Merge commit 'v2.6.38-rc1' into kbuild/packaging

1 files changed, 145 insertions, 45 deletions

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 3318692e4e76..e8fba959fffb 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -14,6 +14,7 @@
 #define _GNU_SOURCE
 #include <stdio.h>
 #include <ctype.h>
+#include <string.h>
 #include "modpost.h"
 #include "../../include/generated/autoconf.h"
 #include "../../include/linux/license.h"
@@ -253,7 +254,7 @@ static enum export export_no(const char *s)
 	return export_unknown;
 }
 
-static enum export export_from_sec(struct elf_info *elf, Elf_Section sec)
+static enum export export_from_sec(struct elf_info *elf, unsigned int sec)
 {
 	if (sec == elf->export_sec)
 		return export_plain;
@@ -373,6 +374,8 @@ static int parse_elf(struct elf_info *info, const char *filename)
 	Elf_Ehdr *hdr;
 	Elf_Shdr *sechdrs;
 	Elf_Sym  *sym;
+	const char *secstrings;
+	unsigned int symtab_idx = ~0U, symtab_shndx_idx = ~0U;
 
 	hdr = grab_file(filename, &info->size);
 	if (!hdr) {
@@ -417,8 +420,27 @@ static int parse_elf(struct elf_info *info, const char *filename)
 		return 0;
 	}
 
+	if (hdr->e_shnum == 0) {
+		/*
+		 * There are more than 64k sections,
+		 * read count from .sh_size.
+		 * note: it doesn't need shndx2secindex()
+		 */
+		info->num_sections = TO_NATIVE(sechdrs[0].sh_size);
+	}
+	else {
+		info->num_sections = hdr->e_shnum;
+	}
+	if (hdr->e_shstrndx == SHN_XINDEX) {
+		info->secindex_strings =
+		    shndx2secindex(TO_NATIVE(sechdrs[0].sh_link));
+	}
+	else {
+		info->secindex_strings = hdr->e_shstrndx;
+	}
+
 	/* Fix endianness in section headers */
-	for (i = 0; i < hdr->e_shnum; i++) {
+	for (i = 0; i < info->num_sections; i++) {
 		sechdrs[i].sh_name      = TO_NATIVE(sechdrs[i].sh_name);
 		sechdrs[i].sh_type      = TO_NATIVE(sechdrs[i].sh_type);
 		sechdrs[i].sh_flags     = TO_NATIVE(sechdrs[i].sh_flags);
@@ -431,9 +453,8 @@ static int parse_elf(struct elf_info *info, const char *filename)
 		sechdrs[i].sh_entsize   = TO_NATIVE(sechdrs[i].sh_entsize);
 	}
 	/* Find symbol table. */
-	for (i = 1; i < hdr->e_shnum; i++) {
-		const char *secstrings
-			= (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+	secstrings = (void *)hdr + sechdrs[info->secindex_strings].sh_offset;
+	for (i = 1; i < info->num_sections; i++) {
 		const char *secname;
 		int nobits = sechdrs[i].sh_type == SHT_NOBITS;
 
@@ -461,14 +482,26 @@ static int parse_elf(struct elf_info *info, const char *filename)
 		else if (strcmp(secname, "__ksymtab_gpl_future") == 0)
 			info->export_gpl_future_sec = i;
 
-		if (sechdrs[i].sh_type != SHT_SYMTAB)
-			continue;
+		if (sechdrs[i].sh_type == SHT_SYMTAB) {
+			unsigned int sh_link_idx;
+			symtab_idx = i;
+			info->symtab_start = (void *)hdr +
+			    sechdrs[i].sh_offset;
+			info->symtab_stop  = (void *)hdr +
+			    sechdrs[i].sh_offset + sechdrs[i].sh_size;
+			sh_link_idx = shndx2secindex(sechdrs[i].sh_link);
+			info->strtab       = (void *)hdr +
+			    sechdrs[sh_link_idx].sh_offset;
+		}
 
