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-rw-r--r--arch/sparc/boot/Makefile112
-rw-r--r--arch/sparc/boot/btfixupprep.c386
-rw-r--r--arch/sparc/boot/piggyback.c272
3 files changed, 770 insertions, 0 deletions
diff --git a/arch/sparc/boot/Makefile b/arch/sparc/boot/Makefile
new file mode 100644
index 00000000..d56d199c
--- /dev/null
+++ b/arch/sparc/boot/Makefile
@@ -0,0 +1,112 @@
+# Makefile for the Sparc boot stuff.
+#
+# Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
+# Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz)
+
+ROOT_IMG := /usr/src/root.img
+ELFTOAOUT := elftoaout
+
+hostprogs-y := piggyback btfixupprep
+targets := tftpboot.img btfix.o btfix.S image zImage vmlinux.aout
+clean-files := System.map
+
+quiet_cmd_elftoaout = ELFTOAOUT $@
+ cmd_elftoaout = $(ELFTOAOUT) $(obj)/image -o $@
+quiet_cmd_piggy = PIGGY $@
+ cmd_piggy = $(obj)/piggyback $(BITS) $@ System.map $(ROOT_IMG)
+quiet_cmd_strip = STRIP $@
+ cmd_strip = $(STRIP) -R .comment -R .note -K sun4u_init -K _end -K _start $< -o $@
+
+ifeq ($(CONFIG_SPARC32),y)
+quiet_cmd_btfix = BTFIX $@
+ cmd_btfix = $(OBJDUMP) -x vmlinux | $(obj)/btfixupprep > $@
+quiet_cmd_sysmap = SYSMAP $(obj)/System.map
+ cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap
+quiet_cmd_image = LD $@
+ cmd_image = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) -o $@
+
+define rule_image
+ $(if $($(quiet)cmd_image), \
+ echo ' $($(quiet)cmd_image)' &&) \
+ $(cmd_image); \
+ $(if $($(quiet)cmd_sysmap), \
+ echo ' $($(quiet)cmd_sysmap)' &&) \
+ $(cmd_sysmap) $@ $(obj)/System.map; \
+ if [ $$? -ne 0 ]; then \
+ rm -f $@; \
+ /bin/false; \
+ fi; \
+ echo 'cmd_$@ := $(cmd_image)' > $(@D)/.$(@F).cmd
+endef
+
+BTOBJS := $(patsubst %/, %/built-in.o, $(VMLINUX_INIT))
+BTLIBS := $(patsubst %/, %/built-in.o, $(VMLINUX_MAIN))
+LDFLAGS_image := -T arch/sparc/kernel/vmlinux.lds $(BTOBJS) \
+ --start-group $(BTLIBS) --end-group \
+ $(kallsyms.o) $(obj)/btfix.o
+
+# Link the final image including btfixup'ed symbols.
+# This is a replacement for the link done in the top-level Makefile.
+# Note: No dependency on the prerequisite files since that would require
+# make to try check if they are updated - and due to changes
+# in gcc options (path for example) this would result in
+# these files being recompiled for each build.
+$(obj)/image: $(obj)/btfix.o FORCE
+ $(call if_changed_rule,image)
+
+$(obj)/zImage: $(obj)/image
+ $(call if_changed,strip)
+ @echo ' kernel: $@ is ready'
+
+$(obj)/btfix.S: $(obj)/btfixupprep vmlinux FORCE
+ $(call if_changed,btfix)
+
+endif
+
+ifeq ($(CONFIG_SPARC64),y)
+
+# Actual linking
+$(obj)/image: vmlinux FORCE
+ $(call if_changed,strip)
+ @echo ' kernel: $@ is ready'
+
+$(obj)/zImage: $(obj)/image
+ $(call if_changed,gzip)
+ @echo ' kernel: $@ is ready'
+
+$(obj)/vmlinux.aout: vmlinux FORCE
+ $(call if_changed,elftoaout)
+ @echo ' kernel: $@ is ready'
+else
+
+# The following lines make a readable image for U-Boot.
+# uImage - Binary file read by U-boot
+# uImage.o - object file of uImage for loading with a
+# flash programmer understanding ELF.
