patch-2.1.97 linux/arch/sparc/boot/btfixupprep.c

• Lines: 346
• Date: Tue Apr 14 17:44:18 1998
• Orig file: v2.1.96/linux/arch/sparc/boot/btfixupprep.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.96/linux/arch/sparc/boot/btfixupprep.c linux/arch/sparc/boot/btfixupprep.c
@@ -0,0 +1,345 @@
+/* $Id: btfixupprep.c,v 1.3 1998/03/09 14:03:10 jj Exp $
+   Simple utility to prepare vmlinux image for sparc.
+   Resolves all BTFIXUP uses and settings and creates
+   a special .s object to link to the image.
+   
+   Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+   
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+   
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   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.  */
+   
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <malloc.h>
+
+#define MAXSYMS 1024
+
+static char *relrec = "RELOCATION RECORDS FOR [";
+static int rellen;
+
+struct _btfixup;
+
+typedef struct _btfixuprel {
+	char *sect;
+	unsigned long offset;
+	struct _btfixup *f;
+	int frel;
+	struct _btfixuprel *next;
+} btfixuprel;
+
+typedef struct _btfixup {
+	int type;
+	int setinitval;
+	unsigned int initval;
+	char *initvalstr;
+	char *name;
+	btfixuprel *rel;
+} btfixup;
+
+btfixup array[MAXSYMS];
+int last = 0;
+char buffer[1024];
+unsigned long lastfoffset = -1;
+unsigned long lastfrelno;
+btfixup *lastf;
+
+void fatal(void) __attribute__((noreturn));
+void fatal(void)
+{
+	fprintf(stderr, "Malformed output from objdump\n%s\n", buffer);
+	exit(1);
+}
+
+btfixup *find(int type, char *name)
+{
+	int i;
+	for (i = 0; i < last; i++) {
+		if (array[i].type == type && !strcmp(array[i].name, name))
+			return array + i;
+	}
+	array[last].type = type;
+	array[last].name = strdup(name);
+	array[last].setinitval = 0;
+	if (!array[last].name) fatal();
+	array[last].rel = NULL;
+	last++;
+	if (last >= MAXSYMS) {
+		fprintf(stderr, "Ugh. Something strange. More than %d different BTFIXUP symbols\n", MAXSYMS);
+		exit(1);
+	}
+	return array + last - 1;
+}
+
+int main(int argc,char **argv)
+{
+	char *p, *q;
+	char *sect;
+	int i, j, k;
+	unsigned int initval;
+	int shift;
+	btfixup *f;
+	btfixuprel *r, **rr;
+	unsigned long offset;
+	char *initvalstr;
+
+	rellen = strlen(relrec);
+	while (fgets (buffer, 1024, stdin) != NULL)
+		if (!strncmp (buffer, relrec, rellen))
+			goto main1;
+	fatal();
+main1:
+	sect = malloc(strlen (buffer + rellen) + 1);
+	if (!sect) fatal();
+	strcpy (sect, buffer + rellen);
+	p = strchr (sect, ']');
+	if (!p) fatal();
+	*p = 0;
+	if (fgets (buffer, 1024, stdin) == NULL)
+		fatal();
+	while (fgets (buffer, 1024, stdin) != NULL) {
+		if (!strncmp (buffer, relrec, rellen))
+			goto main1;
+		p = strchr (buffer, '\n');
+		if (p) *p = 0;
+		if (strlen (buffer) < 30)
+			continue;
+		if (strncmp (buffer + 8, " R_SPARC_", 9))
+			continue;
+		if (buffer[27] != '_' || buffer[28] != '_' || buffer[29] != '_')
+			continue;
+		switch (buffer[30]) {
+			case 'f':	/* CALL */
+			case 'b':	/* BLACKBOX */
+			case 's':	/* SIMM13 */
+			case 'a':	/* HALF */
+			case 'h':	/* SETHI */
+			case 'i':	/* INT */
+				break;
+			default:
+				continue;
+		}
+		p = strchr (buffer + 32, '+');
+		if (p) *p = 0;
+		shift = 32;
+		if (buffer[31] == 's' && buffer[32] == '_') {
+			shift = 33;
+			if (strcmp (sect, ".text.init")) {
+				fprintf(stderr, "Wrong use of '%s' BTFIXUPSET.\nBTFIXUPSET_CALL can be used only in __init sections\n", buffer+shift);
+				exit(1);
+			}
+		} else if (buffer[31] != '_')
+			continue;
