/* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
- Copyright 1986, 1987, 1989, 1991, 1992, 1994, 1995, 1996, 1997, 1998
- Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008
+ Free Software Foundation, Inc.
-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
-(at your option) any later version.
+ This file is part of GDB.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ 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 3 of the License, or
+ (at your option) any later version.
-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. */
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "inferior.h"
#include "xcoffsolib.h"
#include "symfile.h"
#include "objfiles.h"
-#include "libbfd.h" /* For bfd_cache_lookup (FIXME) */
+#include "libbfd.h" /* For bfd_default_set_arch_mach (FIXME) */
#include "bfd.h"
+#include "exceptions.h"
#include "gdb-stabs.h"
+#include "regcache.h"
+#include "arch-utils.h"
+#include "inf-ptrace.h"
+#include "ppc-tdep.h"
+#include "rs6000-tdep.h"
+#include "exec.h"
+#include "observer.h"
#include <sys/ptrace.h>
#include <sys/reg.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <fcntl.h>
+#include <errno.h>
#include <a.out.h>
#include <sys/file.h>
#include "gdb_stat.h"
#include <sys/core.h>
+#define __LDINFO_PTRACE32__ /* for __ld_info32 */
+#define __LDINFO_PTRACE64__ /* for __ld_info64 */
#include <sys/ldr.h>
+#include <sys/systemcfg.h>
-extern int errno;
+/* On AIX4.3+, sys/ldr.h provides different versions of struct ld_info for
+ debugging 32-bit and 64-bit processes. Define a typedef and macros for
+ accessing fields in the appropriate structures. */
-extern struct vmap * map_vmap PARAMS ((bfd *bf, bfd *arch));
+/* In 32-bit compilation mode (which is the only mode from which ptrace()
+ works on 4.3), __ld_info32 is #defined as equivalent to ld_info. */
-extern struct target_ops exec_ops;
+#ifdef __ld_info32
+# define ARCH3264
+#endif
-static void
-vmap_exec PARAMS ((void));
+/* Return whether the current architecture is 64-bit. */
-static void
-vmap_ldinfo PARAMS ((struct ld_info *));
+#ifndef ARCH3264
+# define ARCH64() 0
+#else
+# define ARCH64() (register_size (current_gdbarch, 0) == 8)
+#endif
-static struct vmap *
-add_vmap PARAMS ((struct ld_info *));
+/* Union of 32-bit and 64-bit versions of ld_info. */
-static int
-objfile_symbol_add PARAMS ((char *));
+typedef union {
+#ifndef ARCH3264
+ struct ld_info l32;
+ struct ld_info l64;
+#else
+ struct __ld_info32 l32;
+ struct __ld_info64 l64;
+#endif
+} LdInfo;
-static void
-vmap_symtab PARAMS ((struct vmap *));
+/* If compiling with 32-bit and 64-bit debugging capability (e.g. AIX 4.x),
+ declare and initialize a variable named VAR suitable for use as the arch64
+ parameter to the various LDI_*() macros. */
-static void
-fetch_core_registers PARAMS ((char *, unsigned int, int, CORE_ADDR));
+#ifndef ARCH3264
+# define ARCH64_DECL(var)
+#else
+# define ARCH64_DECL(var) int var = ARCH64 ()
+#endif
-static void
-exec_one_dummy_insn PARAMS ((void));
+/* Return LDI's FIELD for a 64-bit process if ARCH64 and for a 32-bit process
+ otherwise. This technique only works for FIELDs with the same data type in
+ 32-bit and 64-bit versions of ld_info. */
+
+#ifndef ARCH3264
+# define LDI_FIELD(ldi, arch64, field) (ldi)->l32.ldinfo_##field
+#else
+# define LDI_FIELD(ldi, arch64, field) \
+ (arch64 ? (ldi)->l64.ldinfo_##field : (ldi)->l32.ldinfo_##field)
+#endif
-extern void
-fixup_breakpoints PARAMS ((CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta));
+/* Return various LDI fields for a 64-bit process if ARCH64 and for a 32-bit
+ process otherwise. */
-/* Conversion from gdb-to-system special purpose register numbers.. */
+#define LDI_NEXT(ldi, arch64) LDI_FIELD(ldi, arch64, next)
+#define LDI_FD(ldi, arch64) LDI_FIELD(ldi, arch64, fd)
+#define LDI_FILENAME(ldi, arch64) LDI_FIELD(ldi, arch64, filename)
-static int special_regs[] = {
- IAR, /* PC_REGNUM */
- MSR, /* PS_REGNUM */
- CR, /* CR_REGNUM */
- LR, /* LR_REGNUM */
- CTR, /* CTR_REGNUM */
- XER, /* XER_REGNUM */
- MQ /* MQ_REGNUM */
-};
+extern struct vmap *map_vmap (bfd * bf, bfd * arch);
-void
-fetch_inferior_registers (regno)
- int regno;
-{
- int ii;
- extern char registers[];
+static void vmap_exec (void);
- if (regno < 0) { /* for all registers */
+static void vmap_ldinfo (LdInfo *);
- /* read 32 general purpose registers. */
+static struct vmap *add_vmap (LdInfo *);
- for (ii=0; ii < 32; ++ii)
- *(int*)®isters[REGISTER_BYTE (ii)] =
- ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii, 0, 0);
+static int objfile_symbol_add (void *);
- /* read general purpose floating point registers. */
+static void vmap_symtab (struct vmap *);
- for (ii=0; ii < 32; ++ii)
- ptrace (PT_READ_FPR, inferior_pid,
- (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (FP0_REGNUM+ii)],
- FPR0+ii, 0);
+static void exec_one_dummy_insn (struct gdbarch *);
- /* read special registers. */
- for (ii=0; ii <= LAST_UISA_SP_REGNUM-FIRST_UISA_SP_REGNUM; ++ii)
- *(int*)®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM+ii)] =
- ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) special_regs[ii],
- 0, 0);
+extern void fixup_breakpoints (CORE_ADDR low, CORE_ADDR high, CORE_ADDR delta);
- registers_fetched ();
- return;
- }
-
- /* else an individual register is addressed. */
-
- else if (regno < FP0_REGNUM) { /* a GPR */
- *(int*)®isters[REGISTER_BYTE (regno)] =
- ptrace (PT_READ_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno, 0, 0);
- }
- else if (regno <= FPLAST_REGNUM) { /* a FPR */
- ptrace (PT_READ_FPR, inferior_pid,
- (PTRACE_ARG3_TYPE) ®isters [REGISTER_BYTE (regno)],
