0e9f083f4c
This removes gdb_string.h. This patch is purely mechanical. I
created it by running the two commands:
git rm common/gdb_string.h
perl -pi -e's/"gdb_string.h"/<string.h>/;' *.[chyl] */*.[chyl]
2013-11-18 Tom Tromey <tromey@redhat.com>
* common/gdb_string.h: Remove.
* aarch64-tdep.c: Use string.h, not gdb_string.h.
* ada-exp.y: Use string.h, not gdb_string.h.
* ada-lang.c: Use string.h, not gdb_string.h.
* ada-lex.l: Use string.h, not gdb_string.h.
* ada-typeprint.c: Use string.h, not gdb_string.h.
* ada-valprint.c: Use string.h, not gdb_string.h.
* aix-thread.c: Use string.h, not gdb_string.h.
* alpha-linux-tdep.c: Use string.h, not gdb_string.h.
* alpha-mdebug-tdep.c: Use string.h, not gdb_string.h.
* alpha-nat.c: Use string.h, not gdb_string.h.
* alpha-osf1-tdep.c: Use string.h, not gdb_string.h.
* alpha-tdep.c: Use string.h, not gdb_string.h.
* alphanbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64-dicos-tdep.c: Use string.h, not gdb_string.h.
* amd64-linux-nat.c: Use string.h, not gdb_string.h.
* amd64-linux-tdep.c: Use string.h, not gdb_string.h.
* amd64-nat.c: Use string.h, not gdb_string.h.
* amd64-sol2-tdep.c: Use string.h, not gdb_string.h.
* amd64fbsd-tdep.c: Use string.h, not gdb_string.h.
* amd64obsd-tdep.c: Use string.h, not gdb_string.h.
* arch-utils.c: Use string.h, not gdb_string.h.
* arm-linux-nat.c: Use string.h, not gdb_string.h.
* arm-linux-tdep.c: Use string.h, not gdb_string.h.
* arm-tdep.c: Use string.h, not gdb_string.h.
* arm-wince-tdep.c: Use string.h, not gdb_string.h.
* armbsd-tdep.c: Use string.h, not gdb_string.h.
* armnbsd-nat.c: Use string.h, not gdb_string.h.
* armnbsd-tdep.c: Use string.h, not gdb_string.h.
* armobsd-tdep.c: Use string.h, not gdb_string.h.
* avr-tdep.c: Use string.h, not gdb_string.h.
* ax-gdb.c: Use string.h, not gdb_string.h.
* ax-general.c: Use string.h, not gdb_string.h.
* bcache.c: Use string.h, not gdb_string.h.
* bfin-tdep.c: Use string.h, not gdb_string.h.
* breakpoint.c: Use string.h, not gdb_string.h.
* build-id.c: Use string.h, not gdb_string.h.
* buildsym.c: Use string.h, not gdb_string.h.
* c-exp.y: Use string.h, not gdb_string.h.
* c-lang.c: Use string.h, not gdb_string.h.
* c-typeprint.c: Use string.h, not gdb_string.h.
* c-valprint.c: Use string.h, not gdb_string.h.
* charset.c: Use string.h, not gdb_string.h.
* cli-out.c: Use string.h, not gdb_string.h.
* cli/cli-cmds.c: Use string.h, not gdb_string.h.
* cli/cli-decode.c: Use string.h, not gdb_string.h.
* cli/cli-dump.c: Use string.h, not gdb_string.h.
* cli/cli-interp.c: Use string.h, not gdb_string.h.
* cli/cli-logging.c: Use string.h, not gdb_string.h.
* cli/cli-script.c: Use string.h, not gdb_string.h.
* cli/cli-setshow.c: Use string.h, not gdb_string.h.
* cli/cli-utils.c: Use string.h, not gdb_string.h.
* coffread.c: Use string.h, not gdb_string.h.
* common/common-utils.c: Use string.h, not gdb_string.h.
* common/filestuff.c: Use string.h, not gdb_string.h.
* common/linux-procfs.c: Use string.h, not gdb_string.h.
* common/linux-ptrace.c: Use string.h, not gdb_string.h.
* common/signals.c: Use string.h, not gdb_string.h.
* common/vec.h: Use string.h, not gdb_string.h.
* core-regset.c: Use string.h, not gdb_string.h.
* corefile.c: Use string.h, not gdb_string.h.
* corelow.c: Use string.h, not gdb_string.h.
* cp-abi.c: Use string.h, not gdb_string.h.
* cp-support.c: Use string.h, not gdb_string.h.
* cp-valprint.c: Use string.h, not gdb_string.h.
* cris-tdep.c: Use string.h, not gdb_string.h.
* d-lang.c: Use string.h, not gdb_string.h.
* dbxread.c: Use string.h, not gdb_string.h.
* dcache.c: Use string.h, not gdb_string.h.
* demangle.c: Use string.h, not gdb_string.h.
* dicos-tdep.c: Use string.h, not gdb_string.h.
* disasm.c: Use string.h, not gdb_string.h.
* doublest.c: Use string.h, not gdb_string.h.
* dsrec.c: Use string.h, not gdb_string.h.
* dummy-frame.c: Use string.h, not gdb_string.h.
* dwarf2-frame.c: Use string.h, not gdb_string.h.
* dwarf2loc.c: Use string.h, not gdb_string.h.
* dwarf2read.c: Use string.h, not gdb_string.h.
* elfread.c: Use string.h, not gdb_string.h.
* environ.c: Use string.h, not gdb_string.h.
* eval.c: Use string.h, not gdb_string.h.
* event-loop.c: Use string.h, not gdb_string.h.
* exceptions.c: Use string.h, not gdb_string.h.
* exec.c: Use string.h, not gdb_string.h.
* expprint.c: Use string.h, not gdb_string.h.
* f-exp.y: Use string.h, not gdb_string.h.
* f-lang.c: Use string.h, not gdb_string.h.
* f-typeprint.c: Use string.h, not gdb_string.h.
* f-valprint.c: Use string.h, not gdb_string.h.
* fbsd-nat.c: Use string.h, not gdb_string.h.
* findcmd.c: Use string.h, not gdb_string.h.
* findvar.c: Use string.h, not gdb_string.h.
* fork-child.c: Use string.h, not gdb_string.h.
* frame.c: Use string.h, not gdb_string.h.
* frv-linux-tdep.c: Use string.h, not gdb_string.h.
* frv-tdep.c: Use string.h, not gdb_string.h.
* gdb.c: Use string.h, not gdb_string.h.
* gdb_bfd.c: Use string.h, not gdb_string.h.
* gdbarch.c: Use string.h, not gdb_string.h.
* gdbtypes.c: Use string.h, not gdb_string.h.
* gnu-nat.c: Use string.h, not gdb_string.h.
* gnu-v2-abi.c: Use string.h, not gdb_string.h.
* gnu-v3-abi.c: Use string.h, not gdb_string.h.
* go-exp.y: Use string.h, not gdb_string.h.
* go-lang.c: Use string.h, not gdb_string.h.
* go32-nat.c: Use string.h, not gdb_string.h.
* hppa-hpux-tdep.c: Use string.h, not gdb_string.h.
* hppa-linux-nat.c: Use string.h, not gdb_string.h.
* hppanbsd-tdep.c: Use string.h, not gdb_string.h.
* hppaobsd-tdep.c: Use string.h, not gdb_string.h.
* i386-cygwin-tdep.c: Use string.h, not gdb_string.h.
* i386-dicos-tdep.c: Use string.h, not gdb_string.h.
* i386-linux-nat.c: Use string.h, not gdb_string.h.
* i386-linux-tdep.c: Use string.h, not gdb_string.h.
* i386-nto-tdep.c: Use string.h, not gdb_string.h.
* i386-sol2-tdep.c: Use string.h, not gdb_string.h.
* i386-tdep.c: Use string.h, not gdb_string.h.
* i386bsd-tdep.c: Use string.h, not gdb_string.h.
* i386gnu-nat.c: Use string.h, not gdb_string.h.
* i386nbsd-tdep.c: Use string.h, not gdb_string.h.
* i386obsd-tdep.c: Use string.h, not gdb_string.h.
* i387-tdep.c: Use string.h, not gdb_string.h.
* ia64-libunwind-tdep.c: Use string.h, not gdb_string.h.
* ia64-linux-nat.c: Use string.h, not gdb_string.h.
* inf-child.c: Use string.h, not gdb_string.h.
* inf-ptrace.c: Use string.h, not gdb_string.h.
* inf-ttrace.c: Use string.h, not gdb_string.h.
* infcall.c: Use string.h, not gdb_string.h.
* infcmd.c: Use string.h, not gdb_string.h.
* inflow.c: Use string.h, not gdb_string.h.
* infrun.c: Use string.h, not gdb_string.h.
* interps.c: Use string.h, not gdb_string.h.
* iq2000-tdep.c: Use string.h, not gdb_string.h.
* irix5-nat.c: Use string.h, not gdb_string.h.
