-/* Target-dependent code for MIPS systems running NetBSD.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/mips.
+
+ Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
+
Contributed by Wasabi Systems, 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 "gdbcore.h"
#include "regcache.h"
+#include "regset.h"
#include "target.h"
#include "value.h"
#include "osabi.h"
+#include "gdb_assert.h"
+#include "gdb_string.h"
+
#include "nbsd-tdep.h"
#include "mipsnbsd-tdep.h"
+#include "mips-tdep.h"
#include "solib-svr4.h"
+/* Shorthand for some register numbers used below. */
+#define MIPS_PC_REGNUM MIPS_EMBED_PC_REGNUM
+#define MIPS_FP0_REGNUM MIPS_EMBED_FP0_REGNUM
+#define MIPS_FSR_REGNUM MIPS_EMBED_FP0_REGNUM + 32
+
+/* Core file support. */
+
+/* Number of registers in `struct reg' from <machine/reg.h>. */
+#define MIPSNBSD_NUM_GREGS 38
+
+/* Number of registers in `struct fpreg' from <machine/reg.h>. */
+#define MIPSNBSD_NUM_FPREGS 33
+
+/* Supply register REGNUM from the buffer specified by FPREGS and LEN
+ in the floating-point register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+mipsnbsd_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ size_t regsize = mips_isa_regsize (get_regcache_arch (regcache));
+ const char *regs = fpregs;
+ int i;
+
+ gdb_assert (len >= MIPSNBSD_NUM_FPREGS * regsize);
+
+ for (i = MIPS_FP0_REGNUM; i <= MIPS_FSR_REGNUM; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i,
+ regs + (i - MIPS_FP0_REGNUM) * regsize);
+ }
+}
+
+/* Supply register REGNUM from the buffer specified by GREGS and LEN
+ in the general-purpose register set REGSET to register cache
+ REGCACHE. If REGNUM is -1, do this for all registers in REGSET. */
+
+static void
+mipsnbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *gregs, size_t len)
+{
+ size_t regsize = mips_isa_regsize (get_regcache_arch (regcache));
+ const char *regs = gregs;
+ int i;
+
+ gdb_assert (len >= MIPSNBSD_NUM_GREGS * regsize);
+
+ for (i = 0; i <= MIPS_PC_REGNUM; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + i * regsize);
+ }
+
+ if (len >= (MIPSNBSD_NUM_GREGS + MIPSNBSD_NUM_FPREGS) * regsize)
+ {
+ regs += MIPSNBSD_NUM_GREGS * regsize;
+ len -= MIPSNBSD_NUM_GREGS * regsize;
+ mipsnbsd_supply_fpregset (regset, regcache, regnum, regs, len);
+ }
+}
+
+/* NetBSD/mips register sets. */
+
+static struct regset mipsnbsd_gregset =
+{
+ NULL,
+ mipsnbsd_supply_gregset
+};
+
+static struct regset mipsnbsd_fpregset =
+{
+ NULL,
+ mipsnbsd_supply_fpregset
+};
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+static const struct regset *
+mipsnbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ size_t regsize = mips_isa_regsize (gdbarch);
+
+ if (strcmp (sect_name, ".reg") == 0
+ && sect_size >= MIPSNBSD_NUM_GREGS * regsize)
+ return &mipsnbsd_gregset;
+
+ if (strcmp (sect_name, ".reg2") == 0
+ && sect_size >= MIPSNBSD_NUM_FPREGS * regsize)
+ return &mipsnbsd_fpregset;
+
+ return NULL;
+}
+\f
+
/* Conveniently, GDB uses the same register numbering as the
ptrace register structure used by NetBSD/mips. */
if (regno == i || regno == -1)
{
if (CANNOT_FETCH_REGISTER (i))
- supply_register (i, NULL);
+ regcache_raw_supply (current_regcache, i, NULL);
else
- supply_register (i, regs + (i * mips_regsize (current_gdbarch)));
+ regcache_raw_supply (current_regcache, i,
+ regs + (i * mips_isa_regsize (current_gdbarch)));
}
}
}
for (i = 0; i <= PC_REGNUM; i++)
if ((regno == i || regno == -1) && ! CANNOT_STORE_REGISTER (i))
- regcache_collect (i, regs + (i * mips_regsize (current_gdbarch)));
+ regcache_raw_collect (current_regcache, i,
+ regs + (i * mips_isa_regsize (current_gdbarch)));
}
void
{
int i;
- for (i = FP0_REGNUM; i <= FCRIR_REGNUM; i++)
+ for (i = FP0_REGNUM;