- (regno-FP0_REGNUM+FPR0), 0);
- }
- else if (regno <= LAST_UISA_SP_REGNUM) { /* a special register */
- *(int*)®isters[REGISTER_BYTE (regno)] =
- ptrace (PT_READ_GPR, inferior_pid,
- (PTRACE_ARG3_TYPE) special_regs[regno-FIRST_UISA_SP_REGNUM],
- 0, 0);
- }
+/* Given REGNO, a gdb register number, return the corresponding
+ number suitable for use as a ptrace() parameter. Return -1 if
+ there's no suitable mapping. Also, set the int pointed to by
+ ISFLOAT to indicate whether REGNO is a floating point register. */
+
+static int
+regmap (struct gdbarch *gdbarch, int regno, int *isfloat)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ *isfloat = 0;
+ if (tdep->ppc_gp0_regnum <= regno
+ && regno < tdep->ppc_gp0_regnum + ppc_num_gprs)
+ return regno;
+ else if (tdep->ppc_fp0_regnum >= 0
+ && tdep->ppc_fp0_regnum <= regno
+ && regno < tdep->ppc_fp0_regnum + ppc_num_fprs)
+ {
+ *isfloat = 1;
+ return regno - tdep->ppc_fp0_regnum + FPR0;
+ }
+ else if (regno == gdbarch_pc_regnum (gdbarch))
+ return IAR;
+ else if (regno == tdep->ppc_ps_regnum)
+ return MSR;
+ else if (regno == tdep->ppc_cr_regnum)
+ return CR;
+ else if (regno == tdep->ppc_lr_regnum)
+ return LR;
+ else if (regno == tdep->ppc_ctr_regnum)
+ return CTR;
+ else if (regno == tdep->ppc_xer_regnum)
+ return XER;
+ else if (tdep->ppc_fpscr_regnum >= 0
+ && regno == tdep->ppc_fpscr_regnum)
+ return FPSCR;
+ else if (tdep->ppc_mq_regnum >= 0 && regno == tdep->ppc_mq_regnum)
+ return MQ;
else
- fprintf_unfiltered (gdb_stderr,
- "gdb error: register no %d not implemented.\n",
- regno);
+ return -1;
+}
- register_valid [regno] = 1;
+/* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
+
+static int
+rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
+{
+ int ret = ptrace (req, id, (int *)addr, data, buf);
+#if 0
+ printf ("rs6000_ptrace32 (%d, %d, 0x%x, %08x, 0x%x) = 0x%x\n",
+ req, id, (unsigned int)addr, data, (unsigned int)buf, ret);
+#endif
+ return ret;
}
-/* Store our register values back into the inferior.
- If REGNO is -1, do this for all registers.
- Otherwise, REGNO specifies which register (so we can save time). */
+/* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
-void
-store_inferior_registers (regno)
- int regno;
+static int
+rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf)
+{
+#ifdef ARCH3264
+ int ret = ptracex (req, id, addr, data, buf);
+#else
+ int ret = 0;
+#endif
+#if 0
+ printf ("rs6000_ptrace64 (%d, %d, 0x%llx, %08x, 0x%x) = 0x%x\n",
+ req, id, addr, data, (unsigned int)buf, ret);
+#endif
+ return ret;
+}
+
+/* Fetch register REGNO from the inferior. */
+
+static void
+fetch_register (struct regcache *regcache, int regno)
{
- extern char registers[];
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ int addr[MAX_REGISTER_SIZE];
+ int nr, isfloat;
+ /* Retrieved values may be -1, so infer errors from errno. */
errno = 0;
- if (regno == -1)
- { /* for all registers.. */
- int ii;
+ nr = regmap (gdbarch, regno, &isfloat);
- /* execute one dummy instruction (which is a breakpoint) in inferior
- process. So give kernel a chance to do internal house keeping.
- Otherwise the following ptrace(2) calls will mess up user stack
- since kernel will get confused about the bottom of the stack (%sp) */
+ /* Floating-point registers. */
+ if (isfloat)
+ rs6000_ptrace32 (PT_READ_FPR, PIDGET (inferior_ptid), addr, nr, 0);
- exec_one_dummy_insn ();
+ /* Bogus register number. */
+ else if (nr < 0)
+ {
+ if (regno >= gdbarch_num_regs (gdbarch))
+ fprintf_unfiltered (gdb_stderr,
+ "gdb error: register no %d not implemented.\n",
+ regno);
+ return;
+ }
- /* write general purpose registers first! */
- for ( ii=GPR0; ii<=GPR31; ++ii)
+ /* Fixed-point registers. */
+ else
+ {
+ if (!ARCH64 ())
+ *addr = rs6000_ptrace32 (PT_READ_GPR, PIDGET (inferior_ptid), (int *)nr, 0, 0);
+ else
{
- ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) ii,
- *(int*)®isters[REGISTER_BYTE (ii)], 0);
- if (errno)
- {
- perror ("ptrace write_gpr");
- errno = 0;
- }
+ /* PT_READ_GPR requires the buffer parameter to point to long long,
+ even if the register is really only 32 bits. */
+ long long buf;
+ rs6000_ptrace64 (PT_READ_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
+ if (register_size (gdbarch, regno) == 8)
+ memcpy (addr, &buf, 8);
+ else
+ *addr = buf;
}
+ }
+
+ if (!errno)
+ regcache_raw_supply (regcache, regno, (char *) addr);
+ else
+ {
+#if 0
+ /* FIXME: this happens 3 times at the start of each 64-bit program. */
+ perror ("ptrace read");
+#endif
+ errno = 0;
+ }
+}
+
+/* Store register REGNO back into the inferior. */
+
+static void
+store_register (const struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ int addr[MAX_REGISTER_SIZE];
+ int nr, isfloat;
+
+ /* Fetch the register's value from the register cache. */
+ regcache_raw_collect (regcache, regno, addr);
+
+ /* -1 can be a successful return value, so infer errors from errno. */
+ errno = 0;
+
+ nr = regmap (gdbarch, regno, &isfloat);
+
+ /* Floating-point registers. */
+ if (isfloat)
+ rs6000_ptrace32 (PT_WRITE_FPR, PIDGET (inferior_ptid), addr, nr, 0);
+
+ /* Bogus register number. */
+ else if (nr < 0)
+ {
+ if (regno >= gdbarch_num_regs (gdbarch))
+ fprintf_unfiltered (gdb_stderr,
+ "gdb error: register no %d not implemented.\n",
+ regno);
+ }
- /* write floating point registers now. */
- for ( ii=0; ii < 32; ++ii)
+ /* Fixed-point registers. */
+ else
+ {
+ if (regno == gdbarch_sp_regnum (gdbarch))
+ /* Execute one dummy instruction (which is a breakpoint) in inferior
+ process to give kernel a chance to do internal housekeeping.
