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gdb-7.6.patch
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# When this file is updated in an existing source tree, it gets re-applied
# during the next build using "patch -N --fuzz=0", which ignores patches
# that have already been applied. However, if a gdb file has been modified
# multiple times, the subsequent patching may fail to recognize that a
# given patch has been previously applied, and will attempt to re-apply it.
# To prevent any uninintended consequences, this file also acts as a
# shell script that can restore any gdb file to its original state prior
# to all subsequent patch applications.
# The gdb-7.6-ppc64le-support.patch will have modified both files below
# during the initial build, so continue previous behavior.
if [ "$1" = "PPC64" ]
then
exit 0
fi
tar xvzmf gdb-7.6.tar.gz \
gdb-7.6/gdb/symtab.c \
gdb-7.6/gdb/printcmd.c
exit 0
--- gdb-7.6/libiberty/Makefile.in.orig
+++ gdb-7.6/libiberty/Makefile.in
@@ -175,6 +175,7 @@ REQUIRED_OFILES = \
./getruntime.$(objext) ./hashtab.$(objext) ./hex.$(objext) \
./lbasename.$(objext) ./lrealpath.$(objext) \
./make-relative-prefix.$(objext) ./make-temp-file.$(objext) \
+ ./mkstemps.$(objext) \
./objalloc.$(objext) \
./obstack.$(objext) \
./partition.$(objext) ./pexecute.$(objext) ./physmem.$(objext) \
@@ -206,7 +207,7 @@ CONFIGURED_OFILES = ./asprintf.$(objext)
./index.$(objext) ./insque.$(objext) \
./memchr.$(objext) ./memcmp.$(objext) ./memcpy.$(objext) \
./memmem.$(objext) ./memmove.$(objext) \
- ./mempcpy.$(objext) ./memset.$(objext) ./mkstemps.$(objext) \
+ ./mempcpy.$(objext) ./memset.$(objext) \
./pex-djgpp.$(objext) ./pex-msdos.$(objext) \
./pex-unix.$(objext) ./pex-win32.$(objext) \
./putenv.$(objext) \
--- gdb-7.6/opcodes/i386-dis.c.orig
+++ gdb-7.6/opcodes/i386-dis.c
@@ -11510,6 +11510,10 @@ print_insn (bfd_vma pc, disassemble_info
threebyte = *++codep;
dp = &dis386_twobyte[threebyte];
need_modrm = twobyte_has_modrm[*codep];
+ if (dp->name && ((strcmp(dp->name, "ud2a") == 0) || (strcmp(dp->name, "ud2") == 0))) {
+ extern int kernel_BUG_encoding_bytes(void);
+ codep += kernel_BUG_encoding_bytes();
+ }
codep++;
}
else
--- gdb-7.6/gdb/dwarf2read.c.orig
+++ gdb-7.6/gdb/dwarf2read.c
@@ -2670,7 +2670,11 @@ read_index_from_section (struct objfile
indices. */
if (version < 4)
{
+#ifdef CRASH_MERGE
+ static int warning_printed = 1;
+#else
static int warning_printed = 0;
+#endif
if (!warning_printed)
{
warning (_("Skipping obsolete .gdb_index section in %s."),
@@ -2689,7 +2693,11 @@ read_index_from_section (struct objfile
"set use-deprecated-index-sections on". */
if (version < 6 && !deprecated_ok)
{
+#ifdef CRASH_MERGE
+ static int warning_printed = 1;
+#else
static int warning_printed = 0;
+#endif
if (!warning_printed)
{
warning (_("\
--- gdb-7.6/gdb/amd64-linux-nat.c.orig
+++ gdb-7.6/gdb/amd64-linux-nat.c
@@ -45,6 +45,17 @@
/* ezannoni-2003-07-09: I think this is fixed. The extraneous defs have
been removed from ptrace.h in the kernel. However, better safe than
sorry. */
+#ifdef CRASH_MERGE
+/*
+ * When compiling within a 2.6.25-based Fedora build environment with
+ * gcc 4.3, four new "typedef unsigned int u32;" declarations were
+ * required due to a new ptrace_bts_config structure declaration in
+ * "asm-x86/ptrace-abi.h" that used u32 members, but u32 is defined in
+ * "asm-x86/types.h" within a __KERNEL__ section. They've been changed
+ * to __u32, but this patch remains for building in that environment.
