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authorRusty Russell <rusty@rustcorp.com.au>2010-08-05 12:59:10 -0600
committerRusty Russell <rusty@rustcorp.com.au>2010-08-05 12:59:10 +0930
commit49668688dd5a5f46c72f965835388ed16c596055 (patch)
treeda42c22348941617e65227a6ef48f1937d840fcc /kernel
parent36b0360d17dc3928cc96347a18a3a1cdbb7e506d (diff)
downloadvexpress-lsk-49668688dd5a5f46c72f965835388ed16c596055.tar.gz
module: pass load_info into other functions
Pass the struct load_info into all the other functions in module loading. This neatens things and makes them more consistent. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/module.c372
1 files changed, 157 insertions, 215 deletions
diff --git a/kernel/module.c b/kernel/module.c
index a64b26cf187..29dd232f818 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -152,42 +152,38 @@ void __module_put_and_exit(struct module *mod, long code)
EXPORT_SYMBOL(__module_put_and_exit);
/* Find a module section: 0 means not found. */
-static unsigned int find_sec(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings,
- const char *name)
+static unsigned int find_sec(const struct load_info *info, const char *name)
{
unsigned int i;
- for (i = 1; i < hdr->e_shnum; i++)
+ for (i = 1; i < info->hdr->e_shnum; i++) {
+ Elf_Shdr *shdr = &info->sechdrs[i];
/* Alloc bit cleared means "ignore it." */
- if ((sechdrs[i].sh_flags & SHF_ALLOC)
- && strcmp(secstrings+sechdrs[i].sh_name, name) == 0)
+ if ((shdr->sh_flags & SHF_ALLOC)
+ && strcmp(info->secstrings + shdr->sh_name, name) == 0)
return i;
+ }
return 0;
}
/* Find a module section, or NULL. */
-static void *section_addr(Elf_Ehdr *hdr, Elf_Shdr *shdrs,
- const char *secstrings, const char *name)
+static void *section_addr(const struct load_info *info, const char *name)
{
/* Section 0 has sh_addr 0. */
- return (void *)shdrs[find_sec(hdr, shdrs, secstrings, name)].sh_addr;
+ return (void *)info->sechdrs[find_sec(info, name)].sh_addr;
}
/* Find a module section, or NULL. Fill in number of "objects" in section. */
-static void *section_objs(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings,
+static void *section_objs(const struct load_info *info,
const char *name,
size_t object_size,
unsigned int *num)
{
- unsigned int sec = find_sec(hdr, sechdrs, secstrings, name);
+ unsigned int sec = find_sec(info, name);
/* Section 0 has sh_addr 0 and sh_size 0. */
- *num = sechdrs[sec].sh_size / object_size;
- return (void *)sechdrs[sec].sh_addr;
+ *num = info->sechdrs[sec].sh_size / object_size;
+ return (void *)info->sechdrs[sec].sh_addr;
}
/* Provided by the linker */
@@ -417,11 +413,9 @@ static void percpu_modfree(struct module *mod)
free_percpu(mod->percpu);
}
-static unsigned int find_pcpusec(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings)
+static unsigned int find_pcpusec(struct load_info *info)
{
- return find_sec(hdr, sechdrs, secstrings, ".data..percpu");
+ return find_sec(info, ".data..percpu");
}
static void percpu_modcopy(struct module *mod,
@@ -481,9 +475,7 @@ static inline int percpu_modalloc(struct module *mod,
static inline void percpu_modfree(struct module *mod)
{
}
-static inline unsigned int find_pcpusec(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings)
+static unsigned int find_pcpusec(struct load_info *info)
{
return 0;
}