+ Otherwise the following ptrace(2) calls will mess up user stack
+ since kernel will get confused about the bottom of the stack
+ (%sp). */
+ exec_one_dummy_insn (gdbarch);
+
+ /* The PT_WRITE_GPR operation is rather odd. For 32-bit inferiors,
+ the register's value is passed by value, but for 64-bit inferiors,
+ the address of a buffer containing the value is passed. */
+ if (!ARCH64 ())
+ rs6000_ptrace32 (PT_WRITE_GPR, PIDGET (inferior_ptid), (int *)nr, *addr, 0);
+ else
{
- ptrace (PT_WRITE_FPR, inferior_pid,
- (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (FP0_REGNUM+ii)],
- FPR0+ii, 0);
- if (errno)
- {
- perror ("ptrace write_fpr");
- errno = 0;
- }
+ /* PT_WRITE_GPR requires the buffer parameter to point to an 8-byte
+ area, even if the register is really only 32 bits. */
+ long long buf;
+ if (register_size (gdbarch, regno) == 8)
+ memcpy (&buf, addr, 8);
+ else
+ buf = *addr;
+ rs6000_ptrace64 (PT_WRITE_GPR, PIDGET (inferior_ptid), nr, 0, &buf);
}
+ }
+
+ if (errno)
+ {
+ perror ("ptrace write");
+ errno = 0;
+ }
+}
+
+/* Read from the inferior all registers if REGNO == -1 and just register
+ REGNO otherwise. */
+
+static void
+rs6000_fetch_inferior_registers (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regno != -1)
+ fetch_register (regcache, regno);
- /* write special registers. */
- for (ii=0; ii <= LAST_UISA_SP_REGNUM-FIRST_UISA_SP_REGNUM; ++ii)
+ else
+ {
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Read 32 general purpose registers. */
+ for (regno = tdep->ppc_gp0_regnum;
+ regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
+ regno++)
{
- ptrace (PT_WRITE_GPR, inferior_pid,
- (PTRACE_ARG3_TYPE) special_regs[ii],
- *(int*)®isters[REGISTER_BYTE (FIRST_UISA_SP_REGNUM+ii)],
- 0);
- if (errno)
- {
- perror ("ptrace write_gpr");
- errno = 0;
- }
+ fetch_register (regcache, regno);
}
+
+ /* Read general purpose floating point registers. */
+ if (tdep->ppc_fp0_regnum >= 0)
+ for (regno = 0; regno < ppc_num_fprs; regno++)
+ fetch_register (regcache, tdep->ppc_fp0_regnum + regno);
+
+ /* Read special registers. */
+ fetch_register (regcache, gdbarch_pc_regnum (gdbarch));
+ fetch_register (regcache, tdep->ppc_ps_regnum);
+ fetch_register (regcache, tdep->ppc_cr_regnum);
+ fetch_register (regcache, tdep->ppc_lr_regnum);
+ fetch_register (regcache, tdep->ppc_ctr_regnum);
+ fetch_register (regcache, tdep->ppc_xer_regnum);
+ if (tdep->ppc_fpscr_regnum >= 0)
+ fetch_register (regcache, tdep->ppc_fpscr_regnum);
+ if (tdep->ppc_mq_regnum >= 0)
+ fetch_register (regcache, tdep->ppc_mq_regnum);
}
+}
+
+/* Store our register values back into the inferior.
+ If REGNO is -1, do this for all registers.
+ Otherwise, REGNO specifies which register (so we can save time). */
- /* else, a specific register number is given... */
+static void
+rs6000_store_inferior_registers (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ if (regno != -1)
+ store_register (regcache, regno);
- else if (regno < FP0_REGNUM) /* a GPR */
+ else
{
- ptrace (PT_WRITE_GPR, inferior_pid, (PTRACE_ARG3_TYPE) regno,
- *(int*)®isters[REGISTER_BYTE (regno)], 0);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Write general purpose registers first. */
+ for (regno = tdep->ppc_gp0_regnum;
+ regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
+ regno++)
+ {
+ store_register (regcache, regno);
+ }
+
+ /* Write floating point registers. */
+ if (tdep->ppc_fp0_regnum >= 0)
+ for (regno = 0; regno < ppc_num_fprs; regno++)
+ store_register (regcache, tdep->ppc_fp0_regnum + regno);
+
+ /* Write special registers. */
+ store_register (regcache, gdbarch_pc_regnum (gdbarch));
+ store_register (regcache, tdep->ppc_ps_regnum);
+ store_register (regcache, tdep->ppc_cr_regnum);
+ store_register (regcache, tdep->ppc_lr_regnum);
+ store_register (regcache, tdep->ppc_ctr_regnum);
+ store_register (regcache, tdep->ppc_xer_regnum);
+ if (tdep->ppc_fpscr_regnum >= 0)
+ store_register (regcache, tdep->ppc_fpscr_regnum);
+ if (tdep->ppc_mq_regnum >= 0)
+ store_register (regcache, tdep->ppc_mq_regnum);
}
+}
+
- else if (regno <= FPLAST_REGNUM) /* a FPR */
+/* Attempt a transfer all LEN bytes starting at OFFSET between the
+ inferior's OBJECT:ANNEX space and GDB's READBUF/WRITEBUF buffer.
+ Return the number of bytes actually transferred. */
+
+static LONGEST
+rs6000_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len)
+{
+ pid_t pid = ptid_get_pid (inferior_ptid);
+ int arch64 = ARCH64 ();
+
+ switch (object)
{
- ptrace (PT_WRITE_FPR, inferior_pid,
- (PTRACE_ARG3_TYPE) ®isters[REGISTER_BYTE (regno)],
- regno - FP0_REGNUM + FPR0, 0);
+ case TARGET_OBJECT_MEMORY:
+ {
+ union
+ {
+ PTRACE_TYPE_RET word;
+ gdb_byte byte[sizeof (PTRACE_TYPE_RET)];
+ } buffer;
+ ULONGEST rounded_offset;
+ LONGEST partial_len;
+
+ /* Round the start offset down to the next long word
+ boundary. */
+ rounded_offset = offset & -(ULONGEST) sizeof (PTRACE_TYPE_RET);
+
+ /* Since ptrace will transfer a single word starting at that
+ rounded_offset the partial_len needs to be adjusted down to
+ that (remember this function only does a single transfer).
