2011-12-21 22:51:57 +01:00
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/* Minimal symbol table definitions for GDB.
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2020-01-01 07:20:01 +01:00
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Copyright (C) 2011-2020 Free Software Foundation, Inc.
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2011-12-21 22:51:57 +01:00
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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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#ifndef MINSYMS_H
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#define MINSYMS_H
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Introduce OP_VAR_MSYM_VALUE
The previous patch left GDB with an inconsistency. While with normal
expression evaluation the "unknown return type" error shows the name
of the function that misses debug info:
(gdb) p getenv ("PATH")
'getenv' has unknown return type; cast the call to its declared return type
^^^^^^
which can by handy in more complicated expressions, "ptype" does not:
(gdb) ptype getenv ("PATH")
function has unknown return type; cast the call to its declared return type
^^^^^^^^
This commit is a step toward fixing it.
The problem is that while evaluating the expression above, we have no
reference to the minimal symbol where we could extract the name from.
This is because the resulting expression tree has no reference to the
minsym at all. During parsing, the type and address of the minsym are
extracted and an UNOP_MEMVAL / UNOP_MEMVAL_TLS operator is generated
(see write_exp_elt_msym). With "set debug expression", here's what
you see:
0 OP_FUNCALL Number of args: 0
3 UNOP_MEMVAL Type @0x565334a51930 (<text variable, no debug info>)
6 OP_LONG Type @0x565334a51c60 (__CORE_ADDR), value 140737345035648 (0x7ffff7751d80)
The "print" case finds the function name, because
call_function_by_hand looks up the function by address again.
However, for "ptype", we don't reach that code, because obviously we
don't really call the function.
Unlike minsym references, references to variables with debug info have
a pointer to the variable's symbol in the expression tree, with
OP_VAR_VALUE:
(gdb) ptype main()
...
0 OP_FUNCALL Number of args: 0
3 OP_VAR_VALUE Block @0x0, symbol @0x559bbbd9b358 (main(int, char**))
...
so I don't see why do minsyms need to be different. So to prepare for
fixing the missing function name issue, this commit adds a new
OP_VAR_MSYM_VALUE operator that mimics OP_VAR_VALUE, except that it's
for minsyms instead of debug symbols. For infcalls, we now get
expressions like these:
0 OP_FUNCALL Number of args: 0
3 OP_VAR_MSYM_VALUE Objfile @0x1e41bf0, msymbol @0x7fffe599b000 (getenv)
In the following patch, we'll make OP_FUNCALL extract the function
name from the symbol stored in OP_VAR_VALUE/OP_VAR_MSYM_VALUE.
OP_VAR_MSYM_VALUE will be used more in a later patch in the series
too.
gdb/ChangeLog:
2017-09-04 Pedro Alves <palves@redhat.com>
* ada-lang.c (resolve_subexp): Handle OP_VAR_MSYM_VALUE.
* ax-gdb.c (gen_msym_var_ref): New function.
(gen_expr): Handle OP_VAR_MSYM_VALUE.
* eval.c (evaluate_var_msym_value): New function.
* eval.c (evaluate_subexp_standard): Handle OP_VAR_MSYM_VALUE.
<OP_FUNCALL>: Extract function name from symbol/minsym and pass it
to call_function_by_hand.
* expprint.c (print_subexp_standard, dump_subexp_body_standard):
Handle OP_VAR_MSYM_VALUE.
(union exp_element) <msymbol>: New field.
* minsyms.h (struct type): Forward declare.
(find_minsym_type_and_address): Declare.
* parse.c (write_exp_elt_msym): New function.
(write_exp_msymbol): Delete, refactored as ...
(find_minsym_type_and_address): ... this new function.
(write_exp_msymbol): Reimplement using OP_VAR_MSYM_VALUE.
(operator_length_standard, operator_check_standard): Handle
OP_VAR_MSYM_VALUE.
* std-operator.def (OP_VAR_MSYM_VALUE): New.
2017-09-04 21:21:13 +02:00
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struct type;
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* minsyms.h (struct bound_minimal_symbol): New.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove objfile argument.
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
* minsyms.c (lookup_minimal_symbol_by_pc_1)
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
(in_gnu_ifunc_stub): Update.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove 'objfile_p' argument.
(lookup_solib_trampoline_symbol_by_pc): Update.
* ada-tasks.c, amd64-windows-tdep.c, arm-tdep.c,
arm-wince-tdep.c, block.c, blockframe.c, breakpoint.c, btrace.c,
c-valprint.c, dwarf2loc.c, elfread.c, frame.c, frv-tdep.c,
glibc-tdep.c, gnu-v2-abi.c, gnu-v3-abi.c, hppa-hpux-tdep.c,
i386-tdep.c, ia64-tdep.c, infcall.c, infcmd.c, jit.c,
linux-fork.c, m32c-tdep.c, m68hc11-tdep.c, maint.c,
mips-tdep.c, p-valprint.c, parse.c, ppc-linux-tdep.c,
ppc-sysv-tdep.c, printcmd.c, rs6000-tdep.c, sh64-tdep.c,
stack.c, symtab.c, tui/tui-disasm.c: Update.
2013-04-08 21:59:09 +02:00
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/* Several lookup functions return both a minimal symbol and the
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objfile in which it is found. This structure is used in these
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cases. */
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struct bound_minimal_symbol
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{
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/* The minimal symbol that was found, or NULL if no minimal symbol
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was found. */
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struct minimal_symbol *minsym;
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/* If MINSYM is not NULL, then this is the objfile in which the
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symbol is defined. */
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struct objfile *objfile;
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};
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2011-12-22 03:34:34 +01:00
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/* This header declares most of the API for dealing with minimal
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symbols and minimal symbol tables. A few things are declared
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elsewhere; see below.
