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-rw-r--r--tools/arch/x86/include/asm/orc_types.h4
-rw-r--r--tools/include/linux/objtool.h11
-rw-r--r--tools/objtool/.gitignore1
-rw-r--r--tools/objtool/Build2
-rw-r--r--tools/objtool/Documentation/objtool.txt8
-rw-r--r--tools/objtool/Makefile66
-rw-r--r--tools/objtool/builtin-check.c2
-rw-r--r--tools/objtool/check.c9
-rw-r--r--tools/objtool/elf.c42
-rw-r--r--tools/objtool/include/objtool/builtin.h2
-rw-r--r--tools/objtool/include/objtool/elf.h9
-rw-r--r--tools/objtool/include/objtool/special.h2
-rw-r--r--tools/objtool/orc_dump.c4
-rw-r--r--tools/objtool/special.c6
14 files changed, 107 insertions, 61 deletions
diff --git a/tools/arch/x86/include/asm/orc_types.h b/tools/arch/x86/include/asm/orc_types.h
index 5a2baf28a1dc..1343a62106de 100644
--- a/tools/arch/x86/include/asm/orc_types.h
+++ b/tools/arch/x86/include/asm/orc_types.h
@@ -57,12 +57,14 @@ struct orc_entry {
unsigned sp_reg:4;
unsigned bp_reg:4;
unsigned type:2;
+ unsigned signal:1;
unsigned end:1;
#elif defined(__BIG_ENDIAN_BITFIELD)
unsigned bp_reg:4;
unsigned sp_reg:4;
- unsigned unused:5;
+ unsigned unused:4;
unsigned end:1;
+ unsigned signal:1;
unsigned type:2;
#endif
} __packed;
diff --git a/tools/include/linux/objtool.h b/tools/include/linux/objtool.h
index 62c54ffbeeaa..9ac3df3fccf0 100644
--- a/tools/include/linux/objtool.h
+++ b/tools/include/linux/objtool.h
@@ -15,6 +15,7 @@ struct unwind_hint {
s16 sp_offset;
u8 sp_reg;
u8 type;
+ u8 signal;
u8 end;
};
#endif
@@ -49,7 +50,7 @@ struct unwind_hint {
#ifndef __ASSEMBLY__
-#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
+#define UNWIND_HINT(sp_reg, sp_offset, type, signal, end) \
"987: \n\t" \
".pushsection .discard.unwind_hints\n\t" \
/* struct unwind_hint */ \
@@ -57,6 +58,7 @@ struct unwind_hint {
".short " __stringify(sp_offset) "\n\t" \
".byte " __stringify(sp_reg) "\n\t" \
".byte " __stringify(type) "\n\t" \
+ ".byte " __stringify(signal) "\n\t" \
".byte " __stringify(end) "\n\t" \
".balign 4 \n\t" \
".popsection\n\t"
@@ -129,7 +131,7 @@ struct unwind_hint {
* the debuginfo as necessary. It will also warn if it sees any
* inconsistencies.
*/
-.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 end=0
+.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 signal=0 end=0
.Lunwind_hint_ip_\@:
.pushsection .discard.unwind_hints
/* struct unwind_hint */
@@ -137,6 +139,7 @@ struct unwind_hint {
.short \sp_offset
.byte \sp_reg
.byte \type
+ .byte \signal
.byte \end
.balign 4
.popsection
@@ -174,7 +177,7 @@ struct unwind_hint {
#ifndef __ASSEMBLY__
-#define UNWIND_HINT(sp_reg, sp_offset, type, end) \
+#define UNWIND_HINT(sp_reg, sp_offset, type, signal, end) \
"\n\t"
#define STACK_FRAME_NON_STANDARD(func)
#define STACK_FRAME_NON_STANDARD_FP(func)
@@ -182,7 +185,7 @@ struct unwind_hint {
#define ASM_REACHABLE
#else
#define ANNOTATE_INTRA_FUNCTION_CALL
-.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 end=0
+.macro UNWIND_HINT type:req sp_reg=0 sp_offset=0 signal=0 end=0
.endm
.macro STACK_FRAME_NON_STANDARD func:req
.endm
diff --git a/tools/objtool/.gitignore b/tools/objtool/.gitignore
index 14236db3677f..4faa4dd72f35 100644
--- a/tools/objtool/.gitignore
+++ b/tools/objtool/.gitignore
@@ -2,3 +2,4 @@
arch/x86/lib/inat-tables.c
/objtool
fixdep
+libsubcmd/
diff --git a/tools/objtool/Build b/tools/objtool/Build
index 33f2ee5a46d3..a3cdf8af6635 100644
--- a/tools/objtool/Build
+++ b/tools/objtool/Build
@@ -16,8 +16,6 @@ objtool-y += libctype.o
objtool-y += str_error_r.o
objtool-y += librbtree.o
-CFLAGS += -I$(srctree)/tools/lib
-
$(OUTPUT)libstring.o: ../lib/string.c FORCE
$(call rule_mkdir)
$(call if_changed_dep,cc_o_c)
diff --git a/tools/objtool/Documentation/objtool.txt b/tools/objtool/Documentation/objtool.txt
index 8a671902a187..8e53fc6735ef 100644
--- a/tools/objtool/Documentation/objtool.txt
+++ b/tools/objtool/Documentation/objtool.txt
@@ -410,6 +410,14 @@ the objtool maintainers.
can remove this warning by putting the ANNOTATE_INTRA_FUNCTION_CALL
directive right before the call.
