riscv-ravenscar-thread.c \
riscv-tdep.c \
rl78-tdep.c \
+ rs6000-aix-nat.c \
rs6000-lynx178-tdep.c \
- rs6000-nat.c \
rs6000-tdep.c \
rx-tdep.c \
s390-linux-nat.c \
# Host: IBM PowerPC running AIX aix-thread.o is not
# listed in NATDEPFILES as it is pulled in by
# configure.
- NATDEPFILES="${NATDEPFILES} rs6000-nat.o"
+ NATDEPFILES="${NATDEPFILES} rs6000-aix-nat.o"
# When compiled with cc, for debugging, this argument
# should be passed. We have no idea who our current
--- /dev/null
+/* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
+
+ Copyright (C) 1986-2021 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 3 of the License, or
+ (at your option) any later version.
+
+ 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 "target.h"
+#include "gdbcore.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "bfd.h"
+#include "gdb-stabs.h"
+#include "regcache.h"
+#include "arch-utils.h"
+#include "inf-child.h"
+#include "inf-ptrace.h"
+#include "ppc-tdep.h"
+#include "rs6000-tdep.h"
+#include "rs6000-aix-tdep.h"
+#include "exec.h"
+#include "observable.h"
+#include "xcoffread.h"
+
+#include <sys/ptrace.h>
+#include <sys/reg.h>
+
+#include <sys/dir.h>
+#include <sys/user.h>
+#include <signal.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+#include <a.out.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include "gdb_bfd.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>
+
+/* 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. */
+
+/* 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. */
+
+#if defined (__ld_info32) || defined (__ld_info64)
+# define ARCH3264
+#endif
+
+/* Return whether the current architecture is 64-bit. */
+
+#ifndef ARCH3264
+# define ARCH64() 0
+#else
+# define ARCH64() (register_size (target_gdbarch (), 0) == 8)
+#endif
+
+class rs6000_nat_target final : public inf_ptrace_target
+{
+public:
+ void fetch_registers (struct regcache *, int) override;
+ void store_registers (struct regcache *, int) override;
+
+ enum target_xfer_status xfer_partial (enum target_object object,
+ const char *annex,
+ gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len) override;
+
+ void create_inferior (const char *, const std::string &,
+ char **, int) override;
+
+ ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
+
+private:
+ enum target_xfer_status
+ xfer_shared_libraries (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len);
+};
+
+static rs6000_nat_target the_rs6000_nat_target;
+
+/* 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)
+{
+ ppc_gdbarch_tdep *tdep = (ppc_gdbarch_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
+ return -1;
+}
+
+/* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
+
+static int
+rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
+{
+#ifdef HAVE_PTRACE64
+ int ret = ptrace64 (req, id, (uintptr_t) addr, data, buf);
+#else
+ int ret = ptrace (req, id, (int *)addr, data, buf);
+#endif
+#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;
+}
+
+/* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
+
+static int
+rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf)
+{
+#ifdef ARCH3264
+# ifdef HAVE_PTRACE64
+ int ret = ptrace64 (req, id, addr, data, (PTRACE_TYPE_ARG5) buf);
+# else
+ int ret = ptracex (req, id, addr, data, (PTRACE_TYPE_ARG5) buf);
+# endif
+#else
+ int ret = 0;
+#endif
+#if 0
+ printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n",
+ req, id, hex_string (addr), data, (unsigned int)buf, ret);
+#endif
+ return ret;
+}
+
+/* Fetch register REGNO from the inferior. */
+
+static void