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2011-12-21 22:51:57 +01:00
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2011-12-22 03:34:34 +01:00
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A minimal symbol is a symbol for which there is no direct debug
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information. For example, for an ELF binary, minimal symbols are
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created from the ELF symbol table.
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For the definition of the minimal symbol structure, see struct
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minimal_symbol in symtab.h.
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Minimal symbols are stored in tables attached to an objfile; see
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objfiles.h for details. Code should generally treat these tables
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as opaque and use functions provided by minsyms.c to inspect them.
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*/
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Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
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struct msym_bunch;
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2016-09-22 21:47:48 +02:00
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/* An RAII-based object that is used to record minimal symbols while
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they are being read. */
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class minimal_symbol_reader
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{
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public:
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Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
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/* Prepare to start collecting minimal symbols. This should be
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called by a symbol reader to initialize the minimal symbol
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module. */
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2016-09-22 21:47:48 +02:00
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2016-09-22 21:57:15 +02:00
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explicit minimal_symbol_reader (struct objfile *);
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2016-09-22 21:47:48 +02:00
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~minimal_symbol_reader ();
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2011-12-22 03:34:34 +01:00
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2016-09-22 21:47:48 +02:00
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/* Install the minimal symbols that have been collected into the
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given objfile. */
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2011-12-22 03:34:34 +01:00
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2016-09-22 21:57:15 +02:00
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void install ();
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2011-12-22 03:34:34 +01:00
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Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
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/* Record a new minimal symbol. This is the "full" entry point;
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simpler convenience entry points are also provided below.
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This returns a new minimal symbol. It is ok to modify the returned
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minimal symbol (though generally not necessary). It is not ok,
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though, to stash the pointer anywhere; as minimal symbols may be
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moved after creation. The memory for the returned minimal symbol
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is still owned by the minsyms.c code, and should not be freed.
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Arguments are:
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NAME - the symbol's name
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COPY_NAME - if true, the minsym code must make a copy of NAME. If
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false, then NAME must be NUL-terminated, and must have a lifetime
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that is at least as long as OBJFILE's lifetime.
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ADDRESS - the address of the symbol
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MS_TYPE - the type of the symbol
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SECTION - the symbol's section
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2016-10-14 23:19:03 +02:00
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*/
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Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
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2019-10-13 13:57:14 +02:00
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struct minimal_symbol *record_full (gdb::string_view name,
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2016-10-14 23:19:03 +02:00
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bool copy_name,
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Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
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CORE_ADDR address,
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enum minimal_symbol_type ms_type,
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int section);
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/* Like record_full, but:
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2019-10-13 13:57:14 +02:00
|
|
|
|
- computes the length of NAME
|
2016-10-14 23:19:03 +02:00
|
|
|
|
- passes COPY_NAME = true,
|
Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
|
|
|
|
- and passes a default SECTION, depending on the type
|
|
|
|
|
|
|
|
|
|
This variant does not return the new symbol. */
|
|
|
|
|
|
2016-10-14 23:19:03 +02:00
|
|
|
|
void record (const char *name, CORE_ADDR address,
|
|
|
|
|
enum minimal_symbol_type ms_type);
|
Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
|
|
|
|
|
|
|
|
|
/* Like record_full, but:
|
2019-10-13 13:57:14 +02:00
|
|
|
|
- computes the length of NAME
|
2019-03-02 01:37:30 +01:00
|
|
|
|
- passes COPY_NAME = true.
|
Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
|
|
|
|
|
2019-03-02 01:37:30 +01:00
|
|
|
|
This variant does not return the new symbol. */
|
|
|
|
|
|
|
|
|
|
void record_with_info (const char *name, CORE_ADDR address,
|
|
|
|
|
enum minimal_symbol_type ms_type,
|
|
|
|
|
int section)
|
Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
|
|
|
|
{
|
2019-10-13 13:57:14 +02:00
|
|
|
|
record_full (name, true, address, ms_type, section);
|
Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
|
|
|
|
}
|
|
|
|
|
|
2016-09-22 21:47:48 +02:00
|
|
|
|
private:
|
|
|
|
|
|
2018-12-27 20:29:48 +01:00
|
|
|
|
DISABLE_COPY_AND_ASSIGN (minimal_symbol_reader);
|
2016-09-22 21:57:15 +02:00
|
|
|
|
|
|
|
|
|
struct objfile *m_objfile;
|
2011-12-22 03:34:34 +01:00
|
|
|
|
|
Record minimal symbols directly in reader.
This patch changes minimal symbol creation in two ways. First, it
removes global variables in favor of members of minimal_symbol_reader.
Second, it changes functions like prim_record_minimal_symbol to be
member functions of minimal_symbol_reader.
2016-10-21 Tom Tromey <tom@tromey.com>
* xcoffread.c (record_minimal_symbol, scan_xcoff_symtab): Add
"reader" argument. Update.
(xcoff_initial_scan): Update.
* symfile.h (mdebug_build_psymtabs): Add "reader" argument.
* mipsread.c (mipscoff_symfile_read): Update.
(read_alphacoff_dynamic_symtab): Add "reader" argument. Update.
* minsyms.h (minimal_symbol_reader) <record, record_full>:
Declare.
<m_msym_bunch, m_msym_bunch_index, m_msym_count>: New members.
<record_with_info>: New function, renamed from
prim_record_minimal_symbol_and_info.
* minsyms.c (msym_bunch, msym_bunch_index, msym_count): Remove
globals.
(minimal_symbol_reader): Initialize new members.
(minimal_symbol_reader::record): Renamed from
prim_record_minimal_symbol.
(minimal_symbol_reader::record_full): Renamed from
prim_record_minimal_symbol_full.
(prim_record_minimal_symbol_and_info): Move to minsyms.h; rename.