+ Should the required length be even less, adjust it down
+ again. */
+ partial_len = (rounded_offset + sizeof (PTRACE_TYPE_RET)) - offset;
+ if (partial_len > len)
+ partial_len = len;
+
+ if (writebuf)
+ {
+ /* If OFFSET:PARTIAL_LEN is smaller than
+ ROUNDED_OFFSET:WORDSIZE then a read/modify write will
+ be needed. Read in the entire word. */
+ if (rounded_offset < offset
+ || (offset + partial_len
+ < rounded_offset + sizeof (PTRACE_TYPE_RET)))
+ {
+ /* Need part of initial word -- fetch it. */
+ if (arch64)
+ buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
+ rounded_offset, 0, NULL);
+ else
+ buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
+ (int *)(uintptr_t)rounded_offset,
+ 0, NULL);
+ }
+
+ /* Copy data to be written over corresponding part of
+ buffer. */
+ memcpy (buffer.byte + (offset - rounded_offset),
+ writebuf, partial_len);
+
+ errno = 0;
+ if (arch64)
+ rs6000_ptrace64 (PT_WRITE_D, pid,
+ rounded_offset, buffer.word, NULL);
+ else
+ rs6000_ptrace32 (PT_WRITE_D, pid,
+ (int *)(uintptr_t)rounded_offset, buffer.word, NULL);
+ if (errno)
+ return 0;
+ }
+
+ if (readbuf)
+ {
+ errno = 0;
+ if (arch64)
+ buffer.word = rs6000_ptrace64 (PT_READ_I, pid,
+ rounded_offset, 0, NULL);
+ else
+ buffer.word = rs6000_ptrace32 (PT_READ_I, pid,
+ (int *)(uintptr_t)rounded_offset,
+ 0, NULL);
+ if (errno)
+ return 0;
+
+ /* Copy appropriate bytes out of the buffer. */
+ memcpy (readbuf, buffer.byte + (offset - rounded_offset),
+ partial_len);
+ }
+
+ return partial_len;
+ }
+
+ default:
+ return -1;
}
+}
+
+/* Wait for the child specified by PTID to do something. Return the
+ process ID of the child, or MINUS_ONE_PTID in case of error; store
+ the status in *OURSTATUS. */
+
+static ptid_t
+rs6000_wait (ptid_t ptid, struct target_waitstatus *ourstatus)
+{
+ pid_t pid;
+ int status, save_errno;
- else if (regno <= LAST_UISA_SP_REGNUM) /* a special register */
+ do
{
- ptrace (PT_WRITE_GPR, inferior_pid,
- (PTRACE_ARG3_TYPE) special_regs [regno-FIRST_UISA_SP_REGNUM],
- *(int*)®isters[REGISTER_BYTE (regno)], 0);
+ set_sigint_trap ();
+ set_sigio_trap ();
+
+ do
+ {
+ pid = waitpid (ptid_get_pid (ptid), &status, 0);
+ save_errno = errno;
+ }
+ while (pid == -1 && errno == EINTR);
+
+ clear_sigio_trap ();
+ clear_sigint_trap ();
+
+ if (pid == -1)
+ {
+ fprintf_unfiltered (gdb_stderr,
+ _("Child process unexpectedly missing: %s.\n"),
+ safe_strerror (save_errno));
+
+ /* Claim it exited with unknown signal. */
+ ourstatus->kind = TARGET_WAITKIND_SIGNALLED;
+ ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
+ return minus_one_ptid;
+ }
+
+ /* Ignore terminated detached child processes. */
+ if (!WIFSTOPPED (status) && pid != ptid_get_pid (inferior_ptid))
+ pid = -1;
}
+ while (pid == -1);
+
+ /* AIX has a couple of strange returns from wait(). */
+ /* stop after load" status. */
+ if (status == 0x57c)
+ ourstatus->kind = TARGET_WAITKIND_LOADED;
+ /* signal 0. I have no idea why wait(2) returns with this status word. */
+ else if (status == 0x7f)
+ ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
+ /* A normal waitstatus. Let the usual macros deal with it. */
else
- fprintf_unfiltered (gdb_stderr,
- "Gdb error: register no %d not implemented.\n",
- regno);
+ store_waitstatus (ourstatus, status);
- if (errno)
- {
- perror ("ptrace write");
- errno = 0;
- }
+ return pid_to_ptid (pid);
}
/* Execute one dummy breakpoint instruction. This way we give the kernel
including u_area. */
static void
-exec_one_dummy_insn ()
+exec_one_dummy_insn (struct gdbarch *gdbarch)
{
-#define DUMMY_INSN_ADDR (TEXT_SEGMENT_BASE)+0x200
+#define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200
- char shadow_contents[BREAKPOINT_MAX]; /* Stash old bkpt addr contents */
- int status, pid;
+ int ret, status, pid;
CORE_ADDR prev_pc;
+ void *bp;
/* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
assume that this address will never be executed again by the real
code. */
- target_insert_breakpoint (DUMMY_INSN_ADDR, shadow_contents);
-
- errno = 0;
+ bp = deprecated_insert_raw_breakpoint (DUMMY_INSN_ADDR);
/* You might think this could be done with a single ptrace call, and
you'd be correct for just about every platform I've ever worked
powerpc-ibm-aix4.1.3 works correctly). */
prev_pc = read_pc ();
write_pc (DUMMY_INSN_ADDR);
- ptrace (PT_CONTINUE, inferior_pid, (PTRACE_ARG3_TYPE)1, 0, 0);
+ if (ARCH64 ())
+ ret = rs6000_ptrace64 (PT_CONTINUE, PIDGET (inferior_ptid), 1, 0, NULL);
+ else
+ ret = rs6000_ptrace32 (PT_CONTINUE, PIDGET (inferior_ptid), (int *)1, 0, NULL);
- if (errno)
+ if (ret != 0)
perror ("pt_continue");
- do {
- pid = wait (&status);
- } while (pid != inferior_pid);
-
+ do
+ {
+ pid = wait (&status);
+ }
+ while (pid != PIDGET (inferior_ptid));
+
write_pc (prev_pc);
- target_remove_breakpoint (DUMMY_INSN_ADDR, shadow_contents);
+ deprecated_remove_raw_breakpoint (bp);
}
+\f
+
+/* Copy information about text and data sections from LDI to VP for a 64-bit
+ process if ARCH64 and for a 32-bit process otherwise. */
static void
-fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
- char *core_reg_sect;
- unsigned core_reg_size;
- int which;
- CORE_ADDR reg_addr; /* Unused in this version */
+vmap_secs (struct vmap *vp, LdInfo *ldi, int arch64)
{
- /* fetch GPRs and special registers from the first register section
- in core bfd. */
- if (which == 0)
+ if (arch64)
{
- /* copy GPRs first. */
- memcpy (registers, core_reg_sect, 32 * 4);
-
- /* gdb's internal register template and bfd's register section layout
- should share a common include file. FIXMEmgo */
- /* then comes special registes. They are supposed to be in the same
- order in gdb template and bfd `.reg' section. */
- core_reg_sect += (32 * 4);
- memcpy (®isters [REGISTER_BYTE (FIRST_UISA_SP_REGNUM)],
- core_reg_sect,
- (LAST_UISA_SP_REGNUM - FIRST_UISA_SP_REGNUM + 1) * 4);
+ vp->tstart = (CORE_ADDR) ldi->l64.ldinfo_textorg;
+ vp->tend = vp->tstart + ldi->l64.ldinfo_textsize;
+ vp->dstart = (CORE_ADDR) ldi->l64.ldinfo_dataorg;
+ vp->dend = vp->dstart + ldi->l64.ldinfo_datasize;
}
-
- /* fetch floating point registers from register section 2 in core bfd. */
- else if (which == 2)
- memcpy (®isters [REGISTER_BYTE (FP0_REGNUM)], core_reg_sect, 32 * 8);
-
else
- fprintf_unfiltered
- (gdb_stderr,
- "Gdb error: unknown parameter to fetch_core_registers().\n");
+ {
+ vp->tstart = (unsigned long) ldi->l32.ldinfo_textorg;
+ vp->tend = vp->tstart + ldi->l32.ldinfo_textsize;
+ vp->dstart = (unsigned long) ldi->l32.ldinfo_dataorg;
+ vp->dend = vp->dstart + ldi->l32.ldinfo_datasize;
+ }
+
+ /* The run time loader maps the file header in addition to the text
+ section and returns a pointer to the header in ldinfo_textorg.