+ */
+typedef unsigned int u32;
+#endif
#include <asm/ptrace.h>
#include <sys/reg.h>
#include "gdb_proc_service.h"
--- gdb-7.6/gdb/symfile.c.orig
+++ gdb-7.6/gdb/symfile.c
@@ -693,7 +693,26 @@ default_symfile_offsets (struct objfile
for (cur_sec = abfd->sections; cur_sec != NULL; cur_sec = cur_sec->next)
/* We do not expect this to happen; just skip this step if the
relocatable file has a section with an assigned VMA. */
- if (bfd_section_vma (abfd, cur_sec) != 0)
+ if (bfd_section_vma (abfd, cur_sec) != 0
+ /*
+ * Kernel modules may have some non-zero VMAs, i.e., like the
+ * __ksymtab and __ksymtab_gpl sections in this example:
+ *
+ * Section Headers:
+ * [Nr] Name Type Address Offset
+ * Size EntSize Flags Link Info Align
+ * ...
+ * [ 8] __ksymtab PROGBITS 0000000000000060 0000ad90
+ * 0000000000000010 0000000000000000 A 0 0 16
+ * [ 9] .rela__ksymtab RELA 0000000000000000 0000ada0
+ * 0000000000000030 0000000000000018 43 8 8
+ * [10] __ksymtab_gpl PROGBITS 0000000000000070 0000add0
+ * 00000000000001a0 0000000000000000 A 0 0 16
+ * ...
+ *
+ * but they should be treated as if they are NULL.
+ */
+ && strncmp (bfd_get_section_name (abfd, cur_sec), "__k", 3) != 0)
break;
if (cur_sec == NULL)
@@ -1122,6 +1141,12 @@ symbol_file_add_with_addrs_or_offsets (b
error (_("Not confirmed."));
objfile = allocate_objfile (abfd, flags | (mainline ? OBJF_MAINLINE : 0));
+#ifdef CRASH_MERGE
+ if (add_flags & SYMFILE_MAINLINE) {
+ extern struct objfile *gdb_kernel_objfile;
+ gdb_kernel_objfile = objfile;
+ }
+#endif
if (parent)
add_separate_debug_objfile (objfile, parent);
@@ -1484,6 +1509,9 @@ find_separate_debug_file (const char *di
VEC (char_ptr) *debugdir_vec;
struct cleanup *back_to;
int ix;
+#ifdef CRASH_MERGE
+ extern int check_specified_module_tree(char *, char *);
+#endif
/* Set I to max (strlen (canon_dir), strlen (dir)). */
i = strlen (dir);
@@ -1513,6 +1541,15 @@ find_separate_debug_file (const char *di
if (separate_debug_file_exists (debugfile, crc32, objfile))
return debugfile;
+#ifdef CRASH_MERGE
+{
+ if (check_specified_module_tree(objfile->name, debugfile) &&
+ separate_debug_file_exists(debugfile, crc32, objfile)) {
+ return debugfile;
+ }
+}
+#endif
+
/* Then try in the global debugfile directories.
Keep backward compatibility so that DEBUG_FILE_DIRECTORY being "" will
@@ -1583,6 +1620,10 @@ find_separate_debug_file_by_debuglink (s
char *debugfile;
unsigned long crc32;
struct cleanup *cleanups;
+#ifdef CRASH_MERGE
+ char *name_copy;
+ extern char *check_specified_kernel_debug_file();
+#endif
debuglink = get_debug_link_info (objfile, &crc32);
@@ -1635,6 +1676,12 @@ find_separate_debug_file_by_debuglink (s
}
do_cleanups (cleanups);
+#ifdef CRASH_MERGE
+ if (debugfile == NULL) {
+ name_copy = check_specified_kernel_debug_file();
+ return (name_copy ? xstrdup(name_copy) : NULL);
+ }
+#endif
return debugfile;
}
@@ -2409,8 +2456,10 @@ add_symbol_file_command (char *args, int
so we can't determine what section names are valid. */
}
+#ifndef CRASH_MERGE
if (from_tty && (!query ("%s", "")))
error (_("Not confirmed."));
+#endif
symbol_file_add (filename, from_tty ? SYMFILE_VERBOSE : 0,
section_addrs, flags);
@@ -3690,6 +3739,15 @@ bfd_byte *
symfile_relocate_debug_section (struct objfile *objfile,
asection *sectp, bfd_byte *buf)
{
+#ifdef CRASH_MERGE
+ /* Executable files have all the relocations already resolved.
