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aefb0e1e23
gdb/gdb-6.3-pie-20050110.patch
Jan Kratochvil aefb0e1e23 - Upgrade to GDB 6.6. Drop redundant patches, forward-port remaining ones. 
- Backported post gdb-6.6 release ia64 unwinding fixups.
- Testcase for exec() from threaded program (BZ 202689).
- Resolves: rhbz#221125
- Related: rhbz#202689
2007-01-21 01:53:01 +00:00

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Index: gdb-6.6/gdb/dwarf2read.c
===================================================================
--- gdb-6.6.orig/gdb/dwarf2read.c
+++ gdb-6.6/gdb/dwarf2read.c
@@ -1219,7 +1219,7 @@ dwarf2_build_psymtabs (struct objfile *o
else
dwarf2_per_objfile->loc_buffer = NULL;
- if (mainline
+ if ((mainline == 1)
|| (objfile->global_psymbols.size == 0
&& objfile->static_psymbols.size == 0))
{
Index: gdb-6.6/gdb/auxv.c
===================================================================
--- gdb-6.6.orig/gdb/auxv.c
+++ gdb-6.6/gdb/auxv.c
@@ -82,7 +82,7 @@ procfs_xfer_auxv (struct target_ops *ops
Return 1 if an entry was read into *TYPEP and *VALP. */
int
target_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
- gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
+ gdb_byte *endptr, ULONGEST *typep, CORE_ADDR *valp)
{
const int sizeof_auxv_field = TYPE_LENGTH (builtin_type_void_data_ptr);
gdb_byte *ptr = *readptr;
@@ -107,9 +107,10 @@ target_auxv_parse (struct target_ops *op
an error getting the information. On success, return 1 after
storing the entry's value field in *VALP. */
int
-target_auxv_search (struct target_ops *ops, CORE_ADDR match, CORE_ADDR *valp)
+target_auxv_search (struct target_ops *ops, ULONGEST match, CORE_ADDR *valp)
{
- CORE_ADDR type, val;
+ CORE_ADDR val;
+ ULONGEST at_type;
gdb_byte *data;
LONGEST n = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL, &data);
gdb_byte *ptr = data;
@@ -119,10 +120,10 @@ target_auxv_search (struct target_ops *o
return n;
while (1)
- switch (target_auxv_parse (ops, &ptr, data + n, &type, &val))
+ switch (target_auxv_parse (ops, &ptr, data + n, &at_type, &val))
{
case 1: /* Here's an entry, check it. */
- if (type == match)
+ if (at_type == match)
{
xfree (data);
*valp = val;
@@ -145,7 +146,8 @@ target_auxv_search (struct target_ops *o
int
fprint_target_auxv (struct ui_file *file, struct target_ops *ops)
{
- CORE_ADDR type, val;
+ CORE_ADDR val;
+ ULONGEST at_type;
gdb_byte *data;
LONGEST len = target_read_alloc (ops, TARGET_OBJECT_AUXV, NULL,
&data);
@@ -155,14 +157,14 @@ fprint_target_auxv (struct ui_file *file
if (len <= 0)
return len;
- while (target_auxv_parse (ops, &ptr, data + len, &type, &val) > 0)
+ while (target_auxv_parse (ops, &ptr, data + len, &at_type, &val) > 0)
{
extern int addressprint;
const char *name = "???";
const char *description = "";
enum { dec, hex, str } flavor = hex;
- switch (type)
+ switch (at_type)
{
#define TAG(tag, text, kind) \
case tag: name = #tag; description = text; flavor = kind; break
@@ -213,7 +215,7 @@ fprint_target_auxv (struct ui_file *file
}
fprintf_filtered (file, "%-4s %-20s %-30s ",
- paddr_d (type), name, description);
+ paddr_d (at_type), name, description);
switch (flavor)
{
case dec:
Index: gdb-6.6/gdb/auxv.h
===================================================================
--- gdb-6.6.orig/gdb/auxv.h
+++ gdb-6.6/gdb/auxv.h
@@ -37,14 +37,14 @@ struct target_ops; /* Forward declarati
Return 1 if an entry was read into *TYPEP and *VALP. */
extern int target_auxv_parse (struct target_ops *ops,
gdb_byte **readptr, gdb_byte *endptr,
- CORE_ADDR *typep, CORE_ADDR *valp);
+ ULONGEST *typep, CORE_ADDR *valp);
/* Extract the auxiliary vector entry with a_type matching MATCH.