+ Adjust the text start address to point to the real start address
+ of the text section. */
+ vp->tstart += vp->toffs;
}
-\f
+
/* handle symbol translation on vmapping */
static void
-vmap_symtab (vp)
- register struct vmap *vp;
+vmap_symtab (struct vmap *vp)
{
- register struct objfile *objfile;
+ struct objfile *objfile;
struct section_offsets *new_offsets;
int i;
-
+
objfile = vp->objfile;
if (objfile == NULL)
{
/* OK, it's not an objfile we opened ourselves.
- Currently, that can only happen with the exec file, so
- relocate the symbols for the symfile. */
+ Currently, that can only happen with the exec file, so
+ relocate the symbols for the symfile. */
if (symfile_objfile == NULL)
return;
objfile = symfile_objfile;
}
+ else if (!vp->loaded)
+ /* If symbols are not yet loaded, offsets are not yet valid. */
+ return;
- new_offsets = alloca
- (sizeof (struct section_offsets)
- + sizeof (new_offsets->offsets) * objfile->num_sections);
+ new_offsets =
+ (struct section_offsets *)
+ alloca (SIZEOF_N_SECTION_OFFSETS (objfile->num_sections));
for (i = 0; i < objfile->num_sections; ++i)
- ANOFFSET (new_offsets, i) = ANOFFSET (objfile->section_offsets, i);
-
+ new_offsets->offsets[i] = ANOFFSET (objfile->section_offsets, i);
+
/* The symbols in the object file are linked to the VMA of the section,
relocate them VMA relative. */
- ANOFFSET (new_offsets, SECT_OFF_TEXT) = vp->tstart - vp->tvma;
- ANOFFSET (new_offsets, SECT_OFF_DATA) = vp->dstart - vp->dvma;
- ANOFFSET (new_offsets, SECT_OFF_BSS) = vp->dstart - vp->dvma;
+ new_offsets->offsets[SECT_OFF_TEXT (objfile)] = vp->tstart - vp->tvma;
+ new_offsets->offsets[SECT_OFF_DATA (objfile)] = vp->dstart - vp->dvma;
+ new_offsets->offsets[SECT_OFF_BSS (objfile)] = vp->dstart - vp->dvma;
objfile_relocate (objfile, new_offsets);
}
/* Add symbols for an objfile. */
static int
-objfile_symbol_add (arg)
- char *arg;
+objfile_symbol_add (void *arg)
{
struct objfile *obj = (struct objfile *) arg;
- syms_from_objfile (obj, 0, 0, 0);
+ syms_from_objfile (obj, NULL, 0, 0, 0, 0);
new_symfile_objfile (obj, 0, 0);
return 1;
}
+/* Add symbols for a vmap. Return zero upon error. */
+
+int
+vmap_add_symbols (struct vmap *vp)
+{
+ if (catch_errors (objfile_symbol_add, vp->objfile,
+ "Error while reading shared library symbols:\n",
+ RETURN_MASK_ALL))
+ {
+ /* Note this is only done if symbol reading was successful. */
+ vp->loaded = 1;
+ vmap_symtab (vp);
+ return 1;
+ }
+ return 0;
+}
+
/* Add a new vmap entry based on ldinfo() information.
If ldi->ldinfo_fd is not valid (e.g. this struct ld_info is from a
Return the vmap new entry. */
static struct vmap *
-add_vmap (ldi)
- register struct ld_info *ldi;
+add_vmap (LdInfo *ldi)
{
bfd *abfd, *last;
- register char *mem, *objname;
+ char *mem, *objname, *filename;
struct objfile *obj;
struct vmap *vp;
+ int fd;
+ ARCH64_DECL (arch64);
/* This ldi structure was allocated using alloca() in
xcoff_relocate_symtab(). Now we need to have persistent object
and member names, so we should save them. */
- mem = ldi->ldinfo_filename + strlen (ldi->ldinfo_filename) + 1;
+ filename = LDI_FILENAME (ldi, arch64);
+ mem = filename + strlen (filename) + 1;
mem = savestring (mem, strlen (mem));
- objname = savestring (ldi->ldinfo_filename, strlen (ldi->ldinfo_filename));
+ objname = savestring (filename, strlen (filename));
- if (ldi->ldinfo_fd < 0)
+ fd = LDI_FD (ldi, arch64);
+ if (fd < 0)
/* Note that this opens it once for every member; a possible
enhancement would be to only open it once for every object. */
abfd = bfd_openr (objname, gnutarget);
else
- abfd = bfd_fdopenr (objname, gnutarget, ldi->ldinfo_fd);
+ abfd = bfd_fdopenr (objname, gnutarget, fd);
if (!abfd)
- error ("Could not open `%s' as an executable file: %s",
- objname, bfd_errmsg (bfd_get_error ()));
+ {
+ warning (_("Could not open `%s' as an executable file: %s"),
+ objname, bfd_errmsg (bfd_get_error ()));
+ return NULL;
+ }
/* make sure we have an object file */
last = 0;
/* FIXME??? am I tossing BFDs? bfd? */
while ((last = bfd_openr_next_archived_file (abfd, last)))
- if (STREQ (mem, last->filename))
+ if (strcmp (mem, last->filename) == 0)
break;
if (!last)
{
+ warning (_("\"%s\": member \"%s\" missing."), objname, mem);
bfd_close (abfd);
- /* FIXME -- should be error */
- warning ("\"%s\": member \"%s\" missing.", abfd->filename, mem);
- return 0;
+ return NULL;
}
- if (!bfd_check_format(last, bfd_object))
+ if (!bfd_check_format (last, bfd_object))
{
- bfd_close (last); /* XXX??? */
- goto obj_err;
+ warning (_("\"%s\": member \"%s\" not in executable format: %s."),
+ objname, mem, bfd_errmsg (bfd_get_error ()));
+ bfd_close (last);
+ bfd_close (abfd);
+ return NULL;
}
vp = map_vmap (last, abfd);
}
else
{
- obj_err:
+ warning (_("\"%s\": not in executable format: %s."),
+ objname, bfd_errmsg (bfd_get_error ()));
bfd_close (abfd);
- error ("\"%s\": not in executable format: %s.",
- objname, bfd_errmsg (bfd_get_error ()));
- /*NOTREACHED*/
+ return NULL;
}
- obj = allocate_objfile (vp->bfd, 0, 0, 0);
+ obj = allocate_objfile (vp->bfd, 0);
vp->objfile = obj;
-#ifndef SOLIB_SYMBOLS_MANUAL
- if (catch_errors (objfile_symbol_add, (char *)obj,
- "Error while reading shared library symbols:\n",
- RETURN_MASK_ALL))
- {
- /* Note this is only done if symbol reading was successful. */
- vmap_symtab (vp);
- vp->loaded = 1;
- }
-#endif
+ /* Always add symbols for the main objfile. */
+ if (vp == vmap || auto_solib_add)
+ vmap_add_symbols (vp);
return vp;
}
\f
Input is ptr to ldinfo() results. */
static void
-vmap_ldinfo (ldi)
- register struct ld_info *ldi;
+vmap_ldinfo (LdInfo *ldi)
{
struct stat ii, vi;
- register struct vmap *vp;
+ struct vmap *vp;
int got_one, retried;
int got_exec_file = 0;
+ uint next;
+ int arch64 = ARCH64 ();
/* For each *ldi, see if we have a corresponding *vp.