* jv-exp.y: Use string.h, not gdb_string.h.
* jv-lang.c: Use string.h, not gdb_string.h.
* jv-typeprint.c: Use string.h, not gdb_string.h.
* jv-valprint.c: Use string.h, not gdb_string.h.
* language.c: Use string.h, not gdb_string.h.
* linux-fork.c: Use string.h, not gdb_string.h.
* linux-nat.c: Use string.h, not gdb_string.h.
* lm32-tdep.c: Use string.h, not gdb_string.h.
* m2-exp.y: Use string.h, not gdb_string.h.
* m2-typeprint.c: Use string.h, not gdb_string.h.
* m32c-tdep.c: Use string.h, not gdb_string.h.
* m32r-linux-nat.c: Use string.h, not gdb_string.h.
* m32r-linux-tdep.c: Use string.h, not gdb_string.h.
* m32r-rom.c: Use string.h, not gdb_string.h.
* m32r-tdep.c: Use string.h, not gdb_string.h.
* m68hc11-tdep.c: Use string.h, not gdb_string.h.
* m68k-tdep.c: Use string.h, not gdb_string.h.
* m68kbsd-tdep.c: Use string.h, not gdb_string.h.
* m68klinux-nat.c: Use string.h, not gdb_string.h.
* m68klinux-tdep.c: Use string.h, not gdb_string.h.
* m88k-tdep.c: Use string.h, not gdb_string.h.
* macrocmd.c: Use string.h, not gdb_string.h.
* main.c: Use string.h, not gdb_string.h.
* mdebugread.c: Use string.h, not gdb_string.h.
* mem-break.c: Use string.h, not gdb_string.h.
* memattr.c: Use string.h, not gdb_string.h.
* memory-map.c: Use string.h, not gdb_string.h.
* mep-tdep.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-break.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-disas.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-env.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-stack.c: Use string.h, not gdb_string.h.
* mi/mi-cmd-var.c: Use string.h, not gdb_string.h.
* mi/mi-cmds.c: Use string.h, not gdb_string.h.
* mi/mi-console.c: Use string.h, not gdb_string.h.
* mi/mi-getopt.c: Use string.h, not gdb_string.h.
* mi/mi-interp.c: Use string.h, not gdb_string.h.
* mi/mi-main.c: Use string.h, not gdb_string.h.
* mi/mi-parse.c: Use string.h, not gdb_string.h.
* microblaze-rom.c: Use string.h, not gdb_string.h.
* microblaze-tdep.c: Use string.h, not gdb_string.h.
* mingw-hdep.c: Use string.h, not gdb_string.h.
* minidebug.c: Use string.h, not gdb_string.h.
* minsyms.c: Use string.h, not gdb_string.h.
* mips-irix-tdep.c: Use string.h, not gdb_string.h.
* mips-linux-tdep.c: Use string.h, not gdb_string.h.
* mips-tdep.c: Use string.h, not gdb_string.h.
* mips64obsd-tdep.c: Use string.h, not gdb_string.h.
* mipsnbsd-tdep.c: Use string.h, not gdb_string.h.
* mipsread.c: Use string.h, not gdb_string.h.
* mn10300-linux-tdep.c: Use string.h, not gdb_string.h.
* mn10300-tdep.c: Use string.h, not gdb_string.h.
* monitor.c: Use string.h, not gdb_string.h.
* moxie-tdep.c: Use string.h, not gdb_string.h.
* mt-tdep.c: Use string.h, not gdb_string.h.
* nbsd-tdep.c: Use string.h, not gdb_string.h.
* nios2-linux-tdep.c: Use string.h, not gdb_string.h.
* nto-procfs.c: Use string.h, not gdb_string.h.
* nto-tdep.c: Use string.h, not gdb_string.h.
* objc-lang.c: Use string.h, not gdb_string.h.
* objfiles.c: Use string.h, not gdb_string.h.
* opencl-lang.c: Use string.h, not gdb_string.h.
* osabi.c: Use string.h, not gdb_string.h.
* osdata.c: Use string.h, not gdb_string.h.
* p-exp.y: Use string.h, not gdb_string.h.
* p-lang.c: Use string.h, not gdb_string.h.
* p-typeprint.c: Use string.h, not gdb_string.h.
* parse.c: Use string.h, not gdb_string.h.
* posix-hdep.c: Use string.h, not gdb_string.h.
* ppc-linux-nat.c: Use string.h, not gdb_string.h.
* ppc-sysv-tdep.c: Use string.h, not gdb_string.h.
* ppcfbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcnbsd-tdep.c: Use string.h, not gdb_string.h.
* ppcobsd-tdep.c: Use string.h, not gdb_string.h.
* printcmd.c: Use string.h, not gdb_string.h.
* procfs.c: Use string.h, not gdb_string.h.
* prologue-value.c: Use string.h, not gdb_string.h.
* python/py-auto-load.c: Use string.h, not gdb_string.h.
* python/py-gdb-readline.c: Use string.h, not gdb_string.h.
* ravenscar-thread.c: Use string.h, not gdb_string.h.
* regcache.c: Use string.h, not gdb_string.h.
* registry.c: Use string.h, not gdb_string.h.
* remote-fileio.c: Use string.h, not gdb_string.h.
* remote-m32r-sdi.c: Use string.h, not gdb_string.h.
* remote-mips.c: Use string.h, not gdb_string.h.
* remote-sim.c: Use string.h, not gdb_string.h.
* remote.c: Use string.h, not gdb_string.h.
* reverse.c: Use string.h, not gdb_string.h.
* rs6000-aix-tdep.c: Use string.h, not gdb_string.h.
* ser-base.c: Use string.h, not gdb_string.h.
* ser-go32.c: Use string.h, not gdb_string.h.
* ser-mingw.c: Use string.h, not gdb_string.h.
* ser-pipe.c: Use string.h, not gdb_string.h.
* ser-tcp.c: Use string.h, not gdb_string.h.
* ser-unix.c: Use string.h, not gdb_string.h.
* serial.c: Use string.h, not gdb_string.h.
* sh-tdep.c: Use string.h, not gdb_string.h.
* sh64-tdep.c: Use string.h, not gdb_string.h.
* shnbsd-tdep.c: Use string.h, not gdb_string.h.
* skip.c: Use string.h, not gdb_string.h.
* sol-thread.c: Use string.h, not gdb_string.h.
* solib-dsbt.c: Use string.h, not gdb_string.h.
* solib-frv.c: Use string.h, not gdb_string.h.
* solib-osf.c: Use string.h, not gdb_string.h.
* solib-spu.c: Use string.h, not gdb_string.h.
* solib-target.c: Use string.h, not gdb_string.h.
* solib.c: Use string.h, not gdb_string.h.
* somread.c: Use string.h, not gdb_string.h.
* source.c: Use string.h, not gdb_string.h.
* sparc-nat.c: Use string.h, not gdb_string.h.
* sparc-sol2-tdep.c: Use string.h, not gdb_string.h.
* sparc-tdep.c: Use string.h, not gdb_string.h.
* sparc64-tdep.c: Use string.h, not gdb_string.h.
* sparc64fbsd-tdep.c: Use string.h, not gdb_string.h.
* sparc64nbsd-tdep.c: Use string.h, not gdb_string.h.
* sparcnbsd-tdep.c: Use string.h, not gdb_string.h.
* spu-linux-nat.c: Use string.h, not gdb_string.h.
* spu-multiarch.c: Use string.h, not gdb_string.h.
* spu-tdep.c: Use string.h, not gdb_string.h.
* stabsread.c: Use string.h, not gdb_string.h.
* stack.c: Use string.h, not gdb_string.h.
* std-regs.c: Use string.h, not gdb_string.h.
* symfile.c: Use string.h, not gdb_string.h.
* symmisc.c: Use string.h, not gdb_string.h.
* symtab.c: Use string.h, not gdb_string.h.
* target.c: Use string.h, not gdb_string.h.
* thread.c: Use string.h, not gdb_string.h.
* tilegx-linux-nat.c: Use string.h, not gdb_string.h.
* tilegx-tdep.c: Use string.h, not gdb_string.h.
* top.c: Use string.h, not gdb_string.h.
* tracepoint.c: Use string.h, not gdb_string.h.
* tui/tui-command.c: Use string.h, not gdb_string.h.
* tui/tui-data.c: Use string.h, not gdb_string.h.
* tui/tui-disasm.c: Use string.h, not gdb_string.h.
* tui/tui-file.c: Use string.h, not gdb_string.h.
* tui/tui-layout.c: Use string.h, not gdb_string.h.
* tui/tui-out.c: Use string.h, not gdb_string.h.
* tui/tui-regs.c: Use string.h, not gdb_string.h.
* tui/tui-source.c: Use string.h, not gdb_string.h.
* tui/tui-stack.c: Use string.h, not gdb_string.h.
* tui/tui-win.c: Use string.h, not gdb_string.h.
* tui/tui-windata.c: Use string.h, not gdb_string.h.
