old-cross-binutils/gdb/auxv.c

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/* Auxiliary vector support for GDB, the GNU debugger.
Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(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, write to the Free Software
* breakpoint.c: * arm-tdep.c: * ia64-tdep.c: * i386-tdep.c: * hpread.c: * hppa-tdep.c: * hppa-hpux-tdep.c: * gnu-nat.c: * gdbtypes.c: * gdbarch.h: * gdbarch.c: * eval.c: * dwarf2read.c: * dbxread.c: * copying: * symfile.c: * stabsread.c: * sh64-tdep.c: * sh-tdep.c: * s390-tdep.c: * rs6000-tdep.c: * remote.c: * remote-mips.c: * mips-tdep.c: * mdebugread.c: * linux-nat.c: * infrun.c: * xcoffread.c: * win32-nat.c: * valops.c: * utils.c: * tracepoint.c: * target.c: * symtab.c: * c-exp.y: * ada-valprint.c: * ada-typeprint.c: * ada-lex.l: * ada-lang.h: * ada-lang.c: * ada-exp.y: * alphafbsd-tdep.c: * alphabsd-tdep.h: * alphabsd-tdep.c: * alphabsd-nat.c: * alpha-tdep.h: * alpha-tdep.c: * alpha-osf1-tdep.c: * alpha-nat.c: * alpha-mdebug-tdep.c: * alpha-linux-tdep.c: * alpha-linux-nat.c: * aix-thread.c: * abug-rom.c: * arch-utils.c: * annotate.h: * annotate.c: * amd64obsd-tdep.c: * amd64obsd-nat.c: * amd64nbsd-tdep.c: * amd64nbsd-nat.c: * amd64fbsd-tdep.c: * amd64fbsd-nat.c: * amd64bsd-nat.c: * amd64-tdep.h: * amd64-tdep.c: * amd64-sol2-tdep.c: * amd64-nat.h: * amd64-nat.c: * amd64-linux-tdep.c: * amd64-linux-nat.c: * alphanbsd-tdep.c: * block.h: * block.c: * bfd-target.h: * bfd-target.c: * bcache.h: * bcache.c: * ax.h: * ax-general.c: * ax-gdb.h: * ax-gdb.c: * avr-tdep.c: * auxv.h: * auxv.c: * armnbsd-tdep.c: * armnbsd-nat.c: * arm-tdep.h: * arm-linux-nat.c: * arch-utils.h: * charset.c: * call-cmds.h: * c-valprint.c: * c-typeprint.c: * c-lang.h: * c-lang.c: * buildsym.h: * buildsym.c: * bsd-uthread.h: * bsd-uthread.c: * bsd-kvm.h: * bsd-kvm.c: * breakpoint.h: * core-regset.c: * core-aout.c: * completer.h: * completer.c: * complaints.h: * complaints.c: * command.h: * coffread.c: * coff-solib.h: * coff-solib.c: * coff-pe-read.h: * coff-pe-read.c: * cli-out.h: * cli-out.c: * charset.h: * dink32-rom.c: * dictionary.h: * dictionary.c: * demangle.c: * defs.h: * dcache.h: * dcache.c: * d10v-tdep.c: * cpu32bug-rom.c: * cp-valprint.c: * cp-support.h: * cp-support.c: * cp-namespace.c: * cp-abi.h: * cp-abi.c: * corelow.c: * corefile.c: * environ.c: * elfread.c: * dwarfread.c: * dwarf2loc.c: * dwarf2expr.h: * dwarf2expr.c: * dwarf2-frame.h: * dwarf2-frame.c: * dve3900-rom.c: * dummy-frame.h: * dummy-frame.c: * dsrec.c: * doublest.h: * doublest.c: * disasm.h: * disasm.c: * fork-child.c: * findvar.c: * fbsd-nat.h: * fbsd-nat.c: * f-valprint.c: * f-typeprint.c: * f-lang.h: * f-lang.c: * expression.h: * expprint.c: * exec.h: * exec.c: * exceptions.h: * exceptions.c: * event-top.h: * event-top.c: * event-loop.h: * event-loop.c: * gdb.c: * gdb-stabs.h: * gdb-events.h: * gdb-events.c: * gcore.c: * frv-tdep.h: * frv-tdep.c: * frv-linux-tdep.c: * frame.h: * frame.c: * frame-unwind.h: * frame-unwind.c: * frame-base.h: * frame-base.c: * gdb_vfork.h: * gdb_thread_db.h: * gdb_string.h: * gdb_stat.h: * gdb_regex.h: * gdb_ptrace.h: * gdb_proc_service.h: * gdb_obstack.h: * gdb_locale.h: * gdb_dirent.h: * gdb_curses.h: * gdb_assert.h: * gdbarch.sh: * gdb.h: * hpux-thread.c: * hppabsd-nat.c: * hppa-tdep.h: * hpacc-abi.c: * h8300-tdep.c: * gregset.h: * go32-nat.c: * gnu-v3-abi.c: * gnu-v2-abi.h: * gnu-v2-abi.c: * gnu-nat.h: * glibc-tdep.c: * gdbtypes.h: * gdbcore.h: * gdbcmd.h: * i386nbsd-tdep.c: * i386nbsd-nat.c: * i386gnu-tdep.c: * i386gnu-nat.c: * i386fbsd-tdep.c: * i386fbsd-nat.c: * i386bsd-tdep.c: * i386bsd-nat.h: * i386bsd-nat.c: * i386-tdep.h: * i386-sol2-nat.c: * i386-nto-tdep.c: * i386-nat.c: * i386-linux-tdep.h: * i386-linux-tdep.c: * i386-linux-nat.c: * i386-cygwin-tdep.c: * inf-ttrace.c: * inf-ptrace.h: * inf-ptrace.c: * inf-loop.h: * inf-loop.c: * inf-child.h: * inf-child.c: * ia64-tdep.h: * ia64-linux-nat.c: * i387-tdep.h: * i387-tdep.c: * i386v4-nat.c: * i386v-nat.c: * i386obsd-tdep.c: * i386obsd-nat.c: * kod.c: * jv-valprint.c: * jv-typeprint.c: * jv-lang.h: * jv-lang.c: * irix5-nat.c: * iq2000-tdep.c: * interps.h: * interps.c: * inftarg.c: * inflow.h: * inflow.c: * inferior.h: * infcmd.c: * infcall.h: * infcall.c: * inf-ttrace.h: * m32r-tdep.h: * m32r-tdep.c: * m32r-rom.c: * m32r-linux-tdep.c: * m32r-linux-nat.c: * m2-valprint.c: * m2-typeprint.c: * m2-lang.h: * m2-lang.c: * lynx-nat.c: * linux-thread-db.c: * linux-nat.h: * linespec.c: * libunwind-frame.h: * libunwind-frame.c: * language.h: * language.c: * macroexp.c: * macrocmd.c: * m88kbsd-nat.c: * m88k-tdep.h: * m88k-tdep.c: * m68klinux-tdep.c: * m68klinux-nat.c: * m68kbsd-tdep.c: * m68kbsd-nat.c: * m68k-tdep.h: * m68k-tdep.c: * mips-linux-nat.c: * mips-irix-tdep.c: * minsyms.c: * memattr.h: * memattr.c: * mem-break.c: * mdebugread.h: * main.h: * main.c: * macrotab.h: * macrotab.c: * macroscope.h: * macroscope.c: * macroexp.h: * nbsd-tdep.c: * mt-tdep.c: * monitor.h: * monitor.c: * mn10300-tdep.h: * mn10300-tdep.c: * mn10300-linux-tdep.c: * mipsv4-nat.c: * mipsread.c: * mipsnbsd-tdep.h: * mipsnbsd-tdep.c: * mipsnbsd-nat.c: * mips64obsd-tdep.c: * mips64obsd-nat.c: * mips-tdep.h: * mips-mdebug-tdep.c: * mips-linux-tdep.c: * osabi.h: * osabi.c: * ocd.h: * ocd.c: * observer.c: * objfiles.h: * objfiles.c: * objc-lang.h: * objc-lang.c: * objc-exp.y: * nto-tdep.h: * nto-tdep.c: * nto-procfs.c: * nlmread.c: * nbsd-tdep.h: * ppcobsd-tdep.c: * ppcobsd-nat.c: * ppcnbsd-tdep.h: * ppcnbsd-tdep.c: * ppcnbsd-nat.c: * ppcbug-rom.c: * ppc-tdep.h: * ppc-sysv-tdep.c: * ppc-linux-tdep.c: * ppc-linux-nat.c: * ppc-bdm.c: * parser-defs.h: * parse.c: * p-valprint.c: * p-typeprint.c: * p-lang.h: * p-lang.c: * remote-fileio.h: * remote-fileio.c: * remote-est.c: * remote-e7000.c: * regset.h: * regset.c: * reggroups.h: * reggroups.c: * regcache.h: * regcache.c: * proc-why.c: * proc-service.c: * proc-events.c: * printcmd.c: * ppcobsd-tdep.h: * sentinel-frame.h: * sentinel-frame.c: * scm-valprint.c: * scm-tags.h: * scm-lang.h: * scm-lang.c: * scm-exp.c: * s390-tdep.h: * rom68k-rom.c: * remote.h: * remote-utils.c: * remote-st.c: * remote-sim.c: * remote-sds.c: * remote-rdp.c: * remote-rdi.c: * remote-hms.c: * sim-regno.h: * shnbsd-tdep.h: * shnbsd-tdep.c: * shnbsd-nat.c: * sh-tdep.h: * serial.h: * serial.c: * ser-unix.h: * ser-unix.c: * ser-tcp.c: * ser-pipe.c: * ser-go32.c: * ser-e7kpc.c: * ser-base.h: * ser-base.c: * solib.c: * solib-svr4.h: * solib-svr4.c: * solib-sunos.c: * solib-som.h: * solib-som.c: * solib-pa64.h: * solib-pa64.c: * solib-osf.c: * solib-null.c: * solib-legacy.c: * solib-irix.c: * solib-frv.c: * solib-aix5.c: * sol-thread.c: * sparc64-linux-tdep.c: * sparc64-linux-nat.c: * sparc-tdep.h: * sparc-tdep.c: * sparc-sol2-tdep.c: * sparc-sol2-nat.c: * sparc-nat.h: * sparc-nat.c: * sparc-linux-tdep.c: * sparc-linux-nat.c: * source.h: * source.c: * somread.c: * solist.h: * solib.h: * std-regs.c: * stack.h: * stack.c: * stabsread.h: * sparcobsd-tdep.c: * sparcnbsd-tdep.c: * sparcnbsd-nat.c: * sparc64obsd-tdep.c: * sparc64nbsd-tdep.c: * sparc64nbsd-nat.c: * sparc64fbsd-tdep.c: * sparc64fbsd-nat.c: * sparc64-tdep.h: * sparc64-tdep.c: * sparc64-sol2-tdep.c: * sparc64-nat.c: * ui-file.c: * typeprint.h: * typeprint.c: * tramp-frame.h: * tramp-frame.c: * trad-frame.h: * trad-frame.c: * tracepoint.h: * top.c: * tobs.inc: * thread.c: * terminal.h: * target.h: * symfile.h: * stop-gdb.c: * vaxbsd-nat.c: * vax-tdep.h: * vax-tdep.c: * vax-nat.c: * varobj.h: * varobj.c: * value.h: * value.c: * valprint.h: * valprint.c: * v850-tdep.c: * uw-thread.c: * user-regs.c: * ui-out.h: * ui-out.c: * ui-file.h: * xcoffsolib.h: * xcoffsolib.c: * wrapper.c: * wince.c: * wince-stub.h: * wince-stub.c: * vaxobsd-tdep.c: * vaxnbsd-tdep.c: * gdb_gcore.sh: * copying.c: * configure.ac: * aclocal.m4: * acinclude.m4: * reply_mig_hack.awk: * observer.sh: * gdb_mbuild.sh: * arm-linux-tdep.c: * blockframe.c: * dbug-rom.c: * environ.h: * dwarf2loc.h: * gdb-events.sh: * glibc-tdep.h: * gdb_wait.h: * gdbthread.h: * i386-sol2-tdep.c: * hppabsd-tdep.c: * hppa-linux-nat.c: * hppa-hpux-nat.c: * ia64-linux-tdep.c: * infptrace.c: * linespec.h: * maint.c: * mips-mdebug-tdep.h: * remote-m32r-sdi.c: * s390-nat.c: * rs6000-nat.c: * remote-utils.h: * sh3-rom.c: * sh-linux-tdep.c: * top.h: * symtab.h: * symmisc.c: * symfile-mem.c: * srec.h: * user-regs.h: * version.h: * valarith.c: * xstormy16-tdep.c: * wrapper.h: * Makefile.in: * f-exp.y: * cris-tdep.c: * cp-name-parser.y: * procfs.c: * proc-utils.h: * proc-flags.c: * proc-api.c: * p-exp.y: * m68hc11-tdep.c: * m2-exp.y: * kod.h: * kod-cisco.c: * jv-exp.y: * hppa-linux-tdep.c: Add (c) after Copyright. Update the FSF address.