Return zero if no such entry was found, or -1 if there was
an error getting the information. On success, return 1 after
storing the entry's value field in *VALP. */
extern int target_auxv_search (struct target_ops *ops,
- CORE_ADDR match, CORE_ADDR *valp);
+ ULONGEST match, CORE_ADDR *valp);
/* Print the contents of the target's AUXV on the specified file. */
extern int fprint_target_auxv (struct ui_file *file, struct target_ops *ops);
Index: gdb-6.6/gdb/breakpoint.h
===================================================================
--- gdb-6.6.orig/gdb/breakpoint.h
+++ gdb-6.6/gdb/breakpoint.h
@@ -159,6 +159,7 @@ enum enable_state
automatically enabled and reset when the call
"lands" (either completes, or stops at another
eventpoint). */
+ bp_startup_disabled,
bp_permanent /* There is a breakpoint instruction hard-wired into
the target's code. Don't try to write another
breakpoint instruction on top of it, or restore
@@ -807,8 +808,12 @@ extern void remove_thread_event_breakpoi
extern void disable_breakpoints_in_shlibs (int silent);
+extern void disable_breakpoints_at_startup (int silent);
+
extern void re_enable_breakpoints_in_shlibs (void);
+void re_enable_breakpoints_at_startup (void);
+
extern void create_solib_load_event_breakpoint (char *, int, char *, char *);
extern void create_solib_unload_event_breakpoint (char *, int,
Index: gdb-6.6/gdb/symfile-mem.c
===================================================================
--- gdb-6.6.orig/gdb/symfile-mem.c
+++ gdb-6.6/gdb/symfile-mem.c
@@ -110,7 +110,7 @@ symbol_file_add_from_memory (struct bfd
}
objf = symbol_file_add_from_bfd (nbfd, from_tty,
- sai, 0, OBJF_SHARED);
+ sai, 2, OBJF_SHARED);
/* This might change our ideas about frames already looked at. */
reinit_frame_cache ();
Index: gdb-6.6/gdb/infrun.c
===================================================================
--- gdb-6.6.orig/gdb/infrun.c
+++ gdb-6.6/gdb/infrun.c
@@ -2249,6 +2249,11 @@ process_event_stop_test:
code segments in shared libraries might be mapped in now. */
re_enable_breakpoints_in_shlibs ();
+ /* For PIE executables, we dont really know where the
+ breakpoints are going to be until we start up the
+ inferior. */
+ re_enable_breakpoints_at_startup ();
+
/* If requested, stop when the dynamic linker notifies
gdb of events. This allows the user to get control
and place breakpoints in initializer routines for
Index: gdb-6.6/gdb/objfiles.c
===================================================================
--- gdb-6.6.orig/gdb/objfiles.c
+++ gdb-6.6/gdb/objfiles.c
@@ -50,6 +50,9 @@
#include "dictionary.h"
#include "source.h"
+#include "auxv.h"
+#include "elf/common.h"
+
/* Prototypes for local functions */
static void objfile_alloc_data (struct objfile *objfile);
@@ -261,7 +264,19 @@ init_entry_point_info (struct objfile *o
CORE_ADDR
entry_point_address (void)
{
- return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
+ int ret;
+ CORE_ADDR entry_addr;
+
+ /* Find the address of the entry point of the program from the
+ auxv vector. */
+ ret = target_auxv_search (&current_target, AT_ENTRY, &entry_addr);
+ if (ret == 1)
+ return entry_addr;
+ /*if (ret == 0 || ret == -1)*/
+ else
+ {
+ return symfile_objfile ? symfile_objfile->ei.entry_point : 0;
+ }
}
/* Create the terminating entry of OBJFILE's minimal symbol table.
Index: gdb-6.6/gdb/solib-svr4.c
===================================================================
--- gdb-6.6.orig/gdb/solib-svr4.c
+++ gdb-6.6/gdb/solib-svr4.c
@@ -34,6 +34,8 @@
#include "gdbcore.h"
#include "target.h"
#include "inferior.h"
+#include "auxv.h"
+#include "command.h"
#include "gdb_assert.h"
@@ -267,7 +269,9 @@ static char *debug_loader_name;
/* Local function prototypes */
+#if 0
static int match_main (char *);
+#endif
static CORE_ADDR bfd_lookup_symbol (bfd *, char *, flagword);
@@ -389,22 +393,79 @@ elf_locate_base (void)
{
struct bfd_section *dyninfo_sect;
int dyninfo_sect_size;
- CORE_ADDR dyninfo_addr;
+ CORE_ADDR dyninfo_addr, relocated_dyninfo_addr, entry_addr;
gdb_byte *buf;
gdb_byte *bufend;
int arch_size;
+ int ret;
+
+ /* Find the address of the entry point of the program from the
+ auxv vector. */
+ ret = target_auxv_search (&current_target, AT_ENTRY, &entry_addr);
+
+ if (ret == 0 || ret == -1)
+ {
+ /* No auxv info, maybe an older kernel. Fake our way through. */
+ entry_addr = bfd_get_start_address (exec_bfd);
+
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: program entry address not found. Using bfd's 0x%s for %s\n",
+ paddr_nz (entry_addr), exec_bfd->filename);
+ }
+ else
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: found program entry address 0x%s for %s\n",
+ paddr_nz (entry_addr), exec_bfd->filename);
+ }
/* Find the start address of the .dynamic section. */
dyninfo_sect = bfd_get_section_by_name (exec_bfd, ".dynamic");
if (dyninfo_sect == NULL)
- return 0;
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: .dynamic section not found in %s -- return now\n",
+ exec_bfd->filename);
+ return 0;
+ }
+ else
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: .dynamic section found in %s\n",
+ exec_bfd->filename);
+ }
+
dyninfo_addr = bfd_section_vma (exec_bfd, dyninfo_sect);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: unrelocated .dynamic addr 0x%s\n",
+ paddr_nz (dyninfo_addr));
+
+ relocated_dyninfo_addr = dyninfo_addr
+ + entry_addr - bfd_get_start_address(exec_bfd);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: relocated .dyn addr 0x%s for %s\n",
+ paddr_nz(relocated_dyninfo_addr), exec_bfd->filename);
/* Read in .dynamic section, silently ignore errors. */
dyninfo_sect_size = bfd_section_size (exec_bfd, dyninfo_sect);
buf = alloca (dyninfo_sect_size);
- if (target_read_memory (dyninfo_addr, buf, dyninfo_sect_size))
- return 0;
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: read in .dynamic section\n");
+ if (target_read_memory (relocated_dyninfo_addr, buf, dyninfo_sect_size))
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: couldn't read .dynamic section at 0x%s -- return now\n",
+ paddr_nz (relocated_dyninfo_addr));
+ return 0;
+ }
/* Find the DT_DEBUG entry in the the .dynamic section.