* tui/tui-winsource.c: Use string.h, not gdb_string.h.
* typeprint.c: Use string.h, not gdb_string.h.
* ui-file.c: Use string.h, not gdb_string.h.
* ui-out.c: Use string.h, not gdb_string.h.
* user-regs.c: Use string.h, not gdb_string.h.
* utils.c: Use string.h, not gdb_string.h.
* v850-tdep.c: Use string.h, not gdb_string.h.
* valarith.c: Use string.h, not gdb_string.h.
* valops.c: Use string.h, not gdb_string.h.
* valprint.c: Use string.h, not gdb_string.h.
* value.c: Use string.h, not gdb_string.h.
* varobj.c: Use string.h, not gdb_string.h.
* vax-tdep.c: Use string.h, not gdb_string.h.
* vaxnbsd-tdep.c: Use string.h, not gdb_string.h.
* vaxobsd-tdep.c: Use string.h, not gdb_string.h.
* windows-nat.c: Use string.h, not gdb_string.h.
* xcoffread.c: Use string.h, not gdb_string.h.
* xml-support.c: Use string.h, not gdb_string.h.
* xstormy16-tdep.c: Use string.h, not gdb_string.h.
* xtensa-linux-nat.c: Use string.h, not gdb_string.h.
1362 lines
42 KiB
C
1362 lines
42 KiB
C
/* GDB routines for manipulating the minimal symbol tables.
|
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Copyright (C) 1992-2013 Free Software Foundation, Inc.
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Contributed by Cygnus Support, using pieces from other GDB modules.
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This file is part of GDB.
|
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|
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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.
|
||
|
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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.
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||
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* This file contains support routines for creating, manipulating, and
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destroying minimal symbol tables.
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Minimal symbol tables are used to hold some very basic information about
|
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all defined global symbols (text, data, bss, abs, etc). The only two
|
||
required pieces of information are the symbol's name and the address
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associated with that symbol.
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|
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In many cases, even if a file was compiled with no special options for
|
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debugging at all, as long as was not stripped it will contain sufficient
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information to build useful minimal symbol tables using this structure.
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Even when a file contains enough debugging information to build a full
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symbol table, these minimal symbols are still useful for quickly mapping
|
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between names and addresses, and vice versa. They are also sometimes used
|
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to figure out what full symbol table entries need to be read in. */
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#include "defs.h"
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#include <ctype.h>
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#include <string.h>
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#include "symtab.h"
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#include "bfd.h"
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#include "filenames.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "demangle.h"
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#include "value.h"
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#include "cp-abi.h"
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#include "target.h"
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#include "cp-support.h"
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#include "language.h"
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#include "cli/cli-utils.h"
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/* Accumulate the minimal symbols for each objfile in bunches of BUNCH_SIZE.
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At the end, copy them all into one newly allocated location on an objfile's
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symbol obstack. */
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#define BUNCH_SIZE 127
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struct msym_bunch
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{
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struct msym_bunch *next;
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struct minimal_symbol contents[BUNCH_SIZE];
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};
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/* Bunch currently being filled up.
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The next field points to chain of filled bunches. */
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|
||
static struct msym_bunch *msym_bunch;
|
||
|
||
/* Number of slots filled in current bunch. */
|
||
|
||
static int msym_bunch_index;
|
||
|
||
/* Total number of minimal symbols recorded so far for the objfile. */
|
||
|
||
static int msym_count;
|
||
|
||
/* See minsyms.h. */
|
||
|
||
unsigned int
|
||
msymbol_hash_iw (const char *string)
|
||
{
|
||
unsigned int hash = 0;
|
||
|
||
while (*string && *string != '(')
|
||
{
|
||
string = skip_spaces_const (string);
|
||
if (*string && *string != '(')
|
||
{
|
||
hash = SYMBOL_HASH_NEXT (hash, *string);
|
||
++string;
|
||
}
|
||
}
|
||
return hash;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
unsigned int
|
||
msymbol_hash (const char *string)
|
||
{
|
||
unsigned int hash = 0;
|
||
|
||
for (; *string; ++string)
|
||
hash = SYMBOL_HASH_NEXT (hash, *string);
|
||
return hash;
|
||
}
|
||
|
||
/* Add the minimal symbol SYM to an objfile's minsym hash table, TABLE. */
|
||
static void
|
||
add_minsym_to_hash_table (struct minimal_symbol *sym,
|
||
struct minimal_symbol **table)
|
||
{
|
||
if (sym->hash_next == NULL)
|
||
{
|
||
unsigned int hash
|
||
= msymbol_hash (SYMBOL_LINKAGE_NAME (sym)) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
sym->hash_next = table[hash];
|
||
table[hash] = sym;
|
||
}
|
||
}
|
||
|
||
/* Add the minimal symbol SYM to an objfile's minsym demangled hash table,
|
||
TABLE. */
|
||
static void
|
||
add_minsym_to_demangled_hash_table (struct minimal_symbol *sym,
|
||
struct minimal_symbol **table)
|
||
{
|
||
if (sym->demangled_hash_next == NULL)
|
||
{
|
||
unsigned int hash = msymbol_hash_iw (SYMBOL_SEARCH_NAME (sym))
|
||
% MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
sym->demangled_hash_next = table[hash];
|
||
table[hash] = sym;
|
||
}
|
||
}
|
||
|
||
/* Look through all the current minimal symbol tables and find the
|
||
first minimal symbol that matches NAME. If OBJF is non-NULL, limit
|
||
the search to that objfile. If SFILE is non-NULL, the only file-scope
|
||
symbols considered will be from that source file (global symbols are
|
||
still preferred). Returns a pointer to the minimal symbol that
|
||
matches, or NULL if no match is found.
|
||
|
||
Note: One instance where there may be duplicate minimal symbols with
|
||
the same name is when the symbol tables for a shared library and the
|
||
symbol tables for an executable contain global symbols with the same
|
||
names (the dynamic linker deals with the duplication).
|
||
|
||
It's also possible to have minimal symbols with different mangled
|
||
names, but identical demangled names. For example, the GNU C++ v3
|
||
ABI requires the generation of two (or perhaps three) copies of
|
||
constructor functions --- "in-charge", "not-in-charge", and
|
||
"allocate" copies; destructors may be duplicated as well.
|
||
Obviously, there must be distinct mangled names for each of these,
|
||
but the demangled names are all the same: S::S or S::~S. */
|
||
|
||
static struct bound_minimal_symbol
|
||
lookup_minimal_symbol_internal (const char *name, const char *sfile,
|
||
struct objfile *objf)
|
||
{
|
||
struct objfile *objfile;
|
||
struct bound_minimal_symbol found_symbol = { NULL, NULL };
|
||
struct bound_minimal_symbol found_file_symbol = { NULL, NULL };
|
||
struct bound_minimal_symbol trampoline_symbol = { NULL, NULL };
|
||
|
||
unsigned int hash = msymbol_hash (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
unsigned int dem_hash = msymbol_hash_iw (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
int needtofreename = 0;
|
||
const char *modified_name;
|
||
|
||
if (sfile != NULL)
|
||
sfile = lbasename (sfile);
|
||
|
||
/* For C++, canonicalize the input name. */
|
||
modified_name = name;
|
||
if (current_language->la_language == language_cplus)
|
||
{
|
||
char *cname = cp_canonicalize_string (name);
|
||
|
||
if (cname)
|
||
{
|
||
modified_name = cname;
|
||
needtofreename = 1;
|
||
}
|
||
}
|
||
|
||
for (objfile = object_files;
|
||
objfile != NULL && found_symbol.minsym == NULL;
|
||
objfile = objfile->next)
|
||
{
|
||
struct minimal_symbol *msymbol;
|
||
|
||
if (objf == NULL || objf == objfile
|
||
|| objf == objfile->separate_debug_objfile_backlink)
|
||
{
|
||
/* Do two passes: the first over the ordinary hash table,
|
||
and the second over the demangled hash table. */
|
||
int pass;
|
||
|
||
for (pass = 1; pass <= 2 && found_symbol.minsym == NULL; pass++)
|
||
{
|
||
/* Select hash list according to pass. */
|
||
if (pass == 1)
|
||