+
+OBJCOPYFLAGS_image.bin := -S -O binary -R .note -R .comment
+$(obj)/image.bin: $(obj)/image FORCE
+ $(call if_changed,objcopy)
+
+$(obj)/image.gz: $(obj)/image.bin
+ $(call if_changed,gzip)
+
+UIMAGE_LOADADDR = $(CONFIG_UBOOT_LOAD_ADDR)
+UIMAGE_ENTRYADDR = $(CONFIG_UBOOT_ENTRY_ADDR)
+UIMAGE_COMPRESSION = gzip
+
+quiet_cmd_uimage.o = UIMAGE.O $@
+ cmd_uimage.o = $(LD) -Tdata $(CONFIG_UBOOT_FLASH_ADDR) \
+ -r -b binary $@ -o $@.o
+
+targets += uImage
+$(obj)/uImage: $(obj)/image.gz
+ $(call if_changed,uimage)
+ $(call if_changed,uimage.o)
+ @echo ' Image $@ is ready'
+
+endif
+
+$(obj)/tftpboot.img: $(obj)/image $(obj)/piggyback System.map $(ROOT_IMG) FORCE
+ $(call if_changed,elftoaout)
+ $(call if_changed,piggy)
diff --git a/arch/sparc/boot/btfixupprep.c b/arch/sparc/boot/btfixupprep.c
new file mode 100644
index 00000000..da031159
--- /dev/null
+++ b/arch/sparc/boot/btfixupprep.c
@@ -0,0 +1,386 @@
+/*
+ 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 *symtab = "SYMBOL TABLE:";
+static char *relrec = "RELOCATION RECORDS FOR [";
+static int rellen;
+static int symlen;
+int mode;
+
+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;
+
+static void fatal(void) __attribute__((noreturn));
+static void fatal(void)
+{
+ fprintf(stderr, "Malformed output from objdump\n%s\n", buffer);
+ exit(1);
+}
+
+static 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;
+}
+
+static void set_mode (char *buffer)
+{
+ for (mode = 0;; mode++)
+ if (buffer[mode] < '0' || buffer[mode] > '9')
+ break;
+ if (mode != 8 && mode != 16)
+ fatal();
+}
+
+
+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;
+
+ symlen = strlen(symtab);
+ while (fgets (buffer, 1024, stdin) != NULL)
+ if (!strncmp (buffer, symtab, symlen))
+ goto main0;
+ fatal();
+main0:
+ 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) {
+ int nbase;
+ if (!strncmp (buffer, relrec, rellen))
+ goto main1;
+ if (mode == 0)
+ set_mode (buffer);
+ p = strchr (buffer, '\n');
+ if (p) *p = 0;
+ if (strlen (buffer) < 22+mode)
+ continue;
+ if (strncmp (buffer + mode, " R_SPARC_", 9))
+ continue;
+ nbase = 27 - 8 + mode;
+ if (buffer[nbase] != '_' || buffer[nbase+1] != '_' || buffer[nbase+2] != '_')
+ continue;
+ switch (buffer[nbase+3]) {
+ case 'f': /* CALL */
+ case 'b': /* BLACKBOX */
+ case 's': /* SIMM13 */
+ case 'a': /* HALF */
+ case 'h': /* SETHI */
+ case 'i': /* INT */
+ break;
+ default:
+ continue;
+ }
+ p = strchr (buffer + nbase+5, '+');
+ if (p) *p = 0;
+ shift = nbase + 5;
+ if (buffer[nbase+4] == 's' && buffer[nbase+5] == '_') {
+ shift = nbase + 6;
+ if (strcmp (sect, ".init.text")) {
+ fprintf(stderr,
+ "Wrong use of '%s' BTFIXUPSET in '%s' section.\n"
+ "BTFIXUPSET_CALL can be used only in"
+ " __init sections\n",
+ buffer + shift, sect);
+ exit(1);
+ }
+ } else if (buffer[nbase+4] != '_')
+ continue;
+ if (!strcmp (sect, ".text.exit"))
+ continue;
+ if (strcmp (sect, ".text") &&
+ strcmp (sect, ".init.text") &&
+ strcmp (sect, ".fixup") &&
+ (strcmp (sect, "__ksymtab") || buffer[nbase+3] != 'f')) {
+ if (buffer[nbase+3] == 'f')
+ fprintf(stderr,
+ "Wrong use of '%s' in '%s' section.\n"
+ " It can be used only in .text, .init.text,"
+ " .fixup and __ksymtab\n",
+ buffer + shift, sect);
+ else
+ fprintf(stderr,
+ "Wrong use of '%s' in '%s' section.\n"
+ " It can be only used in .text, .init.text,"
+ " and .fixup\n", buffer + shift, sect);
+ exit(1);
+ }
+ p = strstr (buffer + shift, "__btset_");
+ if (p && buffer[nbase+4] == '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[nbase+3], buffer + shift);
+ if (buffer[nbase+4] == 's')
+ continue;
+ switch (buffer[nbase+3]) {
+ case 'f':
+ if (initval) {
+ fprintf(stderr, "Cannot use pre-initialized fixups for calls\n%s\n", buffer);
+ exit(1);
+ }
+ if (!strcmp (sect, "__ksymtab")) {
+ if (strncmp (buffer + mode+9, "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 + mode+9, "WDISP30 ", 10) &&
+ strncmp (buffer + mode+9, "HI22 ", 10) &&