For mips elf we look for DT_MIPS_RLD_MAP, mips elf apparently has
@@ -431,6 +492,10 @@ elf_locate_base (void)
{
dyn_ptr = bfd_h_get_32 (exec_bfd,
(bfd_byte *) x_dynp->d_un.d_ptr);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "elf_locate_base: DT_DEBUG entry has value 0x%s -- return now\n",
+ paddr_nz (dyn_ptr));
return dyn_ptr;
}
else if (dyn_tag == DT_MIPS_RLD_MAP)
@@ -556,6 +621,10 @@ solib_svr4_r_map (void)
{
struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "solib_svr4_r_map: read at 0x%s\n",
+ paddr_nz (debug_base + lmo->r_map_offset));
return read_memory_typed_address (debug_base + lmo->r_map_offset,
builtin_type_void_data_ptr);
}
@@ -713,6 +782,11 @@ svr4_current_sos (void)
struct so_list **link_ptr = &head;
CORE_ADDR ldsomap = 0;
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: exec_bfd %s\n",
+ exec_bfd->filename);
+
/* Make sure we've looked up the inferior's dynamic linker's base
structure. */
if (! debug_base)
@@ -722,11 +796,21 @@ svr4_current_sos (void)
/* If we can't find the dynamic linker's base structure, this
must not be a dynamically linked executable. Hmm. */
if (! debug_base)
- return svr4_default_sos ();
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: no DT_DEBUG found in %s -- return now\n",
+ exec_bfd->filename);
+ return svr4_default_sos ();
+ }
}
/* Walk the inferior's link map list, and build our list of
`struct so_list' nodes. */
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: walk link map in %s\n",
+ exec_bfd->filename);
lm = solib_svr4_r_map ();
while (lm)
@@ -742,23 +826,103 @@ svr4_current_sos (void)
new->lm_info->lm = xzalloc (lmo->link_map_size);
make_cleanup (xfree, new->lm_info->lm);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: read lm at 0x%s\n", paddr_nz(lm));
read_memory (lm, new->lm_info->lm, lmo->link_map_size);
lm = LM_NEXT (new);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: is first link entry? %d\n",
+ IGNORE_FIRST_LINK_MAP_ENTRY (new));
+
/* For SVR4 versions, the first entry in the link map is for the
inferior executable, so we must ignore it. For some versions of
SVR4, it has no name. For others (Solaris 2.3 for example), it
does have a name, so we can no longer use a missing name to
decide when to ignore it. */
if (IGNORE_FIRST_LINK_MAP_ENTRY (new) && ldsomap == 0)
- free_so (new);
+ {
+ /* It is the first link map entry, i.e. it is the main executable. */
+
+ if (bfd_get_start_address (exec_bfd) == entry_point_address ())
+ {
+ /* Non-pie case, main executable has not been relocated. */
+ free_so (new);
+ }
+ else
+ {
+ /* Pie case, main executable has been relocated. */
+ struct so_list *gdb_solib;
+
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: Processing first link map entry\n");
+ strncpy (new->so_name, exec_bfd->filename,
+ SO_NAME_MAX_PATH_SIZE - 1);
+ new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
+ strcpy (new->so_original_name, new->so_name);
+ /*new->main = 1;*/
+ new->main_relocated = 0;
+
+ if (debug_solib)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: Processing nameless DSO\n");
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: adding name %s\n",
+ new->so_name);
+ }
+
+ for (gdb_solib = master_so_list ();
+ gdb_solib;
+ gdb_solib = gdb_solib->next)
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: compare gdb %s and new %s\n",
+ gdb_solib->so_name, new->so_name);
+ if (strcmp (gdb_solib->so_name, new->so_name) == 0)
+ if (gdb_solib->main_relocated)
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: found main relocated\n");
+ break;
+ }
+ }
+
+ if ((gdb_solib && !gdb_solib->main_relocated) || (!gdb_solib))
+ {
+ add_to_target_sections (0 /*from_tty*/, &current_target, new);
+ new->main = 1;
+ }
+
+ /* We need this in the list of shared libs we return because
+ solib_add_stub will loop through it and add the symbol file. */
+ new->next = 0;
+ *link_ptr = new;
+ link_ptr = &new->next;
+ }
+ } /* End of IGNORE_FIRST_LINK_MAP_ENTRY */
else
{
+ /* This is not the first link map entry, i.e. is not the main
+ executable. Note however that it could be the DSO supplied on
+ certain systems (i.e. Linux 2.6) containing information about
+ the vsyscall page. We must ignore such entry. This entry is
+ nameless (just like the one for the main executable, sigh). */
+
int errcode;
char *buffer;
/* Extract this shared object's name. */
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: read LM_NAME\n");
+
target_read_string (LM_NAME (new), &buffer,
