/* Target-dependent code for GNU/Linux m32r.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2007, 2008, 2009, 2010 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 "gdbcore.h"
#include "inferior.h"
#include "osabi.h"
#include "reggroups.h"
+#include "regset.h"
#include "gdb_string.h"
#include "glibc-tdep.h"
#include "solib-svr4.h"
+#include "symtab.h"
#include "trad-frame.h"
#include "frame-unwind.h"
to the ones used by the kernel. Therefore, these trampolines are
supported too. */
-static const unsigned char linux_sigtramp_code[] = {
+static const gdb_byte linux_sigtramp_code[] = {
0x67, 0x77, 0x10, 0xf2,
};
the routine. Otherwise, return 0. */
static CORE_ADDR
-m32r_linux_sigtramp_start (CORE_ADDR pc, struct frame_info *next_frame)
+m32r_linux_sigtramp_start (CORE_ADDR pc, struct frame_info *this_frame)
{
- unsigned char buf[4];
+ gdb_byte buf[4];
/* We only recognize a signal trampoline if PC is at the start of
one of the instructions. We optimize for finding the PC at the
if (pc % 2 != 0)
{
- if (!safe_frame_unwind_memory (next_frame, pc, buf, 2))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, 2))
return 0;
if (memcmp (buf, linux_sigtramp_code, 2) == 0)
return 0;
}
- if (!safe_frame_unwind_memory (next_frame, pc, buf, 4))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, 4))
return 0;
if (memcmp (buf, linux_sigtramp_code, 4) != 0)
The effect is to call the system call rt_sigreturn. */
-static const unsigned char linux_rt_sigtramp_code[] = {
+static const gdb_byte linux_rt_sigtramp_code[] = {
0x97, 0xf0, 0x00, 0xad, 0x10, 0xf2, 0xf0, 0x00,
};
of the routine. Otherwise, return 0. */
static CORE_ADDR
-m32r_linux_rt_sigtramp_start (CORE_ADDR pc, struct frame_info *next_frame)
+m32r_linux_rt_sigtramp_start (CORE_ADDR pc, struct frame_info *this_frame)
{
- unsigned char buf[4];
+ gdb_byte buf[4];
/* We only recognize a signal trampoline if PC is at the start of
one of the instructions. We optimize for finding the PC at the
if (pc % 2 != 0)
return 0;
- if (!safe_frame_unwind_memory (next_frame, pc, buf, 4))
+ if (!safe_frame_unwind_memory (this_frame, pc, buf, 4))
return 0;
if (memcmp (buf, linux_rt_sigtramp_code, 4) == 0)
{
- if (!safe_frame_unwind_memory (next_frame, pc + 4, buf, 4))
+ if (!safe_frame_unwind_memory (this_frame, pc + 4, buf, 4))
return 0;
if (memcmp (buf, linux_rt_sigtramp_code + 4, 4) == 0)
}
else if (memcmp (buf, linux_rt_sigtramp_code + 4, 4) == 0)
{
- if (!safe_frame_unwind_memory (next_frame, pc - 4, buf, 4))
+ if (!safe_frame_unwind_memory (this_frame, pc - 4, buf, 4))
return 0;
if (memcmp (buf, linux_rt_sigtramp_code, 4) == 0)
static int
m32r_linux_pc_in_sigtramp (CORE_ADDR pc, char *name,
- struct frame_info *next_frame)
+ struct frame_info *this_frame)
{
/* If we have NAME, we can optimize the search. The trampolines are
named __restore and __restore_rt. However, they aren't dynamically
be part of the preceding function. This should always be sigaction,
__sigaction, or __libc_sigaction (all aliases to the same function). */
if (name == NULL || strstr (name, "sigaction") != NULL)
- return (m32r_linux_sigtramp_start (pc, next_frame) != 0
- || m32r_linux_rt_sigtramp_start (pc, next_frame) != 0);
+ return (m32r_linux_sigtramp_start (pc, this_frame) != 0
+ || m32r_linux_rt_sigtramp_start (pc, this_frame) != 0);
return (strcmp ("__restore", name) == 0
|| strcmp ("__restore_rt", name) == 0);
};
static struct m32r_frame_cache *
-m32r_linux_sigtramp_frame_cache (struct frame_info *next_frame,
+m32r_linux_sigtramp_frame_cache (struct frame_info *this_frame,
void **this_cache)
{
struct m32r_frame_cache *cache;
return (*this_cache);
cache = FRAME_OBSTACK_ZALLOC (struct m32r_frame_cache);
(*this_cache) = cache;
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+ cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- cache->base = frame_unwind_register_unsigned (next_frame, M32R_SP_REGNUM);
+ cache->base = get_frame_register_unsigned (this_frame, M32R_SP_REGNUM);
sigcontext_addr = cache->base + 4;
- cache->pc = frame_pc_unwind (next_frame);
- addr = m32r_linux_sigtramp_start (cache->pc, next_frame);
+ cache->pc = get_frame_pc (this_frame);
+ addr = m32r_linux_sigtramp_start (cache->pc, this_frame);
if (addr == 0)
{
/* If this is a RT signal trampoline, adjust SIGCONTEXT_ADDR
accordingly. */
- addr = m32r_linux_rt_sigtramp_start (cache->pc, next_frame);
+ addr = m32r_linux_rt_sigtramp_start (cache->pc, this_frame);
if (addr)
sigcontext_addr += 128;
else
- addr = frame_func_unwind (next_frame);
+ addr = get_frame_func (this_frame);
}
cache->pc = addr;