* mdebugread.c (mdebug_build_psymtabs, parse_partial_symbols)
(record_minimal_symbol): Add "reader" argument. Update.
(elfmdebug_build_psymtabs): Update.
* machoread.c (macho_symtab_add_minsym, macho_symtab_read): Add
"reader" argument. Update.
(macho_symfile_read): Update.
* elfread.c (record_minimal_symbol, elf_symtab_read)
(elf_rel_plt_read): Add "reader" argument. Update.
(elf_read_minimal_symbols): Update.
* dbxread.c (record_minimal_symbol, read_dbx_dynamic_symtab)
(read_dbx_symtab): Add "reader" argument. Update.
(dbx_symfile_read): Update.
* coffread.c (record_minimal_symbol, coff_symtab_read): Add
"reader" argument. Update.
(coff_symfile_read): Update.
* coff-pe-read.h (read_pe_exported_syms): Add "reader" argument.
* coff-pe-read.c (add_pe_exported_sym, add_pe_forwarded_sym)
(read_pe_exported_syms): Add "reader" argument. Update.
2016-09-22 22:25:08 +02:00
|
|
|
|
/* Bunch currently being filled up.
|
|
|
|
|
The next field points to chain of filled bunches. */
|
|
|
|
|
|
|
|
|
|
struct msym_bunch *m_msym_bunch;
|
|
|
|
|
|
|
|
|
|
/* Number of slots filled in current bunch. */
|
|
|
|
|
|
|
|
|
|
int m_msym_bunch_index;
|
|
|
|
|
|
|
|
|
|
/* Total number of minimal symbols recorded so far for the
|
|
|
|
|
objfile. */
|
|
|
|
|
|
|
|
|
|
int m_msym_count;
|
|
|
|
|
};
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
|
|
|
|
|
|
Fix setting-breakpoints regression on PPC64 (function descriptors)
The recent-ish commit e5f25bc5d6db ('Fix "list ambiguous_variable"')
caused a serious regression on PPC64. See
<https://sourceware.org/ml/gdb-patches/2017-11/msg00666.html>.
Basically, after that patch, GDB sets breakpoints in function
descriptors instead of where the descriptors point to, which is
incorrect.
The problem is that GDB now only runs a minsym's address through
gdbarch_convert_from_func_ptr_addr if msymbol_is_text returns true.
However, if the symbol points to a function descriptor,
msymbol_is_text is false since function descriptors are in fact
outside the text section.
The fix is to also run a non-text address through
gdbarch_convert_from_func_ptr_addr, and if that detects that it was
indeed a function descriptor, treat the resulting address as a
function.
While implementing that directly in linespec.c:minsym_found (where the
bad msymbol_is_text check is) fixes the issue, I noticed that
linespec.c:add_minsym has some code that also basically needs to do
the same checks, however it's implemented differently. Also,
add_minsym is calling find_pc_sect_line on non-function symbols, which
also doesn't look right.
So I introduced msymbol_is_function, so that we have a simple place to
consider minsyms and function descriptors.
And then, the only other use of msymbol_is_text is in
find_function_alias_target, which turns out to also be incorrect.
Changing that one to use msymbol_is_function, i.e., to consider
function descriptors too fixes (on PPC64):
-FAIL: gdb.base/symbol-alias.exp: p func_alias
-FAIL: gdb.base/symbol-alias.exp: p *func_alias()
+PASS: gdb.base/symbol-alias.exp: p func_alias
+PASS: gdb.base/symbol-alias.exp: p *func_alias()
And then after that, msymbol_is_text is no longer used anywhere, so it
can be removed.
Tested on x86_64 GNU/Linux, no regressions. Tested on PPC64 GNU/Linux
and results compared to a testrun of e5f25bc5d6db^ (before the
offending commit), also no regressions. (there's a couple new FAILs
and some new symbol name matching unit tests are crashing, but that
looks unrelated).
gdb/ChangeLog:
2017-11-29 Pedro Alves <palves@redhat.com>
* linespec.c (minsym_found, add_minsym): Use msymbol_is_function.
* minsyms.c (msymbol_is_text): Delete.
(msymbol_is_function): New function.
* minsyms.h (msymbol_is_text): Delete.
(msymbol_is_function): New declaration.
* symtab.c (find_function_alias_target): Use msymbol_is_function.
2017-11-29 20:25:58 +01:00
|
|
|
|
/* Return whether MSYMBOL is a function/method. If FUNC_ADDRESS_P is
|
|
|
|
|
non-NULL, and the MSYMBOL is a function, then *FUNC_ADDRESS_P is
|
|
|
|
|
set to the function's address, already resolved if MINSYM points to
|
|
|
|
|
a function descriptor. */
|
|
|
|
|
|
|
|
|
|
bool msymbol_is_function (struct objfile *objfile,
|
|
|
|
|
minimal_symbol *minsym,
|
|
|
|
|
CORE_ADDR *func_address_p = NULL);
|
Handle function aliases better (PR gdb/19487, errno printing)
(Ref: https://sourceware.org/ml/gdb/2017-06/msg00048.html)
This patch improves GDB support for function aliases defined with
__attribute__ alias. For example, in the test added by this commit,
there is no reference to "func_alias" in the debug info at all, only
to "func"'s definition:
$ nm ./testsuite/outputs/gdb.base/symbol-alias/symbol-alias | grep " func"
00000000004005ae t func
00000000004005ae T func_alias
$ readelf -w ./testsuite/outputs/gdb.base/symbol-alias/symbol-alias | grep func -B 1 -A 8
<1><db>: Abbrev Number: 5 (DW_TAG_subprogram)
<dc> DW_AT_name : (indirect string, offset: 0x111): func
<e0> DW_AT_decl_file : 1
<e1> DW_AT_decl_line : 27
<e2> DW_AT_prototyped : 1
<e2> DW_AT_type : <0xf8>
<e6> DW_AT_low_pc : 0x4005ae
<ee> DW_AT_high_pc : 0xb
<f6> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<f8> DW_AT_GNU_all_call_sites: 1
So all GDB knows about "func_alias" is from the minsym (elf symbol):
(gdb) p func_alias
$1 = {<text variable, no debug info>} 0x4005ae <func>
(gdb) ptype func_alias
type = int ()
(gdb) p func
$2 = {struct S *(void)} 0x4005ae <func>
(gdb) ptype func
type = struct S {
int field1;
int field2;
} *(void)
The result is that calling func_alias from the command line produces
incorrect results.