SO_NAME_MAX_PATH_SIZE - 1, &errcode);
if (errcode != 0)
@@ -766,22 +930,37 @@ svr4_current_sos (void)
safe_strerror (errcode));
else
{
- strncpy (new->so_name, buffer, SO_NAME_MAX_PATH_SIZE - 1);
- new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
- xfree (buffer);
- strcpy (new->so_original_name, new->so_name);
- }
-
- /* If this entry has no name, or its name matches the name
- for the main executable, don't include it in the list. */
- if (! new->so_name[0]
- || match_main (new->so_name))
- free_so (new);
- else
- {
- new->next = 0;
- *link_ptr = new;
- link_ptr = &new->next;
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: LM_NAME is <%s>\n",
+ buffer);
+ /* The name could be empty, in which case it is the
+ system supplied DSO. */
+ if (strcmp (buffer, "") == 0)
+ {
+ xfree (buffer);
+ free_so (new);
+ }
+ else
+ {
+ strncpy (new->so_name, buffer, SO_NAME_MAX_PATH_SIZE - 1);
+ new->so_name[SO_NAME_MAX_PATH_SIZE - 1] = '\0';
+ xfree (buffer);
+ strcpy (new->so_original_name, new->so_name);
+ if (debug_solib)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: Processing DSO: %s\n",
+ new->so_name);
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: first link entry %d\n",
+ IGNORE_FIRST_LINK_MAP_ENTRY (new));
+ }
+
+ new->next = 0;
+ *link_ptr = new;
+ link_ptr = &new->next;
+ }
}
}
@@ -798,6 +977,11 @@ svr4_current_sos (void)
if (head == NULL)
return svr4_default_sos ();
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_current_sos: ENDS %s\n",
+ exec_bfd->filename);
+
return head;
}
@@ -874,7 +1058,7 @@ svr4_fetch_objfile_link_map (struct objf
/* On some systems, the only way to recognize the link map entry for
the main executable file is by looking at its name. Return
non-zero iff SONAME matches one of the known main executable names. */
-
+#if 0
static int
match_main (char *soname)
{
@@ -888,6 +1072,7 @@ match_main (char *soname)
return (0);
}
+#endif
/* Return 1 if PC lies in the dynamic symbol resolution code of the
SVR4 run time loader. */
@@ -987,6 +1172,11 @@ enable_break (void)
/* Find the .interp section; if not found, warn the user and drop
into the old breakpoint at symbol code. */
interp_sect = bfd_get_section_by_name (exec_bfd, ".interp");
+
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "enable_break: search for .interp in %s\n",
+ exec_bfd->filename);
if (interp_sect)
{
unsigned int interp_sect_size;
@@ -1025,6 +1215,9 @@ enable_break (void)
if (tmp_fd >= 0)
tmp_bfd = bfd_fopen (tmp_pathname, gnutarget, FOPEN_RB, tmp_fd);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "enable_break: opening %s\n", tmp_pathname);
if (tmp_bfd == NULL)
goto bkpt_at_symbol;
@@ -1111,6 +1304,9 @@ enable_break (void)
if (sym_addr != 0)
{
create_solib_event_breakpoint (load_addr + sym_addr);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "enable_break: solib bp set\n");
return 1;
}
@@ -1372,6 +1568,8 @@ svr4_solib_create_inferior_hook (void)
while (stop_signal != TARGET_SIGNAL_TRAP);
stop_soon = NO_STOP_QUIETLY;
#endif /* defined(_SCO_DS) */
+
+ disable_breakpoints_at_startup (1);
}
static void
@@ -1558,6 +1756,75 @@ svr4_lp64_fetch_link_map_offsets (void)
return lmp;
}
+void
+info_linkmap_command (char *cmd, int from_tty)
+{
+ CORE_ADDR lm;
+
+ /* Make sure we've looked up the inferior's dynamic linker's base
+ structure. */
+ if (! debug_base)
+ {
+ debug_base = locate_base ();
+
+ /* If we can't find the dynamic linker's base structure, this
+ must not be a dynamically linked executable. Hmm. */
+ if (! debug_base)
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_print_linkmap: no DT_DEBUG found in %s -- return now\n",
+ exec_bfd->filename);
+ return;
+ }
+ }
+
+ /* Walk the inferior's link map list, and print the info. */
+
+ lm = solib_svr4_r_map ();
+ while (lm)
+ {
+ int errcode;
+ char *buffer;
+ CORE_ADDR load_addr;
+
+ struct link_map_offsets *lmo = svr4_fetch_link_map_offsets ();
+ struct so_list *new
+ = (struct so_list *) xmalloc (sizeof (struct so_list));
+ struct cleanup *old_chain = make_cleanup (xfree, new);
+
+ memset (new, 0, sizeof (*new));
+
+ new->lm_info = xmalloc (sizeof (struct lm_info));
+ make_cleanup (xfree, new->lm_info);
+
+ new->lm_info->lm = xmalloc (lmo->link_map_size);
+ make_cleanup (xfree, new->lm_info->lm);
+ memset (new->lm_info->lm, 0, lmo->link_map_size);
+
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "svr4_print_linkmap: read lm at 0x%s\n", paddr_nz(lm));
+ read_memory (lm, new->lm_info->lm, lmo->link_map_size);
+