-		info->symtab_start = (void *)hdr + sechdrs[i].sh_offset;
-		info->symtab_stop  = (void *)hdr + sechdrs[i].sh_offset
-			                         + sechdrs[i].sh_size;
-		info->strtab       = (void *)hdr +
-			             sechdrs[sechdrs[i].sh_link].sh_offset;
+		/* 32bit section no. table? ("more than 64k sections") */
+		if (sechdrs[i].sh_type == SHT_SYMTAB_SHNDX) {
+			symtab_shndx_idx = i;
+			info->symtab_shndx_start = (void *)hdr +
+			    sechdrs[i].sh_offset;
+			info->symtab_shndx_stop  = (void *)hdr +
+			    sechdrs[i].sh_offset + sechdrs[i].sh_size;
+		}
 	}
 	if (!info->symtab_start)
 		fatal("%s has no symtab?\n", filename);
@@ -480,6 +513,21 @@ static int parse_elf(struct elf_info *info, const char *filename)
 		sym->st_value = TO_NATIVE(sym->st_value);
 		sym->st_size  = TO_NATIVE(sym->st_size);
 	}
+
+	if (symtab_shndx_idx != ~0U) {
+		Elf32_Word *p;
+		if (symtab_idx !=
+		    shndx2secindex(sechdrs[symtab_shndx_idx].sh_link))
+			fatal("%s: SYMTAB_SHNDX has bad sh_link: %u!=%u\n",
+			      filename,
+			      shndx2secindex(sechdrs[symtab_shndx_idx].sh_link),
+			      symtab_idx);
+		/* Fix endianness */
+		for (p = info->symtab_shndx_start; p < info->symtab_shndx_stop;
+		     p++)
+			*p = TO_NATIVE(*p);
+	}
+
 	return 1;
 }
 
@@ -503,6 +551,11 @@ static int ignore_undef_symbol(struct elf_info *info, const char *symname)
 		    strncmp(symname, "_rest32gpr_", sizeof("_rest32gpr_") - 1) == 0 ||
 		    strncmp(symname, "_save32gpr_", sizeof("_save32gpr_") - 1) == 0)
 			return 1;
+	if (info->hdr->e_machine == EM_PPC64)
+		/* Special register function linked on all modules during final link of .ko */
+		if (strncmp(symname, "_restgpr0_", sizeof("_restgpr0_") - 1) == 0 ||
+		    strncmp(symname, "_savegpr0_", sizeof("_savegpr0_") - 1) == 0)
+			return 1;
 	/* Do not ignore this symbol */
 	return 0;
 }
@@ -514,7 +567,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
 			       Elf_Sym *sym, const char *symname)
 {
 	unsigned int crc;
-	enum export export = export_from_sec(info, sym->st_shndx);
+	enum export export = export_from_sec(info, get_secindex(info, sym));
 
 	switch (sym->st_shndx) {
 	case SHN_COMMON:
@@ -656,19 +709,19 @@ static const char *sym_name(struct elf_info *elf, Elf_Sym *sym)
 		return "(unknown)";
 }
 
-static const char *sec_name(struct elf_info *elf, int shndx)
+static const char *sec_name(struct elf_info *elf, int secindex)
 {
 	Elf_Shdr *sechdrs = elf->sechdrs;
 	return (void *)elf->hdr +
-	        elf->sechdrs[elf->hdr->e_shstrndx].sh_offset +
-	        sechdrs[shndx].sh_name;
+		elf->sechdrs[elf->secindex_strings].sh_offset +
+		sechdrs[secindex].sh_name;
 }
 
 static const char *sech_name(struct elf_info *elf, Elf_Shdr *sechdr)
 {
 	return (void *)elf->hdr +
-	        elf->sechdrs[elf->hdr->e_shstrndx].sh_offset +
-	        sechdr->sh_name;
+		elf->sechdrs[elf->secindex_strings].sh_offset +
+		sechdr->sh_name;
 }
 