+fetch_register (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ int addr[PPC_MAX_REGISTER_SIZE];
+ int nr, isfloat;
+ pid_t pid = regcache->ptid ().pid ();
+
+ /* Retrieved values may be -1, so infer errors from errno. */
+ errno = 0;
+
+ nr = regmap (gdbarch, regno, &isfloat);
+
+ /* Floating-point registers. */
+ if (isfloat)
+ rs6000_ptrace32 (PT_READ_FPR, pid, 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);
+ return;
+ }
+
+ /* Fixed-point registers. */
+ else
+ {
+ if (!ARCH64 ())
+ *addr = rs6000_ptrace32 (PT_READ_GPR, pid, (int *) nr, 0, 0);
+ else
+ {
+ /* 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, pid, nr, 0, &buf);
+ if (register_size (gdbarch, regno) == 8)
+ memcpy (addr, &buf, 8);
+ else
+ *addr = buf;
+ }
+ }
+
+ if (!errno)
+ regcache->raw_supply (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 (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ int addr[PPC_MAX_REGISTER_SIZE];
+ int nr, isfloat;
+ pid_t pid = regcache->ptid ().pid ();
+
+ /* Fetch the register's value from the register cache. */
+ regcache->raw_collect (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, pid, 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);
+ }
+
+ /* Fixed-point registers. */
+ else
+ {
+ /* 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, pid, (int *) nr, *addr, 0);
+ else
+ {
+ /* 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, pid, nr, 0, &buf);
+ }
+ }
+
+ if (errno)
+ {
+ perror (_("ptrace write"));
+ errno = 0;
+ }
+}
+
+/* Read from the inferior all registers if REGNO == -1 and just register
+ REGNO otherwise. */
+
+void
+rs6000_nat_target::fetch_registers (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ if (regno != -1)
+ fetch_register (regcache, regno);
+
+ else
+ {
+ ppc_gdbarch_tdep *tdep = (ppc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
+
+ /* Read 32 general purpose registers. */
+ for (regno = tdep->ppc_gp0_regnum;
+ regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
+ regno++)
+ {
+ 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). */
+
+void
+rs6000_nat_target::store_registers (struct regcache *regcache, int regno)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ if (regno != -1)
+ store_register (regcache, regno);
+
+ else
+ {
+ ppc_gdbarch_tdep *tdep = (ppc_gdbarch_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);
+ }
+}
+
+/* Implement the to_xfer_partial target_ops method. */
+
+enum target_xfer_status
+rs6000_nat_target::xfer_partial (enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len)
+{
+ pid_t pid = inferior_ptid.pid ();
+ int arch64 = ARCH64 ();
+
+ switch (object)
+ {
+ case TARGET_OBJECT_LIBRARIES_AIX:
+ return xfer_shared_libraries (object, annex,
+ readbuf, writebuf,
+ offset, len, xfered_len);
+ 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 TARGET_XFER_EOF;
+ }
+
+ 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 TARGET_XFER_EOF;
+
+ /* Copy appropriate bytes out of the buffer. */
+ memcpy (readbuf, buffer.byte + (offset - rounded_offset),
+ partial_len);
+ }
+
+ *xfered_len = (ULONGEST) partial_len;
+ return TARGET_XFER_OK;
+ }
+
+ default:
+ return TARGET_XFER_E_IO;
+ }
+}
+
+/* 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. */
+
+ptid_t
+rs6000_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
+ target_wait_flags options)
+{
+ pid_t pid;
+ int status, save_errno;
+
+ do
+ {
+ set_sigint_trap ();
+
+ do
+ {
+ pid = waitpid (ptid.pid (), &status, 0);
+ save_errno = errno;
+ }
+ while (pid == -1 && errno == EINTR);
+
+ 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->set_signalled (GDB_SIGNAL_UNKNOWN);
