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0d12e84cfc
I touched symtab.h and was surprised to see how many files were rebuilt. I looked into it a bit, and found that defs.h includes gdbarch.h, which in turn includes many things. gdbarch.h is only needed by a minority ofthe files in gdb, so this patch removes the include from defs.h and updates the fallout. I did "wc -l" on the files in build/gdb/.deps; this patch reduces the line count from 139935 to 137030; so there are definitely future build-time savings here. Note that while I configured with --enable-targets=all, it's possible that some *-nat.c file needs an update. I could not test all of these. The buildbot caught a few problems along these lines. gdb/ChangeLog 2019-07-10 Tom Tromey <tom@tromey.com> * defs.h: Don't include gdbarch.h. * aarch64-ravenscar-thread.c, aarch64-tdep.c, alpha-bsd-tdep.h, alpha-linux-tdep.c, alpha-mdebug-tdep.c, arch-utils.h, arm-tdep.h, ax-general.c, btrace.c, buildsym-legacy.c, buildsym.h, c-lang.c, cli/cli-decode.h, cli/cli-dump.c, cli/cli-script.h, cli/cli-style.h, coff-pe-read.h, compile/compile-c-support.c, compile/compile-cplus.h, compile/compile-loc2c.c, corefile.c, cp-valprint.c, cris-linux-tdep.c, ctf.c, d-lang.c, d-namespace.c, dcache.c, dicos-tdep.c, dictionary.c, disasm-selftests.c, dummy-frame.c, dummy-frame.h, dwarf2-frame-tailcall.c, dwarf2expr.c, expression.h, f-lang.c, frame-base.c, frame-unwind.c, frv-linux-tdep.c, gdbarch-selftests.c, gdbtypes.h, go-lang.c, hppa-nbsd-tdep.c, hppa-obsd-tdep.c, i386-dicos-tdep.c, i386-tdep.h, ia64-vms-tdep.c, interps.h, language.c, linux-record.c, location.h, m2-lang.c, m32r-linux-tdep.c, mem-break.c, memattr.c, mn10300-linux-tdep.c, nios2-linux-tdep.c, objfiles.h, opencl-lang.c, or1k-linux-tdep.c, p-lang.c, parser-defs.h, ppc-tdep.h, probe.h, python/py-record-btrace.c, record-btrace.c, record.h, regcache-dump.c, regcache.h, riscv-fbsd-tdep.c, riscv-linux-tdep.c, rust-exp.y, sh-linux-tdep.c, sh-nbsd-tdep.c, source-cache.c, sparc-nbsd-tdep.c, sparc-obsd-tdep.c, sparc-ravenscar-thread.c, sparc64-fbsd-tdep.c, std-regs.c, target-descriptions.h, target-float.c, tic6x-linux-tdep.c, tilegx-linux-tdep.c, top.c, tracefile.c, trad-frame.c, type-stack.h, ui-style.c, utils.c, utils.h, valarith.c, valprint.c, varobj.c, x86-tdep.c, xml-support.h, xtensa-linux-tdep.c, cli/cli-cmds.h: Update. * s390-linux-nat.c, procfs.c, inf-ptrace.c: Likewise.
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* Target-dependent code for X86-based targets.
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Copyright (C) 2018-2019 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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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#include "defs.h"
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#include "x86-tdep.h"
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#include "symtab.h"
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/* Check whether NAME is included in NAMES[LO] (inclusive) to NAMES[HI]
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(exclusive). */
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static bool
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x86_is_thunk_register_name (const char *name, const char **names, int lo,
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int hi)
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{
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int reg;
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for (reg = lo; reg < hi; ++reg)
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if (strcmp (name, names[reg]) == 0)
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return true;
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return false;
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}
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/* See x86-tdep.h. */
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bool
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x86_in_indirect_branch_thunk (CORE_ADDR pc, const char **register_names,
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int lo, int hi)
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{
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struct bound_minimal_symbol bmfun = lookup_minimal_symbol_by_pc (pc);
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if (bmfun.minsym == nullptr)
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return false;
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const char *name = MSYMBOL_LINKAGE_NAME (bmfun.minsym);
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if (name == nullptr)
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return false;
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/* Check the indirect return thunk first. */
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if (strcmp (name, "__x86_return_thunk") == 0)
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return true;
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/* Then check a family of indirect call/jump thunks. */
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static const char thunk[] = "__x86_indirect_thunk";
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static const size_t length = sizeof (thunk) - 1;
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if (strncmp (name, thunk, length) != 0)
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return false;
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/* If that's the complete name, we're in the memory thunk. */
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name += length;
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if (*name == '\0')
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return true;
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/* Check for suffixes. */
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if (*name++ != '_')
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return false;
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if (x86_is_thunk_register_name (name, register_names, lo, hi))
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return true;
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return false;
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}
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