+		if (strcmp (sect, ".text") && strcmp (sect, ".text.init") && (strcmp (sect, "__ksymtab") || buffer[30] != 'f')) {
+			if (buffer[30] == 'f')
+				fprintf(stderr, "Wrong use of '%s' in '%s' section. It can be only used in .text, .text.init and __ksymtab\n", buffer + shift, sect);
+			else
+				fprintf(stderr, "Wrong use of '%s' in '%s' section. It can be only used in .text and .text.init\n", buffer + shift, sect);
+			exit(1);
+		}
+		p = strstr (buffer + shift, "__btset_");
+		if (p && buffer[31] == 's') {
+			fprintf(stderr, "__btset_ in BTFIXUP name can only be used when defining the variable, not for setting\n%s\n", buffer);
+			exit(1);
+		}
+		initval = 0;
+		initvalstr = NULL;
+		if (p) {
+			if (p[8] != '0' || p[9] != 'x') {
+				fprintf(stderr, "Pre-initialized values can be only initialized with hexadecimal constants starting 0x\n%s\n", buffer);
+				exit(1);
+			}
+			initval = strtoul(p + 10, &q, 16);
+			if (*q || !initval) {
+				fprintf(stderr, "Pre-initialized values can be only in the form name__btset_0xXXXXXXXX where X are hex digits.\nThey cannot be name__btset_0x00000000 though. Use BTFIXUPDEF_XX instead of BTFIXUPDEF_XX_INIT then.\n%s\n", buffer);
+				exit(1);
+			}
+			initvalstr = p + 10;
+			*p = 0;
+		}
+		f = find(buffer[30], buffer + shift);
+		if (buffer[31] == 's')
+			continue;
+		switch (buffer[30]) {
+		case 'f':
+			if (initval) {
+				fprintf(stderr, "Cannot use pre-initalized fixups for calls\n%s\n", buffer);
+				exit(1);
+			}
+			if (!strcmp (sect, "__ksymtab")) {
+				if (strncmp (buffer + 17, "32        ", 10)) {
+					fprintf(stderr, "BTFIXUP_CALL in EXPORT_SYMBOL results in relocation other than R_SPARC_32\n\%s\n", buffer);
+					exit(1);
+				}
+			} else if (strncmp (buffer + 17, "WDISP30   ", 10) &&
+				   strncmp (buffer + 17, "HI22      ", 10) &&
+				   strncmp (buffer + 17, "LO10      ", 10)) {
+				fprintf(stderr, "BTFIXUP_CALL results in relocation other than R_SPARC_WDISP30, R_SPARC_HI22 or R_SPARC_LO10\n%s\n", buffer);
+				exit(1);
+			}
+			break;
+		case 'b':
+			if (initval) {
+				fprintf(stderr, "Cannot use pre-initialized fixups for blackboxes\n%s\n", buffer);
+				exit(1);
+			}
+			if (strncmp (buffer + 17, "HI22      ", 10)) {
+				fprintf(stderr, "BTFIXUP_BLACKBOX results in relocation other than R_SPARC_HI22\n%s\n", buffer);
+				exit(1);
+			}
+			break;
+		case 's':
+			if (initval + 0x1000 >= 0x2000) {
+				fprintf(stderr, "Wrong initializer for SIMM13. Has to be from $fffff000 to $00000fff\n%s\n", buffer);
+				exit(1);
+			}
+			if (strncmp (buffer + 17, "13        ", 10)) {
+				fprintf(stderr, "BTFIXUP_SIMM13 results in relocation other than R_SPARC_13\n%s\n", buffer);
+				exit(1);
+			}
+			break;
+		case 'a':
+			if (initval + 0x1000 >= 0x2000 && (initval & 0x3ff)) {
+				fprintf(stderr, "Wrong initializer for HALF.\n%s\n", buffer);
+				exit(1);
+			}
+			if (strncmp (buffer + 17, "13        ", 10)) {
+				fprintf(stderr, "BTFIXUP_HALF results in relocation other than R_SPARC_13\n%s\n", buffer);
+				exit(1);
+			}
+			break;
+		case 'h':
+			if (initval & 0x3ff) {
+				fprintf(stderr, "Wrong initializer for SETHI. Cannot have set low 10 bits\n%s\n", buffer);
+				exit(1);
+			}
+			if (strncmp (buffer + 17, "HI22      ", 10)) {
+				fprintf(stderr, "BTFIXUP_SETHI results in relocation other than R_SPARC_HI22\n%s\n", buffer);
+				exit(1);
+			}
+			break;
+		case 'i':
+			if (initval) {
+				fprintf(stderr, "Cannot use pre-initalized fixups for INT\n%s\n", buffer);
+				exit(1);
+			}
+			if (strncmp (buffer + 17, "HI22      ", 10) && strncmp (buffer + 17, "LO10      ", 10)) {