+ strncmp (buffer + mode+9, "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 + mode+9, "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 + mode+9, "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 + mode+9, "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 + mode+9, "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-initialized fixups for INT\n%s\n", buffer);
+ exit(1);
+ }
+ if (strncmp (buffer + mode+9, "HI22 ", 10) && strncmp (buffer + mode+9, "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 + mode || (!offset && (mode == 8 ? strncmp (buffer, "00000000 ", 9) : strncmp (buffer, "0000000000000000 ", 17)))) {
+ 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[nbase+3] == '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%08lx", r->offset);
+ else if (!strcmp (r->sect, ".init.text"))
+ printf ("__init_begin+0x%08lx", r->offset);
+ else if (!strcmp (r->sect, "__ksymtab"))
+ printf ("__start___ksymtab+0x%08lx", r->offset);
+ else if (!strcmp (r->sect, ".fixup"))
+ printf ("__start___fixup+0x%08lx", 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);
+}
diff --git a/arch/sparc/boot/piggyback.c b/arch/sparc/boot/piggyback.c
new file mode 100644
index 00000000..c0a798fc
--- /dev/null
+++ b/arch/sparc/boot/piggyback.c
@@ -0,0 +1,272 @@
+/*
+ Simple utility to make a single-image install kernel with initial ramdisk
+ for Sparc tftpbooting without need to set up nfs.
+
+ Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ Pete Zaitcev <zaitcev@yahoo.com> endian fixes for cross-compiles, 2000.
+ Copyright (C) 2011 Sam Ravnborg <sam@ravnborg.org>
+
+ 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 <dirent.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+/*
+ * Note: run this on an a.out kernel (use elftoaout for it),
+ * as PROM looks for a.out image only.
+ */
+
+#define AOUT_TEXT_OFFSET 32
+
+static int is64bit = 0;
+
+/* align to power-of-two size */
+static int align(int n)
+{
+ if (is64bit)
+ return (n + 0x1fff) & ~0x1fff;
+ else
+ return (n + 0xfff) & ~0xfff;
+}
+
+/* read two bytes as big endian */
+static unsigned short ld2(char *p)
+{
+ return (p[0] << 8) | p[1];
+}
+
+/* save 4 bytes as big endian */
+static void st4(char *p, unsigned int x)
+{
+ p[0] = x >> 24;
+ p[1] = x >> 16;
+ p[2] = x >> 8;
+ p[3] = x;
+}
+
+static void die(const char *str)
+{
+ perror(str);
+ exit(1);
+}
+
+static void usage(void)
+{
+ /* fs_img.gz is an image of initial ramdisk. */
+ fprintf(stderr, "Usage: piggyback bits vmlinux.aout System.map fs_img.gz\n");
+ fprintf(stderr, "\tKernel image will be modified in place.\n");
+ exit(1);
+}
+
+static int start_line(const char *line)
+{
+ if (strcmp(line + 8, " T _start\n") == 0)
+ return 1;
+ else if (strcmp(line + 16, " T _start\n") == 0)
+ return 1;
+ return 0;
+}
+
+static int end_line(const char *line)
+{
+ if (strcmp(line + 8, " A _end\n") == 0)
+ return 1;
+ else if (strcmp (line + 16, " A _end\n") == 0)
+ return 1;
+ return 0;
+}
+
+/*
+ * Find address for start and end in System.map.
+ * The file looks like this:
+ * f0004000 T _start
+ * f0379f79 A _end
+ * 1234567890123456
+ * ^coloumn 1
+ * There is support for 64 bit addresses too.
+ *
+ * Return 0 if either start or end is not found
+ */
+static int get_start_end(const char *filename, unsigned int *start,
+ unsigned int *end)
+{
+ FILE *map;
+ char buffer[1024];
+
+ *start = 0;
+ *end = 0;
+ map = fopen(filename, "r");
+ if (!map)
+ die(filename);
+ while (fgets(buffer, 1024, map)) {
+ if (start_line(buffer))
+ *start = strtoul(buffer, NULL, 16);
+ else if (end_line(buffer))
+ *end = strtoul(buffer, NULL, 16);
+ }
+ fclose (map);
+
+ if (*start == 0 || *end == 0)
+ return 0;
+
+ return 1;
+}
+
+#define LOOKBACK (128 * 4)
+#define BUFSIZE 1024
+/*
+ * Find the HdrS entry from head_32/head_64.
+ * We check if it is at the beginning of the file (sparc64 case)
+ * and if not we search for it.