+ return inferior_ptid;
+ }
+
+ /* Ignore terminated detached child processes. */
+ if (!WIFSTOPPED (status) && pid != inferior_ptid.pid ())
+ pid = -1;
+ }
+ while (pid == -1);
+
+ /* AIX has a couple of strange returns from wait(). */
+
+ /* stop after load" status. */
+ if (status == 0x57c)
+ ourstatus->set_loaded ();
+ /* signal 0. I have no idea why wait(2) returns with this status word. */
+ else if (status == 0x7f)
+ ourstatus->set_spurious ();
+ /* A normal waitstatus. Let the usual macros deal with it. */
+ else
+ store_waitstatus (ourstatus, status);
+
+ return ptid_t (pid);
+}
+\f
+
+/* Set the current architecture from the host running GDB. Called when
+ starting a child process. */
+
+void
+rs6000_nat_target::create_inferior (const char *exec_file,
+ const std::string &allargs,
+ char **env, int from_tty)
+{
+ enum bfd_architecture arch;
+ unsigned long mach;
+ bfd abfd;
+
+ inf_ptrace_target::create_inferior (exec_file, allargs, env, from_tty);
+
+ if (__power_rs ())
+ {
+ arch = bfd_arch_rs6000;
+ mach = bfd_mach_rs6k;
+ }
+ else
+ {
+ arch = bfd_arch_powerpc;
+ mach = bfd_mach_ppc;
+ }
+
+ /* 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 (current_program_space->exec_bfd ())
+ {
+ const struct bfd_arch_info *exec_bfd_arch_info;
+
+ exec_bfd_arch_info
+ = bfd_get_arch_info (current_program_space->exec_bfd ());
+ if (arch == exec_bfd_arch_info->arch)
+ return;
+ }
+
+ bfd_default_set_arch_mach (&abfd, arch, mach);
+
+ gdbarch_info info;
+ info.bfd_arch_info = bfd_get_arch_info (&abfd);
+ info.abfd = current_program_space->exec_bfd ();
+
+ if (!gdbarch_update_p (info))
+ internal_error (__FILE__, __LINE__,
+ _("rs6000_create_inferior: failed "
+ "to select architecture"));
+}
+\f
+
+/* Shared Object support. */
+
+/* Return the LdInfo data for the given process. Raises an error
+ if the data could not be obtained. */
+
+static gdb::byte_vector
+rs6000_ptrace_ldinfo (ptid_t ptid)
+{
+ const int pid = ptid.pid ();
+ gdb::byte_vector ldi (1024);
+ int rc = -1;
+
+ while (1)
+ {
+ if (ARCH64 ())
+ rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi.data (),
+ ldi.size (), NULL);
+ else
+ rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi.data (),
+ ldi.size (), NULL);
+
+ if (rc != -1)
+ break; /* Success, we got the entire ld_info data. */
+
+ if (errno != ENOMEM)
+ perror_with_name (_("ptrace ldinfo"));
+
+ /* ldi is not big enough. Double it and try again. */
+ ldi.resize (ldi.size () * 2);
+ }
+
+ return ldi;
+}
+
+/* Implement the to_xfer_partial target_ops method for
+ TARGET_OBJECT_LIBRARIES_AIX objects. */
+
+enum target_xfer_status
+rs6000_nat_target::xfer_shared_libraries
+ (enum target_object object,
+ const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
+{
+ ULONGEST result;
+
+ /* This function assumes that it is being run with a live process.
+ Core files are handled via gdbarch. */
+ gdb_assert (target_has_execution ());
+
+ if (writebuf)
+ return TARGET_XFER_E_IO;
+
+ gdb::byte_vector ldi_buf = rs6000_ptrace_ldinfo (inferior_ptid);
+ result = rs6000_aix_ld_info_to_xml (target_gdbarch (), ldi_buf.data (),
+ readbuf, offset, len, 1);
+
+ if (result == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = result;
+ return TARGET_XFER_OK;
+ }
+}
+
+void _initialize_rs6000_nat ();
+void
+_initialize_rs6000_nat ()
+{
+ add_inf_child_target (&the_rs6000_nat_target);
+}
+++ /dev/null
-/* IBM RS/6000 native-dependent code for GDB, the GNU debugger.
-
- Copyright (C) 1986-2021 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 3 of the License, or
- (at your option) any later version.
