/* Native support for the SGI Iris running IRIX version 5, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994
+ Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
Free Software Foundation, Inc.
Contributed by Alessandro Forin(af@cs.cmu.edu) at CMU
and by Per Bothner(bothner@cs.wisc.edu) at U.Wisconsin.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "inferior.h"
#include "gdbcore.h"
#include "target.h"
+#include "gdb_string.h"
#include <sys/time.h>
#include <sys/procfs.h>
#include <setjmp.h> /* For JB_XXX. */
{
register int regi;
register greg_t *regp = &(*gregsetp)[0];
+ static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
for(regi = 0; regi <= CTX_RA; regi++)
supply_register (regi, (char *)(regp + regi));
supply_register (HI_REGNUM, (char *)(regp + CTX_MDHI));
supply_register (LO_REGNUM, (char *)(regp + CTX_MDLO));
supply_register (CAUSE_REGNUM, (char *)(regp + CTX_CAUSE));
+
+ /* Fill inaccessible registers with zero. */
+ supply_register (BADVADDR_REGNUM, zerobuf);
}
void
*(regp + CTX_EPC) = *(greg_t *) ®isters[REGISTER_BYTE (PC_REGNUM)];
if ((regno == -1) || (regno == CAUSE_REGNUM))
- *(regp + CTX_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (PS_REGNUM)];
+ *(regp + CTX_CAUSE) = *(greg_t *) ®isters[REGISTER_BYTE (CAUSE_REGNUM)];
if ((regno == -1) || (regno == HI_REGNUM))
*(regp + CTX_MDHI) = *(greg_t *) ®isters[REGISTER_BYTE (HI_REGNUM)];
fpregset_t *fpregsetp;
{
register int regi;
+ static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
for (regi = 0; regi < 32; regi++)
supply_register (FP0_REGNUM + regi,
supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
/* FIXME: how can we supply FCRIR_REGNUM? SGI doesn't tell us. */
+ supply_register (FCRIR_REGNUM, zerobuf);
}
void
return 1;
}
-void
+static void
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
char *core_reg_sect;
unsigned core_reg_size;
#include <sys/types.h>
#include <signal.h>
-#include <string.h>
#include <sys/param.h>
#include <fcntl.h>
#include "objfiles.h"
#include "command.h"
#include "frame.h"
-#include "regex.h"
+#include "gnu-regex.h"
#include "inferior.h"
#include "language.h"
-
-/* We need to set a breakpoint at a point when we know that the
- mapping of shared libraries is complete. dbx simply breaks at main
- (or, for FORTRAN, MAIN__), so we do the same. We can not break at
- the very beginning of main, because the startup code will jump into
- main after the GP initialization instructions. SOLIB_BKPT_OFFSET
- is used to skip those instructions. */
-
-#define SOLIB_BKPT_OFFSET 12
-
-static char *bkpt_names[] = {
- "main",
- "MAIN__",
- NULL
-};
+#include "gdbcmd.h"
/* The symbol which starts off the list of shared libraries. */
#define DEBUG_BASE "__rld_obj_head"
struct minimal_symbol *msymbol;
CORE_ADDR address = 0;
- msymbol = lookup_minimal_symbol (DEBUG_BASE, symfile_objfile);
+ msymbol = lookup_minimal_symbol (DEBUG_BASE, NULL, symfile_objfile);
if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
{
address = SYMBOL_VALUE_ADDRESS (msymbol);
}
/* Add the shared library sections to the section table of the
- specified target, if any. We have to do this before reading the
- symbol files as symbol_file_add calls reinit_frame_cache and
- creating a new frame might access memory in the shared library. */
+ specified target, if any. */
if (target)
{
/* Count how many new section_table entries there are. */
if (count)
{
+ int update_coreops;
+
+ /* We must update the to_sections field in the core_ops structure
+ here, otherwise we dereference a potential dangling pointer
+ for each call to target_read/write_memory within this routine. */
+ update_coreops = core_ops.to_sections == target->to_sections;
+
/* Reallocate the target's section table including the new size. */
if (target -> to_sections)
{
}
target -> to_sections_end = target -> to_sections + (count + old);
+ /* Update the to_sections field in the core_ops structure
+ if needed. */
+ if (update_coreops)
+ {
+ core_ops.to_sections = target->to_sections;
+ core_ops.to_sections_end = target->to_sections_end;
+ }
+
/* Add these section table entries to the target's table. */
while ((so = find_solib (so)) != NULL)
{
}
}
}
+
+ /* Getting new symbols may change our opinion about what is
+ frameless. */
+ if (so_last)
+ reinit_frame_cache ();
}
/*
SYNOPSIS
- int solib_address (CORE_ADDR address)
+ char *solib_address (CORE_ADDR address)
DESCRIPTION
mapped in.
*/
-int
+char *
solib_address (address)
CORE_ADDR address;
{
{
if ((address >= (CORE_ADDR) LM_ADDR (so)) &&
(address < (CORE_ADDR) so -> lmend))
- {
- return (1);
- }
+ return (so->lm.o_path);
}
}
return (0);
if (so_list_head -> abfd)
{
bfd_filename = bfd_get_filename (so_list_head -> abfd);
- bfd_close (so_list_head -> abfd);
+ if (!bfd_close (so_list_head -> abfd))
+ warning ("cannot close \"%s\": %s",
+ bfd_filename, bfd_errmsg (bfd_get_error ()));
}
else
/* This happens for the executable on SVR4. */
DESCRIPTION
- Both the SunOS and the SVR4 dynamic linkers have, as part of their
- debugger interface, support for arranging for the inferior to hit
- a breakpoint after mapping in the shared libraries. This function
- enables that breakpoint.