+ lm = LM_NEXT (new);
+
+ /* Load address. */
+ load_addr = LM_ADDR_CHECK (new, NULL);
+ /* Shared object's name. */
+ target_read_string (LM_NAME (new), &buffer,
+ SO_NAME_MAX_PATH_SIZE - 1, &errcode);
+ make_cleanup (xfree, buffer);
+ if (errcode != 0)
+ {
+ warning ("svr4_print_linkmap: Can't read pathname for load map: %s\n",
+ safe_strerror (errcode));
+ }
+ fprintf_filtered (gdb_stdout, "%-8s %-30s\n", paddr(load_addr), buffer);
+ do_cleanups (old_chain);
+ }
+}
+
static struct target_so_ops svr4_so_ops;
@@ -1580,4 +1847,8 @@ _initialize_svr4_solib (void)
/* FIXME: Don't do this here. *_gdbarch_init() should set so_ops. */
current_target_so_ops = &svr4_so_ops;
+
+ add_info ("linkmap", info_linkmap_command,
+ "Display the inferior's linkmap.");
+
}
Index: gdb-6.6/gdb/varobj.c
===================================================================
--- gdb-6.6.orig/gdb/varobj.c
+++ gdb-6.6/gdb/varobj.c
@@ -870,6 +870,62 @@ varobj_list (struct varobj ***varlist)
return rootcount;
}
+void
+varobj_refresh (void)
+{
+ struct varobj *var;
+ struct varobj_root *croot;
+ int mycount = rootcount;
+ char * name;
+
+ croot = rootlist;
+ while ((croot != NULL) && (mycount > 0))
+ {
+ var = croot->rootvar;
+
+ /* Get rid of the memory for the old expression. This also
+ leaves var->root->exp == NULL, which is ok for the parsing
+ below. */
+ free_current_contents (&var->root->exp);
+
+ value_free (var->value);
+ var->type = NULL;
+
+ name = xstrdup (var->name);
+
+ /* Reparse the expression. Wrap the call to parse expression,
+ so we can return a sensible error. */
+ if (!gdb_parse_exp_1 (&name, var->root->valid_block, 0, &var->root->exp))
+ {
+ return;
+ }
+
+ /* We definitively need to catch errors here.
+ If evaluate_expression succeeds we got the value we wanted.
+ But if it fails, we still go on with a call to evaluate_type() */
+ if (gdb_evaluate_expression (var->root->exp, &var->value))
+ {
+ /* no error */
+ release_value (var->value);
+ if (value_lazy (var->value))
+ gdb_value_fetch_lazy (var->value);
+ }
+ else
+ var->value = evaluate_type (var->root->exp);
+
+ var->type = value_type (var->value);
+
+ mycount--;
+ croot = croot->next;
+ }
+
+ if (mycount || (croot != NULL))
+ warning
+ ("varobj_refresh: assertion failed - wrong tally of root vars (%d:%d)",
+ rootcount, mycount);
+}
+
+
/* Update the values for a variable and its children. This is a
two-pronged attack. First, re-parse the value for the root's
expression to see if it's changed. Then go all the way
Index: gdb-6.6/gdb/solist.h
===================================================================
--- gdb-6.6.orig/gdb/solist.h
+++ gdb-6.6/gdb/solist.h
@@ -62,6 +62,8 @@ struct so_list
bfd *abfd;
char symbols_loaded; /* flag: symbols read in yet? */
char from_tty; /* flag: print msgs? */
+ char main; /* flag: is this the main executable? */
+ char main_relocated; /* flag: has it been relocated yet? */
struct objfile *objfile; /* objfile for loaded lib */
struct section_table *sections;
struct section_table *sections_end;
@@ -113,9 +115,15 @@ void free_so (struct so_list *so);
/* Return address of first so_list entry in master shared object list. */
struct so_list *master_so_list (void);
+/* Return address of first so_list entry in master shared object list. */
+struct so_list *master_so_list (void);
+
/* Find solib binary file and open it. */
extern int solib_open (char *in_pathname, char **found_pathname);
+/* Add the list of sections in so_list to the target to_sections. */
+extern void add_to_target_sections (int, struct target_ops *, struct so_list *);
+
/* FIXME: gdbarch needs to control this variable */
extern struct target_so_ops *current_target_so_ops;
@@ -126,4 +134,6 @@ extern struct target_so_ops *current_tar
#define TARGET_SO_IN_DYNSYM_RESOLVE_CODE \
(current_target_so_ops->in_dynsym_resolve_code)
+/* Controls the printing of debugging output. */
+extern int debug_solib;
#endif
Index: gdb-6.6/gdb/varobj.h
===================================================================
--- gdb-6.6.orig/gdb/varobj.h
+++ gdb-6.6/gdb/varobj.h
@@ -99,4 +99,6 @@ extern int varobj_list (struct varobj **
extern int varobj_update (struct varobj **varp, struct varobj ***changelist);
+extern void varobj_refresh(void);
+
#endif /* VAROBJ_H */
Index: gdb-6.6/gdb/symfile.c
===================================================================
--- gdb-6.6.orig/gdb/symfile.c
+++ gdb-6.6/gdb/symfile.c
@@ -49,6 +49,7 @@
#include "readline/readline.h"
#include "gdb_assert.h"
