summaryrefslogtreecommitdiff
path: root/scripts/mod
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/file2alias.c36
-rw-r--r--scripts/mod/modpost.c41
-rw-r--r--scripts/mod/modpost.h17
3 files changed, 54 insertions, 40 deletions
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 5b5745f00eb3..19ec72a69e90 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -132,7 +132,8 @@ struct devtable {
* based at address m.
*/
#define DEF_FIELD(m, devid, f) \
- typeof(((struct devid *)0)->f) f = TO_NATIVE(*(typeof(f) *)((m) + OFF_##devid##_##f))
+ typeof(((struct devid *)0)->f) f = \
+ get_unaligned_native((typeof(f) *)((m) + OFF_##devid##_##f))
/* Define a variable f that holds the address of field f of struct devid
* based at address m. Due to the way typeof works, for a field of type
@@ -600,7 +601,7 @@ static void do_pnp_card_entry(struct module *mod, void *symval)
static void do_pcmcia_entry(struct module *mod, void *symval)
{
char alias[256] = {};
- unsigned int i;
+
DEF_FIELD(symval, pcmcia_device_id, match_flags);
DEF_FIELD(symval, pcmcia_device_id, manf_id);
DEF_FIELD(symval, pcmcia_device_id, card_id);
@@ -609,10 +610,6 @@ static void do_pcmcia_entry(struct module *mod, void *symval)
DEF_FIELD(symval, pcmcia_device_id, device_no);
DEF_FIELD_ADDR(symval, pcmcia_device_id, prod_id_hash);
- for (i=0; i<4; i++) {
- (*prod_id_hash)[i] = TO_NATIVE((*prod_id_hash)[i]);
- }
-
ADD(alias, "m", match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID,
manf_id);
ADD(alias, "c", match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID,
@@ -623,10 +620,14 @@ static void do_pcmcia_entry(struct module *mod, void *symval)
function);
ADD(alias, "pfn", match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO,
device_no);
- ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1, (*prod_id_hash)[0]);
- ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2, (*prod_id_hash)[1]);
- ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3, (*prod_id_hash)[2]);
- ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4, (*prod_id_hash)[3]);
+ ADD(alias, "pa", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1,
+ get_unaligned_native(*prod_id_hash + 0));
+ ADD(alias, "pb", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2,
+ get_unaligned_native(*prod_id_hash + 1));
+ ADD(alias, "pc", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3,
+ get_unaligned_native(*prod_id_hash + 2));
+ ADD(alias, "pd", match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4,
+ get_unaligned_native(*prod_id_hash + 3));
module_alias_printf(mod, true, "pcmcia:%s", alias);
}
@@ -654,10 +655,9 @@ static void do_input(char *alias,
{
unsigned int i;
- for (i = min / BITS_PER_LONG; i < max / BITS_PER_LONG + 1; i++)
- arr[i] = TO_NATIVE(arr[i]);
- for (i = min; i < max; i++)
- if (arr[i / BITS_PER_LONG] & (1ULL << (i%BITS_PER_LONG)))
+ for (i = min; i <= max; i++)
+ if (get_unaligned_native(arr + i / BITS_PER_LONG) &
+ (1ULL << (i % BITS_PER_LONG)))
sprintf(alias + strlen(alias), "%X,*", i);
}
@@ -812,15 +812,13 @@ static void do_virtio_entry(struct module *mod, void *symval)
* Each byte of the guid will be represented by two hex characters
* in the name.
*/
-
static void do_vmbus_entry(struct module *mod, void *symval)
{
- int i;
DEF_FIELD_ADDR(symval, hv_vmbus_device_id, guid);
- char guid_name[(sizeof(*guid) + 1) * 2];
+ char guid_name[sizeof(*guid) * 2 + 1];
- for (i = 0; i < (sizeof(*guid) * 2); i += 2)
- sprintf(&guid_name[i], "%02x", TO_NATIVE((guid->b)[i/2]));
+ for (int i = 0; i < sizeof(*guid); i++)
+ sprintf(&guid_name[i * 2], "%02x", guid->b[i]);
module_alias_printf(mod, false, "vmbus:%s", guid_name);
}
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index fb787a5715f5..7ea59dc4926b 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -155,12 +155,13 @@ char *get_line(char **stringp)
/* A list of all modules we processed */
LIST_HEAD(modules);
-static struct module *find_module(const char *modname)
+static struct module *find_module(const char *filename, const char *modname)
{
struct module *mod;
list_for_each_entry(mod, &modules, list) {
- if (strcmp(mod->name, modname) == 0)
+ if (!strcmp(mod->dump_file, filename) &&
+ !strcmp(mod->name, modname))
return mod;
}
return NULL;
@@ -1137,9 +1138,9 @@ static Elf_Addr addend_386_rel(uint32_t *location, unsigned int r_type)
{
switch (r_type) {
case R_386_32:
- return TO_NATIVE(*location);
+ return get_unaligned_native(location);
case R_386_PC32:
- return TO_NATIVE(*location) + 4;
+ return get_unaligned_native(location) + 4;
}
return (Elf_Addr)(-1);
@@ -1160,24 +1161,24 @@ static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, unsigned int r_type)