msymbol = objfile->msymbol_hash[hash];
|
||
else
|
||
msymbol = objfile->msymbol_demangled_hash[dem_hash];
|
||
|
||
while (msymbol != NULL && found_symbol.minsym == NULL)
|
||
{
|
||
int match;
|
||
|
||
if (pass == 1)
|
||
{
|
||
int (*cmp) (const char *, const char *);
|
||
|
||
cmp = (case_sensitivity == case_sensitive_on
|
||
? strcmp : strcasecmp);
|
||
match = cmp (SYMBOL_LINKAGE_NAME (msymbol),
|
||
modified_name) == 0;
|
||
}
|
||
else
|
||
{
|
||
/* The function respects CASE_SENSITIVITY. */
|
||
match = SYMBOL_MATCHES_SEARCH_NAME (msymbol,
|
||
modified_name);
|
||
}
|
||
|
||
if (match)
|
||
{
|
||
switch (MSYMBOL_TYPE (msymbol))
|
||
{
|
||
case mst_file_text:
|
||
case mst_file_data:
|
||
case mst_file_bss:
|
||
if (sfile == NULL
|
||
|| filename_cmp (msymbol->filename, sfile) == 0)
|
||
{
|
||
found_file_symbol.minsym = msymbol;
|
||
found_file_symbol.objfile = objfile;
|
||
}
|
||
break;
|
||
|
||
case mst_solib_trampoline:
|
||
|
||
/* If a trampoline symbol is found, we prefer to
|
||
keep looking for the *real* symbol. If the
|
||
actual symbol is not found, then we'll use the
|
||
trampoline entry. */
|
||
if (trampoline_symbol.minsym == NULL)
|
||
{
|
||
trampoline_symbol.minsym = msymbol;
|
||
trampoline_symbol.objfile = objfile;
|
||
}
|
||
break;
|
||
|
||
case mst_unknown:
|
||
default:
|
||
found_symbol.minsym = msymbol;
|
||
found_symbol.objfile = objfile;
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Find the next symbol on the hash chain. */
|
||
if (pass == 1)
|
||
msymbol = msymbol->hash_next;
|
||
else
|
||
msymbol = msymbol->demangled_hash_next;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
if (needtofreename)
|
||
xfree ((void *) modified_name);
|
||
|
||
/* External symbols are best. */
|
||
if (found_symbol.minsym != NULL)
|
||
return found_symbol;
|
||
|
||
/* File-local symbols are next best. */
|
||
if (found_file_symbol.minsym != NULL)
|
||
return found_file_symbol;
|
||
|
||
/* Symbols for shared library trampolines are next best. */
|
||
return trampoline_symbol;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct minimal_symbol *
|
||
lookup_minimal_symbol (const char *name, const char *sfile,
|
||
struct objfile *objf)
|
||
{
|
||
struct bound_minimal_symbol bms = lookup_minimal_symbol_internal (name,
|
||
sfile,
|
||
objf);
|
||
|
||
return bms.minsym;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct bound_minimal_symbol
|
||
lookup_bound_minimal_symbol (const char *name)
|
||
{
|
||
return lookup_minimal_symbol_internal (name, NULL, NULL);
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
void
|
||
iterate_over_minimal_symbols (struct objfile *objf, const char *name,
|
||
void (*callback) (struct minimal_symbol *,
|
||
void *),
|
||
void *user_data)
|
||
{
|
||
unsigned int hash;
|
||
struct minimal_symbol *iter;
|
||
int (*cmp) (const char *, const char *);
|
||
|
||
/* The first pass is over the ordinary hash table. */
|
||
hash = msymbol_hash (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
iter = objf->msymbol_hash[hash];
|
||
cmp = (case_sensitivity == case_sensitive_on ? strcmp : strcasecmp);
|
||
while (iter)
|
||
{
|
||
if (cmp (SYMBOL_LINKAGE_NAME (iter), name) == 0)
|
||
(*callback) (iter, user_data);
|
||
iter = iter->hash_next;
|
||
}
|
||
|
||
/* The second pass is over the demangled table. */
|
||
hash = msymbol_hash_iw (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
iter = objf->msymbol_demangled_hash[hash];
|
||
while (iter)
|
||
{
|
||
if (SYMBOL_MATCHES_SEARCH_NAME (iter, name))
|
||
(*callback) (iter, user_data);
|
||
iter = iter->demangled_hash_next;
|
||
}
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct minimal_symbol *
|
||
lookup_minimal_symbol_text (const char *name, struct objfile *objf)
|
||
{
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
struct minimal_symbol *found_symbol = NULL;
|
||
struct minimal_symbol *found_file_symbol = NULL;
|
||
|
||
unsigned int hash = msymbol_hash (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
for (objfile = object_files;
|
||
objfile != NULL && found_symbol == NULL;
|
||
objfile = objfile->next)
|
||
{
|
||
if (objf == NULL || objf == objfile
|
||
|| objf == objfile->separate_debug_objfile_backlink)
|
||
{
|
||
for (msymbol = objfile->msymbol_hash[hash];
|
||
msymbol != NULL && found_symbol == NULL;
|
||
msymbol = msymbol->hash_next)
|
||
{
|
||
if (strcmp (SYMBOL_LINKAGE_NAME (msymbol), name) == 0 &&
|
||
(MSYMBOL_TYPE (msymbol) == mst_text
|
||
|| MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc
|
||
|| MSYMBOL_TYPE (msymbol) == mst_file_text))
|
||
{
|
||
switch (MSYMBOL_TYPE (msymbol))
|
||
{
|
||
case mst_file_text:
|
||
found_file_symbol = msymbol;
|
||
break;
|
||
default:
|
||
found_symbol = msymbol;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
/* External symbols are best. */
|
||
if (found_symbol)
|
||
return found_symbol;
|
||
|
||
/* File-local symbols are next best. */
|
||
if (found_file_symbol)
|
||
return found_file_symbol;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct minimal_symbol *
|
||
lookup_minimal_symbol_by_pc_name (CORE_ADDR pc, const char *name,
|
||
struct objfile *objf)
|
||
{
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
|
||
unsigned int hash = msymbol_hash (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
for (objfile = object_files;
|
||
objfile != NULL;
|
||
objfile = objfile->next)
|
||
{
|
||
if (objf == NULL || objf == objfile
|
||
|| objf == objfile->separate_debug_objfile_backlink)
|
||
{
|
||
for (msymbol = objfile->msymbol_hash[hash];
|
||
msymbol != NULL;
|
||
msymbol = msymbol->hash_next)
|
||
{
|
||
if (SYMBOL_VALUE_ADDRESS (msymbol) == pc
|
||
&& strcmp (SYMBOL_LINKAGE_NAME (msymbol), name) == 0)
|
||
return msymbol;
|
||
}
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct minimal_symbol *
|
||
lookup_minimal_symbol_solib_trampoline (const char *name,
|
||
struct objfile *objf)
|
||
{
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
struct minimal_symbol *found_symbol = NULL;
|
||
|
||
unsigned int hash = msymbol_hash (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
for (objfile = object_files;
|
||
objfile != NULL && found_symbol == NULL;
|
||
objfile = objfile->next)
|
||
{
|
||
if (objf == NULL || objf == objfile
|
||
|| objf == objfile->separate_debug_objfile_backlink)
|
||
{
|
||
for (msymbol = objfile->msymbol_hash[hash];
|
||
msymbol != NULL && found_symbol == NULL;
|
||
msymbol = msymbol->hash_next)
|
||
{
|
||
if (strcmp (SYMBOL_LINKAGE_NAME (msymbol), name) == 0 &&
|
||
MSYMBOL_TYPE (msymbol) == mst_solib_trampoline)
|
||
return msymbol;
|
||
}
|
||
}
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Search through the minimal symbol table for each objfile and find
|
||
the symbol whose address is the largest address that is still less
|
||
than or equal to PC, and matches SECTION (which is not NULL).
|
||
Returns a pointer to the minimal symbol if such a symbol is found,
|
||
or NULL if PC is not in a suitable range.
|
||
Note that we need to look through ALL the minimal symbol tables
|
||
before deciding on the symbol that comes closest to the specified PC.
|
||
This is because objfiles can overlap, for example objfile A has .text
|
||
at 0x100 and .data at 0x40000 and objfile B has .text at 0x234 and
|
||
.data at 0x40048.
|
||
|
||
If WANT_TRAMPOLINE is set, prefer mst_solib_trampoline symbols when
|
||
there are text and trampoline symbols at the same address.
|
||
Otherwise prefer mst_text symbols. */
|
||
|
||
static struct bound_minimal_symbol
|
||
lookup_minimal_symbol_by_pc_section_1 (CORE_ADDR pc,
|
||
struct obj_section *section,
|
||
int want_trampoline)
|
||
{
|
||
int lo;
|
||
int hi;
|
||
int new;
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
struct minimal_symbol *best_symbol = NULL;
|
||
struct objfile *best_objfile = NULL;
|
||
struct bound_minimal_symbol result;
|
||
enum minimal_symbol_type want_type, other_type;
|
||
|
||
want_type = want_trampoline ? mst_solib_trampoline : mst_text;
|
||
other_type = want_trampoline ? mst_text : mst_solib_trampoline;
|
||
|
||
/* We can not require the symbol found to be in section, because
|
||
e.g. IRIX 6.5 mdebug relies on this code returning an absolute
|
||
symbol - but find_pc_section won't return an absolute section and
|
||
hence the code below would skip over absolute symbols. We can
|
||
still take advantage of the call to find_pc_section, though - the
|
||
object file still must match. In case we have separate debug
|
||
files, search both the file and its separate debug file. There's
|
||
no telling which one will have the minimal symbols. */
|
||
|
||
gdb_assert (section != NULL);
|
||
|
||
for (objfile = section->objfile;
|
||
objfile != NULL;
|
||
objfile = objfile_separate_debug_iterate (section->objfile, objfile))
|
||
{
|
||
/* If this objfile has a minimal symbol table, go search it using
|
||
a binary search. Note that a minimal symbol table always consists
|
||
of at least two symbols, a "real" symbol and the terminating
|
||
"null symbol". If there are no real symbols, then there is no
|
||
minimal symbol table at all. */
|
||
|
||
if (objfile->minimal_symbol_count > 0)
|
||
{
|
||
int best_zero_sized = -1;
|
||
|
||
msymbol = objfile->msymbols;
|
||
lo = 0;
|
||
hi = objfile->minimal_symbol_count - 1;
|
||
|
||
/* This code assumes that the minimal symbols are sorted by
|
||
ascending address values. If the pc value is greater than or
|
||
equal to the first symbol's address, then some symbol in this
|
||
minimal symbol table is a suitable candidate for being the
|
||
"best" symbol. This includes the last real symbol, for cases
|
||
where the pc value is larger than any address in this vector.