If so, update the mapping, and symbol table.
If not, add an entry and symbol table. */
- do {
- char *name = ldi->ldinfo_filename;
- char *memb = name + strlen(name) + 1;
-
- retried = 0;
+ do
+ {
+ char *name = LDI_FILENAME (ldi, arch64);
+ char *memb = name + strlen (name) + 1;
+ int fd = LDI_FD (ldi, arch64);
- if (fstat (ldi->ldinfo_fd, &ii) < 0)
- {
- /* The kernel sets ld_info to -1, if the process is still using the
- object, and the object is removed. Keep the symbol info for the
- removed object and issue a warning. */
- warning ("%s (fd=%d) has disappeared, keeping its symbols",
- name, ldi->ldinfo_fd);
- continue;
- }
- retry:
- for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
- {
- struct objfile *objfile;
+ retried = 0;
- /* First try to find a `vp', which is the same as in ldinfo.
- If not the same, just continue and grep the next `vp'. If same,
- relocate its tstart, tend, dstart, dend values. If no such `vp'
- found, get out of this for loop, add this ldi entry as a new vmap
- (add_vmap) and come back, find its `vp' and so on... */
+ if (fstat (fd, &ii) < 0)
+ {
+ /* The kernel sets ld_info to -1, if the process is still using the
+ object, and the object is removed. Keep the symbol info for the
+ removed object and issue a warning. */
+ warning (_("%s (fd=%d) has disappeared, keeping its symbols"),
+ name, fd);
+ continue;
+ }
+ retry:
+ for (got_one = 0, vp = vmap; vp; vp = vp->nxt)
+ {
+ struct objfile *objfile;
- /* The filenames are not always sufficient to match on. */
+ /* First try to find a `vp', which is the same as in ldinfo.
+ If not the same, just continue and grep the next `vp'. If same,
+ relocate its tstart, tend, dstart, dend values. If no such `vp'
+ found, get out of this for loop, add this ldi entry as a new vmap
+ (add_vmap) and come back, find its `vp' and so on... */
- if ((name[0] == '/' && !STREQ(name, vp->name))
- || (memb[0] && !STREQ(memb, vp->member)))
- continue;
+ /* The filenames are not always sufficient to match on. */
- /* See if we are referring to the same file.
- We have to check objfile->obfd, symfile.c:reread_symbols might
- have updated the obfd after a change. */
- objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
- if (objfile == NULL
- || objfile->obfd == NULL
- || bfd_stat (objfile->obfd, &vi) < 0)
- {
- warning ("Unable to stat %s, keeping its symbols", name);
+ if ((name[0] == '/' && strcmp (name, vp->name) != 0)
+ || (memb[0] && strcmp (memb, vp->member) != 0))
continue;
- }
- if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
- continue;
+ /* See if we are referring to the same file.
+ We have to check objfile->obfd, symfile.c:reread_symbols might
+ have updated the obfd after a change. */
+ objfile = vp->objfile == NULL ? symfile_objfile : vp->objfile;
+ if (objfile == NULL
+ || objfile->obfd == NULL
+ || bfd_stat (objfile->obfd, &vi) < 0)
+ {
+ warning (_("Unable to stat %s, keeping its symbols"), name);
+ continue;
+ }
- if (!retried)
- close (ldi->ldinfo_fd);
+ if (ii.st_dev != vi.st_dev || ii.st_ino != vi.st_ino)
+ continue;
- ++got_one;
+ if (!retried)
+ close (fd);
- /* Found a corresponding VMAP. Remap! */
+ ++got_one;
- /* We can assume pointer == CORE_ADDR, this code is native only. */
- vp->tstart = (CORE_ADDR) ldi->ldinfo_textorg;
- vp->tend = vp->tstart + ldi->ldinfo_textsize;
- vp->dstart = (CORE_ADDR) ldi->ldinfo_dataorg;
- vp->dend = vp->dstart + ldi->ldinfo_datasize;
+ /* Found a corresponding VMAP. Remap! */
- /* The run time loader maps the file header in addition to the text
- section and returns a pointer to the header in ldinfo_textorg.
- Adjust the text start address to point to the real start address
- of the text section. */
- vp->tstart += vp->toffs;
+ vmap_secs (vp, ldi, arch64);
- /* The objfile is only NULL for the exec file. */
- if (vp->objfile == NULL)
- got_exec_file = 1;
+ /* The objfile is only NULL for the exec file. */
+ if (vp->objfile == NULL)
+ got_exec_file = 1;
- /* relocate symbol table(s). */
- vmap_symtab (vp);
+ /* relocate symbol table(s). */
+ vmap_symtab (vp);
- /* There may be more, so we don't break out of the loop. */
- }
+ /* Announce new object files. Doing this after symbol relocation
+ makes aix-thread.c's job easier. */
+ if (vp->objfile)
+ observer_notify_new_objfile (vp->objfile);
- /* if there was no matching *vp, we must perforce create the sucker(s) */
- if (!got_one && !retried)
- {
- add_vmap (ldi);
- ++retried;
- goto retry;
- }
- } while (ldi->ldinfo_next
- && (ldi = (void *) (ldi->ldinfo_next + (char *) ldi)));
+ /* There may be more, so we don't break out of the loop. */
+ }
+
+ /* if there was no matching *vp, we must perforce create the sucker(s) */
+ if (!got_one && !retried)
+ {
+ add_vmap (ldi);
+ ++retried;
+ goto retry;
+ }
+ }
+ while ((next = LDI_NEXT (ldi, arch64))
+ && (ldi = (void *) (next + (char *) ldi)));
/* If we don't find the symfile_objfile anywhere in the ldinfo, it
is unlikely that the symbol file is relocated to the proper
running a different copy of the same executable. */
if (symfile_objfile != NULL && !got_exec_file)
{
- warning_begin ();
- fputs_unfiltered ("Symbol file ", gdb_stderr);
- fputs_unfiltered (symfile_objfile->name, gdb_stderr);
- fputs_unfiltered ("\nis not mapped; discarding it.\n\
+ warning (_("Symbol file %s\nis not mapped; discarding it.\n\
If in fact that file has symbols which the mapped files listed by\n\
\"info files\" lack, you can load symbols with the \"symbol-file\" or\n\
\"add-symbol-file\" commands (note that you must take care of relocating\n\
-symbols to the proper address).\n", gdb_stderr);
+symbols to the proper address)."),
+ symfile_objfile->name);
free_objfile (symfile_objfile);
symfile_objfile = NULL;
}
`exec_sections' need to be relocated only once, as long as the exec
file remains unchanged.