+ i <= mips_regnum (current_gdbarch)->fp_implementation_revision;
+ i++)
{
if (regno == i || regno == -1)
{
if (CANNOT_FETCH_REGISTER (i))
- supply_register (i, NULL);
+ regcache_raw_supply (current_regcache, i, NULL);
else
- supply_register (i, fpregs + ((i - FP0_REGNUM) * mips_regsize (current_gdbarch)));
+ regcache_raw_supply (current_regcache, i,
+ fpregs + ((i - FP0_REGNUM) * mips_isa_regsize (current_gdbarch)));
}
}
}
{
int i;
- for (i = FP0_REGNUM; i <= FCRCS_REGNUM; i++)
+ for (i = FP0_REGNUM; i <= mips_regnum (current_gdbarch)->fp_control_status;
+ i++)
if ((regno == i || regno == -1) && ! CANNOT_STORE_REGISTER (i))
- regcache_collect (i, fpregs + ((i - FP0_REGNUM) * mips_regsize (current_gdbarch)));
+ regcache_raw_collect (current_regcache, i,
+ fpregs + ((i - FP0_REGNUM) * mips_isa_regsize (current_gdbarch)));
}
-static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- char *regs, *fpregs;
-
- /* We get everything from one section. */
- if (which != 0)
- return;
-
- regs = core_reg_sect;
- fpregs = core_reg_sect + SIZEOF_STRUCT_REG;
-
- /* Integer registers. */
- mipsnbsd_supply_reg (regs, -1);
-
- /* Floating point registers. */
- mipsnbsd_supply_fpreg (fpregs, -1);
-}
-
-static void
-fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
-{
- switch (which)
- {
- case 0: /* Integer registers. */
- if (core_reg_size != SIZEOF_STRUCT_REG)
- warning ("Wrong size register set in core file.");
- else
- mipsnbsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating point registers. */
- if (core_reg_size != SIZEOF_STRUCT_FPREG)
- warning ("Wrong size register set in core file.");
- else
- mipsnbsd_supply_fpreg (core_reg_sect, -1);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
- }
-}
-
-static struct core_fns mipsnbsd_core_fns =
-{
- bfd_target_unknown_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL /* next */
-};
-
-static struct core_fns mipsnbsd_elfcore_fns =
-{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_elfcore_registers, /* core_read_registers */
- NULL /* next */
-};
-
/* Under NetBSD/mips, signal handler invocations can be identified by the
designated code sequence that is used to return from a signal handler.
In particular, the return address of a signal handler points to the
};
static LONGEST
-mipsnbsd_sigtramp_offset (CORE_ADDR pc)
+mipsnbsd_sigtramp_offset (struct frame_info *next_frame)
{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
const char *retcode = TARGET_BYTE_ORDER == BFD_ENDIAN_BIG
? sigtramp_retcode_mipseb : sigtramp_retcode_mipsel;
unsigned char ret[RETCODE_SIZE], w[4];
LONGEST off;
int i;
- if (read_memory_nobpt (pc, (char *) w, sizeof (w)) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, w, sizeof (w)))
return -1;
for (i = 0; i < RETCODE_NWORDS; i++)
off = i * 4;
pc -= off;
- if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
+ if (!safe_frame_unwind_memory (next_frame, pc, ret, sizeof (ret)))
return -1;
if (memcmp (ret, retcode, RETCODE_SIZE) == 0)
return -1;
}
-static int
-mipsnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
-{
- return (nbsd_pc_in_sigtramp (pc, func_name)
- || mipsnbsd_sigtramp_offset (pc) >= 0);
-}
-
/* Figure out where the longjmp will land. We expect that we have
- just entered longjmp and haven't yet setup the stack frame, so
- the args are still in the argument regs. A0_REGNUM points at the
+ just entered longjmp and haven't yet setup the stack frame, so the
+ args are still in the argument regs. MIPS_A0_REGNUM points at the
jmp_buf structure from which we extract the PC that we will land
at. The PC is copied into *pc. This routine returns true on
success. */
#define NBSD_MIPS_JB_PC (2 * 4)
-#define NBSD_MIPS_JB_ELEMENT_SIZE mips_regsize (current_gdbarch)
+#define NBSD_MIPS_JB_ELEMENT_SIZE mips_isa_regsize (current_gdbarch)