switch (r_type) {
case R_ARM_ABS32:
case R_ARM_REL32:
- inst = TO_NATIVE(*(uint32_t *)loc);
+ inst = get_unaligned_native((uint32_t *)loc);
return inst + sym->st_value;
case R_ARM_MOVW_ABS_NC:
case R_ARM_MOVT_ABS:
- inst = TO_NATIVE(*(uint32_t *)loc);
+ inst = get_unaligned_native((uint32_t *)loc);
offset = sign_extend32(((inst & 0xf0000) >> 4) | (inst & 0xfff),
15);
return offset + sym->st_value;
case R_ARM_PC24:
case R_ARM_CALL:
case R_ARM_JUMP24:
- inst = TO_NATIVE(*(uint32_t *)loc);
+ inst = get_unaligned_native((uint32_t *)loc);
offset = sign_extend32((inst & 0x00ffffff) << 2, 25);
return offset + sym->st_value + 8;
case R_ARM_THM_MOVW_ABS_NC:
case R_ARM_THM_MOVT_ABS:
- upper = TO_NATIVE(*(uint16_t *)loc);
- lower = TO_NATIVE(*((uint16_t *)loc + 1));
+ upper = get_unaligned_native((uint16_t *)loc);
+ lower = get_unaligned_native((uint16_t *)loc + 1);
offset = sign_extend32(((upper & 0x000f) << 12) |
((upper & 0x0400) << 1) |
((lower & 0x7000) >> 4) |
@@ -1194,8 +1195,8 @@ static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, unsigned int r_type)
* imm11 = lower[10:0]
* imm32 = SignExtend(S:J2:J1:imm6:imm11:'0')
*/
- upper = TO_NATIVE(*(uint16_t *)loc);
- lower = TO_NATIVE(*((uint16_t *)loc + 1));
+ upper = get_unaligned_native((uint16_t *)loc);
+ lower = get_unaligned_native((uint16_t *)loc + 1);
sign = (upper >> 10) & 1;
j1 = (lower >> 13) & 1;
@@ -1218,8 +1219,8 @@ static Elf_Addr addend_arm_rel(void *loc, Elf_Sym *sym, unsigned int r_type)
* I2 = NOT(J2 XOR S)
* imm32 = SignExtend(S:I1:I2:imm10:imm11:'0')
*/
- upper = TO_NATIVE(*(uint16_t *)loc);
- lower = TO_NATIVE(*((uint16_t *)loc + 1));
+ upper = get_unaligned_native((uint16_t *)loc);
+ lower = get_unaligned_native((uint16_t *)loc + 1);
sign = (upper >> 10) & 1;
j1 = (lower >> 13) & 1;
@@ -1240,7 +1241,7 @@ static Elf_Addr addend_mips_rel(uint32_t *location, unsigned int r_type)
{
uint32_t inst;
- inst = TO_NATIVE(*location);
+ inst = get_unaligned_native(location);
switch (r_type) {
case R_MIPS_LO16:
return inst & 0xffff;
@@ -2030,10 +2031,10 @@ static void read_dump(const char *fname)
continue;
}
- mod = find_module(modname);
+ mod = find_module(fname, modname);
if (!mod) {
mod = new_module(modname, strlen(modname));
- mod->from_dump = true;
+ mod->dump_file = fname;
}
s = sym_add_exported(symname, mod, gpl_only, namespace);
sym_set_crc(s, crc);
@@ -2052,7 +2053,7 @@ static void write_dump(const char *fname)
struct symbol *sym;
list_for_each_entry(mod, &modules, list) {
- if (mod->from_dump)
+ if (mod->dump_file)
continue;
list_for_each_entry(sym, &mod->exported_symbols, list) {
if (trim_unused_exports && !sym->used)
@@ -2076,7 +2077,7 @@ static void write_namespace_deps_files(const char *fname)
list_for_each_entry(mod, &modules, list) {
- if (mod->from_dump || list_empty(&mod->missing_namespaces))
+ if (mod->dump_file || list_empty(&mod->missing_namespaces))
continue;
buf_printf(&ns_deps_buf, "%s.ko:", mod->name);
@@ -2194,7 +2195,7 @@ int main(int argc, char **argv)
read_symbols_from_files(files_source);
list_for_each_entry(mod, &modules, list) {
- if (mod->from_dump || mod->is_vmlinux)
+ if (mod->dump_file || mod->is_vmlinux)
continue;
check_modname_len(mod);
@@ -2205,7 +2206,7 @@ int main(int argc, char **argv)
handle_white_list_exports(unused_exports_white_list);
list_for_each_entry(mod, &modules, list) {
- if (mod->from_dump)
+ if (mod->dump_file)
continue;
if (mod->is_vmlinux)
diff --git a/scripts/mod/modpost.h b/scripts/mod/modpost.h
index 49848fcbe2a1..ffd0a52a606e 100644
--- a/scripts/mod/modpost.h
+++ b/scripts/mod/modpost.h
@@ -65,6 +65,20 @@
#define TO_NATIVE(x) \
(target_is_big_endian == host_is_big_endian ? x : bswap(x))
+#define __get_unaligned_t(type, ptr) ({ \
+ const struct { type x; } __attribute__((__packed__)) *__pptr = \
+ (typeof(__pptr))(ptr); \
+ __pptr->x; \
+})
+
+#define get_unaligned(ptr) __get_unaligned_t(typeof(*(ptr)), (ptr))
+
+#define get_unaligned_native(ptr) \
+({ \
+ typeof(*(ptr)) _val = get_unaligned(ptr); \
+ TO_NATIVE(_val); \
+})
+
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define strstarts(str, prefix) (strncmp(str, prefix, strlen(prefix)) == 0)
@@ -95,14 +109,15 @@ struct module_alias {
/**
* struct module - represent a module (vmlinux or *.ko)
*
+ * @dump_file: path to the .symvers file if loaded from a file
* @aliases: list head for module_aliases
*/
struct module {
struct list_head list;
struct list_head exported_symbols;
struct list_head unresolved_symbols;
+ const char *dump_file;
bool is_gpl_compatible;
- bool from_dump; /* true if module was loaded from *.symvers */
bool is_vmlinux;
bool seen;
bool has_init;
generated by cgit (git 2.34.1) at 2025-05-30 12:57:19 +0000