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gdb-971126 is working differently with shared libraries on linux than
gdbtk-970507.
Is there a better way to set a breakpoint in a shared library than:
breaking at main
setting breakpoints in shared library
continuing
I never have been able to get the share command to do anything useful...
Is there a way to preload shared libaries?
I'm debugging ld from gas-971213 on linux/libc1.
link-data contains:
set args -m aixppc --noinhibit-exec -Ttext 0x20003868 -Tdata 0x200038b0 -Tbss 0x200038d0 -N -o foo.so data.o --cref --entry=.foobar
break main
r
#break _bfd_relocate_contents
break xcofflink.c:6623
c
For gdb971126, we can't run the second time:
: leisner@dw;gdb $(type -p ld)
GNU gdb 971126
Copyright 1997 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnulibc1"...
(gdb) source link-data
Breakpoint 1 at 0x80563eb: file ../../ld/ldmain.c, line 163.
Breakpoint 1, main (argc=16, argv=0xbfffeb90) at ../../ld/ldmain.c:163
163 long start_time = get_run_time ();
Breakpoint 2 at 0x40081f31: file ../../bfd/xcofflink.c, line 6623.
Breakpoint 2, _bfd_ppc_xcoff_relocate_section (output_bfd=0x8082450,
info=0x807d6c4, input_bfd=0x808d3f0, input_section=0x808eb70,
contents=0x809b078 "\223áÿü\224!ÿà|?\013x\201\"8µ\200i", relocs=0x808f790,
syms=0x809ab20, sections=0x808eaa4) at ../../bfd/xcofflink.c:6623
6623 if (! ((*info->callbacks->reloc_overflow)
(gdb) c
Continuing.
data.o: In function `foobar':
data.c:6: relocation truncated to fit: 0x03 an_int
Cross Reference Table
Symbol File
foobar data.o
foobar data.o
Program exited normally.
(gdb) r
Starting program: /usr/gnu/binutils-debug/bin/ld -m aixppc --noinhibit-exec -Ttext 0x20003868 -Tdata 0x200038b0 -Tbss 0x200038d0 -N -o foo.so data.o --cref --entry=.foobar
Cannot insert breakpoint 2:
Cannot access memory at address 0x40081f31.
(gdb) quit
For gdb 970507:
: leisner@dw;gdbtk -nw $(type -p ld)
GNU gdb 970507
Copyright 1997 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i586-pc-linux-gnu"...
(gdb) source link-data
Breakpoint 1 at 0x80563eb: file ../../ld/ldmain.c, line 163.
Breakpoint 1, main (argc=16, argv=0xbfffeb80) at ../../ld/ldmain.c:163
163 long start_time = get_run_time ();
Breakpoint 2 at 0x40081f31: file ../../bfd/xcofflink.c, line 6623.
Breakpoint 2, _bfd_ppc_xcoff_relocate_section (output_bfd=0x8082450,
info=0x807d6c4, input_bfd=0x808d3f0, input_section=0x808eb70,
contents=0x809b078 "\223áÿü\224!ÿà|?\013x\201\"8µ\200i", relocs=0x808f790,
syms=0x809ab20, sections=0x808eaa4) at ../../bfd/xcofflink.c:6623
6623 if (! ((*info->callbacks->reloc_overflow)
(gdb) c
Continuing.
data.o: In function `foobar':
data.c:6: relocation truncated to fit: 0x03 an_int
Cross Reference Table
Symbol File
foobar data.o
foobar data.o
Program exited normally.
(gdb) r
Starting program: /usr/gnu/binutils-debug/bin/ld -m aixppc --noinhibit-exec -Ttext 0x20003868 -Tdata 0x200038b0 -Tbss 0x200038d0 -N -o foo.so data.o --cref --entry=.foobar
Cannot insert breakpoint 2:
Temporarily disabling shared library breakpoints:
2
Breakpoint 1, main (argc=16, argv=0xbfffeb80) at ../../ld/ldmain.c:163
163 long start_time = get_run_time ();
(gdb) c
Continuing.
Breakpoint 2, _bfd_ppc_xcoff_relocate_section (output_bfd=0x8082450,
info=0x807d6c4, input_bfd=0x808d3f0, input_section=0x808eb70,
contents=0x809b078 "\223áÿü\224!ÿà|?\013x\201\"8µ\200i", relocs=0x808f790,
syms=0x809ab20, sections=0x808eaa4) at ../../bfd/xcofflink.c:6623
6623 if (! ((*info->callbacks->reloc_overflow)
(gdb) quit
marty leisner@sdsp.mc.xerox.com
Don't confuse education with schooling.
Milton Friedman to Yogi Berra