patch-2.3.10 linux/scripts/ksymoops/map.c

• Lines: 252
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.9/linux/scripts/ksymoops/map.c
• Orig date: Tue Jan 5 11:13:56 1999

diff -u --recursive --new-file v2.3.9/linux/scripts/ksymoops/map.c linux/scripts/ksymoops/map.c
@@ -1,251 +0,0 @@
-/*
-	map.c.
-
-	Read System.map for ksymoops, create merged System.map.
-
-	Copyright Keith Owens <kaos@ocs.com.au>.
-	Released under the GNU Public Licence, Version 2.
-
-	Tue Nov  3 02:31:01 EST 1998
-	Version 0.6
-	Remove addresses 0-4095 from merged map after writing new map.
-	Move "Using_Version" copy to map.c.
-
-	Wed Oct 28 13:47:23 EST 1998
-	Version 0.4
-	Split into separate sources.
- */
-
-#include "ksymoops.h"
-#include <malloc.h>
-
-/* Read the symbols from System.map */
-void read_system_map(const char *system_map)
-{
-	FILE *f;
-	char *line = NULL, **string = NULL;
-	int i, size = 0;
-	static char const procname[] = "read_system_map";
-
-	if (!system_map)
-		return;
-	ss_init(&ss_system_map, "System.map");
-	if (debug)
-		fprintf(stderr, "DEBUG: %s %s\n", procname, system_map);
-
-	if (!regular_file(system_map, procname))
-		return;
-
-	if (!(f = fopen_local(system_map, "r", procname)))
-		return;
-
-	while (fgets_local(&line, &size, f, procname)) {
-		i = regexec(&re_nm, line, re_nm.re_nsub+1, re_nm_pmatch, 0);
-		if (debug > 3)
-			fprintf(stderr, "DEBUG: %s regexec %d\n", procname, i);
-		if (i == 0) {
-			re_strings(&re_nm, line, re_nm_pmatch, &string);
-			add_symbol(&ss_system_map, string[1], *string[2],
-				   1, string[3]);
-		}
-	}
-
-	fclose_local(f, procname);
-	re_strings_free(&re_nm, &string);
-	free(line);
-	if (ss_system_map.used) {
-		ss_sort_na(&ss_system_map);
-		extract_Version(&ss_system_map);
-	}
-	else {
-		fprintf(stderr,
-			"Warning, no kernel symbols in System.map, is %s a "
-			"valid System.map file?\n",
-			system_map);
-		++warnings;
-	}
-
-	if (debug > 1)
-		fprintf(stderr,
-			"DEBUG: %s %s used %d out of %d entries\n",
-			procname,
-			ss_system_map.source,
-			ss_system_map.used,
-			ss_system_map.alloc);
-}
-
-/* Compare two maps, all symbols in the first should appear in the second. */
-void compare_maps(const SYMBOL_SET *ss1, const SYMBOL_SET *ss2,
-			 int precedence)
-{
-	int i, start = 0;
-	SYMBOL *s1, *s2, **sdrop = precedence == 1 ? &s2 : &s1;
-	const SYMBOL_SET **ssdrop = precedence == 1 ? &ss2 : &ss1;
-
-	if (!(ss1->used && ss2->used))
-		return;
-
-	if (debug > 1)
-		fprintf(stderr,
-			"DEBUG: compare_maps %s vs %s, %s takes precedence\n",
-			ss1->source, ss2->source,
-			precedence == 1 ? ss1->source : ss2->source);
-
-	for (i = 0; i < ss1->used; ++i) {
-		s1 = ss1->symbol+i;
-		if (!(s1->keep))
-			continue;
-		s2 = find_symbol_name(ss2, s1->name, &start);
-		if (!s2) {
-			/* Some types only appear in nm output, not in things
-			 * like System.map.  Silently ignore them.
-			 */
-			if (s1->type == 'a' || s1->type == 't')
-				continue;
-			fprintf(stderr,
-				"Warning: %s symbol %s not found in %s.  "
-				"Ignoring %s entry\n",
-				ss1->source, s1->name,
-				ss2->source, (*ssdrop)->source);
-			++warnings;
-			if (*sdrop)
-				(*sdrop)->keep = 0;
-		}
-		else if (s1->address != s2->address) {
-			/* Type C symbols cannot be resolved from nm to ksyms,
-			 * silently ignore them.
