC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 4, byte_order, i7 + 12);
+ regcache_raw_supply (regcache, SPARC32_NPC_REGNUM, buf);
+ }
+
+ if (regnum == SPARC32_PC_REGNUM || regnum == SPARC32_NPC_REGNUM)
+ return;
+ }
+
+ sparc_supply_rwindow (regcache, fp, regnum);
+}
+
+static void
+sparc32obsd_collect_uthread(const struct regcache *regcache,
+ int regnum, CORE_ADDR addr)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ CORE_ADDR sp;
+ gdb_byte buf[4];
+
+ gdb_assert (regnum >= -1);
+
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ CORE_ADDR fp_addr = addr + SPARC32OBSD_UTHREAD_FP_OFFSET;
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ write_memory (fp_addr,buf, 4);
+ }
+
+ if (regnum == SPARC32_PC_REGNUM || regnum == -1)
+ {
+ CORE_ADDR i7, i7_addr = addr + SPARC32OBSD_UTHREAD_PC_OFFSET;
+
+ regcache_raw_collect (regcache, SPARC32_PC_REGNUM, buf);
+ i7 = extract_unsigned_integer (buf, 4, byte_order) - 8;
+ write_memory_unsigned_integer (i7_addr, 4, byte_order, i7);
+
+ if (regnum == SPARC32_PC_REGNUM)
+ return;
+ }
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 4, byte_order);
+ sparc_collect_rwindow (regcache, sp, regnum);
}
\f
/* OpenBSD/sparc is very similar to NetBSD/sparc ELF. */
sparc32nbsd_elf_init_abi (info, gdbarch);
- frame_unwind_append_sniffer (gdbarch, sparc32obsd_sigtramp_frame_sniffer);
+ set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
+
+ frame_unwind_append_unwinder (gdbarch, &sparc32obsd_sigtramp_frame_unwind);
+
+ /* OpenBSD provides a user-level threads implementation. */
+ bsd_uthread_set_supply_uthread (gdbarch, sparc32obsd_supply_uthread);
+ bsd_uthread_set_collect_uthread (gdbarch, sparc32obsd_collect_uthread);
}
\f
projects / thirdparty / binutils-gdb.git / blobdiff