This is similar (though not exactly the same) to the glibc
errno/__errno_location/__GI___errno_location situation. On glibc,
errno is defined like this:
extern int *__errno_location (void);
#define errno (*__errno_location ())
with __GI___errno_location being an internal alias for
__errno_location. On my system's libc (F23), I do see debug info for
__errno_location, in the form of name vs linkage name:
<1><95a5>: Abbrev Number: 18 (DW_TAG_subprogram)
<95a6> DW_AT_external : 1
<95a6> DW_AT_name : (indirect string, offset: 0x2c26): __errno_location
<95aa> DW_AT_decl_file : 1
<95ab> DW_AT_decl_line : 24
<95ac> DW_AT_linkage_name: (indirect string, offset: 0x2c21): __GI___errno_location
<95b0> DW_AT_prototyped : 1
<95b0> DW_AT_type : <0x9206>
<95b4> DW_AT_low_pc : 0x20f40
<95bc> DW_AT_high_pc : 0x11
<95c4> DW_AT_frame_base : 1 byte block: 9c (DW_OP_call_frame_cfa)
<95c6> DW_AT_GNU_all_call_sites: 1
however that doesn't matter in practice, because GDB doesn't record
demangled names anyway, and so we end up with the exact same situation
covered by the testcase.
So the fix is to make the expression parser find a debug symbol for
the same address as the just-found minsym, when a lookup by name
didn't find a debug symbol by name. We now get:
(gdb) p func_alias
$1 = {struct S *(void)} 0x4005ae <func>
(gdb) p __errno_location
$2 = {int *(void)} 0x7ffff6e92830 <__errno_location>
I've made the test exercise variable aliases too, for completeness.
Those already work correctly, because unlike for function aliases, GCC
emits debug information for variable aliases.
Tested on GNU/Linux.
gdb/ChangeLog:
2017-08-21 Pedro Alves <palves@redhat.com>
PR gdb/19487
* c-exp.y (variable production): Handle function aliases.
* minsyms.c (msymbol_is_text): New function.
* minsyms.h (msymbol_is_text): Declare.
* symtab.c (find_function_alias_target): New function.
* symtab.h (find_function_alias_target): Declare.
gdb/testsuite/ChangeLog:
2017-08-21 Pedro Alves <palves@redhat.com>
PR gdb/19487
* gdb.base/symbol-alias.c: New.
* gdb.base/symbol-alias2.c: New.
* gdb.base/symbol-alias.exp: New.
2017-08-21 12:34:32 +02:00
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2019-09-30 03:15:38 +02:00
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/* Compute a hash code for the string argument. Unlike htab_hash_string,
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this is a case-insensitive hash to support "set case-sensitive off". */
|
2011-12-21 22:51:57 +01:00
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unsigned int msymbol_hash (const char *);
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2011-12-22 03:34:34 +01:00
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/* Like msymbol_hash, but compute a hash code that is compatible with
|
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strcmp_iw. */
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unsigned int msymbol_hash_iw (const char *);
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2011-12-21 22:51:57 +01:00
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/* Compute the next hash value from previous HASH and the character C. This
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is only a GDB in-memory computed value with no external files compatibility
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requirements. */
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#define SYMBOL_HASH_NEXT(hash, c) \
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2017-11-25 01:33:05 +01:00
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((hash) * 67 + TOLOWER ((unsigned char) (c)) - 113)
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2011-12-21 22:51:57 +01:00
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2011-12-22 03:34:34 +01:00
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/* Look through all the current minimal symbol tables and find the
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|
first minimal symbol that matches NAME. If OBJF is non-NULL, limit
|
use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
|
|
|
|
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 bound minimal symbol that
|
|
|
|
|
matches, or an empty bound minimal symbol if no match is found. */
|
2011-12-22 03:34:34 +01:00
|
|
|
|
|
use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
|
|
|
|
struct bound_minimal_symbol lookup_minimal_symbol (const char *,
|
|
|
|
|
const char *,
|
|
|
|
|
struct objfile *);
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
|
|
|
|
/* Like lookup_minimal_symbol, but searches all files and
|
|
|
|
|
objfiles. */
|
2013-08-05 17:51:02 +02:00
|
|
|
|
|
|
|
|
|
struct bound_minimal_symbol lookup_bound_minimal_symbol (const char *);
|
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
/* Look through all the current minimal symbol tables and find the
|
|
|
|
|
first minimal symbol that matches NAME and has text type. If OBJF
|
use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
|
|
|
|
is non-NULL, limit the search to that objfile. Returns a bound
|
|
|
|
|
minimal symbol that matches, or an "empty" bound minimal symbol
|
|
|
|
|
otherwise.
|
2011-12-22 03:34:34 +01:00
|
|
|
|
|
|
|
|
|
This function only searches the mangled (linkage) names. */
|
|
|
|
|
|
use bound_minsym as result for lookup_minimal_symbol et al
This patch changes a few minimal symbol lookup functions to return a
bound_minimal_symbol rather than a pointer to the minsym. This change
helps prepare gdb for computing a minimal symbol's address at the
point of use.