-*/
+ */
static void
-vmap_exec ()
+vmap_exec (void)
{
static bfd *execbfd;
int i;
execbfd = exec_bfd;
if (!vmap || !exec_ops.to_sections)
- error ("vmap_exec: vmap or exec_ops.to_sections == 0\n");
+ error (_("vmap_exec: vmap or exec_ops.to_sections == 0."));
- for (i=0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
+ for (i = 0; &exec_ops.to_sections[i] < exec_ops.to_sections_end; i++)
{
- if (STREQ(".text", exec_ops.to_sections[i].the_bfd_section->name))
+ if (strcmp (".text", exec_ops.to_sections[i].the_bfd_section->name) == 0)
{
exec_ops.to_sections[i].addr += vmap->tstart - vmap->tvma;
exec_ops.to_sections[i].endaddr += vmap->tstart - vmap->tvma;
}
- else if (STREQ(".data", exec_ops.to_sections[i].the_bfd_section->name))
+ else if (strcmp (".data",
+ exec_ops.to_sections[i].the_bfd_section->name) == 0)
{
exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
}
- else if (STREQ(".bss", exec_ops.to_sections[i].the_bfd_section->name))
+ else if (strcmp (".bss",
+ exec_ops.to_sections[i].the_bfd_section->name) == 0)
{
exec_ops.to_sections[i].addr += vmap->dstart - vmap->dvma;
exec_ops.to_sections[i].endaddr += vmap->dstart - vmap->dvma;
}
}
}
-\f
-/* xcoff_relocate_symtab - hook for symbol table relocation.
- also reads shared libraries.. */
-void
-xcoff_relocate_symtab (pid)
- unsigned int pid;
+/* Set the current architecture from the host running GDB. Called when
+ starting a child process. */
+
+static void (*super_create_inferior) (char *exec_file, char *allargs,
+ char **env, int from_tty);
+static void
+rs6000_create_inferior (char *exec_file, char *allargs, char **env, int from_tty)
{
-#define MAX_LOAD_SEGS 64 /* maximum number of load segments */
+ enum bfd_architecture arch;
+ unsigned long mach;
+ bfd abfd;
+ struct gdbarch_info info;
- struct ld_info *ldi;
+ super_create_inferior (exec_file, allargs, env, from_tty);
- ldi = (void *) alloca(MAX_LOAD_SEGS * sizeof (*ldi));
+ if (__power_rs ())
+ {
+ arch = bfd_arch_rs6000;
+ mach = bfd_mach_rs6k;
+ }
+ else
+ {
+ arch = bfd_arch_powerpc;
+ mach = bfd_mach_ppc;
+ }
- /* According to my humble theory, AIX has some timing problems and
- when the user stack grows, kernel doesn't update stack info in time
- and ptrace calls step on user stack. That is why we sleep here a little,
- and give kernel to update its internals. */
+ /* FIXME: schauer/2002-02-25:
+ We don't know if we are executing a 32 or 64 bit executable,
+ and have no way to pass the proper word size to rs6000_gdbarch_init.
+ So we have to avoid switching to a new architecture, if the architecture
+ matches already.
+ Blindly calling rs6000_gdbarch_init used to work in older versions of
+ GDB, as rs6000_gdbarch_init incorrectly used the previous tdep to
+ determine the wordsize. */
+ if (exec_bfd)
+ {
+ const struct bfd_arch_info *exec_bfd_arch_info;
- usleep (36000);
+ exec_bfd_arch_info = bfd_get_arch_info (exec_bfd);
+ if (arch == exec_bfd_arch_info->arch)
+ return;
+ }
- errno = 0;
- ptrace (PT_LDINFO, pid, (PTRACE_ARG3_TYPE) ldi,
- MAX_LOAD_SEGS * sizeof(*ldi), (int *) ldi);
- if (errno)
- perror_with_name ("ptrace ldinfo");
+ bfd_default_set_arch_mach (&abfd, arch, mach);
- vmap_ldinfo (ldi);
+ gdbarch_info_init (&info);
+ info.bfd_arch_info = bfd_get_arch_info (&abfd);
+ info.abfd = exec_bfd;
- /* relocate the exec and core sections as well. */
- vmap_exec ();
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("rs6000_create_inferior: failed to select architecture"));
+}
+
+\f
+/* xcoff_relocate_symtab - hook for symbol table relocation.