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+ cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
for (regnum = 0; regnum < sizeof (m32r_linux_sc_reg_offset) / 4; regnum++)
{
}
static void
-m32r_linux_sigtramp_frame_this_id (struct frame_info *next_frame,
+m32r_linux_sigtramp_frame_this_id (struct frame_info *this_frame,
void **this_cache,
struct frame_id *this_id)
{
struct m32r_frame_cache *cache =
- m32r_linux_sigtramp_frame_cache (next_frame, this_cache);
+ m32r_linux_sigtramp_frame_cache (this_frame, this_cache);
(*this_id) = frame_id_build (cache->base, cache->pc);
}
-static void
-m32r_linux_sigtramp_frame_prev_register (struct frame_info *next_frame,
- void **this_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp,
- CORE_ADDR *addrp,
- int *realnump, void *valuep)
+static struct value *
+m32r_linux_sigtramp_frame_prev_register (struct frame_info *this_frame,
+ void **this_cache, int regnum)
{
struct m32r_frame_cache *cache =
- m32r_linux_sigtramp_frame_cache (next_frame, this_cache);
+ m32r_linux_sigtramp_frame_cache (this_frame, this_cache);
+
+ return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
+}
+
+static int
+m32r_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
+{
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ char *name;
- trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (m32r_linux_pc_in_sigtramp (pc, name, this_frame))
+ return 1;
+
+ return 0;
}
static const struct frame_unwind m32r_linux_sigtramp_frame_unwind = {
SIGTRAMP_FRAME,
m32r_linux_sigtramp_frame_this_id,
- m32r_linux_sigtramp_frame_prev_register
+ m32r_linux_sigtramp_frame_prev_register,
+ NULL,
+ m32r_linux_sigtramp_frame_sniffer
+};
+
+/* Mapping between the registers in `struct pt_regs'
+ format and GDB's register array layout. */
+
+static int m32r_pt_regs_offset[] = {
+ 4 * 4, /* r0 */
+ 4 * 5, /* r1 */
+ 4 * 6, /* r2 */
+ 4 * 7, /* r3 */
+ 4 * 0, /* r4 */
+ 4 * 1, /* r5 */
+ 4 * 2, /* r6 */
+ 4 * 8, /* r7 */
+ 4 * 9, /* r8 */
+ 4 * 10, /* r9 */
+ 4 * 11, /* r10 */
+ 4 * 12, /* r11 */
+ 4 * 13, /* r12 */
+ 4 * 24, /* fp */
+ 4 * 25, /* lr */
+ 4 * 23, /* sp */
+ 4 * 19, /* psw */
+ 4 * 19, /* cbr */
+ 4 * 26, /* spi */
+ 4 * 23, /* spu */
+ 4 * 22, /* bpc */
+ 4 * 20, /* pc */
+ 4 * 16, /* accl */
+ 4 * 15 /* acch */
};
-static const struct frame_unwind *
-m32r_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
+#define PSW_OFFSET (4 * 19)
+#define BBPSW_OFFSET (4 * 21)
+#define SPU_OFFSET (4 * 23)
+#define SPI_OFFSET (4 * 26)
+
+static void
+m32r_linux_supply_gregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *gregs, size_t size)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ const char *regs = gregs;
+ unsigned long psw, bbpsw;
+ int i;
- find_pc_partial_function (pc, &name, NULL, NULL);
- if (m32r_linux_pc_in_sigtramp (pc, name, next_frame))
- return &m32r_linux_sigtramp_frame_unwind;
+ psw = *((unsigned long *) (regs + PSW_OFFSET));
+ bbpsw = *((unsigned long *) (regs + BBPSW_OFFSET));
+ for (i = 0; i < sizeof (m32r_pt_regs_offset) / 4; i++)
+ {
+ if (regnum != -1 && regnum != i)
+ continue;
+
+ switch (i)
+ {
+ case PSW_REGNUM:
+ *((unsigned long *) (regs + m32r_pt_regs_offset[i])) =
+ ((0x00c1 & bbpsw) << 8) | ((0xc100 & psw) >> 8);
+ break;
+ case CBR_REGNUM:
+ *((unsigned long *) (regs + m32r_pt_regs_offset[i])) =
+ ((psw >> 8) & 1);
+ break;
+ case M32R_SP_REGNUM:
+ if (psw & 0x8000)
+ *((unsigned long *) (regs + m32r_pt_regs_offset[i])) =
+ *((unsigned long *) (regs + SPU_OFFSET));
+ else
+ *((unsigned long *) (regs + m32r_pt_regs_offset[i])) =
+ *((unsigned long *) (regs + SPI_OFFSET));
+ break;
+ }
+
+ regcache_raw_supply (regcache, i,
+ regs + m32r_pt_regs_offset[i]);
+ }
+}
+
+static struct regset m32r_linux_gregset = {
+ NULL, m32r_linux_supply_gregset
+};
+
+static const struct regset *
+m32r_linux_regset_from_core_section (struct gdbarch *core_arch,
+ const char *sect_name, size_t sect_size)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
+ if (strcmp (sect_name, ".reg") == 0)
+ return &m32r_linux_gregset;
return NULL;
}
the number of registers. */
set_gdbarch_num_regs (gdbarch, M32R_NUM_REGS - 1);
- frame_unwind_append_sniffer (gdbarch, m32r_linux_sigtramp_frame_sniffer);
+ frame_unwind_append_unwinder (gdbarch, &m32r_linux_sigtramp_frame_unwind);
/* GNU/Linux uses SVR4-style shared libraries. */
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
+
+ /* Core file support. */
+ set_gdbarch_regset_from_core_section
+ (gdbarch, m32r_linux_regset_from_core_section);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
projects / external / binutils.git / blobdiff