+ * Handle files linked with --emit-relocs.
+ * http://sources.redhat.com/ml/gdb/2006-08/msg00137.html
+ */
+ bfd *abfd = objfile->obfd;
+ if ((abfd->flags & EXEC_P) != 0)
+ return NULL;
+#endif
gdb_assert (objfile->sf->sym_relocate);
return (*objfile->sf->sym_relocate) (objfile, sectp, buf);
--- gdb-7.6/gdb/cli/cli-cmds.c.orig
+++ gdb-7.6/gdb/cli/cli-cmds.c
@@ -466,6 +466,10 @@ show_script_ext_mode (struct ui_file *fi
If SEARCH_PATH is non-zero, and the file isn't found in cwd,
search for it in the source search path. */
+#ifdef CRASH_MERGE
+static int crash_from_tty = 0;
+#endif
+
int
find_and_open_script (const char *script_file, int search_path,
FILE **streamp, char **full_pathp)
@@ -508,6 +512,32 @@ find_and_open_script (const char *script
return 0;
}
+#ifdef CRASH_MERGE
+ /*
+ * Only allow trusted versions of .gdbinit files to be
+ * sourced during session initialization.
+ */
+ if (crash_from_tty == -1)
+ {
+ struct stat statbuf;
+ FILE *stream = *streamp;
+ int fd = fileno (stream);
+ if (fstat (fd, &statbuf) < 0)
+ {
+ perror_with_name (*full_pathp);
+ fclose (stream);
+ return 0;
+ }
+ if (statbuf.st_uid != getuid () || (statbuf.st_mode & S_IWOTH))
+ {
+ extern void untrusted_file(FILE *, char *);
+ untrusted_file(NULL, *full_pathp);
+ fclose (stream);
+ return 0;
+ }
+ }
+#endif
+
return 1;
}
@@ -566,7 +596,11 @@ source_script_with_search (const char *f
If the source command was invoked interactively, throw an
error. Otherwise (e.g. if it was invoked by a script),
silently ignore the error. */
+#ifdef CRASH_MERGE
+ if (from_tty > 0)
+#else
if (from_tty)
+#endif
perror_with_name (file);
else
return;
@@ -589,7 +623,14 @@ source_script_with_search (const char *f
void
source_script (char *file, int from_tty)
{
+#ifdef CRASH_MERGE
+ crash_from_tty = from_tty;
+#endif
source_script_with_search (file, from_tty, 0);
+#ifdef CRASH_MERGE
+ crash_from_tty = 0;
+#endif
+
}
/* Return the source_verbose global variable to its previous state
--- gdb-7.6/gdb/psymtab.c.orig
+++ gdb-7.6/gdb/psymtab.c
@@ -305,10 +305,14 @@ find_pc_sect_psymtab (struct objfile *ob
struct minimal_symbol *msymbol)
{
struct partial_symtab *pst;
+#ifdef CRASH_MERGE
+ extern int gdb_line_number_callback(unsigned long, unsigned long, unsigned long);
+#endif
/* Try just the PSYMTABS_ADDRMAP mapping first as it has better granularity
than the later used TEXTLOW/TEXTHIGH one. */
+#ifndef __i386__
if (objfile->psymtabs_addrmap != NULL)
{
pst = addrmap_find (objfile->psymtabs_addrmap, pc);
@@ -343,6 +347,7 @@ find_pc_sect_psymtab (struct objfile *ob
}
next:
+#endif
/* Existing PSYMTABS_ADDRMAP mapping is present even for PARTIAL_SYMTABs
which still have no corresponding full SYMTABs read. But it is not
@@ -361,7 +366,12 @@ find_pc_sect_psymtab (struct objfile *ob
best_pst = find_pc_sect_psymtab_closer (objfile, pc, section, pst,
msymbol);
+#ifdef CRASH_MERGE
+ if ((best_pst != NULL) &&
+ gdb_line_number_callback(pc, pst->textlow, pst->texthigh))
+#else
if (best_pst != NULL)
+#endif
return best_pst;
}
--- gdb-7.6/gdb/symtab.c.orig
+++ gdb-7.6/gdb/symtab.c
@@ -1198,7 +1198,9 @@ demangle_for_lookup (const char *name, e
doesn't affect these calls since they are looking for a known
variable and thus can probably assume it will never hit the C++
code). */
-
+#ifdef CRASH_MERGE
+static void gdb_bait_and_switch(char *, struct symbol *);
+#endif
struct symbol *
lookup_symbol_in_language (const char *name, const struct block *block,
const domain_enum domain, enum language lang,
@@ -1212,17 +1214,30 @@ lookup_symbol_in_language (const char *n
is_a_field_of_this);
do_cleanups (cleanup);
+#ifdef CRASH_MERGE
+ if (returnval && (domain == VAR_DOMAIN))
+ gdb_bait_and_switch((char *)modified_name, returnval);
+#endif
+
return returnval;
