/* Target-dependent code for GNU/Linux SPARC.
- Copyright 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., 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 "dwarf2-frame.h"
#include "frame.h"
#include "frame-unwind.h"
+#include "gdbtypes.h"
+#include "regset.h"
#include "gdbarch.h"
#include "gdbcore.h"
#include "osabi.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 + 20;
+ sp_addr = base + 16 + ((SPARC_SP_REGNUM - SPARC_G0_REGNUM) * 4);
for (regnum = SPARC_G1_REGNUM; regnum <= SPARC_O7_REGNUM; regnum++)
{
trad_frame_set_reg_addr (this_cache, regnum, addr);
addr += 4;
}
- base = addr = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ base = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ addr = get_frame_memory_unsigned (next_frame, sp_addr, 4);
+
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
+sparc32_linux_step_trap (struct frame_info *frame, unsigned long insn)
+{
+ if (insn == 0x91d02010)
+ {
+ ULONGEST sc_num = get_frame_register_unsigned (frame, SPARC_G1_REGNUM);
+
+ /* __NR_rt_sigreturn is 101 and __NR_sigreturn is 216 */
+ if (sc_num == 101 || sc_num == 216)
+ {
+ ULONGEST sp, pc_offset;
+
+ sp = get_frame_register_unsigned (frame, SPARC_SP_REGNUM);
+
+ /* 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.
+
+ For __NR_sigreturn, this register area sits 96 bytes from
+ the base of the stack. The saved PC sits 4 bytes into the
+ sigreturn register save area.
+
+ For __NR_rt_sigreturn a siginfo_t, which is 128 bytes, sits
+ right before the sigreturn register save area. */
+
+ pc_offset = 96 + 4;
+ if (sc_num == 101)
+ pc_offset += 128;
+
+ return read_memory_unsigned_integer (sp + pc_offset, 4);
+ }
+ }
+
+ return 0;
+}
+\f
+
+const struct sparc_gregset sparc32_linux_core_gregset =
+{
+ 32 * 4, /* %psr */
+ 33 * 4, /* %pc */
+ 34 * 4, /* %npc */
+ 35 * 4, /* %y */
+ -1, /* %wim */
+ -1, /* %tbr */
+ 1 * 4, /* %g1 */
+ 16 * 4, /* %l0 */
+ 4, /* y size */
+};
+\f
+
+static void
+sparc32_linux_supply_core_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ sparc32_supply_gregset (&sparc32_linux_core_gregset, regcache, regnum, gregs);
+}
+
+static void
+sparc32_linux_collect_core_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t len)
+{
+ sparc32_collect_gregset (&sparc32_linux_core_gregset, regcache, regnum, gregs);
+}
+
+static void
+sparc32_linux_supply_core_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ sparc32_supply_fpregset (regcache, regnum, fpregs);
+}
+
+static void
+sparc32_linux_collect_core_fpregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *fpregs, size_t len)
+{
+ sparc32_collect_fpregset (regcache, regnum, fpregs);
+}
+
\f
static void
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ tdep->gregset = regset_alloc (gdbarch, sparc32_linux_supply_core_gregset,
+ sparc32_linux_collect_core_gregset);
+ tdep->sizeof_gregset = 152;
+
+ tdep->fpregset = regset_alloc (gdbarch, sparc32_linux_supply_core_fpregset,
+ sparc32_linux_collect_core_fpregset);
+ tdep->sizeof_fpregset = 396;
+
tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &sparc32_linux_rt_sigframe);
/* GNU/Linux doesn't support the 128-bit `long double' from the psABI. */
set_gdbarch_long_double_bit (gdbarch, 64);
- set_gdbarch_long_double_format (gdbarch, &floatformat_ieee_double_big);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
/* 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 = sparc32_linux_step_trap;
+
+ /* Hook in the DWARF CFI frame unwinder. */
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
projects / deliverable / binutils-gdb.git / blobdiff