Note that this changes even those functions that ostensibly search a
single objfile. That was necessary because, in fact, those functions
can search an objfile and its separate debug objfiles; and it is
important for the caller to know in which objfile the minimal symbol
was actually found.
The bulk of this patch is mechanical.
2014-02-26 Tom Tromey <tromey@redhat.com>
* ada-lang.c (ada_update_initial_language): Update.
(ada_main_name, ada_has_this_exception_support): Update.
* ada-tasks.c (ada_tasks_inferior_data_sniffer): Update.
* aix-thread.c (pdc_symbol_addrs, pd_enable): Update.
* arm-tdep.c (arm_skip_stub): Update.
* auxv.c (ld_so_xfer_auxv): Update.
* avr-tdep.c (avr_scan_prologue): Update.
* ax-gdb.c (gen_var_ref): Update.
* breakpoint.c (struct breakpoint_objfile_data)
<overlay_msym, longjmp_msym, terminate_msym, exception_msym>: Change
type to bound_minimal_symbol.
(create_overlay_event_breakpoint)
(create_longjmp_master_breakpoint)
(create_std_terminate_master_breakpoint)
(create_exception_master_breakpoint): Update.
* bsd-uthread.c (bsd_uthread_lookup_address): Update.
* c-exp.y (classify_name): Update.
* coffread.c (coff_symfile_read): Update.
* common/agent.c (agent_look_up_symbols): Update.
* d-lang.c (d_main_name): Update.
* dbxread.c (find_stab_function_addr, end_psymtab): Update.
* dec-thread.c (enable_dec_thread): Update.
* dwarf2loc.c (call_site_to_target_addr): Update.
* elfread.c (elf_gnu_ifunc_resolve_by_got): Update.
* eval.c (evaluate_subexp_standard): Update.
* findvar.c (struct minsym_lookup_data) <result>: Change type
to bound_minimal_symbol.
<objfile>: Remove.
(minsym_lookup_iterator_cb, default_read_var_value): Update.
* frame.c (inside_main_func): Update.
* frv-tdep.c (frv_frame_this_id): Update.
* gcore.c (call_target_sbrk): Update.
* glibc-tdep.c (glibc_skip_solib_resolver): Update.
* gnu-v3-abi.c (gnuv3_get_typeid, gnuv3_skip_trampoline):
Update.
* go-lang.c (go_main_name): Update.
* hppa-hpux-tdep.c (hppa_hpux_skip_trampoline_code)
(hppa_hpux_find_import_stub_for_addr): Update.
* hppa-tdep.c (hppa_extract_17, hppa_lookup_stub_minimal_symbol):
Update. Change return type.
* hppa-tdep.h (hppa_lookup_stub_minimal_symbol): Change return
type.
* jit.c (jit_breakpoint_re_set_internal): Update.
* linux-fork.c (inferior_call_waitpid, checkpoint_command):
Update.
* linux-nat.c (get_signo): Update.
* linux-thread-db.c (inferior_has_bug): Update
* m32c-tdep.c (m32c_return_value)
(m32c_m16c_address_to_pointer): Update.
* m32r-tdep.c (m32r_frame_this_id): Update.
* m68hc11-tdep.c (m68hc11_get_register_info): Update.
* machoread.c (macho_resolve_oso_sym_with_minsym): Update.
* minsyms.c (lookup_minimal_symbol_internal): Rename to
lookup_minimal_symbol. Change return type.
(lookup_minimal_symbol): Remove.
(lookup_bound_minimal_symbol): Update.
(lookup_minimal_symbol_text): Change return type.
(lookup_minimal_symbol_solib_trampoline): Change return type.
* minsyms.h (lookup_minimal_symbol, lookup_minimal_symbol_text)
(lookup_minimal_symbol_solib_trampoline): Change return type.
* mips-linux-tdep.c (mips_linux_skip_resolver): Update.
* objc-lang.c (lookup_objc_class, lookup_child_selector)
(value_nsstring, find_imps): Update.
* obsd-tdep.c (obsd_skip_solib_resolver): Update.
* p-lang.c (pascal_main_name): Update.
* ppc-linux-tdep.c (ppc_linux_spe_context_lookup): Update.
* ppc-sysv-tdep.c (convert_code_addr_to_desc_addr): Update.
* proc-service.c (ps_pglobal_lookup): Update.
* ravenscar-thread.c (get_running_thread_msymbol): Change
return type.
(has_ravenscar_runtime, get_running_thread_id): Update.
* remote.c (remote_check_symbols): Update.
* sol-thread.c (ps_pglobal_lookup): Update.
* sol2-tdep.c (sol2_skip_solib_resolver): Update.
* solib-dsbt.c (lm_base): Update.
* solib-frv.c (lm_base, frv_relocate_section_addresses):
Update.
* solib-irix.c (locate_base): Update.
* solib-som.c (som_solib_create_inferior_hook)
(som_solib_desire_dynamic_linker_symbols, link_map_start):
Update.
* solib-spu.c (spu_enable_break): Update.
* solib-svr4.c (elf_locate_base, enable_break): Update.
* spu-tdep.c (spu_get_overlay_table, spu_catch_start)
(flush_ea_cache): Update.
* stabsread.c (define_symbol): Update.
* symfile.c (simple_read_overlay_table): Update.
* symtab.c (find_pc_sect_line): Update.
* tracepoint.c (scope_info): Update.
* tui-disasm.c (tui_get_begin_asm_address): Update.
* value.c (value_static_field): Update.