+
+ This is only applicable to live processes, and is a no-op when
+ debugging a core file. */
+
+void
+xcoff_relocate_symtab (unsigned int pid)
+{
+ int load_segs = 64; /* number of load segments */
+ int rc;
+ LdInfo *ldi = NULL;
+ int arch64 = ARCH64 ();
+ int ldisize = arch64 ? sizeof (ldi->l64) : sizeof (ldi->l32);
+ int size;
+
+ if (ptid_equal (inferior_ptid, null_ptid))
+ return;
+
+ do
+ {
+ size = load_segs * ldisize;
+ ldi = (void *) xrealloc (ldi, size);
+
+#if 0
+ /* According to my humble theory, AIX has some timing problems and
+ when the user stack grows, kernel doesn't update stack info in time
+ and ptrace calls step on user stack. That is why we sleep here a
+ little, and give kernel to update its internals. */
+ usleep (36000);
+#endif
+
+ if (arch64)
+ rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi, size, NULL);
+ else
+ rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi, size, NULL);
+
+ if (rc == -1)
+ {
+ if (errno == ENOMEM)
+ load_segs *= 2;
+ else
+ perror_with_name (_("ptrace ldinfo"));
+ }
+ else
+ {
+ vmap_ldinfo (ldi);
+ vmap_exec (); /* relocate the exec and core sections as well. */
+ }
+ } while (rc == -1);
+ if (ldi)
+ xfree (ldi);
}
\f
/* Core file stuff. */
from the core file. */
void
-xcoff_relocate_core (target)
- struct target_ops *target;
+xcoff_relocate_core (struct target_ops *target)
{
-/* Offset of member MEMBER in a struct of type TYPE. */
-#ifndef offsetof
-#define offsetof(TYPE, MEMBER) ((int) &((TYPE *)0)->MEMBER)
-#endif
-
-/* Size of a struct ld_info except for the variable-length filename. */
-#define LDINFO_SIZE (offsetof (struct ld_info, ldinfo_filename))
-
- sec_ptr ldinfo_sec;
+ struct bfd_section *ldinfo_sec;
int offset = 0;
- struct ld_info *ldip;
+ LdInfo *ldi;
struct vmap *vp;
+ int arch64 = ARCH64 ();
+
+ /* Size of a struct ld_info except for the variable-length filename. */
+ int nonfilesz = (int)LDI_FILENAME ((LdInfo *)0, arch64);
/* Allocated size of buffer. */
- int buffer_size = LDINFO_SIZE;
+ int buffer_size = nonfilesz;
char *buffer = xmalloc (buffer_size);
struct cleanup *old = make_cleanup (free_current_contents, &buffer);
-
- /* FIXME, this restriction should not exist. For now, though I'll
- avoid coredumps with error() pending a real fix. */
- if (vmap == NULL)
- error
- ("Can't debug a core file without an executable file (on the RS/6000)");
-
+
ldinfo_sec = bfd_get_section_by_name (core_bfd, ".ldinfo");
if (ldinfo_sec == NULL)
{
/* Read in everything but the name. */
if (bfd_get_section_contents (core_bfd, ldinfo_sec, buffer,
- offset, LDINFO_SIZE) == 0)
+ offset, nonfilesz) == 0)
goto bfd_err;
/* Now the name. */
- i = LDINFO_SIZE;
+ i = nonfilesz;
do
{
if (i == buffer_size)
goto bfd_err;
if (buffer[i++] == '\0')
++names_found;
- } while (names_found < 2);
+ }
+ while (names_found < 2);
- ldip = (struct ld_info *) buffer;
+ ldi = (LdInfo *) buffer;
/* Can't use a file descriptor from the core file; need to open it. */
- ldip->ldinfo_fd = -1;
-
+ if (arch64)
+ ldi->l64.ldinfo_fd = -1;
+ else
+ ldi->l32.ldinfo_fd = -1;
+
/* The first ldinfo is for the exec file, allocated elsewhere. */
- if (offset == 0)
+ if (offset == 0 && vmap != NULL)
vp = vmap;
else
- vp = add_vmap (ldip);
+ vp = add_vmap (ldi);
- offset += ldip->ldinfo_next;
+ /* Process next shared library upon error. */
+ offset += LDI_NEXT (ldi, arch64);
+ if (vp == NULL)
+ continue;
- /* We can assume pointer == CORE_ADDR, this code is native only. */
- vp->tstart = (CORE_ADDR) ldip->ldinfo_textorg;
- vp->tend = vp->tstart + ldip->ldinfo_textsize;
- vp->dstart = (CORE_ADDR) ldip->ldinfo_dataorg;
- vp->dend = vp->dstart + ldip->ldinfo_datasize;
-
- /* The run time loader maps the file header in addition to the text
- section and returns a pointer to the header in ldinfo_textorg.
- Adjust the text start address to point to the real start address
- of the text section. */
- vp->tstart += vp->toffs;
+ vmap_secs (vp, ldi, arch64);
/* Unless this is the exec file,
- add our sections to the section table for the core target. */
+ add our sections to the section table for the core target. */
if (vp != vmap)
{
- int count;
struct section_table *stp;
- int update_coreops;
-
- /* We must update the to_sections field in the core_ops structure
- now to avoid dangling pointer dereferences. */
- update_coreops = core_ops.to_sections == target->to_sections;
-
- count = target->to_sections_end - target->to_sections;
- count += 2;
- target->to_sections = (struct section_table *)
- xrealloc (target->to_sections,
- sizeof (struct section_table) * count);
- target->to_sections_end = target->to_sections + count;
-
- /* Update the to_sections field in the core_ops structure
- if needed. */
- if (update_coreops)
- {
- core_ops.to_sections = target->to_sections;
- core_ops.to_sections_end = target->to_sections_end;
- }
+
+ target_resize_to_sections (target, 2);
stp = target->to_sections_end - 2;
stp->bfd = vp->bfd;
stp->addr = vp->tstart;
stp->endaddr = vp->tend;
stp++;
-
+
stp->bfd = vp->bfd;
stp->the_bfd_section = bfd_get_section_by_name (stp->bfd, ".data");
stp->addr = vp->dstart;
}
vmap_symtab (vp);
- } while (ldip->ldinfo_next != 0);
+
+ if (vp != vmap && vp->objfile)
+ observer_notify_new_objfile (vp->objfile);
+ }
+ while (LDI_NEXT (ldi, arch64) != 0);
vmap_exec ();
breakpoint_re_set ();
do_cleanups (old);
}
-
-int
-kernel_u_size ()
-{
- return (sizeof (struct user));
-}
\f
/* Under AIX, we have to pass the correct TOC pointer to a function
when calling functions in the inferior.
and add the current load address of the data segment from the vmap. */
static CORE_ADDR
-find_toc_address (pc)
- CORE_ADDR pc;
+find_toc_address (CORE_ADDR pc)
{
struct vmap *vp;
+ extern CORE_ADDR get_toc_offset (struct objfile *); /* xcoffread.c */
for (vp = vmap; vp; vp = vp->nxt)
{
: vp->objfile);
}
}
- error ("Unable to find TOC entry for pc 0x%x\n", pc);
+ error (_("Unable to find TOC entry for pc %s."), hex_string (pc));
}
\f
-/* Register that we are able to handle rs6000 core file formats. */
-
-static struct core_fns rs6000_core_fns =
-{
- bfd_target_coff_flavour,
- fetch_core_registers,
- NULL
-};
void
-_initialize_core_rs6000 ()
+_initialize_rs6000_nat (void)
{
- /* Initialize hook in rs6000-tdep.c for determining the TOC address when
- calling functions in the inferior. */
- find_toc_address_hook = &find_toc_address;
-
- /* For native configurations, where this module is included, inform
- the xcoffsolib module where it can find the function for symbol table
- relocation at runtime. */
- xcoff_relocate_symtab_hook = &xcoff_relocate_symtab;
- add_core_fns (&rs6000_core_fns);
+ struct target_ops *t;
+
+ t = inf_ptrace_target ();
+ t->to_fetch_registers = rs6000_fetch_inferior_registers;
+ t->to_store_registers = rs6000_store_inferior_registers;
+ t->to_xfer_partial = rs6000_xfer_partial;
+
+ super_create_inferior = t->to_create_inferior;
+ t->to_create_inferior = rs6000_create_inferior;
+
+ t->to_wait = rs6000_wait;
+
+ add_target (t);
+
+ /* Initialize hook in rs6000-tdep.c for determining the TOC address
+ when calling functions in the inferior. */
+ rs6000_find_toc_address_hook = find_toc_address;
}