@@ -1067,10 +1059,9 @@ static inline int same_magic(const char *amagic, const char *bmagic,
#endif /* CONFIG_MODVERSIONS */
/* Resolve a symbol for this module. I.e. if we find one, record usage. */
-static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs,
- unsigned int versindex,
+static const struct kernel_symbol *resolve_symbol(struct module *mod,
+ const struct load_info *info,
const char *name,
- struct module *mod,
char ownername[])
{
struct module *owner;
@@ -1084,7 +1075,8 @@ static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs,
if (!sym)
goto unlock;
- if (!check_version(sechdrs, versindex, name, mod, crc, owner)) {
+ if (!check_version(info->sechdrs, info->index.vers, name, mod, crc,
+ owner)) {
sym = ERR_PTR(-EINVAL);
goto getname;
}
@@ -1103,21 +1095,20 @@ unlock:
return sym;
}
-static const struct kernel_symbol *resolve_symbol_wait(Elf_Shdr *sechdrs,
- unsigned int versindex,
- const char *name,
- struct module *mod)
+static const struct kernel_symbol *
+resolve_symbol_wait(struct module *mod,
+ const struct load_info *info,
+ const char *name)
{
const struct kernel_symbol *ksym;
- char ownername[MODULE_NAME_LEN];
+ char owner[MODULE_NAME_LEN];
if (wait_event_interruptible_timeout(module_wq,
- !IS_ERR(ksym = resolve_symbol(sechdrs, versindex, name,
- mod, ownername)) ||
- PTR_ERR(ksym) != -EBUSY,
+ !IS_ERR(ksym = resolve_symbol(mod, info, name, owner))
+ || PTR_ERR(ksym) != -EBUSY,
30 * HZ) <= 0) {
printk(KERN_WARNING "%s: gave up waiting for init of module %s.\n",
- mod->name, ownername);
+ mod->name, owner);
}
return ksym;
}
@@ -1640,25 +1631,23 @@ static int verify_export_symbols(struct module *mod)
}
/* Change all symbols so that st_value encodes the pointer directly. */
-static int simplify_symbols(Elf_Shdr *sechdrs,
- unsigned int symindex,
- const char *strtab,
- unsigned int versindex,
- unsigned int pcpuindex,
- struct module *mod)
-{
- Elf_Sym *sym = (void *)sechdrs[symindex].sh_addr;
+static int simplify_symbols(struct module *mod, const struct load_info *info)
+{
+ Elf_Shdr *symsec = &info->sechdrs[info->index.sym];
+ Elf_Sym *sym = (void *)symsec->sh_addr;
unsigned long secbase;
- unsigned int i, n = sechdrs[symindex].sh_size / sizeof(Elf_Sym);
+ unsigned int i;
int ret = 0;
const struct kernel_symbol *ksym;
- for (i = 1; i < n; i++) {
+ for (i = 1; i < symsec->sh_size / sizeof(Elf_Sym); i++) {
+ const char *name = info->strtab + sym[i].st_name;
+
switch (sym[i].st_shndx) {
case SHN_COMMON:
/* We compiled with -fno-common. These are not
supposed to happen. */
- DEBUGP("Common symbol: %s\n", strtab + sym[i].st_name);
+ DEBUGP("Common symbol: %s\n", name);
printk("%s: please compile with -fno-common\n",
mod->name);
ret = -ENOEXEC;
@@ -1671,9 +1660,7 @@ static int simplify_symbols(Elf_Shdr *sechdrs,
break;
case SHN_UNDEF:
- ksym = resolve_symbol_wait(sechdrs, versindex,
- strtab + sym[i].st_name,
- mod);
+ ksym = resolve_symbol_wait(mod, info, name);
/* Ok if resolved. */
if (ksym && !IS_ERR(ksym)) {
sym[i].st_value = ksym->value;
@@ -1685,17 +1672,16 @@ static int simplify_symbols(Elf_Shdr *sechdrs,
break;
printk(KERN_WARNING "%s: Unknown symbol %s (err %li)\n",
- mod->name, strtab + sym[i].st_name,
- PTR_ERR(ksym));
+ mod->name, name, PTR_ERR(ksym));
ret = PTR_ERR(ksym) ?: -ENOENT;
break;
default:
/* Divert to percpu allocation if a percpu var. */
- if (sym[i].st_shndx == pcpuindex)
