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Re: [RFC-v4] Fix .text section offset for windows DLL (was Calling __stdcall functions in the inferior)


On 2012-11-26 6:50, Pierre Muller wrote:
   I attach a new version of my patch to
cope with variable offset of .text section  for Windows OS DLL's.

   I hope I have taken all advices of Joel in account.
In fact, I was unable to satisfy one suggestion...
See below, the answer about my lack of C knowledge.


Hoping we are getting closer...


Pierre Muller


gdb crash here, see the Backtrace:


(gdb) file cmd.exe
Reading symbols from E:\code\cb\test_code\gdbpython-demo\bin\cmd.exe...done.
(gdb) r
Starting program: E:\code\cb\test_code\gdbpython-demo\bin\cmd.exe
[New Thread 63092.0xf220]
warning: HEAP[gdbcvs26.exe]:
warning: Invalid Address specified to RtlFreeHeap( 00290000, 04C58028 )


Program received signal SIGTRAP, Trace/breakpoint trap. 0x7c90120f in ntdll!DbgUiConnectToDbg () from C:\WINDOWS\system32\ntdll.dll (gdb) bt #0 0x7c90120f in ntdll!DbgUiConnectToDbg () from C:\WINDOWS\system32\ntdll.dll #1 0x7c96ee31 in ntdll!RtlpNtMakeTemporaryKey () from C:\WINDOWS\system32\ntdll.dll #2 0x7c96f26e in ntdll!RtlpNtMakeTemporaryKey () from C:\WINDOWS\system32\ntdll.dll #3 0x7c970456 in ntdll!RtlpNtMakeTemporaryKey () from C:\WINDOWS\system32\ntdll.dll #4 0x7c94bafc in ntdll!LdrFindEntryForAddress () from C:\WINDOWS\system32\ntdll.dll #5 0x00290000 in ?? () #6 0x7c91a1ba in ntdll!RtlpUnWaitCriticalSection () from C:\WINDOWS\system32\ntdll.dll #7 0x77c2c2de in msvcrt!free () from C:\WINDOWS\system32\msvcrt.dll #8 0x00290000 in ?? () #9 0x004a10dd in do_my_cleanups (pmy_chain=0x4c58020, old_chain=0x4c58020) at ../../gdb/gdb/cleanups.c:155 #10 0x00536102 in read_pe_exported_syms (objfile=0x4bf9008) at ../../gdb/gdb/coff-pe-read.c:595 #11 0x00535158 in coff_symtab_read (objfile=0x4bf9008, nsyms=0, symtab_offset=<optimized out>) at ../../gdb/gdb/coffread.c:1127 #12 coff_symfile_read (objfile=0x4bf9008, symfile_flags=8) at ../../gdb/gdb/coffread.c:610 #13 0x004d39e3 in syms_from_objfile (objfile=0x4bf9008, addrs=<optimized out>, offsets=0x0, num_offsets=0, add_flags=8) at ../../gdb/gdb/symfile.c:999 #14 0x004d3ce0 in symbol_file_add_with_addrs_or_offsets ( abfd=<optimized out>, add_flags=8, addrs=0x4bef518, flags=<optimized out>, parent=0x0, num_offsets=0, offsets=0x0) at ../../gdb/gdb/symfile.c:1105 #15 0x005c27a7 in solib_read_symbols (so=0x30055c8, flags=8) at ../../gdb/gdb/solib.c:608 #16 0x005c2bda in solib_add (pattern=0x0, from_tty=0, target=0x96dfa0 <current_target>, readsyms=1) at ../../gdb/gdb/solib.c:919 #17 0x004dfa5e in post_create_inferior (target=0x96dfa0 <current_target>, from_tty=0) at ../../gdb/gdb/infcmd.c:477 #18 0x004dfc0c in run_command_1 (args=0x0, from_tty=<optimized out>, tbreak_at_main=<optimized out>) at ../../gdb/gdb/infcmd.c:631 #19 0x005ad435 in execute_command (p=0x294331 "", from_tty=1) at ../../gdb/gdb/top.c:491 #20 0x004fd7b6 in command_handler (command=0x294330 "") at ../../gdb/gdb/event-top.c:429 #21 0x004fdf63 in command_line_handler (rl=0x2f98a28 " ") at ../../gdb/gdb/event-top.c:630 #22 0x005debd1 in rl_callback_read_char () at ../../gdb/readline/callback.c:220 #23 0x004fd828 in rl_callback_read_char_wrapper (client_data=0x0) at ../../gdb/gdb/event-top.c:163 #24 0x004fcb24 in handle_file_event (data=...) at ../../gdb/gdb/event-loop.c:827 #25 0x004fcab3 in process_event () at ../../gdb/gdb/event-loop.c:401 #26 process_event () at ../../gdb/gdb/event-loop.c:351 #27 0x004fce35 in gdb_do_one_event () at ../../gdb/gdb/event-loop.c:465 #28 0x004fcf8c in start_event_loop () at ../../gdb/gdb/event-loop.c:490 #29 0x004f7762 in captured_command_loop (data=0x0) at ../../gdb/gdb/main.c:256 #30 0x004f64cb in catch_errors (func=0x4f7750 <captured_command_loop>, func_args=0x0, errstring=0x735b8d <__PRETTY_FUNCTION__.12478+107> "", mask=6) at ../../gdb/gdb/exceptions.c:546 #31 0x004f8266 in captured_main (data=0x2a6fee0) at ../../gdb/gdb/main.c:1032 #32 0x004f64cb in catch_errors (func=0x4f7910 <captured_main>, func_args=0x2a6fee0, errstring=0x735b8d <__PRETTY_FUNCTION__.12478+107> "", mask=6) at ../../gdb/gdb/exceptions.c:546 #33 0x004f8850 in gdb_main (args=0x2a6fee0) at ../../gdb/gdb/main.c:1041 #34 0x006d0218 in main (argc=1, argv=0x293ea0) at ../../gdb/gdb/gdb.c:34 (gdb)


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