}
/* Behave like lookup_symbol_in_language, but performed with the
current language. */
+#ifdef CRASH_MERGE
+static struct block *gdb_get_crash_block(void);
+#endif
+
struct symbol *
lookup_symbol (const char *name, const struct block *block,
domain_enum domain,
struct field_of_this_result *is_a_field_of_this)
{
+#ifdef CRASH_MERGE
+ if (!block)
+ block = gdb_get_crash_block();
+#endif
return lookup_symbol_in_language (name, block, domain,
current_language->la_language,
is_a_field_of_this);
@@ -5100,3 +5115,662 @@ When enabled, debugging messages are pri
observer_attach_executable_changed (symtab_observer_executable_changed);
}
+
+#ifdef CRASH_MERGE
+#include "gdb-stabs.h"
+#include "version.h"
+#define GDB_COMMON
+#include "../../defs.h"
+
+static void get_member_data(struct gnu_request *, struct type *);
+static void dump_enum(struct type *, struct gnu_request *);
+static void eval_enum(struct type *, struct gnu_request *);
+static void gdb_get_line_number(struct gnu_request *);
+static void gdb_get_datatype(struct gnu_request *);
+static void gdb_get_symbol_type(struct gnu_request *);
+static void gdb_command_exists(struct gnu_request *);
+static void gdb_debug_command(struct gnu_request *);
+static void gdb_function_numargs(struct gnu_request *);
+static void gdb_add_symbol_file(struct gnu_request *);
+static void gdb_delete_symbol_file(struct gnu_request *);
+static void gdb_patch_symbol_values(struct gnu_request *);
+extern void replace_ui_file_FILE(struct ui_file *, FILE *);
+static void get_user_print_option_address(struct gnu_request *);
+extern int get_frame_offset(CORE_ADDR);
+static void gdb_set_crash_block(struct gnu_request *);
+void gdb_command_funnel(struct gnu_request *);
+
+struct objfile *gdb_kernel_objfile = { 0 };
+
+static ulong gdb_merge_flags = 0;
+#define KERNEL_SYMBOLS_PATCHED (0x1)
+
+#undef STREQ
+#define STREQ(A, B) (A && B && (strcmp(A, B) == 0))
+
+/*
+ * All commands from above come through here.
+ */
+void
+gdb_command_funnel(struct gnu_request *req)
+{
+ struct symbol *sym;
+
+ if (req->command != GNU_VERSION) {
+ replace_ui_file_FILE(gdb_stdout, req->fp);
+ replace_ui_file_FILE(gdb_stderr, req->fp);
+ do_cleanups(all_cleanups());
+ }
+
+ switch (req->command)
+ {
+ case GNU_VERSION:
+ req->buf = (char *)version;
+ break;
+
+ case GNU_PASS_THROUGH:
+ execute_command(req->buf,
+ req->flags & GNU_FROM_TTY_OFF ? FALSE : TRUE);
+ break;
+
+ case GNU_USER_PRINT_OPTION:
+ get_user_print_option_address(req);
+ break;
+
+ case GNU_RESOLVE_TEXT_ADDR:
+ sym = find_pc_function(req->addr);
+ if (!sym || TYPE_CODE(sym->type) != TYPE_CODE_FUNC)
+ req->flags |= GNU_COMMAND_FAILED;
+ break;
+
+ case GNU_DISASSEMBLE:
+ if (req->addr2)
+ sprintf(req->buf, "disassemble 0x%lx 0x%lx",
+ req->addr, req->addr2);
+ else
+ sprintf(req->buf, "disassemble 0x%lx", req->addr);
+ execute_command(req->buf, TRUE);
+ break;
+
+ case GNU_ADD_SYMBOL_FILE:
+ gdb_add_symbol_file(req);
+ break;
+
+ case GNU_DELETE_SYMBOL_FILE:
+ gdb_delete_symbol_file(req);
+ break;
+
+ case GNU_GET_LINE_NUMBER:
+ gdb_get_line_number(req);
+ break;
+
+ case GNU_GET_DATATYPE:
+ gdb_get_datatype(req);
+ break;
+
+ case GNU_GET_SYMBOL_TYPE:
+ gdb_get_symbol_type(req);
+ break;
+
+ case GNU_COMMAND_EXISTS:
+ gdb_command_exists(req);
+ break;
+
+ case GNU_ALPHA_FRAME_OFFSET:
+ req->value = 0;
+ break;
+
+ case GNU_FUNCTION_NUMARGS:
+ gdb_function_numargs(req);
+ break;
+
+ case GNU_DEBUG_COMMAND:
+ gdb_debug_command(req);
+ break;
+
+ case GNU_PATCH_SYMBOL_VALUES:
+ gdb_patch_symbol_values(req);
+ break;
+
+ case GNU_SET_CRASH_BLOCK:
+ gdb_set_crash_block(req);
+ break;
+
+ default:
+ req->flags |= GNU_COMMAND_FAILED;
+ break;
+ }
+}
+
+/*
+ * Given a PC value, return the file and line number.
