/* Target-dependent code for OpenBSD/sparc.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2006, 2007 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;
void **this_cache,
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *valuep)
+ int *realnump, gdb_byte *valuep)
{
struct sparc_frame_cache *cache =
sparc32obsd_frame_cache (next_frame, this_cache);
}
\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 fp, fp_addr = addr + SPARC32OBSD_UTHREAD_FP_OFFSET;
+ gdb_byte buf[4];
+
+ gdb_assert (regnum >= -1);
+
+ fp = read_memory_unsigned_integer (fp_addr, 4);
+ if (regnum == SPARC_SP_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 4, fp);
+ regcache_raw_supply (regcache, SPARC_SP_REGNUM, buf);
+
+ if (regnum == SPARC_SP_REGNUM)
+ return;
+ }
+
+ 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);
+ if (regnum == SPARC32_PC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 4, i7 + 8);
+ regcache_raw_supply (regcache, SPARC32_PC_REGNUM, buf);
+ }
+ if (regnum == SPARC32_NPC_REGNUM || regnum == -1)
+ {
+ store_unsigned_integer (buf, 4, 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)
+{
+ 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) - 8;
+ write_memory_unsigned_integer (i7_addr, 4, i7);
+
+ if (regnum == SPARC32_PC_REGNUM)
+ return;
+ }
+
+ regcache_raw_collect (regcache, SPARC_SP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 4);
+ sparc_collect_rwindow (regcache, sp, regnum);
+}
+\f
+
static void
sparc32obsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
/* OpenBSD/sparc is very similar to NetBSD/sparc ELF. */
sparc32nbsd_elf_init_abi (info, gdbarch);
+ set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
+
frame_unwind_append_sniffer (gdbarch, sparc32obsd_sigtramp_frame_sniffer);
+
+ /* 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