+12. file.o: warning: func(): not an indirect call target
+
+ This means that objtool is running with --ibt and a function expected
+ to be an indirect call target is not. In particular, this happens for
+ init_module() or cleanup_module() if a module relies on these special
+ names and does not use module_init() / module_exit() macros to create
+ them.
+
If the error doesn't seem to make sense, it could be a bug in objtool.
Feel free to ask the objtool maintainer for help.
diff --git a/tools/objtool/Makefile b/tools/objtool/Makefile
index a3a9cc24e0e3..83b100c1e7f6 100644
--- a/tools/objtool/Makefile
+++ b/tools/objtool/Makefile
@@ -2,19 +2,18 @@
include ../scripts/Makefile.include
include ../scripts/Makefile.arch
-# always use the host compiler
-AR = $(HOSTAR)
-CC = $(HOSTCC)
-LD = $(HOSTLD)
-
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
endif
-SUBCMD_SRCDIR = $(srctree)/tools/lib/subcmd/
-LIBSUBCMD_OUTPUT = $(or $(OUTPUT),$(CURDIR)/)
-LIBSUBCMD = $(LIBSUBCMD_OUTPUT)libsubcmd.a
+LIBSUBCMD_DIR = $(srctree)/tools/lib/subcmd/
+ifneq ($(OUTPUT),)
+ LIBSUBCMD_OUTPUT = $(abspath $(OUTPUT))/libsubcmd
+else
+ LIBSUBCMD_OUTPUT = $(CURDIR)/libsubcmd
+endif
+LIBSUBCMD = $(LIBSUBCMD_OUTPUT)/libsubcmd.a
OBJTOOL := $(OUTPUT)objtool
OBJTOOL_IN := $(OBJTOOL)-in.o
@@ -28,16 +27,29 @@ INCLUDES := -I$(srctree)/tools/include \
-I$(srctree)/tools/arch/$(HOSTARCH)/include/uapi \
-I$(srctree)/tools/arch/$(SRCARCH)/include \
-I$(srctree)/tools/objtool/include \
- -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include
+ -I$(srctree)/tools/objtool/arch/$(SRCARCH)/include \
+ -I$(LIBSUBCMD_OUTPUT)/include
+# Note, EXTRA_WARNINGS here was determined for CC and not HOSTCC, it
+# is passed here to match a legacy behavior.
WARNINGS := $(EXTRA_WARNINGS) -Wno-switch-default -Wno-switch-enum -Wno-packed -Wno-nested-externs
-CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
-LDFLAGS += $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
+OBJTOOL_CFLAGS := -Werror $(WARNINGS) $(KBUILD_HOSTCFLAGS) -g $(INCLUDES) $(LIBELF_FLAGS)
+OBJTOOL_LDFLAGS := $(LIBELF_LIBS) $(LIBSUBCMD) $(KBUILD_HOSTLDFLAGS)
# Allow old libelf to be used:
-elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(CC) $(CFLAGS) -x c -E - | grep elf_getshdr)
-CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
+elfshdr := $(shell echo '$(pound)include <libelf.h>' | $(HOSTCC) $(OBJTOOL_CFLAGS) -x c -E - | grep elf_getshdr)
+OBJTOOL_CFLAGS += $(if $(elfshdr),,-DLIBELF_USE_DEPRECATED)
+
+# Always want host compilation.