-
- 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 "target.h"
-#include "gdbcore.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "bfd.h"
-#include "gdb-stabs.h"
-#include "regcache.h"
-#include "arch-utils.h"
-#include "inf-child.h"
-#include "inf-ptrace.h"
-#include "ppc-tdep.h"
-#include "rs6000-tdep.h"
-#include "rs6000-aix-tdep.h"
-#include "exec.h"
-#include "observable.h"
-#include "xcoffread.h"
-
-#include <sys/ptrace.h>
-#include <sys/reg.h>
-
-#include <sys/dir.h>
-#include <sys/user.h>
-#include <signal.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-#include <a.out.h>
-#include <sys/file.h>
-#include <sys/stat.h>
-#include "gdb_bfd.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>
-
-/* 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. */
-
-/* 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. */
-
-#if defined (__ld_info32) || defined (__ld_info64)
-# define ARCH3264
-#endif
-
-/* Return whether the current architecture is 64-bit. */
-
-#ifndef ARCH3264
-# define ARCH64() 0
-#else
-# define ARCH64() (register_size (target_gdbarch (), 0) == 8)
-#endif
-
-class rs6000_nat_target final : public inf_ptrace_target
-{
-public:
- void fetch_registers (struct regcache *, int) override;
- void store_registers (struct regcache *, int) override;
-
- enum target_xfer_status xfer_partial (enum target_object object,
- const char *annex,
- gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset, ULONGEST len,
- ULONGEST *xfered_len) override;
-
- void create_inferior (const char *, const std::string &,
- char **, int) override;
-
- ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
-
-private:
- enum target_xfer_status
- xfer_shared_libraries (enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset, ULONGEST len,
- ULONGEST *xfered_len);
-};
-
-static rs6000_nat_target the_rs6000_nat_target;
-
-/* 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)
-{
- ppc_gdbarch_tdep *tdep = (ppc_gdbarch_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
- return -1;
-}
-
-/* Call ptrace(REQ, ID, ADDR, DATA, BUF). */
-
-static int
-rs6000_ptrace32 (int req, int id, int *addr, int data, int *buf)
-{
-#ifdef HAVE_PTRACE64
- int ret = ptrace64 (req, id, (uintptr_t) addr, data, buf);
-#else
- int ret = ptrace (req, id, (int *)addr, data, buf);
-#endif
-#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;
-}
-
-/* Call ptracex(REQ, ID, ADDR, DATA, BUF). */
-
-static int
-rs6000_ptrace64 (int req, int id, long long addr, int data, void *buf)
-{
-#ifdef ARCH3264
-# ifdef HAVE_PTRACE64
- int ret = ptrace64 (req, id, addr, data, (PTRACE_TYPE_ARG5) buf);
-# else
- int ret = ptracex (req, id, addr, data, (PTRACE_TYPE_ARG5) buf);
-# endif
-#else
- int ret = 0;
-#endif
-#if 0
- printf ("rs6000_ptrace64 (%d, %d, %s, %08x, 0x%x) = 0x%x\n",
- req, id, hex_string (addr), data, (unsigned int)buf, ret);
-#endif
- return ret;
-}
-
-/* Fetch register REGNO from the inferior. */
-
-static void
-fetch_register (struct regcache *regcache, int regno)
-{
- struct gdbarch *gdbarch = regcache->arch ();
- int addr[PPC_MAX_REGISTER_SIZE];
- int nr, isfloat;
- pid_t pid = regcache->ptid ().pid ();
-
- /* Retrieved values may be -1, so infer errors from errno. */
- errno = 0;
-
- nr = regmap (gdbarch, regno, &isfloat);
-
- /* Floating-point registers. */
- if (isfloat)
- rs6000_ptrace32 (PT_READ_FPR, pid, 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);
