/* Target-dependent code for GNU/Linux UltraSPARC.
- Copyright 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#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"
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);
/* 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 = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ if (base & 1)
+ base += BIAS;
+
+ addr = get_frame_memory_unsigned (next_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 (unsigned long insn)
+{
+ if (insn == 0x91d0206d)
+ {
+ ULONGEST sp;
+
+ regcache_cooked_read_unsigned (current_regcache,
+ SPARC_SP_REGNUM, &sp);
+ 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... */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
/* 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