 /* if sym is empty or point to a string
@@ -737,6 +790,8 @@ static const char *section_white_list[] =
 {
 	".comment*",
 	".debug*",
+	".zdebug*",		/* Compressed debug sections. */
+	".GCC-command-line",	/* mn10300 */
 	".mdebug*",        /* alpha, score, mips etc. */
 	".pdr",            /* alpha, score, mips etc. */
 	".stab*",
@@ -981,6 +1036,13 @@ static const struct sectioncheck *section_mismatch(
  *   fromsec = .data*
  *   atsym   =__param*
  *
+ * Pattern 1a:
+ *   module_param_call() ops can refer to __init set function if permissions=0
+ *   The pattern is identified by:
+ *   tosec   = .init.text
+ *   fromsec = .data*
+ *   atsym   = __param_ops_*
+ *
  * Pattern 2:
  *   Many drivers utilise a *driver container with references to
  *   add, remove, probe functions etc.
@@ -1015,6 +1077,12 @@ static int secref_whitelist(const struct sectioncheck *mismatch,
 	    (strncmp(fromsym, "__param", strlen("__param")) == 0))
 		return 0;
 
+	/* Check for pattern 1a */
+	if (strcmp(tosec, ".init.text") == 0 &&
+	    match(fromsec, data_sections) &&
+	    (strncmp(fromsym, "__param_ops_", strlen("__param_ops_")) == 0))
+		return 0;
+
 	/* Check for pattern 2 */
 	if (match(tosec, init_exit_sections) &&
 	    match(fromsec, data_sections) &&
@@ -1047,11 +1115,14 @@ static Elf_Sym *find_elf_symbol(struct elf_info *elf, Elf64_Sword addr,
 	Elf_Sym *near = NULL;
 	Elf64_Sword distance = 20;
 	Elf64_Sword d;
+	unsigned int relsym_secindex;
 
 	if (relsym->st_name != 0)
 		return relsym;
+
+	relsym_secindex = get_secindex(elf, relsym);
 	for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
-		if (sym->st_shndx != relsym->st_shndx)
+		if (get_secindex(elf, sym) != relsym_secindex)
 			continue;
 		if (ELF_ST_TYPE(sym->st_info) == STT_SECTION)
 			continue;
@@ -1113,9 +1184,9 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
 	for (sym = elf->symtab_start; sym < elf->symtab_stop; sym++) {
 		const char *symsec;
 
-		if (sym->st_shndx >= SHN_LORESERVE)
+		if (is_shndx_special(sym->st_shndx))
 			continue;
-		symsec = sec_name(elf, sym->st_shndx);
+		symsec = sec_name(elf, get_secindex(elf, sym));
 		if (strcmp(symsec, sec) != 0)
 			continue;
 		if (!is_valid_name(elf, sym))
@@ -1138,6 +1209,9 @@ static Elf_Sym *find_elf_symbol2(struct elf_info *elf, Elf_Addr addr,
  * .cpuinit.data => __cpudata
  * .memexitconst => __memconst
  * etc.
+ *
+ * The memory of returned value has been allocated on a heap. The user of this
+ * method should free it after usage.
 */
 static char *sec2annotation(const char *s)
 {
@@ -1160,9 +1234,9 @@ static char *sec2annotation(const char *s)
 			strcat(p, "data ");
 		else
 			strcat(p, " ");
-		return r; /* we leak her but we do not care */
+		return r;
 	} else {
-		return "";
+		return strdup("");
 	}
 }
 
@@ -1190,6 +1264,8 @@ static void report_sec_mismatch(const char *modname,
 {
 	const char *from, *from_p;
 	const char *to, *to_p;
+	char *prl_from;
+	char *prl_to;
 
 	switch (from_is_func) {
 	case 0: from = "variable"; from_p = "";   break;
@@ -1213,16 +1289,21 @@ static void report_sec_mismatch(const char *modname,
 