+ if (sym[i].st_shndx == info->index.pcpu)
secbase = (unsigned long)mod_percpu(mod);
else
- secbase = sechdrs[sym[i].st_shndx].sh_addr;
+ secbase = info->sechdrs[sym[i].st_shndx].sh_addr;
sym[i].st_value += secbase;
break;
}
@@ -1704,33 +1690,29 @@ static int simplify_symbols(Elf_Shdr *sechdrs,
return ret;
}
-static int apply_relocations(struct module *mod,
- Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- unsigned int symindex,
- unsigned int strindex)
+static int apply_relocations(struct module *mod, const struct load_info *info)
{
unsigned int i;
int err = 0;
/* Now do relocations. */
- for (i = 1; i < hdr->e_shnum; i++) {
- const char *strtab = (char *)sechdrs[strindex].sh_addr;
- unsigned int info = sechdrs[i].sh_info;
+ for (i = 1; i < info->hdr->e_shnum; i++) {
+ unsigned int infosec = info->sechdrs[i].sh_info;
/* Not a valid relocation section? */
- if (info >= hdr->e_shnum)
+ if (infosec >= info->hdr->e_shnum)
continue;
/* Don't bother with non-allocated sections */
- if (!(sechdrs[info].sh_flags & SHF_ALLOC))
+ if (!(info->sechdrs[infosec].sh_flags & SHF_ALLOC))
continue;
- if (sechdrs[i].sh_type == SHT_REL)
- err = apply_relocate(sechdrs, strtab, symindex, i, mod);
- else if (sechdrs[i].sh_type == SHT_RELA)
- err = apply_relocate_add(sechdrs, strtab, symindex, i,
- mod);
+ if (info->sechdrs[i].sh_type == SHT_REL)
+ err = apply_relocate(info->sechdrs, info->strtab,
+ info->index.sym, i, mod);
+ else if (info->sechdrs[i].sh_type == SHT_RELA)
+ err = apply_relocate_add(info->sechdrs, info->strtab,
+ info->index.sym, i, mod);
if (err < 0)
break;
}
@@ -1761,10 +1743,7 @@ static long get_offset(struct module *mod, unsigned int *size,
might -- code, read-only data, read-write data, small data. Tally
sizes, and place the offsets into sh_entsize fields: high bit means it
belongs in init. */
-static void layout_sections(struct module *mod,
- const Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings)
+static void layout_sections(struct module *mod, struct load_info *info)
{
static unsigned long const masks[][2] = {
/* NOTE: all executable code must be the first section
@@ -1777,21 +1756,22 @@ static void layout_sections(struct module *mod,
};
unsigned int m, i;
- for (i = 0; i < hdr->e_shnum; i++)
- sechdrs[i].sh_entsize = ~0UL;
+ for (i = 0; i < info->hdr->e_shnum; i++)
+ info->sechdrs[i].sh_entsize = ~0UL;
DEBUGP("Core section allocation order:\n");
for (m = 0; m < ARRAY_SIZE(masks); ++m) {
- for (i = 0; i < hdr->e_shnum; ++i) {
- Elf_Shdr *s = &sechdrs[i];
+ for (i = 0; i < info->hdr->e_shnum; ++i) {
+ Elf_Shdr *s = &info->sechdrs[i];
+ const char *sname = info->secstrings + s->sh_name;
if ((s->sh_flags & masks[m][0]) != masks[m][0]
|| (s->sh_flags & masks[m][1])
|| s->sh_entsize != ~0UL
- || strstarts(secstrings + s->sh_name, ".init"))
+ || strstarts(sname, ".init"))
continue;
s->sh_entsize = get_offset(mod, &mod->core_size, s, i);
- DEBUGP("\t%s\n", secstrings + s->sh_name);
+ DEBUGP("\t%s\n", name);
}
if (m == 0)
mod->core_text_size = mod->core_size;
@@ -1799,17 +1779,18 @@ static void layout_sections(struct module *mod,
DEBUGP("Init section allocation order:\n");
for (m = 0; m < ARRAY_SIZE(masks); ++m) {
- for (i = 0; i < hdr->e_shnum; ++i) {
- Elf_Shdr *s = &sechdrs[i];
+ for (i = 0; i < info->hdr->e_shnum; ++i) {
+ Elf_Shdr *s = &info->sechdrs[i];
+ const char *sname = info->secstrings + s->sh_name;