#include "block.h"
+#include "varobj.h"
#include "observer.h"
#include "exec.h"
#include "parser-defs.h"
@@ -659,7 +660,7 @@ syms_from_objfile (struct objfile *objfi
/* Now either addrs or offsets is non-zero. */
- if (mainline)
+ if (mainline == 1)
{
/* We will modify the main symbol table, make sure that all its users
will be cleaned up if an error occurs during symbol reading. */
@@ -687,7 +688,7 @@ syms_from_objfile (struct objfile *objfi
We no longer warn if the lowest section is not a text segment (as
happens for the PA64 port. */
- if (!mainline && addrs && addrs->other[0].name)
+ if (/*!mainline &&*/ addrs && addrs->other[0].name)
{
asection *lower_sect;
asection *sect;
@@ -856,17 +857,21 @@ new_symfile_objfile (struct objfile *obj
/* If this is the main symbol file we have to clean up all users of the
old main symbol file. Otherwise it is sufficient to fixup all the
breakpoints that may have been redefined by this symbol file. */
- if (mainline)
+ if (mainline == 1)
{
/* OK, make it the "real" symbol file. */
symfile_objfile = objfile;
clear_symtab_users ();
}
- else
+ else if (mainline == 0)
{
breakpoint_re_set ();
}
+ else
+ {
+ /* Don't reset breakpoints or it will screw up PIE. */
+ }
/* We're done reading the symbol file; finish off complaints. */
clear_complaints (&symfile_complaints, 0, verbo);
@@ -909,7 +914,7 @@ symbol_file_add_with_addrs_or_offsets (b
interactively wiping out any existing symbols. */
if ((have_full_symbols () || have_partial_symbols ())
- && mainline
+ && (mainline == 1)
&& from_tty
&& !query ("Load new symbol table from \"%s\"? ", name))
error (_("Not confirmed."));
@@ -1090,6 +1095,10 @@ symbol_file_clear (int from_tty)
symfile_objfile->name)
: !query (_("Discard symbol table? "))))
error (_("Not confirmed."));
+#ifdef CLEAR_SOLIB
+ CLEAR_SOLIB ();
+#endif
+
free_all_objfiles ();
/* solib descriptors may have handles to objfiles. Since their
@@ -2204,6 +2213,8 @@ reread_symbols (void)
/* Discard cleanups as symbol reading was successful. */
discard_cleanups (old_cleanups);
+ init_entry_point_info (objfile);
+
/* If the mtime has changed between the time we set new_modtime
and now, we *want* this to be out of date, so don't call stat
again now. */
@@ -2579,6 +2590,7 @@ clear_symtab_users (void)
clear_pc_function_cache ();
if (deprecated_target_new_objfile_hook)
deprecated_target_new_objfile_hook (NULL);
+ varobj_refresh ();
/* Clear globals which might have pointed into a removed objfile.
FIXME: It's not clear which of these are supposed to persist
Index: gdb-6.6/gdb/breakpoint.c
===================================================================
--- gdb-6.6.orig/gdb/breakpoint.c
+++ gdb-6.6/gdb/breakpoint.c
@@ -781,15 +781,15 @@ insert_watchpoints_for_new_thread (ptid_
struct value *v = b->owner->val_chain;
/* Look at each value on the value chain. */
- for (; v; v = v->next)
+ for (; v; v = value_next (v))
{
/* If it's a memory location, and GDB actually needed
its contents to evaluate the expression, then we
must watch it. */
if (VALUE_LVAL (v) == lval_memory
- && ! VALUE_LAZY (v))
+ && ! value_lazy (v))
{
- struct type *vtype = check_typedef (VALUE_TYPE (v));
+ struct type *vtype = check_typedef (value_type (v));
/* We only watch structs and arrays if user asked
for it explicitly, never if they just happen to
@@ -801,8 +801,8 @@ insert_watchpoints_for_new_thread (ptid_
CORE_ADDR addr;
int len, type;
- addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
- len = TYPE_LENGTH (VALUE_TYPE (v));
+ addr = VALUE_ADDRESS (v) + value_offset (v);
+ len = TYPE_LENGTH (value_type (v));
type = hw_write;
if (b->owner->type == bp_read_watchpoint)
type = hw_read;
@@ -2682,12 +2682,12 @@ mark_triggered_watchpoints (CORE_ADDR st
|| b->type == bp_read_watchpoint
|| b->type == bp_access_watchpoint)
{
- for (v = b->val_chain; v; v = v->next)
+ for (v = b->val_chain; v; v = value_next (v))
{
if (VALUE_LVAL (v) == lval_memory
- && ! VALUE_LAZY (v))
+ && ! value_lazy (v))
{
- struct type *vtype = check_typedef (VALUE_TYPE (v));
+ struct type *vtype = check_typedef (value_type (v));
if (v == b->val_chain
|| (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
@@ -2695,11 +2695,11 @@ mark_triggered_watchpoints (CORE_ADDR st
{
CORE_ADDR vaddr;
- vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
+ vaddr = VALUE_ADDRESS (v) + value_offset (v);
/* Exact match not required. Within range is
sufficient. */
if (addr >= vaddr &&
- addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
