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* From Peter Schauer:

Browse Source 
* infrun.c (wait_for_inferior): Remove breakpoints and
        switch terminal settings before calling SOLIB_ADD.
        * solib.c (enable_break, SVR4 variant): Don't map in symbols
        for the dynamic linker, the namespace pollution causes real
        problems.
This commit is contained in:
Jeff Law 1996-03-04 21:50:10 +00:00
parent 421e2c270e
commit 11be829fa1
3 changed files with 34 additions and 34 deletions
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9
gdb/ChangeLog
View File

@ -1,3 +1,12 @@
Mon Mar 4 14:44:54 1996 Jeffrey A Law (law@cygnus.com)
* From Peter Schauer:
* infrun.c (wait_for_inferior): Remove breakpoints and
switch terminal settings before calling SOLIB_ADD.
* solib.c (enable_break, SVR4 variant): Don't map in symbols
for the dynamic linker, the namespace pollution causes real
problems.
Sun Mar 3 17:18:57 1996 James G. Smith <jsmith@cygnus.co.uk>
* remote-mips.c (common_breakpoint): Explicitly terminate the

18
gdb/infrun.c
View File

@ -1042,7 +1042,19 @@ wait_for_inferior ()
/* Check for any newly added shared libraries if we're
supposed to be adding them automatically. */
if (auto_solib_add)
SOLIB_ADD (NULL, 0, NULL);
{
/* Remove breakpoints, SOLIB_ADD might adjust breakpoint
addresses via breakpoint_re_set. */
if (breakpoints_inserted)
remove_breakpoints ();
breakpoints_inserted = 0;
/* Switch terminal for any messages produced by
breakpoint_re_set. */
target_terminal_ours_for_output ();
SOLIB_ADD (NULL, 0, NULL);
target_terminal_inferior ();
}
/* If requested, stop when the dynamic linker notifies
gdb of events. This allows the user to get control
@ -1658,7 +1670,9 @@ Further execution is probably impossible.\n");
target_terminal_ours ();
if (stop_bpstat && stop_bpstat->breakpoint_at->type == bp_shlib_event)
if (stop_bpstat
&& stop_bpstat->breakpoint_at
&& stop_bpstat->breakpoint_at->type == bp_shlib_event)
printf_filtered ("Stopped due to shared library event\n");
/* Look up the hook_stop and run it if it exists. */

41
gdb/solib.c
View File

@ -1371,9 +1371,7 @@ enable_break ()
#ifdef BKPT_AT_SYMBOL
struct minimal_symbol *msymbol;
struct objfile *objfile;
char **bkpt_namep;
CORE_ADDR bkpt_addr;
asection *interp_sect;
/* First, remove all the solib event breakpoints. Their addresses
@ -1390,7 +1388,7 @@ enable_break ()
char *buf;
CORE_ADDR load_addr;
bfd *tmp_bfd;
asection *lowest_sect;
CORE_ADDR sym_addr = 0;
/* Read the contents of the .interp section into a local buffer;
the contents specify the dynamic linker this program uses. */
@ -1424,42 +1422,21 @@ enable_break ()
linker) and subtracting the offset of the entry point. */
load_addr = read_pc () - tmp_bfd->start_address;
/* load_addr now has the base address of the dynamic linker;
however, due to severe braindamage in syms_from_objfile
we need to add the address of the .text section, or the
lowest section of .text doesn't exist to work around the
braindamage. Gross. */
lowest_sect = bfd_get_section_by_name (tmp_bfd, ".text");
if (lowest_sect == NULL)
bfd_map_over_sections (tmp_bfd, find_lowest_section,
(PTR) &lowest_sect);
if (lowest_sect == NULL)
/* Now try to set a breakpoint in the dynamic linker. */
for (bkpt_namep = solib_break_names; *bkpt_namep != NULL; bkpt_namep++)
{
warning ("Unable to find base address for dynamic linker %s\n", buf);
bfd_close (tmp_bfd);
goto bkpt_at_symbol;
sym_addr = bfd_lookup_symbol (tmp_bfd, *bkpt_namep);
if (sym_addr != 0)
break;
}
load_addr += bfd_section_vma (tmp_bfd, lowest_sect);
/* We're done with the temporary bfd. */
bfd_close (tmp_bfd);
/* Now make GDB aware of the symbols in the dynamic linker. Some
might complain about namespace pollution, but as a developer I've
often wanted these symbols available from within the debugger. */
objfile = symbol_file_add (buf, 0, load_addr, 0, 0, 1);
/* Now try to set a breakpoint in the dynamic linker. */
for (bkpt_namep = solib_break_names; *bkpt_namep != NULL; bkpt_namep++)
if (sym_addr != 0)
{
msymbol = lookup_minimal_symbol (*bkpt_namep, NULL, objfile);
if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
{
create_solib_event_breakpoint (SYMBOL_VALUE_ADDRESS (msymbol));
return 1;
}
create_solib_event_breakpoint (load_addr + sym_addr);
return 1;
}
/* For whatever reason we couldn't set a breakpoint in the dynamic