f01dcfd9a7
Some of the source code for the test cases in the GDB testsuite
reside in .S files containing assembly code. These files typically
define a symbol - such as main - which may, depending on the target,
require a prefix such as underscore.
For example, gdb.dwarf2/dw-compdir-oldgcc.S defines the symbol main:
main: .globl main
Some targets, such as rx-elf, require main to have an underscore
prefix. (If it doesn't, a linker error results due to not being able
to find _main required by crt0.o.) So, instead, the above should look
like this for rx-elf and other targets with this same requirement:
_main: .globl _main
This patch defines a new tcl proc in lib/gdb named
gdb_target_symbol_prefix_flags_asm. This proc returns a string
which will - assuming everything else is wired up correctly - cause
-DSYMBOL_PREFIX=_ to be passed on the command line to the compiler.
The test cases are augmented with a macro definition for SYMBOL
as follows:
#define CONCAT1(a, b) CONCAT2(a, b)
#define CONCAT2(a, b) a ## b
#ifdef SYMBOL_PREFIX
# define SYMBOL(str) CONCAT1(SYMBOL_PREFIX, str)
#else
# define SYMBOL(str) str
#endif
Symbols, such as main shown in the example earlier are then wrapped
with SYMBOL like this:
SYMBOL(main): .globl SYMBOL(main)
The net effect will be to add a prefix for those targets which need
it and add no prefix for those targets which do not.
It should be noted that there was already a proc in lib/gdb.exp
called gdb_target_symbol_prefix_flags. It still exists, but has
been significantly rewritten. (There is only one small difference
between the two versions.)
That proc used to explicitly list targets which were known to
require an underscore prefix. This is no longer done; the recently
added proc, gdb_target_symbol_prefix, is now invoked to dynamically
discover whether or not a prefix is required for that particular
target.
The difference between gdb_target_symbol_prefix_flags_asm
and gdb_target_symbol_prefix_flags is that the former returns
a bare prefix while the latter returns the prefix enclosed in
double quotes. I.e. assuming that the discovered prefix is
underscore, gdb_target_symbol_prefix_flags_asm returns:
additional_flags=-DSYMBOL_PREFIX=_
while gdb_target_symbol_prefix_flags returns:
additional_flags=-DSYMBOL_PREFIX="_"
The double-quoted version is not suitable for using with .S files
containing assembly code; there is no way to strip the double quotes
using C preprocessor constructs.
It would be possible to use the bare (non double quoted) version in
C source code. However, the supporting macros become more complicated
and therefore more difficult to maintain.
gdb/testsuite/ChangeLog:
* lib/gdb (gdb_target_symbol_prefix_flags_asm): New proc.
(gdb_target_symbol_prefix_flags): Define in terms of _asm
version.
* gdb.arch/i386-float.exp, gdb.arch/i386-permbkpt.exp,
gdb.dwarf2/dw2-canonicalize-type.exp,
gdb.dwarf2/dw2-compdir-oldgcc.exp, gdb.dwarf2/dw2-minsym-in-cu.exp,
gdb.dwarf2/dw2-op-stack-value.exp, gdb.dwarf2/dw2-unresolved.exp,
gdb.dwarf2/fission-reread.exp, gdb.dwarf2/pr13961.exp: Use flags
provided by gdb_target_symbol_prefix_flags_asm.
* gdb.dwarf2/dw2-canonicalize-type.S, gdb.dwarf2/dw2-compdir-oldgcc.S,
testsuite/gdb.dwarf2/dw2-minsym-in-cu.S,
testsuite/gdb.dwarf2/dw2-unresolved-main.c,
testsuite/gdb.dwarf2/dw2-unresolved.S, gdb.dwarf2/fission-reread.S,
gdb.dwarf2/pr13961.S: Define and use SYMBOL macro (and supporting
macros where needed). Use this macro for symbols which require
the prefix provided by SYMBOL_PREFIX.
