X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Falphanbsd-tdep.c;h=11179c25c4f2837586da4d51e8a589e03d9c9c5f;hb=e17a4113357102b55cfa5b80557d590a46a43300;hp=c29b3f92fdc8a06115eee8e291e1aea830f2b76c;hpb=6c72f9f97456e7309006148460d9a2aee4088016;p=deliverable%2Fbinutils-gdb.git
diff --git a/gdb/alphanbsd-tdep.c b/gdb/alphanbsd-tdep.c
index c29b3f92fd..11179c25c4 100644
--- a/gdb/alphanbsd-tdep.c
+++ b/gdb/alphanbsd-tdep.c
@@ -1,12 +1,15 @@
-/* Target-dependent code for NetBSD/Alpha.
- Copyright 2002 Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/alpha.
+
+ Copyright (C) 2002, 2003, 2004, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
+
Contributed by Wasabi Systems, 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,
@@ -15,58 +18,172 @@
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 . */
#include "defs.h"
+#include "frame.h"
#include "gdbcore.h"
+#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
#include "value.h"
-#include "solib-svr4.h"
+
+#include "gdb_assert.h"
+#include "gdb_string.h"
#include "alpha-tdep.h"
+#include "alphabsd-tdep.h"
+#include "nbsd-tdep.h"
+#include "solib-svr4.h"
+#include "target.h"
+
+/* Core file support. */
+
+/* Even though NetBSD/alpha used ELF since day one, it used the
+ traditional a.out-style core dump format before NetBSD 1.6. */
+
+/* Sizeof `struct reg' in . */
+#define ALPHANBSD_SIZEOF_GREGS (32 * 8)
-/* Fetch (and possibly build) an appropriate link_map_offsets
- structure for NetBSD/alpha targets using the struct offsets
- defined in (but without actual reference to that file).
+/* Sizeof `struct fpreg' in = ALPHANBSD_SIZEOF_FPREGS);
+
+ for (i = ALPHA_FP0_REGNUM; i < ALPHA_FP0_REGNUM + 31; i++)
{
- lmp = &lmo;
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + (i - ALPHA_FP0_REGNUM) * 8);
+ }
+
+ if (regnum == ALPHA_FPCR_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_FPCR_REGNUM, regs + 32 * 8);
+}
+
+/* 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. */
- lmo.r_debug_size = 32;
+static void
+alphanbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const gdb_byte *regs = gregs;
+ int i;
- lmo.r_map_offset = 8;
- lmo.r_map_size = 8;
+ gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
- lmo.link_map_size = 40;
+ for (i = 0; i < ALPHA_ZERO_REGNUM; i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + i * 8);
+ }
- lmo.l_addr_offset = 0;
- lmo.l_addr_size = 8;
+ if (regnum == ALPHA_PC_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
+}
- lmo.l_name_offset = 8;
- lmo.l_name_size = 8;
+/* 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. */
- lmo.l_next_offset = 24;
- lmo.l_next_size = 8;
+static void
+alphanbsd_aout_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const gdb_byte *regs = gregs;
+ int i;
- lmo.l_prev_offset = 32;
- lmo.l_prev_size = 8;
+ /* Table to map a GDB register number to a trapframe register index. */
+ static const int regmap[] =
+ {
+ 0, 1, 2, 3,
+ 4, 5, 6, 7,
+ 8, 9, 10, 11,
+ 12, 13, 14, 15,
+ 30, 31, 32, 16,
+ 17, 18, 19, 20,
+ 21, 22, 23, 24,
+ 25, 29, 26
+ };
+
+ gdb_assert (len >= ALPHANBSD_SIZEOF_GREGS);
+
+ for (i = 0; i < ARRAY_SIZE(regmap); i++)
+ {
+ if (regnum == i || regnum == -1)
+ regcache_raw_supply (regcache, i, regs + regmap[i] * 8);
}
- return lmp;
+ if (regnum == ALPHA_PC_REGNUM || regnum == -1)
+ regcache_raw_supply (regcache, ALPHA_PC_REGNUM, regs + 31 * 8);
+
+ if (len >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
+ {
+ regs += ALPHANBSD_SIZEOF_GREGS;
+ len -= ALPHANBSD_SIZEOF_GREGS;
+ alphanbsd_supply_fpregset (regset, regcache, regnum, regs, len);
+ }
}
+/* NetBSD/alpha register sets. */
+
+static struct regset alphanbsd_gregset =
+{
+ NULL,
+ alphanbsd_supply_gregset
+};
+
+static struct regset alphanbsd_fpregset =
+{
+ NULL,
+ alphanbsd_supply_fpregset
+};
+
+static struct regset alphanbsd_aout_gregset =
+{
+ NULL,
+ alphanbsd_aout_supply_gregset
+};
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+const struct regset *
+alphanbsd_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name, size_t sect_size)
+{
+ if (strcmp (sect_name, ".reg") == 0 && sect_size >= ALPHANBSD_SIZEOF_GREGS)
+ {
+ if (sect_size >= ALPHANBSD_SIZEOF_GREGS + ALPHANBSD_SIZEOF_FPREGS)