2013-10-15 03:53:29 +02:00
|
|
|
|
struct bound_minimal_symbol lookup_minimal_symbol_text (const char *,
|
|
|
|
|
struct objfile *);
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
Handle copy relocations
In ELF, if a data symbol is defined in a shared library and used by
the main program, it will be subject to a "copy relocation". In this
scenario, the main program has a copy of the symbol in question, and a
relocation that tells ld.so to copy the data from the shared library.
Then the symbol in the main program is used to satisfy all references.
This patch changes gdb to handle this scenario. Data symbols coming
from ELF shared libraries get a special flag that indicates that the
symbol's address may be subject to copy relocation.
I looked briefly into handling copy relocations by looking at the
actual relocations in the main program, but this seemed difficult to
do with BFD.
Note that no caching is done here. Perhaps this could be changed if
need be; I wanted to avoid possible problems with either objfile
lifetimes and changes, or conflicts with the long-term (vapor-ware)
objfile splitting project.
gdb/ChangeLog
2019-10-02 Tom Tromey <tromey@adacore.com>
* symmisc.c (dump_msymbols): Don't use MSYMBOL_VALUE_ADDRESS.
* ada-lang.c (lesseq_defined_than): Handle
LOC_STATIC.
* dwarf2read.c (dwarf2_per_objfile): Add can_copy
parameter.
(dwarf2_has_info): Likewise.
(new_symbol): Set maybe_copied on symbol when
appropriate.
* dwarf2read.h (dwarf2_per_objfile): Add can_copy
parameter.
<can_copy>: New member.
* elfread.c (record_minimal_symbol): Set maybe_copied
on symbol when appropriate.
(elf_symfile_read): Update call to dwarf2_has_info.
* minsyms.c (lookup_minimal_symbol_linkage): New
function.
* minsyms.h (lookup_minimal_symbol_linkage): Declare.
* symtab.c (get_symbol_address, get_msymbol_address):
New functions.
* symtab.h (get_symbol_address, get_msymbol_address):
Declare.
(SYMBOL_VALUE_ADDRESS, MSYMBOL_VALUE_ADDRESS): Handle
maybe_copied.
(struct symbol, struct minimal_symbol) <maybe_copied>:
New member.
2019-06-25 20:50:45 +02:00
|
|
|
|
/* Look through the minimal symbols in OBJF (and its separate debug
|
|
|
|
|
objfiles) for a global (not file-local) minsym whose linkage name
|
|
|
|
|
is NAME. This is somewhat similar to lookup_minimal_symbol_text,
|
|
|
|
|
only data symbols (not text symbols) are considered, and a non-NULL
|
|
|
|
|
objfile is not accepted. Returns a bound minimal symbol that
|
|
|
|
|
matches, or an "empty" bound minimal symbol otherwise. */
|
|
|
|
|
|
|
|
|
|
extern struct bound_minimal_symbol lookup_minimal_symbol_linkage
|
|
|
|
|
(const char *name, struct objfile *objf)
|
|
|
|
|
ATTRIBUTE_NONNULL (1) ATTRIBUTE_NONNULL (2);
|
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
/* Look through all the current minimal symbol tables and find the
|
|
|
|
|
first minimal symbol that matches NAME and PC. If OBJF is non-NULL,
|
|
|
|
|
limit the search to that objfile. Returns a pointer to the minimal
|
|
|
|
|
symbol that matches, or NULL if no match is found. */
|
|
|
|
|
|
2011-12-21 22:51:57 +01:00
|
|
|
|
struct minimal_symbol *lookup_minimal_symbol_by_pc_name
|
2011-12-22 03:34:34 +01:00
|
|
|
|
(CORE_ADDR, const char *, struct objfile *);
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2018-04-26 14:01:27 +02:00
|
|
|
|
enum class lookup_msym_prefer
|
|
|
|
|
{
|
|
|
|
|
/* Prefer mst_text symbols. */
|
|
|
|
|
TEXT,
|
|
|
|
|
|
|
|
|
|
/* Prefer mst_solib_trampoline symbols when there are text and
|
|
|
|
|
trampoline symbols at the same address. Otherwise prefer
|
|
|
|
|
mst_text symbols. */
|
|
|
|
|
TRAMPOLINE,
|
|
|
|
|
|
|
|
|
|
/* Prefer mst_text_gnu_ifunc symbols when there are text and ifunc
|
|
|
|
|
symbols at the same address. Otherwise prefer mst_text
|
|
|
|
|
symbols. */
|
|
|
|
|
GNU_IFUNC,
|
|
|
|
|
};
|
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
/* 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 which matches SECTION.
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
If SECTION is NULL, this uses the result of find_pc_section
|
|
|
|
|
instead.
|
|
|
|
|
|
* minsyms.h (struct bound_minimal_symbol): New.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove objfile argument.
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
* minsyms.c (lookup_minimal_symbol_by_pc_1)
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
(in_gnu_ifunc_stub): Update.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove 'objfile_p' argument.
(lookup_solib_trampoline_symbol_by_pc): Update.
* ada-tasks.c, amd64-windows-tdep.c, arm-tdep.c,
arm-wince-tdep.c, block.c, blockframe.c, breakpoint.c, btrace.c,
c-valprint.c, dwarf2loc.c, elfread.c, frame.c, frv-tdep.c,
glibc-tdep.c, gnu-v2-abi.c, gnu-v3-abi.c, hppa-hpux-tdep.c,
i386-tdep.c, ia64-tdep.c, infcall.c, infcmd.c, jit.c,
linux-fork.c, m32c-tdep.c, m68hc11-tdep.c, maint.c,
mips-tdep.c, p-valprint.c, parse.c, ppc-linux-tdep.c,
ppc-sysv-tdep.c, printcmd.c, rs6000-tdep.c, sh64-tdep.c,
stack.c, symtab.c, tui/tui-disasm.c: Update.