- return;
- }
-
- /* Fixed-point registers. */
- else
- {
- if (!ARCH64 ())
- *addr = rs6000_ptrace32 (PT_READ_GPR, pid, (int *) nr, 0, 0);
- else
- {
- /* 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, pid, nr, 0, &buf);
- if (register_size (gdbarch, regno) == 8)
- memcpy (addr, &buf, 8);
- else
- *addr = buf;
- }
- }
-
- if (!errno)
- regcache->raw_supply (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 (struct regcache *regcache, int regno)
-{
- struct gdbarch *gdbarch = regcache->arch ();
- int addr[PPC_MAX_REGISTER_SIZE];
- int nr, isfloat;
- pid_t pid = regcache->ptid ().pid ();
-
- /* Fetch the register's value from the register cache. */
- regcache->raw_collect (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, pid, 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);
- }
-
- /* Fixed-point registers. */
- else
- {
- /* 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, pid, (int *) nr, *addr, 0);
- else
- {
- /* 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, pid, nr, 0, &buf);
- }
- }
-
- if (errno)
- {
- perror (_("ptrace write"));
- errno = 0;
- }
-}
-
-/* Read from the inferior all registers if REGNO == -1 and just register
- REGNO otherwise. */
-
-void
-rs6000_nat_target::fetch_registers (struct regcache *regcache, int regno)
-{
- struct gdbarch *gdbarch = regcache->arch ();
- if (regno != -1)
- fetch_register (regcache, regno);
-
- else
- {
- ppc_gdbarch_tdep *tdep = (ppc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
-
- /* Read 32 general purpose registers. */
- for (regno = tdep->ppc_gp0_regnum;
- regno < tdep->ppc_gp0_regnum + ppc_num_gprs;
- regno++)
- {
- 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). */
-
-void
-rs6000_nat_target::store_registers (struct regcache *regcache, int regno)
-{
- struct gdbarch *gdbarch = regcache->arch ();
- if (regno != -1)
- store_register (regcache, regno);
-
- else
- {
- ppc_gdbarch_tdep *tdep = (ppc_gdbarch_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);
- }
-}
-
-/* Implement the to_xfer_partial target_ops method. */
-
-enum target_xfer_status
-rs6000_nat_target::xfer_partial (enum target_object object,
- const char *annex, gdb_byte *readbuf,
- const gdb_byte *writebuf,
- ULONGEST offset, ULONGEST len,
- ULONGEST *xfered_len)
-{
- pid_t pid = inferior_ptid.pid ();
- int arch64 = ARCH64 ();
-
- switch (object)
- {
- case TARGET_OBJECT_LIBRARIES_AIX:
- return xfer_shared_libraries (object, annex,
- readbuf, writebuf,
- offset, len, xfered_len);
- 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 TARGET_XFER_EOF;
- }
-
- 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 TARGET_XFER_EOF;
-
- /* Copy appropriate bytes out of the buffer. */
- memcpy (readbuf, buffer.byte + (offset - rounded_offset),
- partial_len);
- }
-
- *xfered_len = (ULONGEST) partial_len;
- return TARGET_XFER_OK;
- }
-
- default:
- return TARGET_XFER_E_IO;
- }
-}
-
-/* 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. */
-
-ptid_t
-rs6000_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
- target_wait_flags options)
-{
- pid_t pid;
- int status, save_errno;
-
- do
- {
- set_sigint_trap ();
-
- do
- {
- pid = waitpid (ptid.pid (), &status, 0);
- save_errno = errno;
- }
- while (pid == -1 && errno == EINTR);
-
- 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->set_signalled (GDB_SIGNAL_UNKNOWN);
- return inferior_ptid;
- }
-