|
||
|
||
By iterating until the address associated with the current
|
||
hi index (the endpoint of the test interval) is less than
|
||
or equal to the desired pc value, we accomplish two things:
|
||
(1) the case where the pc value is larger than any minimal
|
||
symbol address is trivially solved, (2) the address associated
|
||
with the hi index is always the one we want when the interation
|
||
terminates. In essence, we are iterating the test interval
|
||
down until the pc value is pushed out of it from the high end.
|
||
|
||
Warning: this code is trickier than it would appear at first. */
|
||
|
||
/* Should also require that pc is <= end of objfile. FIXME! */
|
||
if (pc >= SYMBOL_VALUE_ADDRESS (&msymbol[lo]))
|
||
{
|
||
while (SYMBOL_VALUE_ADDRESS (&msymbol[hi]) > pc)
|
||
{
|
||
/* pc is still strictly less than highest address. */
|
||
/* Note "new" will always be >= lo. */
|
||
new = (lo + hi) / 2;
|
||
if ((SYMBOL_VALUE_ADDRESS (&msymbol[new]) >= pc) ||
|
||
(lo == new))
|
||
{
|
||
hi = new;
|
||
}
|
||
else
|
||
{
|
||
lo = new;
|
||
}
|
||
}
|
||
|
||
/* If we have multiple symbols at the same address, we want
|
||
hi to point to the last one. That way we can find the
|
||
right symbol if it has an index greater than hi. */
|
||
while (hi < objfile->minimal_symbol_count - 1
|
||
&& (SYMBOL_VALUE_ADDRESS (&msymbol[hi])
|
||
== SYMBOL_VALUE_ADDRESS (&msymbol[hi + 1])))
|
||
hi++;
|
||
|
||
/* Skip various undesirable symbols. */
|
||
while (hi >= 0)
|
||
{
|
||
/* Skip any absolute symbols. This is apparently
|
||
what adb and dbx do, and is needed for the CM-5.
|
||
There are two known possible problems: (1) on
|
||
ELF, apparently end, edata, etc. are absolute.
|
||
Not sure ignoring them here is a big deal, but if
|
||
we want to use them, the fix would go in
|
||
elfread.c. (2) I think shared library entry
|
||
points on the NeXT are absolute. If we want
|
||
special handling for this it probably should be
|
||
triggered by a special mst_abs_or_lib or some
|
||
such. */
|
||
|
||
if (MSYMBOL_TYPE (&msymbol[hi]) == mst_abs)
|
||
{
|
||
hi--;
|
||
continue;
|
||
}
|
||
|
||
/* If SECTION was specified, skip any symbol from
|
||
wrong section. */
|
||
if (section
|
||
/* Some types of debug info, such as COFF,
|
||
don't fill the bfd_section member, so don't
|
||
throw away symbols on those platforms. */
|
||
&& SYMBOL_OBJ_SECTION (objfile, &msymbol[hi]) != NULL
|
||
&& (!matching_obj_sections
|
||
(SYMBOL_OBJ_SECTION (objfile, &msymbol[hi]),
|
||
section)))
|
||
{
|
||
hi--;
|
||
continue;
|
||
}
|
||
|
||
/* If we are looking for a trampoline and this is a
|
||
text symbol, or the other way around, check the
|
||
preceding symbol too. If they are otherwise
|
||
identical prefer that one. */
|
||
if (hi > 0
|
||
&& MSYMBOL_TYPE (&msymbol[hi]) == other_type
|
||
&& MSYMBOL_TYPE (&msymbol[hi - 1]) == want_type
|
||
&& (MSYMBOL_SIZE (&msymbol[hi])
|
||
== MSYMBOL_SIZE (&msymbol[hi - 1]))
|
||
&& (SYMBOL_VALUE_ADDRESS (&msymbol[hi])
|
||
== SYMBOL_VALUE_ADDRESS (&msymbol[hi - 1]))
|
||
&& (SYMBOL_OBJ_SECTION (objfile, &msymbol[hi])
|
||
== SYMBOL_OBJ_SECTION (objfile, &msymbol[hi - 1])))
|
||
{
|
||
hi--;
|
||
continue;
|
||
}
|
||
|
||
/* If the minimal symbol has a zero size, save it
|
||
but keep scanning backwards looking for one with
|
||
a non-zero size. A zero size may mean that the
|
||
symbol isn't an object or function (e.g. a
|
||
label), or it may just mean that the size was not
|
||
specified. */
|
||
if (MSYMBOL_SIZE (&msymbol[hi]) == 0
|
||
&& best_zero_sized == -1)
|
||
{
|
||
best_zero_sized = hi;
|
||
hi--;
|
||
continue;
|
||
}
|
||
|
||
/* If we are past the end of the current symbol, try
|
||
the previous symbol if it has a larger overlapping
|
||
size. This happens on i686-pc-linux-gnu with glibc;
|
||
the nocancel variants of system calls are inside
|
||
the cancellable variants, but both have sizes. */
|
||
if (hi > 0
|
||
&& MSYMBOL_SIZE (&msymbol[hi]) != 0
|
||
&& pc >= (SYMBOL_VALUE_ADDRESS (&msymbol[hi])
|
||
+ MSYMBOL_SIZE (&msymbol[hi]))
|
||
&& pc < (SYMBOL_VALUE_ADDRESS (&msymbol[hi - 1])
|
||
+ MSYMBOL_SIZE (&msymbol[hi - 1])))
|
||
{
|
||
hi--;
|
||
continue;
|
||
}
|
||
|
||
/* Otherwise, this symbol must be as good as we're going
|
||
to get. */
|
||
break;
|
||
}
|
||
|
||
/* If HI has a zero size, and best_zero_sized is set,
|
||
then we had two or more zero-sized symbols; prefer
|
||
the first one we found (which may have a higher
|
||
address). Also, if we ran off the end, be sure
|
||
to back up. */
|
||
if (best_zero_sized != -1
|
||
&& (hi < 0 || MSYMBOL_SIZE (&msymbol[hi]) == 0))
|
||
hi = best_zero_sized;
|
||
|
||
/* If the minimal symbol has a non-zero size, and this
|
||
PC appears to be outside the symbol's contents, then
|
||
refuse to use this symbol. If we found a zero-sized
|
||
symbol with an address greater than this symbol's,
|
||
use that instead. We assume that if symbols have
|
||
specified sizes, they do not overlap. */
|
||
|
||
if (hi >= 0
|
||
&& MSYMBOL_SIZE (&msymbol[hi]) != 0
|
||
&& pc >= (SYMBOL_VALUE_ADDRESS (&msymbol[hi])
|
||
+ MSYMBOL_SIZE (&msymbol[hi])))
|
||
{
|
||
if (best_zero_sized != -1)
|
||
hi = best_zero_sized;
|
||
else
|
||
/* Go on to the next object file. */
|
||
continue;
|
||
}
|
||
|
||
/* The minimal symbol indexed by hi now is the best one in this
|
||
objfile's minimal symbol table. See if it is the best one
|
||
overall. */
|
||
|
||
if (hi >= 0
|
||
&& ((best_symbol == NULL) ||
|
||
(SYMBOL_VALUE_ADDRESS (best_symbol) <
|
||
SYMBOL_VALUE_ADDRESS (&msymbol[hi]))))
|
||
{
|
||
best_symbol = &msymbol[hi];
|
||
best_objfile = objfile;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
result.minsym = best_symbol;
|
||
result.objfile = best_objfile;
|
||
return result;
|
||
}
|
||
|
||
struct bound_minimal_symbol
|
||
lookup_minimal_symbol_by_pc_section (CORE_ADDR pc, struct obj_section *section)
|
||
{
|
||
if (section == NULL)
|
||
{
|
||
/* NOTE: cagney/2004-01-27: This was using find_pc_mapped_section to
|
||
force the section but that (well unless you're doing overlay
|
||
debugging) always returns NULL making the call somewhat useless. */
|
||
section = find_pc_section (pc);
|
||
if (section == NULL)
|
||
{
|
||
struct bound_minimal_symbol result;
|
||
|
||
memset (&result, 0, sizeof (result));
|
||
return result;
|
||
}
|
||
}
|
||
return lookup_minimal_symbol_by_pc_section_1 (pc, section, 0);
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct bound_minimal_symbol
|
||
lookup_minimal_symbol_by_pc (CORE_ADDR pc)
|
||
{
|
||
struct obj_section *section = find_pc_section (pc);
|
||
|
||
if (section == NULL)
|
||
{
|
||
struct bound_minimal_symbol result;
|
||
|
||
memset (&result, 0, sizeof (result));
|
||
return result;
|
||
}
|
||
return lookup_minimal_symbol_by_pc_section_1 (pc, section, 0);
|
||
}
|
||
|
||
/* Return non-zero iff PC is in an STT_GNU_IFUNC function resolver. */
|
||
|
||
int
|
||