if ((s->sh_flags & masks[m][0]) != masks[m][0]
|| (s->sh_flags & masks[m][1])
|| s->sh_entsize != ~0UL
- || !strstarts(secstrings + s->sh_name, ".init"))
+ || !strstarts(sname, ".init"))
continue;
s->sh_entsize = (get_offset(mod, &mod->init_size, s, i)
| INIT_OFFSET_MASK);
- DEBUGP("\t%s\n", secstrings + s->sh_name);
+ DEBUGP("\t%s\n", sname);
}
if (m == 0)
mod->init_text_size = mod->init_size;
@@ -1848,33 +1829,28 @@ static char *next_string(char *string, unsigned long *secsize)
return string;
}
-static char *get_modinfo(const Elf_Shdr *sechdrs,
- unsigned int info,
- const char *tag)
+static char *get_modinfo(struct load_info *info, const char *tag)
{
char *p;
unsigned int taglen = strlen(tag);
- unsigned long size = sechdrs[info].sh_size;
+ Elf_Shdr *infosec = &info->sechdrs[info->index.info];
+ unsigned long size = infosec->sh_size;
- for (p = (char *)sechdrs[info].sh_addr; p; p = next_string(p, &size)) {
+ for (p = (char *)infosec->sh_addr; p; p = next_string(p, &size)) {
if (strncmp(p, tag, taglen) == 0 && p[taglen] == '=')
return p + taglen + 1;
}
return NULL;
}
-static void setup_modinfo(struct module *mod, Elf_Shdr *sechdrs,
- unsigned int infoindex)
+static void setup_modinfo(struct module *mod, struct load_info *info)
{
struct module_attribute *attr;
int i;
for (i = 0; (attr = modinfo_attrs[i]); i++) {
if (attr->setup)
- attr->setup(mod,
- get_modinfo(sechdrs,
- infoindex,
- attr->attr.name));
+ attr->setup(mod, get_modinfo(info, attr->attr.name));
}
}
@@ -1976,56 +1952,45 @@ static bool is_core_symbol(const Elf_Sym *src, const Elf_Shdr *sechdrs,
return true;
}
-static unsigned long layout_symtab(struct module *mod,
- Elf_Shdr *sechdrs,
- unsigned int symindex,
- unsigned int strindex,
- const Elf_Ehdr *hdr,
- const char *secstrings,
- unsigned long *pstroffs,
- unsigned long *strmap)
+static void layout_symtab(struct module *mod, struct load_info *info)
{
- unsigned long symoffs;
- Elf_Shdr *symsect = sechdrs + symindex;
- Elf_Shdr *strsect = sechdrs + strindex;
+ Elf_Shdr *symsect = info->sechdrs + info->index.sym;
+ Elf_Shdr *strsect = info->sechdrs + info->index.str;
const Elf_Sym *src;
- const char *strtab;
unsigned int i, nsrc, ndst;
/* Put symbol section at end of init part of module. */
symsect->sh_flags |= SHF_ALLOC;
symsect->sh_entsize = get_offset(mod, &mod->init_size, symsect,
- symindex) | INIT_OFFSET_MASK;
- DEBUGP("\t%s\n", secstrings + symsect->sh_name);
+ info->index.sym) | INIT_OFFSET_MASK;
+ DEBUGP("\t%s\n", info->secstrings + symsect->sh_name);
- src = (void *)hdr + symsect->sh_offset;
+ src = (void *)info->hdr + symsect->sh_offset;
nsrc = symsect->sh_size / sizeof(*src);
- strtab = (void *)hdr + strsect->sh_offset;
for (ndst = i = 1; i < nsrc; ++i, ++src)
- if (is_core_symbol(src, sechdrs, hdr->e_shnum)) {
+ if (is_core_symbol(src, info->sechdrs, info->hdr->e_shnum)) {
unsigned int j = src->st_name;
- while(!__test_and_set_bit(j, strmap) && strtab[j])
+ while (!__test_and_set_bit(j, info->strmap)
+ && info->strtab[j])
++j;
++ndst;
}
/* Append room for core symbols at end of core part. */
- symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1);
- mod->core_size = symoffs + ndst * sizeof(Elf_Sym);
+ info->symoffs = ALIGN(mod->core_size, symsect->sh_addralign ?: 1);
+ mod->core_size = info->symoffs + ndst * sizeof(Elf_Sym);
/* Put string table section at end of init part of module. */
