|  | /* | 
|  | 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); | 
|  | } |