- /* Ignore terminated detached child processes. */
- if (!WIFSTOPPED (status) && pid != inferior_ptid.pid ())
- pid = -1;
- }
- while (pid == -1);
-
- /* AIX has a couple of strange returns from wait(). */
-
- /* stop after load" status. */
- if (status == 0x57c)
- ourstatus->set_loaded ();
- /* signal 0. I have no idea why wait(2) returns with this status word. */
- else if (status == 0x7f)
- ourstatus->set_spurious ();
- /* A normal waitstatus. Let the usual macros deal with it. */
- else
- store_waitstatus (ourstatus, status);
-
- return ptid_t (pid);
-}
-\f
-
-/* Set the current architecture from the host running GDB. Called when
- starting a child process. */
-
-void
-rs6000_nat_target::create_inferior (const char *exec_file,
- const std::string &allargs,
- char **env, int from_tty)
-{
- enum bfd_architecture arch;
- unsigned long mach;
- bfd abfd;
-
- inf_ptrace_target::create_inferior (exec_file, allargs, env, from_tty);
-
- if (__power_rs ())
- {
- arch = bfd_arch_rs6000;
- mach = bfd_mach_rs6k;
- }
- else
- {
- arch = bfd_arch_powerpc;
- mach = bfd_mach_ppc;
- }
-
- /* 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 (current_program_space->exec_bfd ())
- {
- const struct bfd_arch_info *exec_bfd_arch_info;
-
- exec_bfd_arch_info
- = bfd_get_arch_info (current_program_space->exec_bfd ());
- if (arch == exec_bfd_arch_info->arch)
- return;
- }
-
- bfd_default_set_arch_mach (&abfd, arch, mach);
-
- gdbarch_info info;
- info.bfd_arch_info = bfd_get_arch_info (&abfd);
- info.abfd = current_program_space->exec_bfd ();
-
- if (!gdbarch_update_p (info))
- internal_error (__FILE__, __LINE__,
- _("rs6000_create_inferior: failed "
- "to select architecture"));
-}
-\f
-
-/* Shared Object support. */
-
-/* Return the LdInfo data for the given process. Raises an error
- if the data could not be obtained. */
-
-static gdb::byte_vector
-rs6000_ptrace_ldinfo (ptid_t ptid)
-{
- const int pid = ptid.pid ();
- gdb::byte_vector ldi (1024);
- int rc = -1;
-
- while (1)
- {
- if (ARCH64 ())
- rc = rs6000_ptrace64 (PT_LDINFO, pid, (unsigned long) ldi.data (),
- ldi.size (), NULL);
- else
- rc = rs6000_ptrace32 (PT_LDINFO, pid, (int *) ldi.data (),
- ldi.size (), NULL);
-
- if (rc != -1)
- break; /* Success, we got the entire ld_info data. */
-
- if (errno != ENOMEM)
- perror_with_name (_("ptrace ldinfo"));
-
- /* ldi is not big enough. Double it and try again. */
- ldi.resize (ldi.size () * 2);
- }
-
- return ldi;
-}
-
-/* Implement the to_xfer_partial target_ops method for
- TARGET_OBJECT_LIBRARIES_AIX objects. */
-
-enum target_xfer_status
-rs6000_nat_target::xfer_shared_libraries
- (enum target_object object,
- const char *annex, gdb_byte *readbuf, const gdb_byte *writebuf,
- ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
-{
- ULONGEST result;
-
- /* This function assumes that it is being run with a live process.
- Core files are handled via gdbarch. */
- gdb_assert (target_has_execution ());
-
- if (writebuf)
- return TARGET_XFER_E_IO;
-
- gdb::byte_vector ldi_buf = rs6000_ptrace_ldinfo (inferior_ptid);
- result = rs6000_aix_ld_info_to_xml (target_gdbarch (), ldi_buf.data (),
- readbuf, offset, len, 1);
-
- if (result == 0)
- return TARGET_XFER_EOF;
- else
- {
- *xfered_len = result;
- return TARGET_XFER_OK;
- }
-}
-
-void _initialize_rs6000_nat ();
-void
-_initialize_rs6000_nat ()
-{
- add_inf_child_target (&the_rs6000_nat_target);
-}
projects / binutils-gdb.git / commitdiff