2005-12-17 22:34:03 +00:00
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "target.h"
#include "gdbtypes.h"
#include "command.h"
#include "inferior.h"
#include "valprint.h"
#include "gdb_assert.h"
#include "auxv.h"
#include "elf/common.h"
#include <unistd.h>
#include <fcntl.h>
/* This function is called like a to_xfer_partial hook,
but must be called with TARGET_OBJECT_AUXV.
It handles access via /proc/PID/auxv, which is the common method.
This function is appropriate for doing:
#define NATIVE_XFER_AUXV procfs_xfer_auxv
for a native target that uses inftarg.c's child_xfer_partial hook. */
LONGEST
procfs_xfer_auxv (struct target_ops *ops,
int /* enum target_object */ object,
const char *annex,
gdb_byte *readbuf,
const gdb_byte *writebuf,
ULONGEST offset,
LONGEST len)
{
char *pathname;
int fd;
LONGEST n;
gdb_assert (object == TARGET_OBJECT_AUXV);
gdb_assert (readbuf || writebuf);
pathname = xstrprintf ("/proc/%d/auxv", PIDGET (inferior_ptid));
fd = open (pathname, writebuf != NULL ? O_WRONLY : O_RDONLY);
xfree (pathname);
if (fd < 0)
return -1;
if (offset != (ULONGEST) 0
&& lseek (fd, (off_t) offset, SEEK_SET) != (off_t) offset)
n = -1;
else if (readbuf != NULL)
n = read (fd, readbuf, len);
else
n = write (fd, writebuf, len);
(void) close (fd);
return n;
}
/* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
Return 0 if *READPTR is already at the end of the buffer.
Return -1 if there is insufficient buffer for a whole entry.
Return 1 if an entry was read into *TYPEP and *VALP. */
int
target_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
{
const int sizeof_auxv_field = TYPE_LENGTH (builtin_type_void_data_ptr);
gdb_byte *ptr = *readptr;
if (endptr == ptr)
return 0;
if (endptr - ptr < sizeof_auxv_field * 2)
return -1;
*typep = extract_unsigned_integer (ptr, sizeof_auxv_field);
ptr += sizeof_auxv_field;
*valp = extract_unsigned_integer (ptr, sizeof_auxv_field);
ptr += sizeof_auxv_field;
*readptr = ptr;
return 1;
}
/* Extract the auxiliary vector entry with a_type matching MATCH.
Return zero if no such entry was found, or -1 if there was
an error getting the information. On success, return 1 after
storing the entry's value field in *VALP. */
int
target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp)
{
CORE_ADDR type, val;
gdb_byte *data;
LONGEST n = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL, &data);
gdb_byte *ptr = data;
int ents = 0;
if (n <= 0)
return n;
while (1)
switch (target_auxv_parse (ops, &ptr, data + n, &type, &val))
{
case 1: /* Here's an entry, check it. */
if (type == match)
{
xfree (data);
*valp = val;
return 1;
}
break;
case 0: /* End of the vector. */
xfree (data);
return 0;
default: /* Bogosity. */
xfree (data);
return -1;
}
/*NOTREACHED*/
}
/* Print the contents of the target's AUXV on the specified file. */
int
fprint_target_auxv (struct ui_file *file, struct target_ops *ops)
{
CORE_ADDR type, val;
gdb_byte *data;
LONGEST len = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL,
&data);
gdb_byte *ptr = data;
int ents = 0;
if (len <= 0)
return len;
while (target_auxv_parse (ops, &ptr, data + len, &type, &val) > 0)
{
extern int addressprint;
const char *name = "???";
const char *description = "";
enum { dec, hex, str } flavor = hex;
switch (type)
{
#define TAG(tag, text, kind) \
case tag: name = #tag; description = text; flavor = kind; break
