/* Target-dependent code for OpenBSD/sparc64.
- Copyright 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2004-2012 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 "frame.h"
#include "frame-unwind.h"
+#include "gdbcore.h"
#include "osabi.h"
+#include "regcache.h"
#include "regset.h"
#include "symtab.h"
#include "objfiles.h"
-#include "solib-svr4.h"
#include "trad-frame.h"
#include "gdb_assert.h"
+#include "obsd-tdep.h"
#include "sparc64-tdep.h"
+#include "solib-svr4.h"
+#include "bsd-uthread.h"
/* OpenBSD uses the traditional NetBSD core file format, even for
ports that use ELF. The core files don't use multiple register
};
static int
-sparc64obsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+sparc64obsd_pc_in_sigtramp (CORE_ADDR pc, const char *name)
{
CORE_ADDR start_pc = (pc & ~(sparc64obsd_page_size - 1));
unsigned long insn;
}
static struct sparc_frame_cache *
-sparc64obsd_frame_cache (struct frame_info *next_frame, void **this_cache)
+sparc64obsd_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 &= ~(sparc64obsd_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);
if (addr & 1)
addr += BIAS;
cache->base = addr;
/* We find the appropriate instance of `struct sigcontext' at a
fixed offset in the signal frame. */
addr = cache->base + 128 + 16;
- cache->saved_regs = sparc64nbsd_sigcontext_saved_regs (addr, next_frame);
+ cache->saved_regs = sparc64nbsd_sigcontext_saved_regs (addr, this_frame);
return cache;
}
static void
-sparc64obsd_frame_this_id (struct frame_info *next_frame, void **this_cache,
+sparc64obsd_frame_this_id (struct frame_info *this_frame, void **this_cache,
struct frame_id *this_id)
{
struct sparc_frame_cache *cache =
- sparc64obsd_frame_cache (next_frame, this_cache);
+ sparc64obsd_frame_cache (this_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
-static void
-sparc64obsd_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 *
+sparc64obsd_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
{
struct sparc_frame_cache *cache =
- sparc64obsd_frame_cache (next_frame, this_cache);
+ sparc64obsd_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 int
+sparc64obsd_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 (sparc64obsd_pc_in_sigtramp (pc, name))
+ return 1;
+
+ return 0;
}
static const struct frame_unwind sparc64obsd_frame_unwind =
{
SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
sparc64obsd_frame_this_id,
- sparc64obsd_frame_prev_register
+ sparc64obsd_frame_prev_register,
+ NULL,
+ sparc64obsd_sigtramp_frame_sniffer
};
+\f
+/* Kernel debugging support. */
+
+static struct sparc_frame_cache *
+sparc64obsd_trapframe_cache (struct frame_info *this_frame, void **this_cache)
+{
+ struct sparc_frame_cache *cache;
+ CORE_ADDR sp, trapframe_addr;
+ int regnum;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = sparc_frame_cache (this_frame, this_cache);
+ gdb_assert (cache == *this_cache);
+
+ sp = get_frame_register_unsigned (this_frame, SPARC_SP_REGNUM);
+ trapframe_addr = sp + BIAS + 176;
+
+ cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
+
+ cache->saved_regs[SPARC64_STATE_REGNUM].addr = trapframe_addr;
+ cache->saved_regs[SPARC64_PC_REGNUM].addr = trapframe_addr + 8;
+ cache->saved_regs[SPARC64_NPC_REGNUM].addr = trapframe_addr + 16;
+
+ for (regnum = SPARC_G0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
+ cache->saved_regs[regnum].addr =
+ trapframe_addr + 48 + (regnum - SPARC_G0_REGNUM) * 8;
+
+ return cache;
+}
+
+static void
+sparc64obsd_trapframe_this_id (struct frame_info *this_frame,
+ void **this_cache, struct frame_id *this_id)
+{
+ struct sparc_frame_cache *cache =
+ sparc64obsd_trapframe_cache (this_frame, this_cache);
+
+ (*this_id) = frame_id_build (cache->base, cache->pc);
+}
+
+static struct value *
+sparc64obsd_trapframe_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
+{
+ struct sparc_frame_cache *cache =
+ sparc64obsd_trapframe_cache (this_frame, this_cache);
+
+ return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