#define NBSD_MIPS_JB_OFFSET (NBSD_MIPS_JB_PC * \
NBSD_MIPS_JB_ELEMENT_SIZE)
buf = alloca (NBSD_MIPS_JB_ELEMENT_SIZE);
- jb_addr = read_register (A0_REGNUM);
+ jb_addr = read_register (MIPS_A0_REGNUM);
if (target_read_memory (jb_addr + NBSD_MIPS_JB_OFFSET, buf,
NBSD_MIPS_JB_ELEMENT_SIZE))
static int
mipsnbsd_cannot_fetch_register (int regno)
{
- return (regno == ZERO_REGNUM
- || regno == FCRIR_REGNUM);
+ return (regno == MIPS_ZERO_REGNUM
+ || regno == mips_regnum (current_gdbarch)->fp_implementation_revision);
}
static int
mipsnbsd_cannot_store_register (int regno)
{
- return (regno == ZERO_REGNUM
- || regno == FCRIR_REGNUM);
+ return (regno == MIPS_ZERO_REGNUM
+ || regno == mips_regnum (current_gdbarch)->fp_implementation_revision);
}
-/* NetBSD/mips uses a slightly different link_map structure from the
+/* Shared library support. */
+
+/* NetBSD/mips uses a slightly different `struct link_map' than the
other NetBSD platforms. */
+
static struct link_map_offsets *
-mipsnbsd_ilp32_solib_svr4_fetch_link_map_offsets (void)
+mipsnbsd_ilp32_fetch_link_map_offsets (void)
{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = NULL;
{
lmp = &lmo;
- lmo.r_debug_size = 16;
-
+ lmo.r_version_offset = 0;
+ lmo.r_version_size = 4;
lmo.r_map_offset = 4;
- lmo.r_map_size = 4;
+ lmo.r_ldsomap_offset = -1;
+ /* Everything we need is in the first 24 bytes. */
lmo.link_map_size = 24;
-
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 4;
-
+ lmo.l_addr_offset = 4;
+ lmo.l_addr_size = 4;
lmo.l_name_offset = 8;
- lmo.l_name_size = 4;
-
+ lmo.l_name_size = 4;
+ lmo.l_ld_offset = 12;
+ lmo.l_ld_size = 4;
lmo.l_next_offset = 16;
- lmo.l_next_size = 4;
-
+ lmo.l_next_size = 4;
lmo.l_prev_offset = 20;
- lmo.l_prev_size = 4;
+ lmo.l_prev_size = 4;
}
return lmp;
}
static struct link_map_offsets *
-mipsnbsd_lp64_solib_svr4_fetch_link_map_offsets (void)
+mipsnbsd_lp64_fetch_link_map_offsets (void)
{
static struct link_map_offsets lmo;
static struct link_map_offsets *lmp = NULL;
{
lmp = &lmo;
- lmo.r_debug_size = 32;
-
- lmo.r_map_offset = 8;
- lmo.r_map_size = 8;
+ lmo.r_version_offset = 0;
+ lmo.r_version_size = 4;
+ lmo.r_map_offset = 8;
+ lmo.r_ldsomap_offset = -1;
+ /* Everything we need is in the first 40 bytes. */
lmo.link_map_size = 48;
-
lmo.l_addr_offset = 0;
- lmo.l_addr_size = 8;
-
+ lmo.l_addr_size = 8;
lmo.l_name_offset = 16;
- lmo.l_name_size = 8;
-
+ lmo.l_name_size = 8;
+ lmo.l_ld_offset = 24;
+ lmo.l_ld_size = 8;
lmo.l_next_offset = 32;
- lmo.l_next_size = 8;
-
+ lmo.l_next_size = 8;
lmo.l_prev_offset = 40;
- lmo.l_prev_size = 8;
+ lmo.l_prev_size = 8;
}
return lmp;
}
+\f
static void
mipsnbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
- set_gdbarch_pc_in_sigtramp (gdbarch, mipsnbsd_pc_in_sigtramp);
+ set_gdbarch_regset_from_core_section
+ (gdbarch, mipsnbsd_regset_from_core_section);
set_gdbarch_get_longjmp_target (gdbarch, mipsnbsd_get_longjmp_target);
set_gdbarch_software_single_step (gdbarch, mips_software_single_step);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- gdbarch_ptr_bit (gdbarch) == 32 ?
- mipsnbsd_ilp32_solib_svr4_fetch_link_map_offsets :
- mipsnbsd_lp64_solib_svr4_fetch_link_map_offsets);
+ /* NetBSD/mips has SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, (gdbarch_ptr_bit (gdbarch) == 32 ?
+ mipsnbsd_ilp32_fetch_link_map_offsets :
+ mipsnbsd_lp64_fetch_link_map_offsets));
+}
+\f
+
+static enum gdb_osabi
+mipsnbsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_ELF;
+
+ return GDB_OSABI_UNKNOWN;
}
void
{
gdbarch_register_osabi (bfd_arch_mips, 0, GDB_OSABI_NETBSD_ELF,
mipsnbsd_init_abi);
-
- add_core_fns (&mipsnbsd_core_fns);
- add_core_fns (&mipsnbsd_elfcore_fns);
}
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