+ */
+static void
+gdb_get_line_number(struct gnu_request *req)
+{
+ struct symtab_and_line sal;
+ struct symbol *sym;
+ CORE_ADDR pc;
+
+#define LASTCHAR(s) (s[strlen(s)-1])
+
+ /*
+ * Prime the addrmap pump.
+ */
+ if (req->name)
+ sym = lookup_symbol(req->name, 0, VAR_DOMAIN, 0);
+
+ pc = req->addr;
+
+ sal = find_pc_line(pc, 0);
+
+ if (!sal.symtab) {
+ req->buf[0] = '\0';
+ return;
+ }
+
+ if (sal.symtab->filename && sal.symtab->dirname) {
+ if (sal.symtab->filename[0] == '/')
+ sprintf(req->buf, "%s: %d",
+ sal.symtab->filename, sal.line);
+ else
+ sprintf(req->buf, "%s%s%s: %d",
+ sal.symtab->dirname,
+ LASTCHAR(sal.symtab->dirname) == '/' ? "" : "/",
+ sal.symtab->filename, sal.line);
+ }
+}
+
+
+/*
+ * General purpose routine for determining datatypes.
+ */
+
+static void
+gdb_get_datatype(struct gnu_request *req)
+{
+ register struct cleanup *old_chain = NULL;
+ register struct type *type;
+ register struct type *typedef_type;
+ struct expression *expr;
+ struct symbol *sym;
+ register int i;
+ struct field *nextfield;
+ struct value *val;
+
+ if (gdb_CRASHDEBUG(2))
+ console("gdb_get_datatype [%s] (a)\n", req->name);
+
+ req->typecode = TYPE_CODE_UNDEF;
+
+ /*
+ * lookup_symbol() will pick up struct and union names.
+ */
+ sym = lookup_symbol(req->name, 0, STRUCT_DOMAIN, 0);
+ if (sym) {
+ req->typecode = TYPE_CODE(sym->type);
+ req->length = TYPE_LENGTH(sym->type);
+ if (req->member)
+ get_member_data(req, sym->type);
+
+ if (TYPE_CODE(sym->type) == TYPE_CODE_ENUM) {
+ if (req->flags & GNU_PRINT_ENUMERATORS)
+ dump_enum(sym->type, req);
+ }
+
+ return;
+ }
+
+ /*
+ * Otherwise parse the expression.