strsect->sh_flags |= SHF_ALLOC;
strsect->sh_entsize = get_offset(mod, &mod->init_size, strsect,
- strindex) | INIT_OFFSET_MASK;
- DEBUGP("\t%s\n", secstrings + strsect->sh_name);
+ info->index.str) | INIT_OFFSET_MASK;
+ DEBUGP("\t%s\n", info->secstrings + strsect->sh_name);
/* Append room for core symbols' strings at end of core part. */
- *pstroffs = mod->core_size;
- __set_bit(0, strmap);
- mod->core_size += bitmap_weight(strmap, strsect->sh_size);
-
- return symoffs;
+ info->stroffs = mod->core_size;
+ __set_bit(0, info->strmap);
+ mod->core_size += bitmap_weight(info->strmap, strsect->sh_size);
}
static void add_kallsyms(struct module *mod, struct load_info *info)
@@ -2064,16 +2029,8 @@ static void add_kallsyms(struct module *mod, struct load_info *info)
*++s = mod->strtab[i];
}
#else
-static inline unsigned long layout_symtab(struct module *mod,
- Elf_Shdr *sechdrs,
- unsigned int symindex,
- unsigned int strindex,
- const Elf_Ehdr *hdr,
- const char *secstrings,
- unsigned long *pstroffs,
- unsigned long *strmap)
+static inline void layout_symtab(struct module *mod, struct load_info *info)
{
- return 0;
}
static void add_kallsyms(struct module *mod, struct load_info *info)
@@ -2113,30 +2070,28 @@ static void *module_alloc_update_bounds(unsigned long size)
}
#ifdef CONFIG_DEBUG_KMEMLEAK
-static void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr,
- const Elf_Shdr *sechdrs,
- const char *secstrings)
+static void kmemleak_load_module(const struct module *mod,
+ const struct load_info *info)
{
unsigned int i;
/* only scan the sections containing data */
kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL);
- for (i = 1; i < hdr->e_shnum; i++) {
- if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+ for (i = 1; i < info->hdr->e_shnum; i++) {
+ const char *name = info->secstrings + info->sechdrs[i].sh_name;
+ if (!(info->sechdrs[i].sh_flags & SHF_ALLOC))
continue;
- if (strncmp(secstrings + sechdrs[i].sh_name, ".data", 5) != 0
- && strncmp(secstrings + sechdrs[i].sh_name, ".bss", 4) != 0)
+ if (!strstarts(name, ".data") && !strstarts(name, ".bss"))
continue;
- kmemleak_scan_area((void *)sechdrs[i].sh_addr,
- sechdrs[i].sh_size, GFP_KERNEL);
+ kmemleak_scan_area((void *)info->sechdrs[i].sh_addr,
+ info->sechdrs[i].sh_size, GFP_KERNEL);
}
}
#else
-static inline void kmemleak_load_module(struct module *mod, Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- const char *secstrings)
+static inline void kmemleak_load_module(const struct module *mod,
+ const struct load_info *info)
{
}
#endif
@@ -2227,8 +2182,8 @@ static int rewrite_section_headers(struct load_info *info)
}
/* Track but don't keep modinfo and version sections. */
- info->index.vers = find_sec(info->hdr, info->sechdrs, info->secstrings, "__versions");
- info->index.info = find_sec(info->hdr, info->sechdrs, info->secstrings, ".modinfo");
+ info->index.vers = find_sec(info, "__versions");
+ info->index.info = find_sec(info, ".modinfo");
info->sechdrs[info->index.info].sh_flags &= ~(unsigned long)SHF_ALLOC;
info->sechdrs[info->index.vers].sh_flags &= ~(unsigned long)SHF_ALLOC;
return 0;
@@ -2268,8 +2223,7 @@ static struct module *setup_load_info(struct load_info *info)
}
}
- info->index.mod = find_sec(info->hdr, info->sechdrs, info->secstrings,
- ".gnu.linkonce.this_module");