+				fprintf(stderr, "BTFIXUP_INT results in relocation other than R_SPARC_HI22 and R_SPARC_LO10\n%s\n", buffer);
+				exit(1);
+			}
+			break;
+		}
+		if (!f->setinitval) {
+			f->initval = initval;
+			if (initvalstr) {
+				f->initvalstr = strdup(initvalstr);
+				if (!f->initvalstr) fatal();
+			}
+			f->setinitval = 1;
+		} else if (f->initval != initval) {
+			fprintf(stderr, "Btfixup %s previously used with initializer %s which doesn't match with current initializer\n%s\n",
+					f->name, f->initvalstr ? : "0x00000000", buffer);
+			exit(1);
+		} else if (initval && strcmp(f->initvalstr, initvalstr)) {
+			fprintf(stderr, "Btfixup %s previously used with initializer %s which doesn't match with current initializer.\n"
+					"Initializers have to match literally as well.\n%s\n",
+					f->name, f->initvalstr, buffer);
+			exit(1);
+		}
+		offset = strtoul(buffer, &q, 16);
+		if (q != buffer + 8 || (!offset && strncmp (buffer, "00000000 ", 9))) {
+			fprintf(stderr, "Malformed relocation address in\n%s\n", buffer);
+			exit(1);
+		}
+		for (k = 0, r = f->rel, rr = &f->rel; r; rr = &r->next, r = r->next, k++)
+			if (r->offset == offset && !strcmp(r->sect, sect)) {
+				fprintf(stderr, "Ugh. One address has two relocation records\n");
+				exit(1);
+			}
+		*rr = malloc(sizeof(btfixuprel));
+		if (!*rr) fatal();
+		(*rr)->offset = offset;
+		(*rr)->f = NULL;
+		if (buffer[30] == 'f') {
+			lastf = f;
+			lastfoffset = offset;
+			lastfrelno = k;
+		} else if (lastfoffset + 4 == offset) {
+			(*rr)->f = lastf;
+			(*rr)->frel = lastfrelno;
+		}
+		(*rr)->sect = sect;
+		(*rr)->next = NULL;
+	}
+	printf("! Generated by btfixupprep. Do not edit.\n\n");
+	printf("\t.section\t\".data.init\",#alloc,#write\n\t.align\t4\n\n");
+	printf("\t.global\t___btfixup_start\n___btfixup_start:\n\n");
+	for (i = 0; i < last; i++) {
+		f = array + i;
+		printf("\t.global\t___%cs_%s\n", f->type, f->name);
+		if (f->type == 'f')
+			printf("___%cs_%s:\n\t.word 0x%08x,0,0,", f->type, f->name, f->type << 24);
+		else
+			printf("___%cs_%s:\n\t.word 0x%08x,0,", f->type, f->name, f->type << 24);
+		for (j = 0, r = f->rel; r != NULL; j++, r = r->next);
+		if (j)
+			printf("%d\n\t.word\t", j * 2);
+		else
+			printf("0\n");
+		for (r = f->rel, j--; r != NULL; j--, r = r->next) {
+			if (!strcmp (r->sect, ".text"))
+				printf ("_stext+0x%08x", r->offset);
+			else if (!strcmp (r->sect, ".text.init"))
+				printf ("__init_begin+0x%08x", r->offset);
+			else if (!strcmp (r->sect, "__ksymtab"))
+				printf ("__start___ksymtab+0x%08x", r->offset);
+			else
+				fatal();
+			if (f->type == 'f' || !r->f)
+				printf (",0");
+			else
+				printf (",___fs_%s+0x%08x", r->f->name, (4 + r->frel*2)*4 + 4);
+			if (j) printf (",");
+			else printf ("\n");
+		}
+		printf("\n");
+	}
+	printf("\n\t.global\t___btfixup_end\n___btfixup_end:\n");
+	printf("\n\n! Define undefined references\n\n");
+	for (i = 0; i < last; i++) {
+		f = array + i;
+		if (f->type == 'f') {
+			printf("\t.global\t___f_%s\n", f->name);
+			printf("___f_%s:\n", f->name);
+		}
+	}
+	printf("\tretl\n\t nop\n\n");
+	for (i = 0; i < last; i++) {
+		f = array + i;
+		if (f->type != 'f') {
+			if (!f->initval) {
+				printf("\t.global\t___%c_%s\n", f->type, f->name);
+				printf("___%c_%s = 0\n", f->type, f->name);
+			} else {
+				printf("\t.global\t___%c_%s__btset_0x%s\n", f->type, f->name, f->initvalstr);
+				printf("___%c_%s__btset_0x%s = 0x%08x\n", f->type, f->name, f->initvalstr, f->initval);
+			}
+		}
+	}
+	printf("\n\n");
+    	exit(0);
+}