+ addr < vaddr + TYPE_LENGTH (value_type (v)))
b->watchpoint_triggered = 1;
}
}
@@ -2869,12 +2869,12 @@ bpstat_stop_status (CORE_ADDR bp_addr, p
bs->stop = 0;
continue;
}
- for (v = b->val_chain; v; v = v->next)
+ for (v = b->val_chain; v; v = value_next (v))
{
if (VALUE_LVAL (v) == lval_memory
- && ! VALUE_LAZY (v))
+ && ! value_lazy (v))
{
- struct type *vtype = check_typedef (VALUE_TYPE (v));
+ struct type *vtype = check_typedef (value_type (v));
if (v == b->val_chain
|| (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
@@ -2882,11 +2882,11 @@ bpstat_stop_status (CORE_ADDR bp_addr, p
{
CORE_ADDR vaddr;
- vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
+ vaddr = VALUE_ADDRESS (v) + value_offset (v);
/* Exact match not required. Within range is
sufficient. */
if (addr >= vaddr &&
- addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
+ addr < vaddr + TYPE_LENGTH (value_type (v)))
must_check_value = 1;
}
}
@@ -3937,6 +3937,7 @@ describe_other_breakpoints (CORE_ADDR pc
printf_filtered ("%s%s ",
((b->enable_state == bp_disabled ||
b->enable_state == bp_shlib_disabled ||
+ b->enable_state == bp_startup_disabled ||
b->enable_state == bp_call_disabled)
? " (disabled)"
: b->enable_state == bp_permanent
@@ -4615,6 +4616,62 @@ re_enable_breakpoints_in_shlibs (void)
}
}
+void
+disable_breakpoints_at_startup (int silent)
+{
+ struct breakpoint *b;
+ int disabled_startup_breaks = 0;
+
+ if (bfd_get_start_address (exec_bfd) != entry_point_address ())
+ {
+ ALL_BREAKPOINTS (b)
+ {
+ if (((b->type == bp_breakpoint) ||
+ (b->type == bp_hardware_breakpoint)) &&
+ b->enable_state == bp_enabled &&
+ !b->loc->duplicate)
+ {
+ b->enable_state = bp_startup_disabled;
+ if (!silent)
+ {
+ if (!disabled_startup_breaks)
+ {
+ target_terminal_ours_for_output ();
+ warning ("Temporarily disabling breakpoints:");
+ }
+ disabled_startup_breaks = 1;
+ warning ("breakpoint #%d addr 0x%s", b->number, paddr_nz(b->loc->address));
+ }
+ }
+ }
+ }
+}
+
+/* Try to reenable any breakpoints after startup. */
+void
+re_enable_breakpoints_at_startup (void)
+{
+ struct breakpoint *b;
+
+ if (bfd_get_start_address (exec_bfd) != entry_point_address ())
+ {
+ ALL_BREAKPOINTS (b)
+ if (b->enable_state == bp_startup_disabled)
+ {
+ char buf[1];
+
+ /* Do not reenable the breakpoint if the shared library
+ is still not mapped in. */
+ if (target_read_memory (b->loc->address, buf, 1) == 0)
+ {
+ /*printf ("enabling breakpoint at 0x%s\n", paddr_nz(b->loc->address));*/
+ b->enable_state = bp_enabled;
+ }
+ }
+ }
+}
+
+
static void
solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
char *cond_string, enum bptype bp_kind)
@@ -6961,6 +7018,7 @@ delete_breakpoint (struct breakpoint *bp
&& !b->loc->duplicate
&& b->enable_state != bp_disabled
&& b->enable_state != bp_shlib_disabled
+ && b->enable_state != bp_startup_disabled
&& !b->pending
&& b->enable_state != bp_call_disabled)
{
@@ -7176,7 +7234,8 @@ breakpoint_re_set_one (void *bint)
break;
save_enable = b->enable_state;
- if (b->enable_state != bp_shlib_disabled)
+ if (b->enable_state != bp_shlib_disabled
+ || b->enable_state != bp_shlib_disabled)
b->enable_state = bp_disabled;
else
/* If resetting a shlib-disabled breakpoint, we don't want to
Index: gdb-6.6/gdb/solib.c
===================================================================
--- gdb-6.6.orig/gdb/solib.c
+++ gdb-6.6/gdb/solib.c
@@ -72,6 +72,8 @@ solib_ops (struct gdbarch *gdbarch)
/* external data declarations */
+int debug_solib;
+
/* FIXME: gdbarch needs to control this variable */
struct target_so_ops *current_target_so_ops;
@@ -102,6 +104,8 @@ The search path for loading non-absolute
value);
}
+void add_to_target_sections (int, struct target_ops *, struct so_list *);
+
/*
GLOBAL FUNCTION
@@ -376,7 +380,6 @@ free_so (struct so_list *so)
xfree (so);
}
-
/* Return address of first so_list entry in master shared object list. */
struct so_list *
master_so_list (void)
@@ -384,7 +387,6 @@ master_so_list (void)
return so_list_head;
}
-
/* A small stub to get us past the arg-passing pinhole of catch_errors. */
static int
@@ -396,15 +398,40 @@ symbol_add_stub (void *arg)
/* Have we already loaded this shared object? */
ALL_OBJFILES (so->objfile)
{
- if (strcmp (so->objfile->name, so->so_name) == 0)
+ /* Found an already loaded shared library. */
+ if (strcmp (so->objfile->name, so->so_name) == 0
+ && !so->main)
return 1;
+ /* Found an already loaded main executable. This could happen in
+ two circumstances.