+ */
+ if (gdb_CRASHDEBUG(2))
+ console("gdb_get_datatype [%s] (b)\n", req->name);
+
+ expr = parse_expression(req->name);
+
+ old_chain = make_cleanup(free_current_contents, &expr);
+
+
+ switch (expr->elts[0].opcode)
+ {
+ case OP_VAR_VALUE:
+ if (gdb_CRASHDEBUG(2))
+ console("expr->elts[0].opcode: OP_VAR_VALUE\n");
+ type = expr->elts[2].symbol->type;
+ if (req->flags & GNU_VAR_LENGTH_TYPECODE) {
+ req->typecode = TYPE_CODE(type);
+ req->length = TYPE_LENGTH(type);
+ }
+ if (TYPE_CODE(type) == TYPE_CODE_ENUM) {
+ req->typecode = TYPE_CODE(type);
+ req->value = SYMBOL_VALUE(expr->elts[2].symbol);
+ req->tagname = (char *)TYPE_TAG_NAME(type);
+ if (!req->tagname) {
+ val = evaluate_type(expr);
+ eval_enum(value_type(val), req);
+ }
+ }
+ break;
+
+ case OP_TYPE:
+ if (gdb_CRASHDEBUG(2))
+ console("expr->elts[0].opcode: OP_TYPE\n");
+ type = expr->elts[1].type;
+
+ req->typecode = TYPE_CODE(type);
+ req->length = TYPE_LENGTH(type);
+
+ if (TYPE_CODE(type) == TYPE_CODE_TYPEDEF) {
+ req->is_typedef = TYPE_CODE_TYPEDEF;
+ if ((typedef_type = check_typedef(type))) {
+ req->typecode = TYPE_CODE(typedef_type);
+ req->length = TYPE_LENGTH(typedef_type);
+ type = typedef_type;
+ }
+ }
+
+ if (TYPE_CODE(type) == TYPE_CODE_ENUM) {
+ if (req->is_typedef)
+ if (req->flags & GNU_PRINT_ENUMERATORS) {
+ if (req->is_typedef)
+ fprintf_filtered(gdb_stdout,
+ "typedef ");
+ dump_enum(type, req);
+ }
+ }
+
+ if (req->member)
+ get_member_data(req, type);
+
+ break;
+
+ default:
+ if (gdb_CRASHDEBUG(2))
+ console("expr->elts[0].opcode: %d (?)\n",
+ expr->elts[0].opcode);
+ break;
+
+ }
+
+ do_cleanups(old_chain);
+}
+
+/*
+ * More robust enum list dump that gdb's, showing the value of each
+ * identifier, each on its own line.
+ */
+static void
+dump_enum(struct type *type, struct gnu_request *req)
+{
+ register int i;
+ int len;
+ int lastval;
+
+ len = TYPE_NFIELDS (type);
+ lastval = 0;
+ if (TYPE_TAG_NAME(type))
+ fprintf_filtered(gdb_stdout,
+ "enum %s {\n", TYPE_TAG_NAME (type));
+ else
+ fprintf_filtered(gdb_stdout, "enum {\n");
+
+ for (i = 0; i < len; i++) {
+ fprintf_filtered(gdb_stdout, " %s",
+ TYPE_FIELD_NAME (type, i));
+ if (lastval != TYPE_FIELD_BITPOS (type, i)) {
+ fprintf_filtered (gdb_stdout, " = %d",
+ TYPE_FIELD_BITPOS (type, i));
+ lastval = TYPE_FIELD_BITPOS (type, i);
+ } else
+ fprintf_filtered(gdb_stdout, " = %d", lastval);
+ fprintf_filtered(gdb_stdout, "\n");
+ lastval++;
+ }
+ if (TYPE_TAG_NAME(type))
+ fprintf_filtered(gdb_stdout, "};\n");
+ else
+ fprintf_filtered(gdb_stdout, "} %s;\n", req->name);
+}
+
+/*
+ * Given an enum type with no tagname, determine its value.
+ */
+static void
+eval_enum(struct type *type, struct gnu_request *req)
+{
+ register int i;
+ int len;
+ int lastval;
+
+ len = TYPE_NFIELDS (type);
+ lastval = 0;
+
+ for (i = 0; i < len; i++) {
+ if (lastval != TYPE_FIELD_BITPOS (type, i)) {
+ lastval = TYPE_FIELD_BITPOS (type, i);
+ }
+ if (STREQ(TYPE_FIELD_NAME(type, i), req->name)) {
+ req->tagname = "(unknown)";
+ req->value = lastval;
+ return;
+ }
+ lastval++;
+ }
+}
+
+/*
+ * Walk through a struct type's list of fields looking for the desired
+ * member field, and when found, return its relevant data.
