/* Target-dependent code for GNU/Linux m32r.
- Copyright 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004-2020 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 "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"
#include "m32r-tdep.h"
+#include "linux-tdep.h"
+#include "gdbarch.h"
+
\f
/* Recognizing signal handler frames. */
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)
{
gdb_byte buf[4];
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)
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)
{
gdb_byte buf[4];
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)
+m32r_linux_pc_in_sigtramp (CORE_ADDR pc, const char *name,
+ 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;
int regnum;
if ((*this_cache) != NULL)
- return (*this_cache);
+ return (struct m32r_frame_cache *) (*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, gdb_byte *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);
- trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, valuep);
+ return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
}
-static const struct frame_unwind m32r_linux_sigtramp_frame_unwind = {
- SIGTRAMP_FRAME,
- m32r_linux_sigtramp_frame_this_id,
- m32r_linux_sigtramp_frame_prev_register
-};
-
-static const struct frame_unwind *
-m32r_linux_sigtramp_frame_sniffer (struct frame_info *next_frame)
+static int
+m32r_linux_sigtramp_frame_sniffer (const struct frame_unwind *self,
+ struct frame_info *this_frame,
+ void **this_cache)
{
- CORE_ADDR pc = frame_pc_unwind (next_frame);
- char *name;
+ CORE_ADDR pc = get_frame_pc (this_frame);
+ const char *name;
find_pc_partial_function (pc, &name, NULL, NULL);
- if (m32r_linux_pc_in_sigtramp (pc, name, next_frame))
- return &m32r_linux_sigtramp_frame_unwind;
+ if (m32r_linux_pc_in_sigtramp (pc, name, this_frame))
+ return 1;
- return NULL;
+ return 0;
}
+static const struct frame_unwind m32r_linux_sigtramp_frame_unwind = {
+ SIGTRAMP_FRAME,
+ default_frame_unwind_stop_reason,
+ m32r_linux_sigtramp_frame_this_id,
+ 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. */
#define SPU_OFFSET (4 * 23)
#define SPI_OFFSET (4 * 26)
+#define M32R_LINUX_GREGS_SIZE (4 * 28)
+
static void
m32r_linux_supply_gregset (const struct regset *regset,
struct regcache *regcache, int regnum,
const void *gregs, size_t size)
{
- const char *regs = gregs;
- unsigned long psw, bbpsw;
+ const gdb_byte *regs = (const gdb_byte *) gregs;
+ enum bfd_endian byte_order =
+ gdbarch_byte_order (regcache->arch ());
+ ULONGEST psw, bbpsw;
+ gdb_byte buf[4];
+ const gdb_byte *p;
int i;
- psw = *((unsigned long *) (regs + PSW_OFFSET));
- bbpsw = *((unsigned long *) (regs + BBPSW_OFFSET));
+ psw = extract_unsigned_integer (regs + PSW_OFFSET, 4, byte_order);
+ bbpsw = extract_unsigned_integer (regs + BBPSW_OFFSET, 4, byte_order);
+ psw = ((0x00c1 & bbpsw) << 8) | ((0xc100 & psw) >> 8);
- for (i = 0; i < sizeof (m32r_pt_regs_offset) / 4; i++)
+ for (i = 0; i < ARRAY_SIZE (m32r_pt_regs_offset); 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);
+ store_unsigned_integer (buf, 4, byte_order, psw);
+ p = buf;
break;
case CBR_REGNUM:
- *((unsigned long *) (regs + m32r_pt_regs_offset[i])) =
- ((psw >> 8) & 1);
+ store_unsigned_integer (buf, 4, byte_order, psw & 1);
+ p = buf;
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));
+ p = regs + ((psw & 0x80) ? SPU_OFFSET : SPI_OFFSET);
break;
+ default:
+ p = regs + m32r_pt_regs_offset[i];
}
- regcache_raw_supply (current_regcache, i,
- regs + m32r_pt_regs_offset[i]);
+ regcache->raw_supply (i, p);
+ }
+}
+
+static void
+m32r_linux_collect_gregset (const struct regset *regset,
+ const struct regcache *regcache,
+ int regnum, void *gregs, size_t size)
+{
+ gdb_byte *regs = (gdb_byte *) gregs;
+ int i;
+ enum bfd_endian byte_order =
+ gdbarch_byte_order (regcache->arch ());
+ ULONGEST psw;
+ gdb_byte buf[4];
+
+ regcache->raw_collect (PSW_REGNUM, buf);
+ psw = extract_unsigned_integer (buf, 4, byte_order);
+
+ for (i = 0; i < ARRAY_SIZE (m32r_pt_regs_offset); i++)
+ {
+ if (regnum != -1 && regnum != i)
+ continue;
+
+ switch (i)
+ {
+ case PSW_REGNUM:
+ store_unsigned_integer (regs + PSW_OFFSET, 4, byte_order,
+ (psw & 0xc1) << 8);
+ store_unsigned_integer (regs + BBPSW_OFFSET, 4, byte_order,
+ (psw >> 8) & 0xc1);
+ break;
+ case CBR_REGNUM:
+ break;
+ case M32R_SP_REGNUM:
+ regcache->raw_collect
+ (i, regs + ((psw & 0x80) ? SPU_OFFSET : SPI_OFFSET));
+ break;
+ default:
+ regcache->raw_collect (i, regs + m32r_pt_regs_offset[i]);
+ }
}
}
-static struct regset m32r_linux_gregset = {
- NULL, m32r_linux_supply_gregset
+static const struct regset m32r_linux_gregset = {
+ NULL,
+ m32r_linux_supply_gregset, m32r_linux_collect_gregset
};
-static const struct regset *
-m32r_linux_regset_from_core_section (struct gdbarch *core_arch,
- const char *sect_name, size_t sect_size)
+static void
+m32r_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (core_arch);
- if (strcmp (sect_name, ".reg") == 0)
- return &m32r_linux_gregset;
- return NULL;
+ cb (".reg", M32R_LINUX_GREGS_SIZE, M32R_LINUX_GREGS_SIZE, &m32r_linux_gregset,
+ NULL, cb_data);
}
static void
m32r_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ linux_init_abi (info, gdbarch);
/* Since EVB register is not available for native debug, we reduce
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);
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, m32r_linux_iterate_over_regset_sections);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern void _initialize_m32r_linux_tdep (void);
-
+void _initialize_m32r_linux_tdep ();
void
-_initialize_m32r_linux_tdep (void)
+_initialize_m32r_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_m32r, 0, GDB_OSABI_LINUX,
m32r_linux_init_abi);
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