+ * When we search do so in steps of 4 as HdrS is on a 4-byte aligned
+ * address (it is on same alignment as sparc instructions)
+ * Return the offset to the HdrS entry (as off_t)
+ */
+static off_t get_hdrs_offset(int kernelfd, const char *filename)
+{
+ char buffer[BUFSIZE];
+ off_t offset;
+ int i;
+
+ if (lseek(kernelfd, 0, SEEK_SET) < 0)
+ die("lseek");
+ if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
+ die(filename);
+
+ if (buffer[40] == 'H' && buffer[41] == 'd' &&
+ buffer[42] == 'r' && buffer[43] == 'S') {
+ return 40;
+ } else {
+ /* Find the gokernel label */
+ /* Decode offset from branch instruction */
+ offset = ld2(buffer + AOUT_TEXT_OFFSET + 2) << 2;
+ /* Go back 512 bytes so we do not miss HdrS */
+ offset -= LOOKBACK;
+ /* skip a.out header */
+ offset += AOUT_TEXT_OFFSET;
+ if (lseek(kernelfd, offset, SEEK_SET) < 0)
+ die("lseek");
+ if (read(kernelfd, buffer, BUFSIZE) != BUFSIZE)
+ die(filename);
+
+ for (i = 0; i < LOOKBACK; i += 4) {
+ if (buffer[i + 0] == 'H' && buffer[i + 1] == 'd' &&
+ buffer[i + 2] == 'r' && buffer[i + 3] == 'S') {
+ return offset + i;
+ }
+ }
+ }
+ fprintf (stderr, "Couldn't find headers signature in %s\n", filename);
+ exit(1);
+}
+
+int main(int argc,char **argv)
+{
+ static char aout_magic[] = { 0x01, 0x03, 0x01, 0x07 };
+ char buffer[1024];
+ unsigned int i, start, end;
+ off_t offset;
+ struct stat s;
+ int image, tail;
+
+ if (argc != 5)
+ usage();
+ if (strcmp(argv[1], "64") == 0)
+ is64bit = 1;
+ if (stat (argv[4], &s) < 0)
+ die(argv[4]);
+
+ if (!get_start_end(argv[3], &start, &end)) {
+ fprintf(stderr, "Could not determine start and end from %s\n",
+ argv[3]);
+ exit(1);
+ }
+ if ((image = open(argv[2], O_RDWR)) < 0)
+ die(argv[2]);
+ if (read(image, buffer, 512) != 512)
+ die(argv[2]);
+ if (memcmp(buffer, aout_magic, 4) != 0) {
+ fprintf (stderr, "Not a.out. Don't blame me.\n");
+ exit(1);
+ }
+ /*
+ * We need to fill in values for
+ * sparc_ramdisk_image + sparc_ramdisk_size
+ * To locate these symbols search for the "HdrS" text which appear
+ * in the image a little before the gokernel symbol.
+ * See definition of these in init_32.S
+ */
+
+ offset = get_hdrs_offset(image, argv[2]);
+ /* skip HdrS + LINUX_VERSION_CODE + HdrS version */
+ offset += 10;
+
+ if (lseek(image, offset, 0) < 0)
+ die("lseek");
+
+ /*
+ * root_flags = 0
+ * root_dev = 1 (RAMDISK_MAJOR)
+ * ram_flags = 0
+ * sparc_ramdisk_image = "PAGE aligned address after _end")
+ * sparc_ramdisk_size = size of image
+ */
+ st4(buffer, 0);
+ st4(buffer + 4, 0x01000000);
+ st4(buffer + 8, align(end + 32));
+ st4(buffer + 12, s.st_size);
+
+ if (write(image, buffer + 2, 14) != 14)
+ die(argv[2]);
+
+ /* For sparc64 update a_text and clear a_data + a_bss */
+ if (is64bit)
+ {
+ if (lseek(image, 4, 0) < 0)
+ die("lseek");
+ /* a_text */
+ st4(buffer, align(end + 32 + 8191) - (start & ~0x3fffffUL) +
+ s.st_size);
+ /* a_data */
+ st4(buffer + 4, 0);
+ /* a_bss */
+ st4(buffer + 8, 0);
+ if (write(image, buffer, 12) != 12)
+ die(argv[2]);
+ }
+
+ /* seek page aligned boundary in the image file and add boot image */
+ if (lseek(image, AOUT_TEXT_OFFSET - start + align(end + 32), 0) < 0)
+ die("lseek");
+ if ((tail = open(argv[4], O_RDONLY)) < 0)
+ die(argv[4]);
+ while ((i = read(tail, buffer, 1024)) > 0)
+ if (write(image, buffer, i) != i)
+ die(argv[2]);
+ if (close(image) < 0)
+ die("close");
+ if (close(tail) < 0)
+ die("close");
+ return 0;
+}
generated by cgit (git 2.34.1) at 2025-01-09 23:37:10 +0000