 	switch (mismatch->mismatch) {
 	case TEXT_TO_ANY_INIT:
+		prl_from = sec2annotation(fromsec);
+		prl_to = sec2annotation(tosec);
 		fprintf(stderr,
 		"The function %s%s() references\n"
 		"the %s %s%s%s.\n"
 		"This is often because %s lacks a %s\n"
 		"annotation or the annotation of %s is wrong.\n",
-		sec2annotation(fromsec), fromsym,
-		to, sec2annotation(tosec), tosym, to_p,
-		fromsym, sec2annotation(tosec), tosym);
+		prl_from, fromsym,
+		to, prl_to, tosym, to_p,
+		fromsym, prl_to, tosym);
+		free(prl_from);
+		free(prl_to);
 		break;
 	case DATA_TO_ANY_INIT: {
+		prl_to = sec2annotation(tosec);
 		const char *const *s = mismatch->symbol_white_list;
 		fprintf(stderr,
 		"The variable %s references\n"
@@ -1230,20 +1311,24 @@ static void report_sec_mismatch(const char *modname,
 		"If the reference is valid then annotate the\n"
 		"variable with __init* or __refdata (see linux/init.h) "
 		"or name the variable:\n",
-		fromsym, to, sec2annotation(tosec), tosym, to_p);
+		fromsym, to, prl_to, tosym, to_p);
 		while (*s)
 			fprintf(stderr, "%s, ", *s++);
 		fprintf(stderr, "\n");
+		free(prl_to);
 		break;
 	}
 	case TEXT_TO_ANY_EXIT:
+		prl_to = sec2annotation(tosec);
 		fprintf(stderr,
 		"The function %s() references a %s in an exit section.\n"
 		"Often the %s %s%s has valid usage outside the exit section\n"
 		"and the fix is to remove the %sannotation of %s.\n",
-		fromsym, to, to, tosym, to_p, sec2annotation(tosec), tosym);
+		fromsym, to, to, tosym, to_p, prl_to, tosym);
+		free(prl_to);
 		break;
 	case DATA_TO_ANY_EXIT: {
+		prl_to = sec2annotation(tosec);
 		const char *const *s = mismatch->symbol_white_list;
 		fprintf(stderr,
 		"The variable %s references\n"
@@ -1251,24 +1336,31 @@ static void report_sec_mismatch(const char *modname,
 		"If the reference is valid then annotate the\n"
 		"variable with __exit* (see linux/init.h) or "
 		"name the variable:\n",
-		fromsym, to, sec2annotation(tosec), tosym, to_p);
+		fromsym, to, prl_to, tosym, to_p);
 		while (*s)
 			fprintf(stderr, "%s, ", *s++);
 		fprintf(stderr, "\n");
+		free(prl_to);
 		break;
 	}
 	case XXXINIT_TO_SOME_INIT:
 	case XXXEXIT_TO_SOME_EXIT:
+		prl_from = sec2annotation(fromsec);
+		prl_to = sec2annotation(tosec);
 		fprintf(stderr,
 		"The %s %s%s%s references\n"
 		"a %s %s%s%s.\n"
 		"If %s is only used by %s then\n"
 		"annotate %s with a matching annotation.\n",
-		from, sec2annotation(fromsec), fromsym, from_p,
-		to, sec2annotation(tosec), tosym, to_p,
+		from, prl_from, fromsym, from_p,
+		to, prl_to, tosym, to_p,
 		tosym, fromsym, tosym);
+		free(prl_from);
+		free(prl_to);
 		break;
 	case ANY_INIT_TO_ANY_EXIT:
+		prl_from = sec2annotation(fromsec);
+		prl_to = sec2annotation(tosec);
 		fprintf(stderr,
 		"The %s %s%s%s references\n"
 		"a %s %s%s%s.\n"
@@ -1277,11 +1369,15 @@ static void report_sec_mismatch(const char *modname,
 		"uses functionality in the exit path.\n"
 		"The fix is often to remove the %sannotation of\n"
 		"%s%s so it may be used outside an exit section.\n",
-		from, sec2annotation(fromsec), fromsym, from_p,
-		to, sec2annotation(tosec), tosym, to_p,
-		sec2annotation(tosec), tosym, to_p);
+		from, prl_from, fromsym, from_p,
+		to, prl_to, tosym, to_p,
+		prl_to, tosym, to_p);
+		free(prl_from);
+		free(prl_to);
 		break;
 	case ANY_EXIT_TO_ANY_INIT:
+		prl_from = sec2annotation(fromsec);
+		prl_to = sec2annotation(tosec);
 		fprintf(stderr,
 		"The %s %s%s%s references\n"
 		"a %s %s%s%s.\n"
@@ -1290,16 +1386,20 @@ static void report_sec_mismatch(const char *modname,
 		"uses functionality in the init path.\n"
 		"The fix is often to remove the %sannotation of\n"
 		"%s%s so it may be used outside an init section.\n",
-		from, sec2annotation(fromsec), fromsym, from_p,
-		to, sec2annotation(tosec), tosym, to_p,
-		sec2annotation(tosec), tosym, to_p);
+		from, prl_from, fromsym, from_p,
+		to, prl_to, tosym, to_p,
+		prl_to, tosym, to_p);
+		free(prl_from);
+		free(prl_to);
 		break;
 	case EXPORT_TO_INIT_EXIT:
+		prl_to = sec2annotation(tosec);
 		fprintf(stderr,
 		"The symbol %s is exported and annotated %s\n"
 		"Fix this by removing the %sannotation of %s "
 		"or drop the export.\n",
-		tosym, sec2annotation(tosec), sec2annotation(tosec), tosym);
+		tosym, prl_to, prl_to, tosym);
+		free(prl_to);
 		break;
 	}
 	fprintf(stderr, "\n");
@@ -1311,7 +1411,7 @@ static void check_section_mismatch(const char *modname, struct elf_info *elf,
 	const char *tosec;
 	const struct sectioncheck *mismatch;
 