+ */
+static void
+get_member_data(struct gnu_request *req, struct type *type)
+{
+ register short i;
+ struct field *nextfield;
+ short nfields;
+ struct type *typedef_type;
+
+ req->member_offset = -1;
+
+ nfields = TYPE_MAIN_TYPE(type)->nfields;
+ nextfield = TYPE_MAIN_TYPE(type)->flds_bnds.fields;
+
+ if (nfields == 0) {
+ struct type *newtype;
+ newtype = lookup_transparent_type(req->name);
+ if (newtype) {
+ console("get_member_data(%s.%s): switching type from %lx to %lx\n",
+ req->name, req->member, type, newtype);
+ nfields = TYPE_MAIN_TYPE(newtype)->nfields;
+ nextfield = TYPE_MAIN_TYPE(newtype)->flds_bnds.fields;
+ }
+ }
+
+ for (i = 0; i < nfields; i++) {
+ if (STREQ(req->member, nextfield->name)) {
+ req->member_offset = nextfield->loc.bitpos;
+ req->member_length = TYPE_LENGTH(nextfield->type);
+ req->member_typecode = TYPE_CODE(nextfield->type);
+ if ((req->member_typecode == TYPE_CODE_TYPEDEF) &&
+ (typedef_type = check_typedef(nextfield->type)))
+ req->member_length = TYPE_LENGTH(typedef_type);
+ return;
+ }
+ nextfield++;
+ }
+}
+
+/*
+ * Check whether a command exists. If it doesn't, the command will be
+ * returned indirectly via the error_hook.
+ */
+static void
+gdb_command_exists(struct gnu_request *req)
+{
+ extern struct cmd_list_element *cmdlist;
+ register struct cmd_list_element *c;
+
+ req->value = FALSE;
+ c = lookup_cmd(&req->name, cmdlist, "", 0, 1);
+ req->value = TRUE;
+}
+
+static void
+gdb_function_numargs(struct gnu_request *req)
+{
+ struct symbol *sym;
+
+ sym = find_pc_function(req->pc);
+
+ if (!sym || TYPE_CODE(sym->type) != TYPE_CODE_FUNC) {
+ req->flags |= GNU_COMMAND_FAILED;
+ return;
+ }
+
+ req->value = (ulong)TYPE_NFIELDS(sym->type);
+}
+
+struct load_module *gdb_current_load_module = NULL;
+
+static void
+gdb_add_symbol_file(struct gnu_request *req)
+{
+ register struct objfile *loaded_objfile = NULL;
+ register struct objfile *objfile;
+ register struct minimal_symbol *m;
+ struct load_module *lm;
+ int external, subsequent, found;
+ off_t offset;
+ ulong value, adjusted;
+ struct symbol *sym;
+ struct expression *expr;
+ struct cleanup *old_chain;
+ int i;
+ int allsect = 0;
+ char *secname;
+ char buf[80];
+
+ gdb_current_load_module = lm = (struct load_module *)req->addr;
+
+ req->name = lm->mod_namelist;
+ gdb_delete_symbol_file(req);
+
+ if ((lm->mod_flags & MOD_NOPATCH) == 0) {
+ for (i = 0 ; i < lm->mod_sections; i++) {
+ if (STREQ(lm->mod_section_data[i].name, ".text") &&
+ (lm->mod_section_data[i].flags & SEC_FOUND))
+ allsect = 1;
+ }
+
+ if (!allsect) {
+ sprintf(req->buf, "add-symbol-file %s 0x%lx %s", lm->mod_namelist,
+ lm->mod_text_start ? lm->mod_text_start : lm->mod_base,
+ lm->mod_flags & MOD_DO_READNOW ? "-readnow" : "");
+ if (lm->mod_data_start) {
+ sprintf(buf, " -s .data 0x%lx", lm->mod_data_start);
+ strcat(req->buf, buf);
+ }
+ if (lm->mod_bss_start) {
+ sprintf(buf, " -s .bss 0x%lx", lm->mod_bss_start);
+ strcat(req->buf, buf);
+ }
+ if (lm->mod_rodata_start) {
+ sprintf(buf, " -s .rodata 0x%lx", lm->mod_rodata_start);
+ strcat(req->buf, buf);
+ }
+ } else {
+ sprintf(req->buf, "add-symbol-file %s 0x%lx %s", lm->mod_namelist,
+ lm->mod_text_start, lm->mod_flags & MOD_DO_READNOW ?