2013-04-08 21:59:09 +02:00
|
|
|
|
The result has a non-NULL 'minsym' member if such a symbol is
|
2018-04-26 14:01:27 +02:00
|
|
|
|
found, or NULL if PC is not in a suitable range.
|
|
|
|
|
|
|
|
|
|
See definition of lookup_msym_prefer for description of PREFER. By
|
|
|
|
|
default mst_text symbols are preferred. */
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
* minsyms.h (struct bound_minimal_symbol): New.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove objfile argument.
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
* minsyms.c (lookup_minimal_symbol_by_pc_1)
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
(in_gnu_ifunc_stub): Update.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove 'objfile_p' argument.
(lookup_solib_trampoline_symbol_by_pc): Update.
* ada-tasks.c, amd64-windows-tdep.c, arm-tdep.c,
arm-wince-tdep.c, block.c, blockframe.c, breakpoint.c, btrace.c,
c-valprint.c, dwarf2loc.c, elfread.c, frame.c, frv-tdep.c,
glibc-tdep.c, gnu-v2-abi.c, gnu-v3-abi.c, hppa-hpux-tdep.c,
i386-tdep.c, ia64-tdep.c, infcall.c, infcmd.c, jit.c,
linux-fork.c, m32c-tdep.c, m68hc11-tdep.c, maint.c,
mips-tdep.c, p-valprint.c, parse.c, ppc-linux-tdep.c,
ppc-sysv-tdep.c, printcmd.c, rs6000-tdep.c, sh64-tdep.c,
stack.c, symtab.c, tui/tui-disasm.c: Update.
2013-04-08 21:59:09 +02:00
|
|
|
|
struct bound_minimal_symbol lookup_minimal_symbol_by_pc_section
|
2018-04-26 14:01:27 +02:00
|
|
|
|
(CORE_ADDR,
|
|
|
|
|
struct obj_section *,
|
|
|
|
|
lookup_msym_prefer prefer = lookup_msym_prefer::TEXT);
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
/* Backward compatibility: search through the minimal symbol table
|
|
|
|
|
for a matching PC (no section given).
|
|
|
|
|
|
|
|
|
|
This is a wrapper that calls lookup_minimal_symbol_by_pc_section
|
|
|
|
|
with a NULL section argument. */
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
* minsyms.h (struct bound_minimal_symbol): New.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove objfile argument.
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
* minsyms.c (lookup_minimal_symbol_by_pc_1)
(lookup_minimal_symbol_by_pc_section, lookup_minimal_symbol_by_pc):
Return bound_minimal_symbol.
(in_gnu_ifunc_stub): Update.
(lookup_minimal_symbol_and_objfile): Return bound_minimal_symbol.
Remove 'objfile_p' argument.
(lookup_solib_trampoline_symbol_by_pc): Update.
* ada-tasks.c, amd64-windows-tdep.c, arm-tdep.c,
arm-wince-tdep.c, block.c, blockframe.c, breakpoint.c, btrace.c,
c-valprint.c, dwarf2loc.c, elfread.c, frame.c, frv-tdep.c,
glibc-tdep.c, gnu-v2-abi.c, gnu-v3-abi.c, hppa-hpux-tdep.c,
i386-tdep.c, ia64-tdep.c, infcall.c, infcmd.c, jit.c,
linux-fork.c, m32c-tdep.c, m68hc11-tdep.c, maint.c,
mips-tdep.c, p-valprint.c, parse.c, ppc-linux-tdep.c,
ppc-sysv-tdep.c, printcmd.c, rs6000-tdep.c, sh64-tdep.c,
stack.c, symtab.c, tui/tui-disasm.c: Update.
2013-04-08 21:59:09 +02:00
|
|
|
|
struct bound_minimal_symbol lookup_minimal_symbol_by_pc (CORE_ADDR);
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2011-12-22 03:34:34 +01:00
|
|
|
|
/* Iterate over all the minimal symbols in the objfile OBJF which
|
|
|
|
|
match NAME. Both the ordinary and demangled names of each symbol
|
|
|
|
|
are considered. The caller is responsible for canonicalizing NAME,
|
|
|
|
|
should that need to be done.
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2018-03-31 18:32:00 +02:00
|
|
|
|
For each matching symbol, CALLBACK is called with the symbol. */
|
|
|
|
|
|
|
|
|
|
void iterate_over_minimal_symbols
|
|
|
|
|
(struct objfile *objf, const lookup_name_info &name,
|
Calling ifunc functions when resolver has debug info, user symbol same name
If the GNU ifunc resolver has the same name as the user visible
symbol, and the resolver has debug info, then the DWARF info for the
resolver masks the ifunc minsym. In that scenario, if you try calling
the ifunc from GDB, you call the resolver instead. With the
gnu-ifunc.exp testcase added in a following patch, you'd see:
(gdb) p gnu_ifunc (3)
$1 = (int (*)(int)) 0x400753 <final>
(gdb) FAIL: gdb.base/gnu-ifunc.exp: resolver_attr=0: resolver_debug=1: resolved_debug=0: p gnu_ifunc (3)
^^^^^^^^^^^^^^^^
That is, we called the ifunc resolver manually, which returned a
pointer to the ifunc target function ("final"). The "final" symbol is
the function that GDB should have called automatically,
~~~~~~~~~~~~
int
final (int arg)
{
return arg + 1;
}
~~~~~~~~~
which is what happens if you don't have debug info for the resolver:
(gdb) p gnu_ifunc (3)
$1 = 4
(gdb) PASS: gdb.base/gnu-ifunc.exp: resolver_attr=0: resolver_debug=0: resolved_debug=1: p gnu_ifunc (3)
^^^^^^^^^^^^^^^^
or if the resolver's symbol has a different name from the ifunc (as is
the case with modern uses of ifunc via __attribute__ ifunc, such as
glibc uses):
(gdb) p gnu_ifunc (3)
$1 = 4
(gdb) PASS: gdb.base/gnu-ifunc.exp: resolver_attr=1: resolver_debug=1: resolved_debug=0: p gnu_ifunc (3)
^^^^^^^^^^^^^^^
in which case after this patch, you can still call the resolver
directly if you want:
(gdb) p gnu_ifunc_resolver (3)
$1 = (int (*)(int)) 0x400753 <final>
gdb/ChangeLog:
2018-04-26 Pedro Alves <palves@redhat.com>
* c-exp.y (variable production): Prefer ifunc minsyms over
regular function symbols.