-
- For SunOS, there is a special flag location (in_debugger) which we
- set to 1. When the dynamic linker sees this flag set, it will set
- a breakpoint at a location known only to itself, after saving the
- original contents of that place and the breakpoint address itself,
- in it's own internal structures. When we resume the inferior, it
- will eventually take a SIGTRAP when it runs into the breakpoint.
- We handle this (in a different place) by restoring the contents of
- the breakpointed location (which is only known after it stops),
- chasing around to locate the shared libraries that have been
- loaded, then resuming.
-
- For SVR4, the debugger interface structure contains a member (r_brk)
- which is statically initialized at the time the shared library is
- built, to the offset of a function (_r_debug_state) which is guaran-
- teed to be called once before mapping in a library, and again when
- the mapping is complete. At the time we are examining this member,
- it contains only the unrelocated offset of the function, so we have
- to do our own relocation. Later, when the dynamic linker actually
- runs, it relocates r_brk to be the actual address of _r_debug_state().
-
- The debugger interface structure also contains an enumeration which
- is set to either RT_ADD or RT_DELETE prior to changing the mapping,
- depending upon whether or not the library is being mapped or unmapped,
- and then set to RT_CONSISTENT after the library is mapped/unmapped.
-
- Irix 5, on the other hand, has no such features. Instead, we
- set a breakpoint at main.
+ This functions inserts a breakpoint at the entry point of the
+ main executable, where all shared libraries are mapped in.
*/
static int
enable_break ()
{
- int success = 0;
- struct minimal_symbol *msymbol;
- char **bkpt_namep;
- CORE_ADDR bkpt_addr;
-
- /* Scan through the list of symbols, trying to look up the symbol and
- set a breakpoint there. Terminate loop when we/if we succeed. */
-
- breakpoint_addr = 0;
- for (bkpt_namep = bkpt_names; *bkpt_namep != NULL; bkpt_namep++)
+ if (symfile_objfile != NULL
+ && target_insert_breakpoint (symfile_objfile->ei.entry_point,
+ shadow_contents) == 0)
{
- msymbol = lookup_minimal_symbol (*bkpt_namep, symfile_objfile);
- if ((msymbol != NULL) && (SYMBOL_VALUE_ADDRESS (msymbol) != 0))
- {
- bkpt_addr = SYMBOL_VALUE_ADDRESS (msymbol);
-#ifdef SOLIB_BKPT_OFFSET
- /* We only want to skip if bkpt_addr is currently pointing
- at a GP setting instruction. */
- {
- char buf[4];
-
- if (target_read_memory (bkpt_addr, buf, 4) == 0)
- {
- unsigned long insn;
-
- insn = extract_unsigned_integer (buf, 4);
- if ((insn & 0xffff0000) == 0x3c1c0000) /* lui $gp,n */
- bkpt_addr += SOLIB_BKPT_OFFSET;
- }
- }
-#endif
- if (target_insert_breakpoint (bkpt_addr, shadow_contents) == 0)
- {
- breakpoint_addr = bkpt_addr;
- success = 1;
- break;
- }
- }
+ breakpoint_addr = symfile_objfile->ei.entry_point;
+ return 1;
}
- return (success);
+ return 0;
}
/*
wait_for_inferior ();
}
while (stop_signal != SIGTRAP);
- stop_soon_quietly = 0;
/* We are now either at the "mapping complete" breakpoint (or somewhere
else, a condition we aren't prepared to deal with anyway), so adjust
warning ("shared library handler failed to disable breakpoint");
}
- solib_add ((char *) 0, 0, (struct target_ops *) 0);
+ /* solib_add will call reinit_frame_cache.
+ But we are stopped in the startup code and we might not have symbols
+ for the startup code, so heuristic_proc_start could be called
+ and will put out an annoying warning.
+ Delaying the resetting of stop_soon_quietly until after symbol loading
+ suppresses the warning. */
+ if (auto_solib_add)
+ solib_add ((char *) 0, 0, (struct target_ops *) 0);
+ stop_soon_quietly = 0;
}
/*
void
_initialize_solib()
{
-
add_com ("sharedlibrary", class_files, sharedlibrary_command,
"Load shared object library symbols for files matching REGEXP.");
add_info ("sharedlibrary", info_sharedlibrary_command,
"Status of loaded shared object libraries.");
+
+ add_show_from_set
+ (add_set_cmd ("auto-solib-add", class_support, var_zinteger,
+ (char *) &auto_solib_add,
+ "Set autoloading of shared library symbols.\n\
+If nonzero, symbols from all shared object libraries will be loaded\n\
+automatically when the inferior begins execution or when the dynamic linker\n\
+informs gdb that a new library has been loaded. Otherwise, symbols\n\
+must be loaded manually, using `sharedlibrary'.",
+ &setlist),
+ &showlist);
+}
+
+\f
+/* Register that we are able to handle irix5 core file formats.
+ This really is bfd_target_unknown_flavour */
+
+static struct core_fns irix5_core_fns =
+{
+ bfd_target_unknown_flavour,
+ fetch_core_registers,
+ NULL
+};
+
+void
+_initialize_core_irix5 ()
+{
+ add_core_fns (&irix5_core_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff