Hello,
I have a problem with internal assembler labels. We use #define USER_LABEL_PREFIX "_" in our i386 config to prefix global symbols.
This is working, but the problem is that local internal assembler labels like ".L1" also get the prefix ("_.L1"), but not all of them. This produces unresolved symbols at the target.
The -fleading-underscore switch produces the same problem.
We can’t update to a newer version of GCC at the moment, because we use a third-party target platform.
It would be great If you can tell me the interesting code lines where the problem could be so that I can fix it.
I have attached 2 backtraces. In the first, the problem appears at a internal label. The second backtrace is the case where it works correctly with a global function.
Thanks in advance and Best regards,
Benjamin Burtscher
Compiled with MinGW with the following configuration:
#The relative pathnames must not be changed!
../../../src/gcc-4.1.2/configure \
--prefix=$MSYS/local/bachmann \
--host=i686-pc-mingw32 \
--target=i386-wrs-vxworks \
--with-languages=c,c++ \
--enable-languages=c,c++ \
--enable-sjlj-exceptions \
--disable-nls \
--without-libiconv-prefix \
--with-headers=../../../src/vxworks-headers \
--with-pkgversion="$DATE"
(gdb) bt
#0 assemble_name_raw (file=0x75182960 <msvcrt!_iob+96>, name=0x28f990 ".L19")
at ../../../../src/gcc-4.1.2/gcc/varasm.c:2034
#1 0x0057148f in output_asm_label (x=<optimized out>) at ../../../../src/gcc-4.1.2/gcc/final.c:3184
#2 0x00571d58 in output_asm_insn (operands=0x9395a0 <recog_data>,
template=0x8042e9 <eliminables.16431+9801> "%+j%C1 %l0") at ../../../../src/gcc-4.1.2/gcc/final.c:3092
#3 output_asm_insn (template=0x8042e9 <eliminables.16431+9801> "%+j%C1 %l0", operands=0x9395a0 <recog_data>)
at ../../../../src/gcc-4.1.2/gcc/final.c:2958
#4 0x005728c0 in final_scan_insn (insn=0x20e1850, file=0x75182960 <msvcrt!_iob+96>, optimize=0, nopeepholes=0,
seen=0x28fc0c) at ../../../../src/gcc-4.1.2/gcc/final.c:2499
#5 0x00572ec4 in final (first=0x20de520, file=0x75182960 <msvcrt!_iob+96>, optimize=0)
at ../../../../src/gcc-4.1.2/gcc/final.c:1617
#6 0x00572f87 in rest_of_handle_final () at ../../../../src/gcc-4.1.2/gcc/final.c:3949
#7 0x00526344 in execute_one_pass (pass=0x7a7160 <pass_final>) at ../../../../src/gcc-4.1.2/gcc/passes.c:827
#8 0x00527023 in execute_pass_list (pass=0x7a7160 <pass_final>) at ../../../../src/gcc-4.1.2/gcc/passes.c:859
#9 0x00527036 in execute_pass_list (pass=0x7a5ce0 <pass_postreload>) at ../../../../src/gcc-4.1.2/gcc/passes.c:860
#10 0x00527036 in execute_pass_list (pass=0x7a5d20 <pass_rest_of_compilation>)
at ../../../../src/gcc-4.1.2/gcc/passes.c:860
#11 0x0052ef92 in tree_rest_of_compilation (fndecl=0x20b5b80) at ../../../../src/gcc-4.1.2/gcc/tree-optimize.c:419
#12 0x0040ce7c in c_expand_body (fndecl=0x20b5b80) at ../../../../src/gcc-4.1.2/gcc/c-decl.c:6689
#13 0x004a3962 in cgraph_expand_function (node=0x20b5c00) at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:1141
#14 0x004a3a4d in cgraph_assemble_pending_functions () at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:358
#15 cgraph_assemble_pending_functions () at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:341
#16 0x004a4169 in cgraph_finalize_function (decl=0x20b5b80, nested=0 '\000')
at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:461
#17 0x0040d1dd in finish_function () at ../../../../src/gcc-4.1.2/gcc/c-decl.c:6658
#18 0x0044356e in c_parser_declaration_or_fndef (parser=0x1c4e168, fndef_ok=1 '\001', empty_ok=<optimized out>,
nested=0 '\000', start_attr_ok=1 '\001') at ../../../../src/gcc-4.1.2/gcc/c-parser.c:1307
#19 0x00444d73 in c_parser_external_declaration (parser=0x1c4e168) at ../../../../src/gcc-4.1.2/gcc/c-parser.c:1071
#20 0x0044586c in c_parser_translation_unit (parser=0x1c4e168) at ../../../../src/gcc-4.1.2/gcc/c-parser.c:977
#21 c_parse_file () at ../../../../src/gcc-4.1.2/gcc/c-parser.c:6260
#22 0x00436904 in c_common_parse_file (set_yydebug=0) at ../../../../src/gcc-4.1.2/gcc/c-opts.c:1152
#23 0x00500adc in compile_file () at ../../../../src/gcc-4.1.2/gcc/toplev.c:991
#24 do_compile () at ../../../../src/gcc-4.1.2/gcc/toplev.c:1952
#25 toplev_main (argc=16, argv=0x1c21140) at ../../../../src/gcc-4.1.2/gcc/toplev.c:1984
#26 0x007a0758 in main (argc=16, argv=0x1c21140) at ../../../../src/gcc-4.1.2/gcc/main.c:35
(gdb)
(gdb) bt
#0 assemble_name_raw (file=0x75182960 <msvcrt!_iob+96>, name=0x20a0b39 "CNew_RpcDeinit")
at ../../../../src/gcc-4.1.2/gcc/varasm.c:2034
#1 0x00571666 in output_addr_const (file=0x75182960 <msvcrt!_iob+96>, x=0x209cce0)
at ../../../../src/gcc-4.1.2/gcc/final.c:3242
#2 0x004f2925 in print_operand (file=0x75182960 <msvcrt!_iob+96>, x=0x209cce0, code=80)
at ../../../../src/gcc-4.1.2/gcc/config/i386/i386.c:7485
#3 0x0057126c in output_operand (x=0x209cce0, code=<optimized out>) at ../../../../src/gcc-4.1.2/gcc/final.c:3206
#4 0x00571b79 in output_asm_insn (operands=0x9395a0 <recog_data>,
template=0x801d0e <eliminables.16431+110> "call %P0") at ../../../../src/gcc-4.1.2/gcc/final.c:3114
#5 output_asm_insn (template=0x801d0e <eliminables.16431+110> "call %P0", operands=0x9395a0 <recog_data>)
at ../../../../src/gcc-4.1.2/gcc/final.c:2958
#6 0x005728c0 in final_scan_insn (insn=0x20e19d8, file=0x75182960 <msvcrt!_iob+96>, optimize=0, nopeepholes=0,
seen=0x28fc0c) at ../../../../src/gcc-4.1.2/gcc/final.c:2499
#7 0x00572ec4 in final (first=0x20de520, file=0x75182960 <msvcrt!_iob+96>, optimize=0)
at ../../../../src/gcc-4.1.2/gcc/final.c:1617
#8 0x00572f87 in rest_of_handle_final () at ../../../../src/gcc-4.1.2/gcc/final.c:3949
#9 0x00526344 in execute_one_pass (pass=0x7a7160 <pass_final>) at ../../../../src/gcc-4.1.2/gcc/passes.c:827
#10 0x00527023 in execute_pass_list (pass=0x7a7160 <pass_final>) at ../../../../src/gcc-4.1.2/gcc/passes.c:859
#11 0x00527036 in execute_pass_list (pass=0x7a5ce0 <pass_postreload>) at ../../../../src/gcc-4.1.2/gcc/passes.c:860
#12 0x00527036 in execute_pass_list (pass=0x7a5d20 <pass_rest_of_compilation>)
at ../../../../src/gcc-4.1.2/gcc/passes.c:860
#13 0x0052ef92 in tree_rest_of_compilation (fndecl=0x20b5b80) at ../../../../src/gcc-4.1.2/gcc/tree-optimize.c:419
#14 0x0040ce7c in c_expand_body (fndecl=0x20b5b80) at ../../../../src/gcc-4.1.2/gcc/c-decl.c:6689
#15 0x004a3962 in cgraph_expand_function (node=0x20b5c00) at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:1141
#16 0x004a3a4d in cgraph_assemble_pending_functions () at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:358
#17 cgraph_assemble_pending_functions () at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:341
#18 0x004a4169 in cgraph_finalize_function (decl=0x20b5b80, nested=0 '\000')
at ../../../../src/gcc-4.1.2/gcc/cgraphunit.c:461
#19 0x0040d1dd in finish_function () at ../../../../src/gcc-4.1.2/gcc/c-decl.c:6658
#20 0x0044356e in c_parser_declaration_or_fndef (parser=0x1c4e168, fndef_ok=1 '\001', empty_ok=<optimized out>,
nested=0 '\000', start_attr_ok=1 '\001') at ../../../../src/gcc-4.1.2/gcc/c-parser.c:1307
#21 0x00444d73 in c_parser_external_declaration (parser=0x1c4e168) at ../../../../src/gcc-4.1.2/gcc/c-parser.c:1071
#22 0x0044586c in c_parser_translation_unit (parser=0x1c4e168) at ../../../../src/gcc-4.1.2/gcc/c-parser.c:977
#23 c_parse_file () at ../../../../src/gcc-4.1.2/gcc/c-parser.c:6260
#24 0x00436904 in c_common_parse_file (set_yydebug=0) at ../../../../src/gcc-4.1.2/gcc/c-opts.c:1152
#25 0x00500adc in compile_file () at ../../../../src/gcc-4.1.2/gcc/toplev.c:991
#26 do_compile () at ../../../../src/gcc-4.1.2/gcc/toplev.c:1952
#27 toplev_main (argc=16, argv=0x1c21140) at ../../../../src/gcc-4.1.2/gcc/toplev.c:1984
#28 0x007a0758 in main (argc=16, argv=0x1c21140) at ../../../../src/gcc-4.1.2/gcc/main.c:35
(gdb)