* symtab.c (find_gnu_ifunc): New function.
* minsyms.h (lookup_msym_prefer): New enum.
(lookup_minimal_symbol_by_pc_section): Replace 'want_trampoline'
parameter by a lookup_msym_prefer parameter.
* symtab.h (find_gnu_ifunc): New declaration.
2018-04-26 14:01:26 +02:00
|
|
|
|
gdb::function_view<bool (struct minimal_symbol *)> callback);
|
2011-12-21 22:51:57 +01:00
|
|
|
|
|
2013-08-19 15:58:44 +02:00
|
|
|
|
/* Compute the upper bound of MINSYM. The upper bound is the last
|
|
|
|
|
address thought to be part of the symbol. If the symbol has a
|
|
|
|
|
size, it is used. Otherwise use the lesser of the next minimal
|
|
|
|
|
symbol in the same section, or the end of the section, as the end
|
|
|
|
|
of the function. */
|
|
|
|
|
|
|
|
|
|
CORE_ADDR minimal_symbol_upper_bound (struct bound_minimal_symbol minsym);
|
|
|
|
|
|
Introduce OP_VAR_MSYM_VALUE
The previous patch left GDB with an inconsistency. While with normal
expression evaluation the "unknown return type" error shows the name
of the function that misses debug info:
(gdb) p getenv ("PATH")
'getenv' has unknown return type; cast the call to its declared return type
^^^^^^
which can by handy in more complicated expressions, "ptype" does not:
(gdb) ptype getenv ("PATH")
function has unknown return type; cast the call to its declared return type
^^^^^^^^
This commit is a step toward fixing it.
The problem is that while evaluating the expression above, we have no
reference to the minimal symbol where we could extract the name from.
This is because the resulting expression tree has no reference to the
minsym at all. During parsing, the type and address of the minsym are
extracted and an UNOP_MEMVAL / UNOP_MEMVAL_TLS operator is generated
(see write_exp_elt_msym). With "set debug expression", here's what
you see:
0 OP_FUNCALL Number of args: 0
3 UNOP_MEMVAL Type @0x565334a51930 (<text variable, no debug info>)
6 OP_LONG Type @0x565334a51c60 (__CORE_ADDR), value 140737345035648 (0x7ffff7751d80)
The "print" case finds the function name, because
call_function_by_hand looks up the function by address again.
However, for "ptype", we don't reach that code, because obviously we
don't really call the function.
Unlike minsym references, references to variables with debug info have
a pointer to the variable's symbol in the expression tree, with
OP_VAR_VALUE:
(gdb) ptype main()
...
0 OP_FUNCALL Number of args: 0
3 OP_VAR_VALUE Block @0x0, symbol @0x559bbbd9b358 (main(int, char**))
...
so I don't see why do minsyms need to be different. So to prepare for
fixing the missing function name issue, this commit adds a new
OP_VAR_MSYM_VALUE operator that mimics OP_VAR_VALUE, except that it's
for minsyms instead of debug symbols. For infcalls, we now get
expressions like these:
0 OP_FUNCALL Number of args: 0
3 OP_VAR_MSYM_VALUE Objfile @0x1e41bf0, msymbol @0x7fffe599b000 (getenv)
In the following patch, we'll make OP_FUNCALL extract the function
name from the symbol stored in OP_VAR_VALUE/OP_VAR_MSYM_VALUE.
OP_VAR_MSYM_VALUE will be used more in a later patch in the series
too.
gdb/ChangeLog:
2017-09-04 Pedro Alves <palves@redhat.com>
* ada-lang.c (resolve_subexp): Handle OP_VAR_MSYM_VALUE.
* ax-gdb.c (gen_msym_var_ref): New function.
(gen_expr): Handle OP_VAR_MSYM_VALUE.
* eval.c (evaluate_var_msym_value): New function.
* eval.c (evaluate_subexp_standard): Handle OP_VAR_MSYM_VALUE.
<OP_FUNCALL>: Extract function name from symbol/minsym and pass it
to call_function_by_hand.
* expprint.c (print_subexp_standard, dump_subexp_body_standard):
Handle OP_VAR_MSYM_VALUE.
(union exp_element) <msymbol>: New field.
* minsyms.h (struct type): Forward declare.
(find_minsym_type_and_address): Declare.
* parse.c (write_exp_elt_msym): New function.
(write_exp_msymbol): Delete, refactored as ...
(find_minsym_type_and_address): ... this new function.
(write_exp_msymbol): Reimplement using OP_VAR_MSYM_VALUE.
(operator_length_standard, operator_check_standard): Handle
OP_VAR_MSYM_VALUE.
* std-operator.def (OP_VAR_MSYM_VALUE): New.
2017-09-04 21:21:13 +02:00
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/* Return the type of MSYMBOL, a minimal symbol of OBJFILE. If
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ADDRESS_P is not NULL, set it to the MSYMBOL's resolved
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address. */
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type *find_minsym_type_and_address (minimal_symbol *msymbol, objfile *objf,
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CORE_ADDR *address_p);
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2011-12-21 22:51:57 +01:00
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#endif /* MINSYMS_H */
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