-			 */
-			if (s1->type == 'C' || s2->type == 'C')
-				continue;
-			fprintf(stderr,
-				"Warning: mismatch on symbol %s %c, "
-				"%s says %lx, %s says %lx.  "
-				"Ignoring %s entry\n",
-				s1->name, s1->type, ss1->source, s1->address,
-				ss2->source, s2->address, (*ssdrop)->source);
-			++warnings;
-			if (*sdrop)
-				(*sdrop)->keep = 0;
-		}
-		else
-			++start;	/* step to next entry in ss2 */
-	}
-}
-
-/* Append the second symbol set onto the first */
-static void append_map(SYMBOL_SET *ss1, const SYMBOL_SET *ss2)
-{
-	int i;
-	SYMBOL *s;
-
-	if (!ss2 || !ss2->used)
-		return;
-	if (debug > 1)
-		fprintf(stderr, "DEBUG: append_map %s to %s\n",
-			ss2->source, ss1->source);
-
-	for (i = 0; i < ss2->used; ++i) {
-		s = ss2->symbol+i;
-		if (s->keep)
-			add_symbol_n(ss1, s->address, s->type, 1,
-				s->name);
-	}
-}
-
-/* Compare the various sources and build a merged system map */
-void merge_maps(const char *save_system_map)
-{
-	int i;
-	SYMBOL *s;
-	FILE *f;
-	static char const procname[] = "merge_maps";
-
-	if (debug)
-		fprintf(stderr, "DEBUG: %s\n", procname);
-
-	/* Using_Versions only appears in ksyms, copy to other tables */
-	if ((s = find_symbol_name(&ss_ksyms_base,
-			"Using_Versions", 0))) {
-		if (ss_system_map.used) {
-			add_symbol_n(&ss_system_map, s->address,
-				s->type, s->keep, s->name);
-			ss_sort_na(&ss_system_map);
-		}
-		if (ss_vmlinux.used) {
-			add_symbol_n(&ss_vmlinux, s->address, s->type,
-				s->keep, s->name);
-			ss_sort_na(&ss_vmlinux);
-		}
-	}
-
-	compare_Version();	/* highlight any version problems first */
-	compare_ksyms_lsmod();	/* highlight any missing modules next */
-	compare_maps(&ss_ksyms_base, &ss_vmlinux, 2);
-	compare_maps(&ss_system_map, &ss_vmlinux, 2);
-	compare_maps(&ss_vmlinux, &ss_system_map, 1);
-	compare_maps(&ss_ksyms_base, &ss_system_map, 2);
-
-	if (ss_objects) {
-		map_ksyms_to_modules();
-	}
-
-	ss_init(&ss_merged, "merged");
-	append_map(&ss_merged, &ss_vmlinux);
-	append_map(&ss_merged, &ss_ksyms_base);
-	append_map(&ss_merged, &ss_system_map);
-	for (i = 0; i < ss_ksyms_modules; ++i)
-		append_map(&ss_merged, (ss_ksyms_module+i)->related);
-	if (!ss_merged.used) {
-		fprintf(stderr, "Warning, no symbols in merged map\n");
-		++warnings;
-	}
-
-	/* drop duplicates, type a (registers) and gcc2_compiled. */
-	ss_sort_atn(&ss_merged);
-	s = ss_merged.symbol;
-	for (i = 0; i < ss_merged.used-1; ++i) {
-		if (s->type == 'a' ||
-		    (s->type == 't' && !strcmp(s->name, "gcc2_compiled.")))
-			s->keep = 0;
-		else if (strcmp(s->name, (s+1)->name) == 0 &&
-		    s->address == (s+1)->address) {
-			if (s->type != ' ')
-				(s+1)->keep = 0;
-			else
-				s->keep = 0;
-		}
-		++s;
-	}
-	ss_sort_atn(&ss_merged);	/* will remove dropped variables */
-
-	if (save_system_map) {
-		if (debug)
-			fprintf(stderr, "DEBUG: writing merged map to %s\n",
-				save_system_map);
-		if (!(f = fopen_local(save_system_map, "w", procname)))
-			return;
-		s = ss_merged.symbol;
-		for (i = 0; i < ss_merged.used; ++i) {
-			if (s->keep)
-				fprintf(f, "%s %c %s\n",
-					format_address(s->address),
-					s->type, s->name);
-			++s;
-		}
-	}
-
-	/* The merged map may contain symbols with an address of 0, e.g.
-	 * Using_Versions.  These give incorrect results for low addresses in
-	 * map_address, such addresses map to "Using_Versions+xxx".  Remove
-	 * any addresses below (arbitrary) 4096 from the merged map.  AFAIK,
-	 * Linux does not use the first page on any arch.
-	 */
-	for (i = 0; i < ss_merged.used; ++i) {
-		if ((ss_merged.symbol+i)->address < 4096)
-			(ss_merged.symbol+i)->keep = 0;
-		else
-			break;
-	}
-	if (i)
-		ss_sort_atn(&ss_merged);	/* remove dropped variables */
-}