+ info->index.mod = find_sec(info, ".gnu.linkonce.this_module");
if (!info->index.mod) {
printk(KERN_WARNING "No module found in object\n");
return ERR_PTR(-ENOEXEC);
@@ -2283,7 +2237,7 @@ static struct module *setup_load_info(struct load_info *info)
return ERR_PTR(-ENOEXEC);
}
- info->index.pcpu = find_pcpusec(info->hdr, info->sechdrs, info->secstrings);
+ info->index.pcpu = find_pcpusec(info);
/* Check module struct version now, before we try to use module. */
if (!check_modstruct_version(info->sechdrs, info->index.vers, mod))
@@ -2292,11 +2246,9 @@ static struct module *setup_load_info(struct load_info *info)
return mod;
}
-static int check_modinfo(struct module *mod,
- const Elf_Shdr *sechdrs,
- unsigned int infoindex, unsigned int versindex)
+static int check_modinfo(struct module *mod, struct load_info *info)
{
- const char *modmagic = get_modinfo(sechdrs, infoindex, "vermagic");
+ const char *modmagic = get_modinfo(info, "vermagic");
int err;
/* This is allowed: modprobe --force will invalidate it. */
@@ -2304,13 +2256,13 @@ static int check_modinfo(struct module *mod,
err = try_to_force_load(mod, "bad vermagic");
if (err)
return err;
- } else if (!same_magic(modmagic, vermagic, versindex)) {
+ } else if (!same_magic(modmagic, vermagic, info->index.vers)) {
printk(KERN_ERR "%s: version magic '%s' should be '%s'\n",
mod->name, modmagic, vermagic);
return -ENOEXEC;
}
- if (get_modinfo(sechdrs, infoindex, "staging")) {
+ if (get_modinfo(info, "staging")) {
add_taint_module(mod, TAINT_CRAP);
printk(KERN_WARNING "%s: module is from the staging directory,"
" the quality is unknown, you have been warned.\n",
@@ -2318,58 +2270,51 @@ static int check_modinfo(struct module *mod,
}
/* Set up license info based on the info section */
- set_license(mod, get_modinfo(sechdrs, infoindex, "license"));
+ set_license(mod, get_modinfo(info, "license"));
return 0;
}
-static void find_module_sections(struct module *mod, Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs, const char *secstrings)
+static void find_module_sections(struct module *mod,
+ const struct load_info *info)
{
- mod->kp = section_objs(hdr, sechdrs, secstrings, "__param",
+ mod->kp = section_objs(info, "__param",
sizeof(*mod->kp), &mod->num_kp);
- mod->syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab",
+ mod->syms = section_objs(info, "__ksymtab",
sizeof(*mod->syms), &mod->num_syms);
- mod->crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab");
- mod->gpl_syms = section_objs(hdr, sechdrs, secstrings, "__ksymtab_gpl",
+ mod->crcs = section_addr(info, "__kcrctab");
+ mod->gpl_syms = section_objs(info, "__ksymtab_gpl",
sizeof(*mod->gpl_syms),
&mod->num_gpl_syms);
- mod->gpl_crcs = section_addr(hdr, sechdrs, secstrings, "__kcrctab_gpl");
- mod->gpl_future_syms = section_objs(hdr, sechdrs, secstrings,
+ mod->gpl_crcs = section_addr(info, "__kcrctab_gpl");
+ mod->gpl_future_syms = section_objs(info,
"__ksymtab_gpl_future",
sizeof(*mod->gpl_future_syms),
&mod->num_gpl_future_syms);
- mod->gpl_future_crcs = section_addr(hdr, sechdrs, secstrings,
- "__kcrctab_gpl_future");
+ mod->gpl_future_crcs = section_addr(info, "__kcrctab_gpl_future");
#ifdef CONFIG_UNUSED_SYMBOLS
- mod->unused_syms = section_objs(hdr, sechdrs, secstrings,
- "__ksymtab_unused",
+ mod->unused_syms = section_objs(info, "__ksymtab_unused",
sizeof(*mod->unused_syms),
&mod->num_unused_syms);