+ return &alphanbsd_aout_gregset;
+ else
+ return &alphanbsd_gregset;
+ }
+
+ if (strcmp (sect_name, ".reg2") == 0 && sect_size >= ALPHANBSD_SIZEOF_FPREGS)
+ return &alphanbsd_fpregset;
+
+ return NULL;
+}
+
+
+/* Signal trampolines. */
+
/* Under NetBSD/alpha, 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
@@ -83,29 +200,29 @@ alphanbsd_solib_svr4_fetch_link_map_offsets (void)
sequence and can then check whether we really are executing in the
signal trampoline. If not, -1 is returned, otherwise the offset from the
start of the return sequence is returned. */
-static const unsigned int sigtramp_retcode[] =
+static const unsigned char sigtramp_retcode[] =
{
- 0xa61e0000, /* ldq a0, 0(sp) */
- 0x23de0010, /* lda sp, 16(sp) */
- 0x201f0127, /* lda v0, 295(zero) */
- 0x00000083, /* call_pal callsys */
+ 0x00, 0x00, 0x1e, 0xa6, /* ldq a0, 0(sp) */
+ 0x10, 0x00, 0xde, 0x23, /* lda sp, 16(sp) */
+ 0x27, 0x01, 0x1f, 0x20, /* lda v0, 295(zero) */
+ 0x83, 0x00, 0x00, 0x00, /* call_pal callsys */
};
-#define RETCODE_NWORDS \
- (sizeof (sigtramp_retcode) / sizeof (sigtramp_retcode[0]))
+#define RETCODE_NWORDS 4
+#define RETCODE_SIZE (RETCODE_NWORDS * 4)
-LONGEST
-alphanbsd_sigtramp_offset (CORE_ADDR pc)
+static LONGEST
+alphanbsd_sigtramp_offset (struct gdbarch *gdbarch, CORE_ADDR pc)
{
- unsigned int ret[4], w;
+ unsigned char ret[RETCODE_SIZE], w[4];
LONGEST off;
int i;
- if (read_memory_nobpt (pc, (char *) &w, 4) != 0)
+ if (target_read_memory (pc, (char *) w, 4) != 0)
return -1;
for (i = 0; i < RETCODE_NWORDS; i++)
{
- if (w == sigtramp_retcode[i])
+ if (memcmp (w, sigtramp_retcode + (i * 4), 4) == 0)
break;
}
if (i == RETCODE_NWORDS)
@@ -114,41 +231,87 @@ alphanbsd_sigtramp_offset (CORE_ADDR pc)
off = i * 4;
pc -= off;
- if (read_memory_nobpt (pc, (char *) ret, sizeof (ret)) != 0)
+ if (target_read_memory (pc, (char *) ret, sizeof (ret)) != 0)
return -1;
- if (memcmp (ret, sigtramp_retcode, sizeof (sigtramp_retcode)) == 0)
+ if (memcmp (ret, sigtramp_retcode, RETCODE_SIZE) == 0)
return off;
return -1;
}
static int
-alphanbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
+alphanbsd_pc_in_sigtramp (struct gdbarch *gdbarch,
+ CORE_ADDR pc, char *func_name)
{
- return (alphanbsd_sigtramp_offset (pc) >= 0);
+ return (nbsd_pc_in_sigtramp (pc, func_name)
+ || alphanbsd_sigtramp_offset (gdbarch, pc) >= 0);
}
+static CORE_ADDR
+alphanbsd_sigcontext_addr (struct frame_info *frame)
+{
+ /* FIXME: This is not correct for all versions of NetBSD/alpha.
+ We will probably need to disassemble the trampoline to figure
+ out which trampoline frame type we have. */
+ if (!get_next_frame (frame))
+ return 0;
+ return get_frame_base (get_next_frame (frame));
+}
+
+
static void
alphanbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- set_gdbarch_pc_in_sigtramp (gdbarch, alphanbsd_pc_in_sigtramp);
+ /* Hook into the DWARF CFI frame unwinder. */
+ alpha_dwarf2_init_abi (info, gdbarch);
+
+ /* Hook into the MDEBUG frame unwinder. */
+ alpha_mdebug_init_abi (info, gdbarch);
/* NetBSD/alpha does not provide single step support via ptrace(2); we
must use software single-stepping. */
set_gdbarch_software_single_step (gdbarch, alpha_software_single_step);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- alphanbsd_solib_svr4_fetch_link_map_offsets);
+ /* NetBSD/alpha has SVR4-style shared libraries. */
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
tdep->dynamic_sigtramp_offset = alphanbsd_sigtramp_offset;
+ tdep->pc_in_sigtramp = alphanbsd_pc_in_sigtramp;
+ tdep->sigcontext_addr = alphanbsd_sigcontext_addr;
+
+ tdep->jb_pc = 2;
+ tdep->jb_elt_size = 8;
+
+ set_gdbarch_regset_from_core_section
+ (gdbarch, alphanbsd_regset_from_core_section);
}
+
+
+static enum gdb_osabi
+alphanbsd_core_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_ELF;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_alphanbsd_tdep (void);
void
_initialize_alphanbsd_tdep (void)
{
- alpha_gdbarch_register_os_abi (ALPHA_ABI_NETBSD, alphanbsd_init_abi);
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_alpha, bfd_target_unknown_flavour,
+ alphanbsd_core_osabi_sniffer);
+
+ gdbarch_register_osabi (bfd_arch_alpha, 0, GDB_OSABI_NETBSD_ELF,
+ alphanbsd_init_abi);
}