370 lines
11 KiB
ArmAsm
370 lines
11 KiB
ArmAsm
/* Copyright 2012-2015 Free Software Foundation, Inc.
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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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/* Testcase to exercise the code path in bug 13961.
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Compiled from:
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class foo
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{
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public:
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int bar;
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};
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foo baz;
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int
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main ()
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{
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return 0;
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}
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And then manually edited to insert the necessary DW_AT_specification
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entries to trigger the desired code path.
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There's no real need to make this architecture-specific, so it has been
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further hand-edited to support that.
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*/
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#define CONCAT1(a, b) CONCAT2(a, b)
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#define CONCAT2(a, b) a ## b
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#ifdef SYMBOL_PREFIX
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# define SYMBOL(str) CONCAT1(SYMBOL_PREFIX, str)
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#else
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# define SYMBOL(str) str
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#endif
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.file "pr13961.cc"
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.globl baz
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.data /* Previously this used .bss, but it's not portable. */
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.align 4
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.type baz, %object
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.size baz, 4
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baz:
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#if 0
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/* This is disabled because when it was accidentally left out it
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caused a segv when used with .gdb_index. */
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.file 1 "foo.c"
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.loc 1 12 0
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#endif
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.zero 4
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.text
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.Ltext0:
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.globl SYMBOL(main)
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.type SYMBOL(main), %function
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SYMBOL(main):
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.LFB0:
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.4byte 0
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.LFE0:
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.size SYMBOL(main), .-SYMBOL(main)
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.Letext0:
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.section .debug_types,"",%progbits
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.Ldebug_types0:
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.4byte .Ltu_end - .Ltu_start /* Length of Compilation Unit Info */
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.Ltu_start:
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.2byte 0x4 /* DWARF version number */
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.4byte .Ldebug_abbrev0 /* Offset Into Abbrev. Section */
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.byte 0x4 /* Pointer Size (in bytes) */
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.byte 0x19 /* Type Signature */
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.byte 0x8b
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.byte 0x7e
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.byte 0xac
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.byte 0xce
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.byte 0xf1
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.byte 0x22
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.byte 0x90
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.4byte .Ltu_class_type - .Ldebug_types0 /* Offset to Type DIE */
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.uleb128 0x1 /* (DIE (0x17) DW_TAG_type_unit) */
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.byte 0x4 /* DW_AT_language */
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.byte 0x73 /* DW_AT_GNU_odr_signature */
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.byte 0xea
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.byte 0x85
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.byte 0x23
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.byte 0x75
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.byte 0x8a
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.byte 0x7e
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.byte 0x87
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.4byte .Ldebug_line0 /* DW_AT_stmt_list */
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/* Manually inserted to have a DW_AT_specification refering to
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something and appearing ahead of it. */
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.uleb128 0x8 /* DW_TAG_class_type */
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.4byte .Ltu_class_type - .Ldebug_types0
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/* End of manual insertion */
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.Ltu_class_type:
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.uleb128 0x2 /* (DIE (0x25) DW_TAG_class_type) */
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.ascii "foo\0" /* DW_AT_name */
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.byte 0x4 /* DW_AT_byte_size */
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.byte 0x1 /* DW_AT_decl_file (pr13961.cc) */
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.byte 0x1 /* DW_AT_decl_line */
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.4byte 0x3f /* DW_AT_sibling */
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.uleb128 0x3 /* (DIE (0x31) DW_TAG_member) */
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.ascii "bar\0" /* DW_AT_name */
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.byte 0x1 /* DW_AT_decl_file (pr13961.cc) */
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.byte 0x4 /* DW_AT_decl_line */
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.4byte 0x3f /* DW_AT_type */
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.byte 0 /* DW_AT_data_member_location */
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.byte 0x1 /* DW_AT_accessibility */
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.byte 0 /* end of children of DIE 0x25 */
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.uleb128 0x4 /* (DIE (0x3f) DW_TAG_base_type) */
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.byte 0x4 /* DW_AT_byte_size */
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.byte 0x5 /* DW_AT_encoding */
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.ascii "int\0" /* DW_AT_name */
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.byte 0 /* end of children of DIE 0x17 */
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.Ltu_end:
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.section .debug_info,"",%progbits
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.Ldebug_info0:
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.4byte .Lcu_end - .Lcu_start /* Length of Compilation Unit Info */
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.Lcu_start:
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.2byte 0x4 /* DWARF version number */
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.4byte .Ldebug_abbrev0 /* Offset Into Abbrev. Section */
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.byte 0x4 /* Pointer Size (in bytes) */
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.uleb128 0x5 /* (DIE (0xb) DW_TAG_compile_unit) */
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.4byte .LASF0 /* DW_AT_producer: "GNU C++ 4.6.3 20120306" */
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.byte 0x4 /* DW_AT_language */
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.4byte .LASF1 /* DW_AT_name: "pr13961.cc" */
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.4byte .LASF2 /* DW_AT_comp_dir: "." */
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.4byte .Ltext0 /* DW_AT_low_pc */
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.4byte .Letext0 /* DW_AT_high_pc */
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.4byte .Ldebug_line0 /* DW_AT_stmt_list */
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.Lint_base_type:
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.uleb128 0x4 /* (DIE (0x25) DW_TAG_base_type) */
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.byte 0x4 /* DW_AT_byte_size */
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.byte 0x5 /* DW_AT_encoding */
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.ascii "int\0" /* DW_AT_name */
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.uleb128 0x6 /* (DIE (0x2c) DW_TAG_subprogram) */
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/* DW_AT_external */
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.4byte .LASF3 /* DW_AT_name: "main" */
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.byte 0x1 /* DW_AT_decl_file (pr13961.cc) */
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.byte 0xa /* DW_AT_decl_line */
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.4byte 0x25 /* DW_AT_type */
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.4byte .LFB0 /* DW_AT_low_pc */
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.4byte .LFE0 /* DW_AT_high_pc */
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.uleb128 0x1 /* DW_AT_frame_base */
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.byte 0x9c /* DW_OP_call_frame_cfa */
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/* DW_AT_GNU_all_call_sites */
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.uleb128 0x7 /* (DIE (0x41) DW_TAG_variable) */
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.ascii "baz\0" /* DW_AT_name */
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.byte 0x1 /* DW_AT_decl_file (pr13961.cc) */
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.byte 0x7 /* DW_AT_decl_line */
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.byte 0x19 /* DW_AT_type */
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.byte 0x8b
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.byte 0x7e
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.byte 0xac
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.byte 0xce
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.byte 0xf1
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.byte 0x22
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.byte 0x90
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/* DW_AT_external */
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.uleb128 0x5 /* DW_AT_location */
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.byte 0x3 /* DW_OP_addr */
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.4byte baz
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/* Manually inserted to have a DW_AT_specification refering to
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something and appearing ahead of it. */
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.uleb128 0x8 /* DW_TAG_class_type */
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.4byte .Lcu_class_type - .Ldebug_info0 /* DW_AT_specification */
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.Lcu_int_type:
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.uleb128 0x4 /* (DIE (0x3f) DW_TAG_base_type) */
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.byte 0x4 /* DW_AT_byte_size */