in_gnu_ifunc_stub (CORE_ADDR pc)
|
||
{
|
||
struct bound_minimal_symbol msymbol = lookup_minimal_symbol_by_pc (pc);
|
||
|
||
return msymbol.minsym && MSYMBOL_TYPE (msymbol.minsym) == mst_text_gnu_ifunc;
|
||
}
|
||
|
||
/* See elf_gnu_ifunc_resolve_addr for its real implementation. */
|
||
|
||
static CORE_ADDR
|
||
stub_gnu_ifunc_resolve_addr (struct gdbarch *gdbarch, CORE_ADDR pc)
|
||
{
|
||
error (_("GDB cannot resolve STT_GNU_IFUNC symbol at address %s without "
|
||
"the ELF support compiled in."),
|
||
paddress (gdbarch, pc));
|
||
}
|
||
|
||
/* See elf_gnu_ifunc_resolve_name for its real implementation. */
|
||
|
||
static int
|
||
stub_gnu_ifunc_resolve_name (const char *function_name,
|
||
CORE_ADDR *function_address_p)
|
||
{
|
||
error (_("GDB cannot resolve STT_GNU_IFUNC symbol \"%s\" without "
|
||
"the ELF support compiled in."),
|
||
function_name);
|
||
}
|
||
|
||
/* See elf_gnu_ifunc_resolver_stop for its real implementation. */
|
||
|
||
static void
|
||
stub_gnu_ifunc_resolver_stop (struct breakpoint *b)
|
||
{
|
||
internal_error (__FILE__, __LINE__,
|
||
_("elf_gnu_ifunc_resolver_stop cannot be reached."));
|
||
}
|
||
|
||
/* See elf_gnu_ifunc_resolver_return_stop for its real implementation. */
|
||
|
||
static void
|
||
stub_gnu_ifunc_resolver_return_stop (struct breakpoint *b)
|
||
{
|
||
internal_error (__FILE__, __LINE__,
|
||
_("elf_gnu_ifunc_resolver_return_stop cannot be reached."));
|
||
}
|
||
|
||
/* See elf_gnu_ifunc_fns for its real implementation. */
|
||
|
||
static const struct gnu_ifunc_fns stub_gnu_ifunc_fns =
|
||
{
|
||
stub_gnu_ifunc_resolve_addr,
|
||
stub_gnu_ifunc_resolve_name,
|
||
stub_gnu_ifunc_resolver_stop,
|
||
stub_gnu_ifunc_resolver_return_stop,
|
||
};
|
||
|
||
/* A placeholder for &elf_gnu_ifunc_fns. */
|
||
|
||
const struct gnu_ifunc_fns *gnu_ifunc_fns_p = &stub_gnu_ifunc_fns;
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct bound_minimal_symbol
|
||
lookup_minimal_symbol_and_objfile (const char *name)
|
||
{
|
||
struct bound_minimal_symbol result;
|
||
struct objfile *objfile;
|
||
unsigned int hash = msymbol_hash (name) % MINIMAL_SYMBOL_HASH_SIZE;
|
||
|
||
ALL_OBJFILES (objfile)
|
||
{
|
||
struct minimal_symbol *msym;
|
||
|
||
for (msym = objfile->msymbol_hash[hash];
|
||
msym != NULL;
|
||
msym = msym->hash_next)
|
||
{
|
||
if (strcmp (SYMBOL_LINKAGE_NAME (msym), name) == 0)
|
||
{
|
||
result.minsym = msym;
|
||
result.objfile = objfile;
|
||
return result;
|
||
}
|
||
}
|
||
}
|
||
|
||
memset (&result, 0, sizeof (result));
|
||
return result;
|
||
}
|
||
|
||
|
||
/* Return leading symbol character for a BFD. If BFD is NULL,
|
||
return the leading symbol character from the main objfile. */
|
||
|
||
static int get_symbol_leading_char (bfd *);
|
||
|
||
static int
|
||
get_symbol_leading_char (bfd *abfd)
|
||
{
|
||
if (abfd != NULL)
|
||
return bfd_get_symbol_leading_char (abfd);
|
||
if (symfile_objfile != NULL && symfile_objfile->obfd != NULL)
|
||
return bfd_get_symbol_leading_char (symfile_objfile->obfd);
|
||
return 0;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
void
|
||
init_minimal_symbol_collection (void)
|
||
{
|
||
msym_count = 0;
|
||
msym_bunch = NULL;
|
||
/* Note that presetting msym_bunch_index to BUNCH_SIZE causes the
|
||
first call to save a minimal symbol to allocate the memory for
|
||
the first bunch. */
|
||
msym_bunch_index = BUNCH_SIZE;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
void
|
||
prim_record_minimal_symbol (const char *name, CORE_ADDR address,
|
||
enum minimal_symbol_type ms_type,
|
||
struct objfile *objfile)
|
||
{
|
||
int section;
|
||
|
||
switch (ms_type)
|
||
{
|
||
case mst_text:
|
||
case mst_text_gnu_ifunc:
|
||
case mst_file_text:
|
||
case mst_solib_trampoline:
|
||
section = SECT_OFF_TEXT (objfile);
|
||
break;
|
||
case mst_data:
|
||
case mst_file_data:
|
||
section = SECT_OFF_DATA (objfile);
|
||
break;
|
||
case mst_bss:
|
||
case mst_file_bss:
|
||
section = SECT_OFF_BSS (objfile);
|
||
break;
|
||
default:
|
||
section = -1;
|
||
}
|
||
|
||
prim_record_minimal_symbol_and_info (name, address, ms_type,
|
||
section, objfile);
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct minimal_symbol *
|
||
prim_record_minimal_symbol_full (const char *name, int name_len, int copy_name,
|
||
CORE_ADDR address,
|
||
enum minimal_symbol_type ms_type,
|
||
int section,
|
||
struct objfile *objfile)
|
||
{
|
||
struct obj_section *obj_section;
|
||
struct msym_bunch *new;
|
||
struct minimal_symbol *msymbol;
|
||
|
||
/* Don't put gcc_compiled, __gnu_compiled_cplus, and friends into
|
||
the minimal symbols, because if there is also another symbol
|
||
at the same address (e.g. the first function of the file),
|
||
lookup_minimal_symbol_by_pc would have no way of getting the
|
||
right one. */
|
||
if (ms_type == mst_file_text && name[0] == 'g'
|
||
&& (strcmp (name, GCC_COMPILED_FLAG_SYMBOL) == 0
|
||
|| strcmp (name, GCC2_COMPILED_FLAG_SYMBOL) == 0))
|
||
return (NULL);
|
||
|
||
/* It's safe to strip the leading char here once, since the name
|
||
is also stored stripped in the minimal symbol table. */
|
||
if (name[0] == get_symbol_leading_char (objfile->obfd))
|
||
{
|
||
++name;
|
||
--name_len;
|
||
}
|
||
|
||
if (ms_type == mst_file_text && strncmp (name, "__gnu_compiled", 14) == 0)
|
||
return (NULL);
|
||
|
||
if (msym_bunch_index == BUNCH_SIZE)
|
||
{
|
||
new = XCALLOC (1, struct msym_bunch);
|
||
msym_bunch_index = 0;
|
||
new->next = msym_bunch;
|
||
msym_bunch = new;
|
||
}
|
||
msymbol = &msym_bunch->contents[msym_bunch_index];
|
||
SYMBOL_SET_LANGUAGE (msymbol, language_auto, &objfile->objfile_obstack);
|
||
SYMBOL_SET_NAMES (msymbol, name, name_len, copy_name, objfile);
|
||
|
||
SYMBOL_VALUE_ADDRESS (msymbol) = address;
|
||
SYMBOL_SECTION (msymbol) = section;
|
||
|
||
MSYMBOL_TYPE (msymbol) = ms_type;
|
||
MSYMBOL_TARGET_FLAG_1 (msymbol) = 0;
|
||
MSYMBOL_TARGET_FLAG_2 (msymbol) = 0;
|
||
/* Do not use the SET_MSYMBOL_SIZE macro to initialize the size,
|
||
as it would also set the has_size flag. */
|
||
msymbol->size = 0;
|
||
|
||
/* The hash pointers must be cleared! If they're not,
|
||
add_minsym_to_hash_table will NOT add this msymbol to the hash table. */
|
||
msymbol->hash_next = NULL;
|
||
msymbol->demangled_hash_next = NULL;
|
||
|
||
msym_bunch_index++;
|
||
msym_count++;
|
||
OBJSTAT (objfile, n_minsyms++);
|
||
return msymbol;
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct minimal_symbol *
|
||
prim_record_minimal_symbol_and_info (const char *name, CORE_ADDR address,
|
||
enum minimal_symbol_type ms_type,
|
||
int section,
|
||
struct objfile *objfile)
|
||
{
|
||
return prim_record_minimal_symbol_full (name, strlen (name), 1,
|
||
address, ms_type,
|
||
section, objfile);
|
||
}
|
||
|
||
/* Compare two minimal symbols by address and return a signed result based
|
||
on unsigned comparisons, so that we sort into unsigned numeric order.