+ "-readnow" : "");
+ for (i = 0; i < lm->mod_sections; i++) {
+ secname = lm->mod_section_data[i].name;
+ if ((lm->mod_section_data[i].flags & SEC_FOUND) &&
+ !STREQ(secname, ".text")) {
+ sprintf(buf, " -s %s 0x%lx", secname,
+ lm->mod_section_data[i].offset + lm->mod_base);
+ strcat(req->buf, buf);
+ }
+ }
+ }
+ }
+
+ if (gdb_CRASHDEBUG(1))
+ fprintf_filtered(gdb_stdout, "%s\n", req->buf);
+
+ execute_command(req->buf, FALSE);
+
+ ALL_OBJFILES(objfile) {
+ if (same_file(objfile->name, lm->mod_namelist)) {
+ loaded_objfile = objfile;
+ break;
+ }
+ }
+
+ if (!loaded_objfile)
+ req->flags |= GNU_COMMAND_FAILED;
+}
+
+static void
+gdb_delete_symbol_file(struct gnu_request *req)
+{
+ register struct objfile *objfile;
+
+ ALL_OBJFILES(objfile) {
+ if (STREQ(objfile->name, req->name) ||
+ same_file(objfile->name, req->name)) {
+ free_objfile(objfile);
+ break;
+ }
+ }
+
+ if (gdb_CRASHDEBUG(2)) {
+ fprintf_filtered(gdb_stdout, "current object files:\n");
+ ALL_OBJFILES(objfile)
+ fprintf_filtered(gdb_stdout, " %s\n", objfile->name);
+ }
+}
+
+/*
+ * Walk through all minimal_symbols, patching their values with the
+ * correct addresses.
+ */
+static void
+gdb_patch_symbol_values(struct gnu_request *req)
+{
+ struct minimal_symbol *msymbol;
+ struct objfile *objfile;
+
+ req->name = PATCH_KERNEL_SYMBOLS_START;
+ patch_kernel_symbol(req);
+
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ req->name = (char *)msymbol->ginfo.name;
+ req->addr = (ulong)(&SYMBOL_VALUE_ADDRESS(msymbol));
+ if (!patch_kernel_symbol(req)) {
+ req->flags |= GNU_COMMAND_FAILED;
+ break;
+ }
+ }
+
+ req->name = PATCH_KERNEL_SYMBOLS_STOP;
+ patch_kernel_symbol(req);
+
+ clear_symtab_users(0);
+ gdb_merge_flags |= KERNEL_SYMBOLS_PATCHED;
+}
+
+static void
+gdb_get_symbol_type(struct gnu_request *req)
+{
+ struct expression *expr;
+ struct value *val;
+ struct cleanup *old_chain = NULL;
+ struct type *type;
+ struct type *target_type;
+
+ req->typecode = TYPE_CODE_UNDEF;
+
+ expr = parse_expression (req->name);
+ old_chain = make_cleanup (free_current_contents, &expr);
+ val = evaluate_type (expr);
+
+ type = value_type(val);
+
+ req->type_name = (char *)TYPE_MAIN_TYPE(type)->name;
+ req->typecode = TYPE_MAIN_TYPE(type)->code;
+ req->length = type->length;
+ target_type = TYPE_MAIN_TYPE(type)->target_type;
+
+ if (target_type) {
+ req->target_typename = (char *)TYPE_MAIN_TYPE(target_type)->name;
+ req->target_typecode = TYPE_MAIN_TYPE(target_type)->code;
+ req->target_length = target_type->length;
+ }
+
+ if (req->member)
+ get_member_data(req, type);
+
+ do_cleanups (old_chain);
+}
+
+static void
+gdb_debug_command(struct gnu_request *req)
+{
+
+}
+
+/*
+ * Only necessary on "patched" kernel symbol sessions, and called only by
+ * lookup_symbol(), pull a symbol value bait-and-switch operation by altering
+ * either a data symbol's address value or a text symbol's block start address.
+ */
+static void
+gdb_bait_and_switch(char *name, struct symbol *sym)
+{
+ struct minimal_symbol *msym;
+ struct block *block;
+
+ if ((gdb_merge_flags & KERNEL_SYMBOLS_PATCHED) &&
+ (msym = lookup_minimal_symbol(name, NULL, gdb_kernel_objfile))) {
+ if (sym->aclass == LOC_BLOCK) {
+ block = (struct block *)SYMBOL_BLOCK_VALUE(sym);
+ BLOCK_START(block) = SYMBOL_VALUE_ADDRESS(msym);
+ } else
+ SYMBOL_VALUE_ADDRESS(sym) = SYMBOL_VALUE_ADDRESS(msym);
+ }
+}
+
+#include "valprint.h"
+
+void
+get_user_print_option_address(struct gnu_request *req)
+{
+ extern struct value_print_options user_print_options;
+
+ req->addr = 0;
+
+ if (strcmp(req->name, "output_format") == 0)
+ req->addr = (ulong)&user_print_options.output_format;
+ if (strcmp(req->name, "print_max") == 0)