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.byte 0x5 /* DW_AT_encoding */
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.ascii "int\0" /* DW_AT_name */
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.Lcu_class_type:
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.uleb128 0x2 /* (DIE (0x25) DW_TAG_class_type) */
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.ascii "foo2\0" /* DW_AT_name */
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.byte 0x4 /* DW_AT_byte_size */
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.byte 0x1 /* DW_AT_decl_file (pr13961.cc) */
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.byte 0x1 /* DW_AT_decl_line */
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.4byte 0x3f /* DW_AT_sibling */
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.uleb128 0x3 /* (DIE (0x31) DW_TAG_member) */
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.ascii "bar\0" /* DW_AT_name */
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.byte 0x1 /* DW_AT_decl_file (pr13961.cc) */
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.byte 0x4 /* DW_AT_decl_line */
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.4byte .Lcu_int_type - .Ldebug_info0 /* DW_AT_type */
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.byte 0 /* DW_AT_data_member_location */
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.byte 0x1 /* DW_AT_accessibility */
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.byte 0 /* end of children of DIE 0x25 */
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.uleb128 0x4 /* (DIE (0x3f) DW_TAG_base_type) */
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.byte 0x4 /* DW_AT_byte_size */
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.byte 0x5 /* DW_AT_encoding */
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.ascii "int\0" /* DW_AT_name */
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.byte 0 /* end of children of DIE 0x17 */
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/* End of manual insertion */
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.byte 0 /* end of children of DIE 0xb */
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.Lcu_end:
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.section .debug_abbrev,"",%progbits
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.Ldebug_abbrev0:
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.uleb128 0x1 /* (abbrev code) */
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.uleb128 0x41 /* (TAG: DW_TAG_type_unit) */
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.byte 0x1 /* DW_children_yes */
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.uleb128 0x13 /* (DW_AT_language) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x210f /* (DW_AT_GNU_odr_signature) */
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.uleb128 0x7 /* (DW_FORM_data8) */
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.uleb128 0x10 /* (DW_AT_stmt_list) */
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.uleb128 0x17 /* (DW_FORM_sec_offset) */
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.byte 0
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.byte 0
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.uleb128 0x2 /* (abbrev code) */
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.uleb128 0x2 /* (TAG: DW_TAG_class_type) */
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.byte 0x1 /* DW_children_yes */
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.uleb128 0x3 /* (DW_AT_name) */
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.uleb128 0x8 /* (DW_FORM_string) */
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.uleb128 0xb /* (DW_AT_byte_size) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3a /* (DW_AT_decl_file) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3b /* (DW_AT_decl_line) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x1 /* (DW_AT_sibling) */
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.uleb128 0x13 /* (DW_FORM_ref4) */
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.byte 0
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.byte 0
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.uleb128 0x3 /* (abbrev code) */
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.uleb128 0xd /* (TAG: DW_TAG_member) */
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.byte 0 /* DW_children_no */
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.uleb128 0x3 /* (DW_AT_name) */
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.uleb128 0x8 /* (DW_FORM_string) */
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.uleb128 0x3a /* (DW_AT_decl_file) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3b /* (DW_AT_decl_line) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x49 /* (DW_AT_type) */
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.uleb128 0x13 /* (DW_FORM_ref4) */
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.uleb128 0x38 /* (DW_AT_data_member_location) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x32 /* (DW_AT_accessibility) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.byte 0
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.byte 0
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.uleb128 0x4 /* (abbrev code) */
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.uleb128 0x24 /* (TAG: DW_TAG_base_type) */
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.byte 0 /* DW_children_no */
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.uleb128 0xb /* (DW_AT_byte_size) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3e /* (DW_AT_encoding) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3 /* (DW_AT_name) */
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.uleb128 0x8 /* (DW_FORM_string) */
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.byte 0
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.byte 0
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.uleb128 0x5 /* (abbrev code) */
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.uleb128 0x11 /* (TAG: DW_TAG_compile_unit) */
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.byte 0x1 /* DW_children_yes */
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.uleb128 0x25 /* (DW_AT_producer) */
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.uleb128 0xe /* (DW_FORM_strp) */