TAG (AT_NULL, _("End of vector"), hex);
TAG (AT_IGNORE, _("Entry should be ignored"), hex);
TAG (AT_EXECFD, _("File descriptor of program"), dec);
TAG (AT_PHDR, _("Program headers for program"), hex);
TAG (AT_PHENT, _("Size of program header entry"), dec);
TAG (AT_PHNUM, _("Number of program headers"), dec);
TAG (AT_PAGESZ, _("System page size"), dec);
TAG (AT_BASE, _("Base address of interpreter"), hex);
TAG (AT_FLAGS, _("Flags"), hex);
TAG (AT_ENTRY, _("Entry point of program"), hex);
TAG (AT_NOTELF, _("Program is not ELF"), dec);
TAG (AT_UID, _("Real user ID"), dec);
TAG (AT_EUID, _("Effective user ID"), dec);
TAG (AT_GID, _("Real group ID"), dec);
TAG (AT_EGID, _("Effective group ID"), dec);
TAG (AT_CLKTCK, _("Frequency of times()"), dec);
TAG (AT_PLATFORM, _("String identifying platform"), str);
TAG (AT_HWCAP, _("Machine-dependent CPU capability hints"), hex);
TAG (AT_FPUCW, _("Used FPU control word"), dec);
TAG (AT_DCACHEBSIZE, _("Data cache block size"), dec);
TAG (AT_ICACHEBSIZE, _("Instruction cache block size"), dec);
TAG (AT_UCACHEBSIZE, _("Unified cache block size"), dec);
TAG (AT_IGNOREPPC, _("Entry should be ignored"), dec);
TAG (AT_SYSINFO, _("Special system info/entry points"), hex);
TAG (AT_SYSINFO_EHDR, _("System-supplied DSO's ELF header"), hex);
TAG (AT_SECURE, _("Boolean, was exec setuid-like?"), dec);
TAG (AT_SUN_UID, _("Effective user ID"), dec);
TAG (AT_SUN_RUID, _("Real user ID"), dec);
TAG (AT_SUN_GID, _("Effective group ID"), dec);
TAG (AT_SUN_RGID, _("Real group ID"), dec);
TAG (AT_SUN_LDELF, _("Dynamic linker's ELF header"), hex);
TAG (AT_SUN_LDSHDR, _("Dynamic linker's section headers"), hex);
TAG (AT_SUN_LDNAME, _("String giving name of dynamic linker"), str);
TAG (AT_SUN_LPAGESZ, _("Large pagesize"), dec);
TAG (AT_SUN_PLATFORM, _("Platform name string"), str);
TAG (AT_SUN_HWCAP, _("Machine-dependent CPU capability hints"), hex);
TAG (AT_SUN_IFLUSH, _("Should flush icache?"), dec);
TAG (AT_SUN_CPU, _("CPU name string"), str);
TAG (AT_SUN_EMUL_ENTRY, _("COFF entry point address"), hex);
TAG (AT_SUN_EMUL_EXECFD, _("COFF executable file descriptor"), dec);
TAG (AT_SUN_EXECNAME,
_("Canonicalized file name given to execve"), str);
TAG (AT_SUN_MMU, _("String for name of MMU module"), str);
TAG (AT_SUN_LDDATA, _("Dynamic linker's data segment address"), hex);
}
fprintf_filtered (file, "%-4s %-20s %-30s ",
paddr_d (type), name, description);
switch (flavor)
{
case dec:
fprintf_filtered (file, "%s\n", paddr_d (val));
break;
case hex:
fprintf_filtered (file, "0x%s\n", paddr_nz (val));
break;
case str:
if (addressprint)
fprintf_filtered (file, "0x%s", paddr_nz (val));
val_print_string (val, -1, 1, file);
fprintf_filtered (file, "\n");
break;
}
++ents;
}
xfree (data);
return ents;
}
static void
info_auxv_command (char *cmd, int from_tty)
{
if (! target_has_stack)
error (_("The program has no auxiliary information now."));
else
{
int ents = fprint_target_auxv (gdb_stdout, &current_target);
if (ents < 0)
error (_("No auxiliary vector found, or failed reading it."));
else if (ents == 0)
error (_("Auxiliary vector is empty."));
}
}
extern initialize_file_ftype _initialize_auxv; /* -Wmissing-prototypes; */
void
_initialize_auxv (void)
{
add_info ("auxv", info_auxv_command,
_("Display the inferior's auxiliary vector.\n\
This is information provided by the operating system at program startup."));
}