- mod->unused_crcs = section_addr(hdr, sechdrs, secstrings,
- "__kcrctab_unused");
- mod->unused_gpl_syms = section_objs(hdr, sechdrs, secstrings,
- "__ksymtab_unused_gpl",
+ mod->unused_crcs = section_addr(info, "__kcrctab_unused");
+ mod->unused_gpl_syms = section_objs(info, "__ksymtab_unused_gpl",
sizeof(*mod->unused_gpl_syms),
&mod->num_unused_gpl_syms);
- mod->unused_gpl_crcs = section_addr(hdr, sechdrs, secstrings,
- "__kcrctab_unused_gpl");
+ mod->unused_gpl_crcs = section_addr(info, "__kcrctab_unused_gpl");
#endif
#ifdef CONFIG_CONSTRUCTORS
- mod->ctors = section_objs(hdr, sechdrs, secstrings, ".ctors",
+ mod->ctors = section_objs(info, ".ctors",
sizeof(*mod->ctors), &mod->num_ctors);
#endif
#ifdef CONFIG_TRACEPOINTS
- mod->tracepoints = section_objs(hdr, sechdrs, secstrings,
- "__tracepoints",
+ mod->tracepoints = section_objs(info, "__tracepoints",
sizeof(*mod->tracepoints),
&mod->num_tracepoints);
#endif
#ifdef CONFIG_EVENT_TRACING
- mod->trace_events = section_objs(hdr, sechdrs, secstrings,
- "_ftrace_events",
+ mod->trace_events = section_objs(info, "_ftrace_events",
sizeof(*mod->trace_events),
&mod->num_trace_events);
/*
@@ -2381,20 +2326,17 @@ static void find_module_sections(struct module *mod, Elf_Ehdr *hdr,
#endif
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
/* sechdrs[0].sh_size is always zero */
- mod->ftrace_callsites = section_objs(hdr, sechdrs, secstrings,
- "__mcount_loc",
+ mod->ftrace_callsites = section_objs(info, "__mcount_loc",
sizeof(*mod->ftrace_callsites),
&mod->num_ftrace_callsites);
#endif
- if (section_addr(hdr, sechdrs, secstrings, "__obsparm"))
+ if (section_addr(info, "__obsparm"))
printk(KERN_WARNING "%s: Ignoring obsolete parameters\n",
mod->name);
}
-static int move_module(struct module *mod,
- Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
- const char *secstrings, unsigned modindex)
+static int move_module(struct module *mod, struct load_info *info)
{
int i;
void *ptr;
@@ -2430,32 +2372,31 @@ static int move_module(struct module *mod,
/* Transfer each section which specifies SHF_ALLOC */
DEBUGP("final section addresses:\n");
- for (i = 0; i < hdr->e_shnum; i++) {
+ for (i = 0; i < info->hdr->e_shnum; i++) {
void *dest;
+ Elf_Shdr *shdr = &info->sechdrs[i];
- if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+ if (!(shdr->sh_flags & SHF_ALLOC))
continue;
- if (sechdrs[i].sh_entsize & INIT_OFFSET_MASK)
+ if (shdr->sh_entsize & INIT_OFFSET_MASK)
dest = mod->module_init
- + (sechdrs[i].sh_entsize & ~INIT_OFFSET_MASK);
+ + (shdr->sh_entsize & ~INIT_OFFSET_MASK);
else
- dest = mod->module_core + sechdrs[i].sh_entsize;
+ dest = mod->module_core + shdr->sh_entsize;
- if (sechdrs[i].sh_type != SHT_NOBITS)
- memcpy(dest, (void *)sechdrs[i].sh_addr,
- sechdrs[i].sh_size);
+ if (shdr->sh_type != SHT_NOBITS)
+ memcpy(dest, (void *)shdr->sh_addr, shdr->sh_size);
/* Update sh_addr to point to copy in image. */
- sechdrs[i].sh_addr = (unsigned long)dest;
+ shdr->sh_addr = (unsigned long)dest;
DEBUGP("\t0x%lx %s\n",
- sechdrs[i].sh_addr, secstrings + sechdrs[i].sh_name);
+ shdr->sh_addr, info->secstrings + shdr->sh_name);
}
return 0;
}
-static int check_module_license_and_versions(struct module *mod,
- Elf_Shdr *sechdrs)
+static int check_module_license_and_versions(struct module *mod)
{
/*
* ndiswrapper is under GPL by itself, but loads proprietary modules.