-	tosec = sec_name(elf, sym->st_shndx);
+	tosec = sec_name(elf, get_secindex(elf, sym));
 	mismatch = section_mismatch(fromsec, tosec);
 	if (mismatch) {
 		Elf_Sym *to;
@@ -1339,10 +1439,10 @@ static unsigned int *reloc_location(struct elf_info *elf,
 				    Elf_Shdr *sechdr, Elf_Rela *r)
 {
 	Elf_Shdr *sechdrs = elf->sechdrs;
-	int section = sechdr->sh_info;
+	int section = shndx2secindex(sechdr->sh_info);
 
 	return (void *)elf->hdr + sechdrs[section].sh_offset +
-		(r->r_offset - sechdrs[section].sh_addr);
+		r->r_offset;
 }
 
 static int addend_386_rel(struct elf_info *elf, Elf_Shdr *sechdr, Elf_Rela *r)
@@ -1447,7 +1547,7 @@ static void section_rela(const char *modname, struct elf_info *elf,
 		r.r_addend = TO_NATIVE(rela->r_addend);
 		sym = elf->symtab_start + r_sym;
 		/* Skip special sections */
-		if (sym->st_shndx >= SHN_LORESERVE)
+		if (is_shndx_special(sym->st_shndx))
 			continue;
 		check_section_mismatch(modname, elf, &r, sym, fromsec);
 	}
@@ -1505,7 +1605,7 @@ static void section_rel(const char *modname, struct elf_info *elf,
 		}
 		sym = elf->symtab_start + r_sym;
 		/* Skip special sections */
-		if (sym->st_shndx >= SHN_LORESERVE)
+		if (is_shndx_special(sym->st_shndx))
 			continue;
 		check_section_mismatch(modname, elf, &r, sym, fromsec);
 	}
@@ -1515,7 +1615,7 @@ static void section_rel(const char *modname, struct elf_info *elf,
  * A module includes a number of sections that are discarded
  * either when loaded or when used as built-in.
  * For loaded modules all functions marked __init and all data
- * marked __initdata will be discarded when the module has been intialized.
+ * marked __initdata will be discarded when the module has been initialized.
  * Likewise for modules used built-in the sections marked __exit
  * are discarded because __exit marked function are supposed to be called
  * only when a module is unloaded which never happens for built-in modules.
@@ -1530,7 +1630,7 @@ static void check_sec_ref(struct module *mod, const char *modname,
 	Elf_Shdr *sechdrs = elf->sechdrs;
 
 	/* Walk through all sections */
-	for (i = 0; i < elf->hdr->e_shnum; i++) {
+	for (i = 0; i < elf->num_sections; i++) {
 		check_section(modname, elf, &elf->sechdrs[i]);
 		/* We want to process only relocation sections and not .init */
 		if (sechdrs[i].sh_type == SHT_RELA)