+}
-static const struct frame_unwind *
-sparc64obsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
+static int
+sparc64obsd_trapframe_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;
+ ULONGEST pstate;
+ const char *name;
+
+ /* Check whether we are in privileged mode, and bail out if we're not. */
+ pstate = get_frame_register_unsigned (this_frame, SPARC64_PSTATE_REGNUM);
+ if ((pstate & SPARC64_PSTATE_PRIV) == 0)
+ return 0;
+ pc = get_frame_address_in_block (this_frame);
find_pc_partial_function (pc, &name, NULL, NULL);
- if (sparc64obsd_pc_in_sigtramp (pc, name))
- return &sparc64obsd_frame_unwind;
+ if (name && strcmp (name, "Lslowtrap_reenter") == 0)
+ return 1;
- return NULL;
+ return 0;
+}
+
+static const struct frame_unwind sparc64obsd_trapframe_unwind =
+{
+ NORMAL_FRAME,
+ default_frame_unwind_stop_reason,
+ sparc64obsd_trapframe_this_id,
+ sparc64obsd_trapframe_prev_register,
+ NULL,
+ sparc64obsd_trapframe_sniffer
+};
+\f
+
+/* Threads support. */
+
+/* Offset wthin the thread structure where we can find %fp and %i7. */
+#define SPARC64OBSD_UTHREAD_FP_OFFSET 232
+#define SPARC64OBSD_UTHREAD_PC_OFFSET 240
+
+static void
+sparc64obsd_supply_uthread (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 fp, fp_addr = addr + SPARC64OBSD_UTHREAD_FP_OFFSET;
+ gdb_byte buf[8];
+
+ gdb_assert (regnum >= -1);
+
+ fp = read_memory_unsigned_integer (fp_addr, 8, byte_order);
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 8, byte_order, fp);
+ regcache_raw_supply (regcache, SPARC_SP_REGNUM, buf);
+
+ if (regnum == SPARC_SP_REGNUM)
+ return;
+ }
+
+ if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM
+ || regnum == -1)
+ {
+ CORE_ADDR i7, i7_addr = addr + SPARC64OBSD_UTHREAD_PC_OFFSET;
+
+ i7 = read_memory_unsigned_integer (i7_addr, 8, byte_order);
+ if (regnum == SPARC64_PC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 8, byte_order, i7 + 8);
+ regcache_raw_supply (regcache, SPARC64_PC_REGNUM, buf);
+ }
+ if (regnum == SPARC64_NPC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 8, byte_order, i7 + 12);
+ regcache_raw_supply (regcache, SPARC64_NPC_REGNUM, buf);
+ }
+
+ if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM)
+ return;
+ }
+
+ sparc_supply_rwindow (regcache, fp, regnum);
+}
+
+static void
+sparc64obsd_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[8];
+
+ gdb_assert (regnum >= -1);
+
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ CORE_ADDR fp_addr = addr + SPARC64OBSD_UTHREAD_FP_OFFSET;
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ write_memory (fp_addr,buf, 8);
+ }
+
+ if (regnum == SPARC64_PC_REGNUM || regnum == -1)
+ {
+ CORE_ADDR i7, i7_addr = addr + SPARC64OBSD_UTHREAD_PC_OFFSET;
+
+ regcache_raw_collect (regcache, SPARC64_PC_REGNUM, buf);
+ i7 = extract_unsigned_integer (buf, 8, byte_order) - 8;
+ write_memory_unsigned_integer (i7_addr, 8, byte_order, i7);
+
+ if (regnum == SPARC64_PC_REGNUM)
+ return;
+ }
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 8, byte_order);
+ sparc_collect_rwindow (regcache, sp, regnum);
}
\f
tdep->gregset = regset_alloc (gdbarch, sparc64obsd_supply_gregset, NULL);
tdep->sizeof_gregset = 832;
- frame_unwind_append_sniffer (gdbarch, sparc64obsd_sigtramp_frame_sniffer);
+ /* Make sure we can single-step "new" syscalls. */
+ tdep->step_trap = sparcnbsd_step_trap;
+
+ frame_unwind_append_unwinder (gdbarch, &sparc64obsd_frame_unwind);
+ frame_unwind_append_unwinder (gdbarch, &sparc64obsd_trapframe_unwind);
sparc64_init_abi (info, gdbarch);
/* OpenBSD/sparc64 has SVR4-style shared libraries. */
- set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_lp64_fetch_link_map_offsets);
+ set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
+
+ /* OpenBSD provides a user-level threads implementation. */
+ bsd_uthread_set_supply_uthread (gdbarch, sparc64obsd_supply_uthread);
+ bsd_uthread_set_collect_uthread (gdbarch, sparc64obsd_collect_uthread);
}
\f
projects / deliverable / binutils-gdb.git / blobdiff