@@ -2512,34 +2453,37 @@ static struct module *layout_and_allocate(struct load_info *info)
{
/* Module within temporary copy. */
struct module *mod;
+ Elf_Shdr *pcpusec;
int err;
mod = setup_load_info(info);
if (IS_ERR(mod))
return mod;
- err = check_modinfo(mod, info->sechdrs, info->index.info, info->index.vers);
+ err = check_modinfo(mod, info);
if (err)
return ERR_PTR(err);
/* Allow arches to frob section contents and sizes. */
- err = module_frob_arch_sections(info->hdr, info->sechdrs, info->secstrings, mod);
+ err = module_frob_arch_sections(info->hdr, info->sechdrs,
+ info->secstrings, mod);
if (err < 0)
goto free_args;
- if (info->index.pcpu) {
+ pcpusec = &info->sechdrs[info->index.pcpu];
+ if (pcpusec->sh_size) {
/* We have a special allocation for this section. */
- err = percpu_modalloc(mod, info->sechdrs[info->index.pcpu].sh_size,
- info->sechdrs[info->index.pcpu].sh_addralign);
+ err = percpu_modalloc(mod,
+ pcpusec->sh_size, pcpusec->sh_addralign);
if (err)
goto free_args;
- info->sechdrs[info->index.pcpu].sh_flags &= ~(unsigned long)SHF_ALLOC;
+ pcpusec->sh_flags &= ~(unsigned long)SHF_ALLOC;
}
/* Determine total sizes, and put offsets in sh_entsize. For now
this is done generically; there doesn't appear to be any
special cases for the architectures. */
- layout_sections(mod, info->hdr, info->sechdrs, info->secstrings);
+ layout_sections(mod, info);
info->strmap = kzalloc(BITS_TO_LONGS(info->sechdrs[info->index.str].sh_size)
* sizeof(long), GFP_KERNEL);
@@ -2547,17 +2491,16 @@ static struct module *layout_and_allocate(struct load_info *info)
err = -ENOMEM;
goto free_percpu;
}
- info->symoffs = layout_symtab(mod, info->sechdrs, info->index.sym, info->index.str, info->hdr,
- info->secstrings, &info->stroffs, info->strmap);
+ layout_symtab(mod, info);
/* Allocate and move to the final place */
- err = move_module(mod, info->hdr, info->sechdrs, info->secstrings, info->index.mod);
+ err = move_module(mod, info);
if (err)
goto free_strmap;
/* Module has been copied to its final place now: return it. */
mod = (void *)info->sechdrs[info->index.mod].sh_addr;
- kmemleak_load_module(mod, info->hdr, info->sechdrs, info->secstrings);
+ kmemleak_load_module(mod, info);
return mod;
free_strmap:
@@ -2605,34 +2548,33 @@ static noinline struct module *load_module(void __user *umod,
goto free_copy;
}
- /* Now we've moved module, initialize linked lists, etc. */
+ /* Now module is in final location, initialize linked lists, etc. */
err = module_unload_init(mod);
if (err)
goto free_module;
/* Now we've got everything in the final locations, we can
* find optional sections. */
- find_module_sections(mod, info.hdr, info.sechdrs, info.secstrings);
+ find_module_sections(mod, &info);
- err = check_module_license_and_versions(mod, info.sechdrs);
+ err = check_module_license_and_versions(mod);
if (err)
goto free_unload;
/* Set up MODINFO_ATTR fields */
- setup_modinfo(mod, info.sechdrs, info.index.info);
+ setup_modinfo(mod, &info);
/* Fix up syms, so that st_value is a pointer to location. */
- err = simplify_symbols(info.sechdrs, info.index.sym, info.strtab, info.index.vers, info.index.pcpu,
- mod);
+ err = simplify_symbols(mod, &info);
if (err < 0)
goto free_modinfo;
- err = apply_relocations(mod, info.hdr, info.sechdrs, info.index.sym, info.index.str);
+ err = apply_relocations(mod, &info);
if (err < 0)
goto free_modinfo;
/* Set up and sort exception table */
- mod->extable = section_objs(info.hdr, info.sechdrs, info.secstrings, "__ex_table",
+ mod->extable = section_objs(&info, "__ex_table",
sizeof(*mod->extable), &mod->num_exentries);
sort_extable(mod->extable, mod->extable + mod->num_exentries);
@@ -2643,7 +2585,7 @@ static noinline struct module *load_module(void __user *umod,
add_kallsyms(mod, &info);
if (!mod->taints)
- debug = section_objs(info.hdr, info.sechdrs, info.secstrings, "__verbose",
+ debug = section_objs(&info, "__verbose",
sizeof(*debug), &num_debug);
err = module_finalize(info.hdr, info.sechdrs, mod);