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.uleb128 0x13 /* (DW_AT_language) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3 /* (DW_AT_name) */
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.uleb128 0xe /* (DW_FORM_strp) */
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.uleb128 0x1b /* (DW_AT_comp_dir) */
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.uleb128 0xe /* (DW_FORM_strp) */
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.uleb128 0x11 /* (DW_AT_low_pc) */
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.uleb128 0x1 /* (DW_FORM_addr) */
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.uleb128 0x12 /* (DW_AT_high_pc) */
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.uleb128 0x1 /* (DW_FORM_addr) */
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.uleb128 0x10 /* (DW_AT_stmt_list) */
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.uleb128 0x17 /* (DW_FORM_sec_offset) */
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.byte 0
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.byte 0
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.uleb128 0x6 /* (abbrev code) */
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.uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
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.byte 0 /* DW_children_no */
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.uleb128 0x3f /* (DW_AT_external) */
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.uleb128 0x19 /* (DW_FORM_flag_present) */
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.uleb128 0x3 /* (DW_AT_name) */
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.uleb128 0xe /* (DW_FORM_strp) */
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.uleb128 0x3a /* (DW_AT_decl_file) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3b /* (DW_AT_decl_line) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x49 /* (DW_AT_type) */
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.uleb128 0x13 /* (DW_FORM_ref4) */
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.uleb128 0x11 /* (DW_AT_low_pc) */
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.uleb128 0x1 /* (DW_FORM_addr) */
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.uleb128 0x12 /* (DW_AT_high_pc) */
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.uleb128 0x1 /* (DW_FORM_addr) */
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.uleb128 0x40 /* (DW_AT_frame_base) */
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.uleb128 0x18 /* (DW_FORM_exprloc) */
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.uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
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.uleb128 0x19 /* (DW_FORM_flag_present) */
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.byte 0
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.byte 0
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.uleb128 0x7 /* (abbrev code) */
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.uleb128 0x34 /* (TAG: DW_TAG_variable) */
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.byte 0 /* DW_children_no */
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.uleb128 0x3 /* (DW_AT_name) */
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.uleb128 0x8 /* (DW_FORM_string) */
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.uleb128 0x3a /* (DW_AT_decl_file) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x3b /* (DW_AT_decl_line) */
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.uleb128 0xb /* (DW_FORM_data1) */
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.uleb128 0x49 /* (DW_AT_type) */
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.uleb128 0x20 /* (DW_FORM_ref_sig8) */
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.uleb128 0x3f /* (DW_AT_external) */
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.uleb128 0x19 /* (DW_FORM_flag_present) */
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.uleb128 0x2 /* (DW_AT_location) */
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.uleb128 0x18 /* (DW_FORM_exprloc) */
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.byte 0
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.byte 0
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/* Manually inserted. */
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.uleb128 0x8 /* abbrev code */
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.uleb128 0x2 /* DW_TAG_class_type */
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.byte 0x0 /* DW_has_children_no */
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.uleb128 0x47 /* DW_AT_specification */
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.uleb128 0x13 /* DW_FORM_ref4 */
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.byte 0x0 /* Terminator */
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.byte 0x0 /* Terminator */
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/* End of manual insertion. */
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.byte 0
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.section .debug_aranges,"",%progbits
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.4byte 0x1c /* Length of Address Ranges Info */
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.2byte 0x2 /* DWARF Version */
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.4byte .Ldebug_info0 /* Offset of Compilation Unit Info */
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.byte 0x4 /* Size of Address */
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.byte 0 /* Size of Segment Descriptor */
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.2byte 0 /* Pad to 8 byte boundary */
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.2byte 0
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|
.4byte .Ltext0 /* Address */
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.4byte .Letext0-.Ltext0 /* Length */
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.4byte 0
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.4byte 0
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.section .debug_line,"",%progbits
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|
.Ldebug_line0:
|
|
|
|
.section .debug_str,"MS",%progbits,1
|
|
.LASF0:
|
|
.string "GNU C++ 4.6.3 20120306"
|
|
.LASF2:
|
|
.string "."
|
|
.LASF1:
|
|
.string "pr13961.cc"
|
|
.LASF3:
|
|
.string "main"
|
|
|