+ First case: the main file has already been read in
+ as the first thing that gdb does at startup, and the file
+ hasn't been relocated properly yet. Therefor we need to read
+ it in with the proper section info.
+ Second case: it has been read in with the correct relocation,
+ and therefore we need to skip it. */
+ if (strcmp (so->objfile->name, so->so_name) == 0
+ && so->main
+ && so->main_relocated)
+ return 1;
}
sap = build_section_addr_info_from_section_table (so->sections,
so->sections_end);
- so->objfile = symbol_file_add (so->so_name, so->from_tty,
- sap, 0, OBJF_SHARED);
+ if (so->main)
+ {
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "symbol_add_stub: adding symbols for main\n");
+ so->objfile = symbol_file_add (so->so_name, /*so->from_tty*/ 0,
+ sap, 1, 0);
+ so->main_relocated = 1;
+ }
+ else
+ so->objfile = symbol_file_add (so->so_name, so->from_tty,
+ sap, 0, OBJF_SHARED);
+
free_section_addr_info (sap);
return (1);
@@ -532,6 +559,10 @@ update_solib_list (int from_tty, struct
the inferior's current list. */
while (i)
{
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "update_solib_list: compare gdb:%s and inferior:%s\n",
+ gdb->so_original_name, i->so_original_name);
if (! strcmp (gdb->so_original_name, i->so_original_name))
break;
@@ -585,28 +616,7 @@ update_solib_list (int from_tty, struct
/* Fill in the rest of each of the `struct so_list' nodes. */
for (i = inferior; i; i = i->next)
{
- i->from_tty = from_tty;
-
- /* Fill in the rest of the `struct so_list' node. */
- catch_errors (solib_map_sections, i,
- "Error while mapping shared library sections:\n",
- RETURN_MASK_ALL);
-
- /* If requested, add the shared object's sections to the TARGET's
- section table. Do this immediately after mapping the object so
- that later nodes in the list can query this object, as is needed
- in solib-osf.c. */
- if (target)
- {
- int count = (i->sections_end - i->sections);
- if (count > 0)
- {
- int space = target_resize_to_sections (target, count);
- memcpy (target->to_sections + space,
- i->sections,
- count * sizeof (i->sections[0]));
- }
- }
+ add_to_target_sections (from_tty, target, i);
/* Notify any observer that the shared object has been
loaded now that we've added it to GDB's tables. */
@@ -702,6 +712,41 @@ solib_add (char *pattern, int from_tty,
}
}
+void
+add_to_target_sections (int from_tty, struct target_ops *target, struct so_list *solib)
+{
+ /* If this is set, then the sections have been already added to the
+ target list. */
+ if (solib->main)
+ return;
+
+ solib->from_tty = from_tty;
+
+ /* Fill in the rest of the `struct so_list' node. */
+ catch_errors (solib_map_sections, solib,
+ "Error while mapping shared library sections:\n",
+ RETURN_MASK_ALL);
+
+ /* If requested, add the shared object's sections to the TARGET's
+ section table. Do this immediately after mapping the object so
+ that later nodes in the list can query this object, as is needed
+ in solib-osf.c. */
+ if (target)
+ {
+ int count = (solib->sections_end - solib->sections);
+ if (count > 0)
+ {
+ int space = target_resize_to_sections (target, count);
+ if (debug_solib)
+ fprintf_unfiltered (gdb_stdlog,
+ "add_to_target_sections: add %s to to_sections\n",
+ solib->so_original_name);
+ memcpy (target->to_sections + space,
+ solib->sections,
+ count * sizeof (solib->sections[0]));
+ }
+ }
+}
/*
@@ -1006,4 +1051,12 @@ This takes precedence over the environme
reload_shared_libraries,
show_solib_search_path,
&setlist, &showlist);
+
+ add_setshow_boolean_cmd ("solib", no_class, &debug_solib,
+ _("\
+Set debugging of GNU/Linux shlib module.\n"), _("\
+Show debugging status of GNU/Linux shlib module.\n"), _("\
+Enables printf debugging output of GNU/Linux shlib module.\n"),
+ NULL, NULL,
+ &setdebuglist, &showdebuglist);
}
Index: gdb-6.6/gdb/elfread.c
===================================================================
--- gdb-6.6.orig/gdb/elfread.c
+++ gdb-6.6/gdb/elfread.c
@@ -556,7 +556,7 @@ elf_symfile_read (struct objfile *objfil
/* If we are reinitializing, or if we have never loaded syms yet,
set table to empty. MAINLINE is cleared so that *_read_psymtab
functions do not all also re-initialize the psymbol table. */
- if (mainline)
+ if (mainline == 1)
{
init_psymbol_list (objfile, 0);
mainline = 0;
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