|
||
Within groups with the same address, sort by name. */
|
||
|
||
static int
|
||
compare_minimal_symbols (const void *fn1p, const void *fn2p)
|
||
{
|
||
const struct minimal_symbol *fn1;
|
||
const struct minimal_symbol *fn2;
|
||
|
||
fn1 = (const struct minimal_symbol *) fn1p;
|
||
fn2 = (const struct minimal_symbol *) fn2p;
|
||
|
||
if (SYMBOL_VALUE_ADDRESS (fn1) < SYMBOL_VALUE_ADDRESS (fn2))
|
||
{
|
||
return (-1); /* addr 1 is less than addr 2. */
|
||
}
|
||
else if (SYMBOL_VALUE_ADDRESS (fn1) > SYMBOL_VALUE_ADDRESS (fn2))
|
||
{
|
||
return (1); /* addr 1 is greater than addr 2. */
|
||
}
|
||
else
|
||
/* addrs are equal: sort by name */
|
||
{
|
||
const char *name1 = SYMBOL_LINKAGE_NAME (fn1);
|
||
const char *name2 = SYMBOL_LINKAGE_NAME (fn2);
|
||
|
||
if (name1 && name2) /* both have names */
|
||
return strcmp (name1, name2);
|
||
else if (name2)
|
||
return 1; /* fn1 has no name, so it is "less". */
|
||
else if (name1) /* fn2 has no name, so it is "less". */
|
||
return -1;
|
||
else
|
||
return (0); /* Neither has a name, so they're equal. */
|
||
}
|
||
}
|
||
|
||
/* Discard the currently collected minimal symbols, if any. If we wish
|
||
to save them for later use, we must have already copied them somewhere
|
||
else before calling this function.
|
||
|
||
FIXME: We could allocate the minimal symbol bunches on their own
|
||
obstack and then simply blow the obstack away when we are done with
|
||
it. Is it worth the extra trouble though? */
|
||
|
||
static void
|
||
do_discard_minimal_symbols_cleanup (void *arg)
|
||
{
|
||
struct msym_bunch *next;
|
||
|
||
while (msym_bunch != NULL)
|
||
{
|
||
next = msym_bunch->next;
|
||
xfree (msym_bunch);
|
||
msym_bunch = next;
|
||
}
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
struct cleanup *
|
||
make_cleanup_discard_minimal_symbols (void)
|
||
{
|
||
return make_cleanup (do_discard_minimal_symbols_cleanup, 0);
|
||
}
|
||
|
||
|
||
|
||
/* Compact duplicate entries out of a minimal symbol table by walking
|
||
through the table and compacting out entries with duplicate addresses
|
||
and matching names. Return the number of entries remaining.
|
||
|
||
On entry, the table resides between msymbol[0] and msymbol[mcount].
|
||
On exit, it resides between msymbol[0] and msymbol[result_count].
|
||
|
||
When files contain multiple sources of symbol information, it is
|
||
possible for the minimal symbol table to contain many duplicate entries.
|
||
As an example, SVR4 systems use ELF formatted object files, which
|
||
usually contain at least two different types of symbol tables (a
|
||
standard ELF one and a smaller dynamic linking table), as well as
|
||
DWARF debugging information for files compiled with -g.
|
||
|
||
Without compacting, the minimal symbol table for gdb itself contains
|
||
over a 1000 duplicates, about a third of the total table size. Aside
|
||
from the potential trap of not noticing that two successive entries
|
||
identify the same location, this duplication impacts the time required
|
||
to linearly scan the table, which is done in a number of places. So we
|
||
just do one linear scan here and toss out the duplicates.
|
||
|
||
Note that we are not concerned here about recovering the space that
|
||
is potentially freed up, because the strings themselves are allocated
|
||
on the objfile_obstack, and will get automatically freed when the symbol
|
||
table is freed. The caller can free up the unused minimal symbols at
|
||
the end of the compacted region if their allocation strategy allows it.
|
||
|
||
Also note we only go up to the next to last entry within the loop
|
||
and then copy the last entry explicitly after the loop terminates.
|
||
|
||
Since the different sources of information for each symbol may
|
||
have different levels of "completeness", we may have duplicates
|
||
that have one entry with type "mst_unknown" and the other with a
|
||
known type. So if the one we are leaving alone has type mst_unknown,
|
||
overwrite its type with the type from the one we are compacting out. */
|
||
|
||
static int
|
||
compact_minimal_symbols (struct minimal_symbol *msymbol, int mcount,
|
||
struct objfile *objfile)
|
||
{
|
||
struct minimal_symbol *copyfrom;
|
||
struct minimal_symbol *copyto;
|
||
|
||
if (mcount > 0)
|
||
{
|
||
copyfrom = copyto = msymbol;
|
||
while (copyfrom < msymbol + mcount - 1)
|
||
{
|
||
if (SYMBOL_VALUE_ADDRESS (copyfrom)
|
||
== SYMBOL_VALUE_ADDRESS ((copyfrom + 1))
|
||
&& strcmp (SYMBOL_LINKAGE_NAME (copyfrom),
|
||
SYMBOL_LINKAGE_NAME ((copyfrom + 1))) == 0)
|
||
{
|
||
if (MSYMBOL_TYPE ((copyfrom + 1)) == mst_unknown)
|
||
{
|
||
MSYMBOL_TYPE ((copyfrom + 1)) = MSYMBOL_TYPE (copyfrom);
|
||
}
|
||
copyfrom++;
|
||
}
|
||
else
|
||
*copyto++ = *copyfrom++;
|
||
}
|
||
*copyto++ = *copyfrom++;
|
||
mcount = copyto - msymbol;
|
||
}
|
||
return (mcount);
|
||
}
|
||
|
||
/* Build (or rebuild) the minimal symbol hash tables. This is necessary
|
||
after compacting or sorting the table since the entries move around
|
||
thus causing the internal minimal_symbol pointers to become jumbled. */
|
||
|
||
static void
|
||
build_minimal_symbol_hash_tables (struct objfile *objfile)
|
||
{
|
||
int i;
|
||
struct minimal_symbol *msym;
|
||
|
||
/* Clear the hash tables. */
|
||
for (i = 0; i < MINIMAL_SYMBOL_HASH_SIZE; i++)
|
||
{
|
||
objfile->msymbol_hash[i] = 0;
|
||
objfile->msymbol_demangled_hash[i] = 0;
|
||
}
|
||
|
||
/* Now, (re)insert the actual entries. */
|
||
for (i = objfile->minimal_symbol_count, msym = objfile->msymbols;
|
||
i > 0;
|
||
i--, msym++)
|
||
{
|
||
msym->hash_next = 0;
|
||
add_minsym_to_hash_table (msym, objfile->msymbol_hash);
|
||
|
||
msym->demangled_hash_next = 0;
|
||
if (SYMBOL_SEARCH_NAME (msym) != SYMBOL_LINKAGE_NAME (msym))
|
||
add_minsym_to_demangled_hash_table (msym,
|
||
objfile->msymbol_demangled_hash);
|
||
}
|
||
}
|
||
|
||
/* Add the minimal symbols in the existing bunches to the objfile's official
|
||
minimal symbol table. In most cases there is no minimal symbol table yet
|
||
for this objfile, and the existing bunches are used to create one. Once
|
||
in a while (for shared libraries for example), we add symbols (e.g. common
|
||
symbols) to an existing objfile.
|
||
|
||
Because of the way minimal symbols are collected, we generally have no way
|
||
of knowing what source language applies to any particular minimal symbol.
|
||
Specifically, we have no way of knowing if the minimal symbol comes from a
|
||
C++ compilation unit or not. So for the sake of supporting cached
|
||
demangled C++ names, we have no choice but to try and demangle each new one
|
||
that comes in. If the demangling succeeds, then we assume it is a C++
|
||
symbol and set the symbol's language and demangled name fields
|
||
appropriately. Note that in order to avoid unnecessary demanglings, and
|
||
allocating obstack space that subsequently can't be freed for the demangled
|
||
names, we mark all newly added symbols with language_auto. After
|
||
compaction of the minimal symbols, we go back and scan the entire minimal
|
||
symbol table looking for these new symbols. For each new symbol we attempt
|
||
to demangle it, and if successful, record it as a language_cplus symbol
|
||
and cache the demangled form on the symbol obstack. Symbols which don't
|
||
demangle are marked as language_unknown symbols, which inhibits future
|
||
attempts to demangle them if we later add more minimal symbols. */
|
||
|
||
void
|
||
install_minimal_symbols (struct objfile *objfile)
|
||
{
|
||
int bindex;
|
||
int mcount;
|
||
struct msym_bunch *bunch;
|
||
struct minimal_symbol *msymbols;
|
||
int alloc_count;
|
||
|
||
if (msym_count > 0)
|
||
{
|
||
if (symtab_create_debug)
|
||
{
|
||
fprintf_unfiltered (gdb_stdlog,
|
||
"Installing %d minimal symbols of objfile %s.\n",
|
||
msym_count, objfile_name (objfile));
|
||
}
|
||
|
||
/* Allocate enough space in the obstack, into which we will gather the
|
||
bunches of new and existing minimal symbols, sort them, and then
|
||
compact out the duplicate entries. Once we have a final table,
|
||
we will give back the excess space. */
|
||
|
||
alloc_count = msym_count + objfile->minimal_symbol_count + 1;
|
||
obstack_blank (&objfile->objfile_obstack,
|
||
alloc_count * sizeof (struct minimal_symbol));
|
||
msymbols = (struct minimal_symbol *)
|
||
obstack_base (&objfile->objfile_obstack);
|
||
|
||
/* Copy in the existing minimal symbols, if there are any. */
|
||
|
||
if (objfile->minimal_symbol_count)
|
||
memcpy ((char *) msymbols, (char *) objfile->msymbols,
|
||
objfile->minimal_symbol_count * sizeof (struct minimal_symbol));
|
||
|
||
/* Walk through the list of minimal symbol bunches, adding each symbol
|
||
to the new contiguous array of symbols. Note that we start with the
|
||
current, possibly partially filled bunch (thus we use the current
|
||
msym_bunch_index for the first bunch we copy over), and thereafter
|
||
each bunch is full. */
|
||
|
||
mcount = objfile->minimal_symbol_count;
|
||
|
||
for (bunch = msym_bunch; bunch != NULL; bunch = bunch->next)
|
||
{
|
||
for (bindex = 0; bindex < msym_bunch_index; bindex++, mcount++)
|
||
msymbols[mcount] = bunch->contents[bindex];
|
||
msym_bunch_index = BUNCH_SIZE;
|
||
}
|
||
|
||
/* Sort the minimal symbols by address. */
|
||
|
||
qsort (msymbols, mcount, sizeof (struct minimal_symbol),
|
||
compare_minimal_symbols);
|
||
|
||
/* Compact out any duplicates, and free up whatever space we are
|
||
no longer using. */
|
||
|
||
mcount = compact_minimal_symbols (msymbols, mcount, objfile);
|
||
|
||
obstack_blank (&objfile->objfile_obstack,
|
||
(mcount + 1 - alloc_count) * sizeof (struct minimal_symbol));
|
||
msymbols = (struct minimal_symbol *)
|
||
obstack_finish (&objfile->objfile_obstack);
|
||
|
||
/* We also terminate the minimal symbol table with a "null symbol",
|
||
which is *not* included in the size of the table. This makes it
|
||
easier to find the end of the table when we are handed a pointer
|
||
to some symbol in the middle of it. Zero out the fields in the
|
||
"null symbol" allocated at the end of the array. Note that the
|
||
symbol count does *not* include this null symbol, which is why it
|
||
is indexed by mcount and not mcount-1. */
|
||
|
||
memset (&msymbols[mcount], 0, sizeof (struct minimal_symbol));
|
||
|
||
/* Attach the minimal symbol table to the specified objfile.
|
||
The strings themselves are also located in the objfile_obstack
|
||
of this objfile. */
|
||
|
||
objfile->minimal_symbol_count = mcount;
|
||
objfile->msymbols = msymbols;
|
||
|
||
/* Now build the hash tables; we can't do this incrementally
|
||
at an earlier point since we weren't finished with the obstack
|
||
yet. (And if the msymbol obstack gets moved, all the internal
|
||
pointers to other msymbols need to be adjusted.) */
|
||
build_minimal_symbol_hash_tables (objfile);
|
||
}
|
||
}
|
||
|
||
/* See minsyms.h. */
|
||
|
||
void
|
||
terminate_minimal_symbol_table (struct objfile *objfile)
|
||
{
|
||
if (! objfile->msymbols)
|
||
objfile->msymbols = ((struct minimal_symbol *)
|
||
obstack_alloc (&objfile->objfile_obstack,
|
||
sizeof (objfile->msymbols[0])));
|
||
|
||
{
|
||
struct minimal_symbol *m
|
||
= &objfile->msymbols[objfile->minimal_symbol_count];
|
||
|
||
memset (m, 0, sizeof (*m));
|
||
/* Don't rely on these enumeration values being 0's. */
|
||
MSYMBOL_TYPE (m) = mst_unknown;
|
||
SYMBOL_SET_LANGUAGE (m, language_unknown, &objfile->objfile_obstack);
|
||
}
|
||
}
|
||
|
||
/* Sort all the minimal symbols in OBJFILE. */
|
||
|
||
void
|
||
msymbols_sort (struct objfile *objfile)
|
||
{
|
||
qsort (objfile->msymbols, objfile->minimal_symbol_count,
|
||
sizeof (struct minimal_symbol), compare_minimal_symbols);
|
||
build_minimal_symbol_hash_tables (objfile);
|
||
}
|
||
|
||
/* Check if PC is in a shared library trampoline code stub.
|
||
Return minimal symbol for the trampoline entry or NULL if PC is not
|
||
in a trampoline code stub. */
|
||
|
||
static struct minimal_symbol *
|
||
lookup_solib_trampoline_symbol_by_pc (CORE_ADDR pc)
|
||
{
|
||
struct obj_section *section = find_pc_section (pc);
|
||
struct bound_minimal_symbol msymbol;
|
||
|
||
if (section == NULL)
|
||
return NULL;
|
||
msymbol = lookup_minimal_symbol_by_pc_section_1 (pc, section, 1);
|
||
|
||
if (msymbol.minsym != NULL
|
||
&& MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline)
|
||
return msymbol.minsym;
|
||
return NULL;
|
||
}
|
||
|
||
/* If PC is in a shared library trampoline code stub, return the
|
||
address of the `real' function belonging to the stub.
|
||
Return 0 if PC is not in a trampoline code stub or if the real
|
||
function is not found in the minimal symbol table.
|
||
|
||
We may fail to find the right function if a function with the
|
||
same name is defined in more than one shared library, but this
|
||
is considered bad programming style. We could return 0 if we find
|
||
a duplicate function in case this matters someday. */
|
||
|
||
CORE_ADDR
|
||
find_solib_trampoline_target (struct frame_info *frame, CORE_ADDR pc)
|
||
{
|
||
struct objfile *objfile;
|
||
struct minimal_symbol *msymbol;
|
||
struct minimal_symbol *tsymbol = lookup_solib_trampoline_symbol_by_pc (pc);
|
||
|
||
if (tsymbol != NULL)
|
||
{
|
||
ALL_MSYMBOLS (objfile, msymbol)
|
||
{
|
||
if ((MSYMBOL_TYPE (msymbol) == mst_text
|
||
|| MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc)
|
||
&& strcmp (SYMBOL_LINKAGE_NAME (msymbol),
|
||
SYMBOL_LINKAGE_NAME (tsymbol)) == 0)
|
||
return SYMBOL_VALUE_ADDRESS (msymbol);
|
||
|
||
/* Also handle minimal symbols pointing to function descriptors. */
|
||
if (MSYMBOL_TYPE (msymbol) == mst_data
|
||
&& strcmp (SYMBOL_LINKAGE_NAME (msymbol),
|
||
SYMBOL_LINKAGE_NAME (tsymbol)) == 0)
|
||
{
|
||
CORE_ADDR func;
|
||
|
||
func = gdbarch_convert_from_func_ptr_addr
|
||
(get_objfile_arch (objfile),
|
||
SYMBOL_VALUE_ADDRESS (msymbol),
|
||
¤t_target);
|
||
|
||
/* Ignore data symbols that are not function descriptors. */
|
||
if (func != SYMBOL_VALUE_ADDRESS (msymbol))
|
||
return func;
|
||
}
|
||
}
|
||
}
|
||
return 0;
|
||
}
|