/* Target-dependent code for GNU/Linux UltraSPARC.
- Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2007, 2008 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "frame.h"
#include "frame-unwind.h"
+#include "dwarf2-frame.h"
+#include "regset.h"
+#include "regcache.h"
#include "gdbarch.h"
+#include "gdbcore.h"
#include "osabi.h"
#include "solib-svr4.h"
#include "symtab.h"
/* Signal trampoline support. */
static void sparc64_linux_sigframe_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func);
static void
sparc64_linux_sigframe_init (const struct tramp_frame *self,
- struct frame_info *next_frame,
+ struct frame_info *this_frame,
struct trad_frame_cache *this_cache,
CORE_ADDR func)
{
- CORE_ADDR base, addr;
+ CORE_ADDR base, addr, sp_addr;
int regnum;
- base = frame_unwind_register_unsigned (next_frame, SPARC_O1_REGNUM);
+ base = get_frame_register_unsigned (this_frame, SPARC_O1_REGNUM);
base += 128;
/* Offsets from <bits/sigcontext.h>. */
/* Since %g0 is always zero, keep the identity encoding. */
addr = base + 8;
+ sp_addr = base + ((SPARC_SP_REGNUM - SPARC_G0_REGNUM) * 8);
for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
trad_frame_set_reg_addr (this_cache, SPARC64_Y_REGNUM, addr + 24);
trad_frame_set_reg_addr (this_cache, SPARC64_FPRS_REGNUM, addr + 28);
- addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ base = get_frame_register_unsigned (this_frame, SPARC_SP_REGNUM);
+ if (base & 1)
+ base += BIAS;
+
+ addr = get_frame_memory_unsigned (this_frame, sp_addr, 8);
if (addr & 1)
addr += BIAS;
- base = addr;
for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
}
trad_frame_set_id (this_cache, frame_id_build (base, func));
}
+\f
+/* Return the address of a system call's alternative return
+ address. */
+
+static CORE_ADDR
+sparc64_linux_step_trap (struct frame_info *frame, unsigned long insn)
+{
+ if (insn == 0x91d0206d)
+ {
+ ULONGEST sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM);
+ if (sp & 1)
+ sp += BIAS;
+
+ /* The kernel puts the sigreturn registers on the stack,
+ and this is where the signal unwinding state is take from
+ when returning from a signal.
+
+ A siginfo_t sits 192 bytes from the base of the stack. This
+ siginfo_t is 128 bytes, and is followed by the sigreturn
+ register save area. The saved PC sits at a 136 byte offset
+ into there. */
+
+ return read_memory_unsigned_integer (sp + 192 + 128 + 136, 8);
+ }
+
+ return 0;
+}
+\f
+
+const struct sparc_gregset sparc64_linux_core_gregset =
+{
+ 32 * 8, /* %tstate */
+ 33 * 8, /* %tpc */
+ 34 * 8, /* %tnpc */
+ 35 * 8, /* %y */
+ -1, /* %wim */
+ -1, /* %tbr */
+ 1 * 8, /* %g1 */
+ 16 * 8, /* %l0 */
+ 8, /* y size */
+};
+\f
+
+static void
+sparc64_linux_supply_core_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ sparc64_supply_gregset (&sparc64_linux_core_gregset, regcache, regnum, gregs);
+}
+
+static void
+sparc64_linux_collect_core_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ sparc64_collect_gregset (&sparc64_linux_core_gregset, regcache, regnum, gregs);
+}
+
+static void
+sparc64_linux_supply_core_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ sparc64_supply_fpregset (regcache, regnum, fpregs);
+}
+
+static void
+sparc64_linux_collect_core_fpregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *fpregs, size_t len)
+{
+ sparc64_collect_fpregset (regcache, regnum, fpregs);
+}
+
\f
static void
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ tdep->gregset = regset_alloc (gdbarch, sparc64_linux_supply_core_gregset,
+ sparc64_linux_collect_core_gregset);
+ tdep->sizeof_gregset = 288;
+
+ tdep->fpregset = regset_alloc (gdbarch, sparc64_linux_supply_core_fpregset,
+ sparc64_linux_collect_core_fpregset);
+ tdep->sizeof_fpregset = 280;
+
tramp_frame_prepend_unwinder (gdbarch, &sparc64_linux_rt_sigframe);
+ /* Hook in the DWARF CFI frame unwinder. */
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+
sparc64_init_abi (info, gdbarch);
/* GNU/Linux has SVR4-style shared libraries... */
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
+
+ /* Make sure we can single-step over signal return system calls. */
+ tdep->step_trap = sparc64_linux_step_trap;
}
\f
projects / deliverable / binutils-gdb.git / blobdiff