+HOST_OVERRIDES := CC="$(HOSTCC)" LD="$(HOSTLD)" AR="$(HOSTAR)"
AWK = awk
+MKDIR = mkdir
+
+ifeq ($(V),1)
+ Q =
+else
+ Q = @
+endif
BUILD_ORC := n
@@ -49,21 +61,33 @@ export BUILD_ORC
export srctree OUTPUT CFLAGS SRCARCH AWK
include $(srctree)/tools/build/Makefile.include
-$(OBJTOOL_IN): fixdep FORCE
- @$(CONFIG_SHELL) ./sync-check.sh
- @$(MAKE) $(build)=objtool
+$(OBJTOOL_IN): fixdep $(LIBSUBCMD) FORCE
+ $(Q)$(CONFIG_SHELL) ./sync-check.sh
+ $(Q)$(MAKE) $(build)=objtool $(HOST_OVERRIDES) CFLAGS="$(OBJTOOL_CFLAGS)" \
+ LDFLAGS="$(OBJTOOL_LDFLAGS)"
+
$(OBJTOOL): $(LIBSUBCMD) $(OBJTOOL_IN)
- $(QUIET_LINK)$(CC) $(OBJTOOL_IN) $(LDFLAGS) -o $@
+ $(QUIET_LINK)$(HOSTCC) $(OBJTOOL_IN) $(OBJTOOL_LDFLAGS) -o $@
+
+
+$(LIBSUBCMD_OUTPUT):
+ $(Q)$(MKDIR) -p $@
+$(LIBSUBCMD): fixdep $(LIBSUBCMD_OUTPUT) FORCE
+ $(Q)$(MAKE) -C $(LIBSUBCMD_DIR) O=$(LIBSUBCMD_OUTPUT) \
+ DESTDIR=$(LIBSUBCMD_OUTPUT) prefix= subdir= \
+ $(HOST_OVERRIDES) EXTRA_CFLAGS="$(OBJTOOL_CFLAGS)" \
+ $@ install_headers
-$(LIBSUBCMD): fixdep FORCE
- $(Q)$(MAKE) -C $(SUBCMD_SRCDIR) OUTPUT=$(LIBSUBCMD_OUTPUT)
+$(LIBSUBCMD)-clean:
+ $(call QUIET_CLEAN, libsubcmd)
+ $(Q)$(RM) -r -- $(LIBSUBCMD_OUTPUT)
-clean:
+clean: $(LIBSUBCMD)-clean
$(call QUIET_CLEAN, objtool) $(RM) $(OBJTOOL)
$(Q)find $(OUTPUT) -name '*.o' -delete -o -name '\.*.cmd' -delete -o -name '\.*.d' -delete
- $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep $(LIBSUBCMD)
+ $(Q)$(RM) $(OUTPUT)arch/x86/lib/inat-tables.c $(OUTPUT)fixdep
FORCE:
diff --git a/tools/objtool/builtin-check.c b/tools/objtool/builtin-check.c
index a4f39407bf59..7c175198d09f 100644
--- a/tools/objtool/builtin-check.c
+++ b/tools/objtool/builtin-check.c
@@ -65,7 +65,7 @@ static int parse_hacks(const struct option *opt, const char *str, int unset)
return found ? 0 : -1;
}
-const struct option check_options[] = {
+static const struct option check_options[] = {
OPT_GROUP("Actions:"),
OPT_CALLBACK_OPTARG('h', "hacks", NULL, NULL, "jump_label,noinstr,skylake", "patch toolchain bugs/limitations", parse_hacks),
OPT_BOOLEAN('i', "ibt", &opts.ibt, "validate and annotate IBT"),
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 94b518c12f9a..ba07a8ebaf73 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -690,6 +690,7 @@ static int create_static_call_sections(struct objtool_file *file)
if (strncmp(key_name, STATIC_CALL_TRAMP_PREFIX_STR,
STATIC_CALL_TRAMP_PREFIX_LEN)) {
WARN("static_call: trampoline name malformed: %s", key_name);
+ free(key_name);
return -1;
}
tmp = key_name + STATIC_CALL_TRAMP_PREFIX_LEN - STATIC_CALL_KEY_PREFIX_LEN;
@@ -699,6 +700,7 @@ static int create_static_call_sections(struct objtool_file *file)
if (!key_sym) {
if (!opts.module) {
WARN("static_call: can't find static_call_key symbol: %s", tmp);
+ free(key_name);
return -1;
}
@@ -856,8 +858,15 @@ static int create_ibt_endbr_seal_sections(struct objtool_file *file)
list_for_each_entry(insn, &file->endbr_list, call_node) {
int *site = (int *)sec->data->d_buf + idx;
+ struct symbol *sym = insn->sym;
*site = 0;
+ if (opts.module && sym && sym->type == STT_FUNC &&
+ insn->offset == sym->offset &&
+ (!strcmp(sym->name, "init_module") ||
+ !strcmp(sym->name, "cleanup_module")))
+ WARN("%s(): not an indirect call target", sym->name);
+
if (elf_add_reloc_to_insn(file->elf, sec,
idx * sizeof(int),
R_X86_64_PC32,
diff --git a/tools/objtool/elf.c b/tools/objtool/elf.c
index 64443a7f4bbf..6806ce01d933 100644
--- a/tools/objtool/elf.c
+++ b/tools/objtool/elf.c
@@ -284,13 +284,13 @@ static int read_sections(struct elf *elf)
!elf_alloc_hash(section_name, sections_nr))
return -1;
+ elf->section_data = calloc(sections_nr, sizeof(*sec));
+ if (!elf->section_data) {
+ perror("calloc");
+ return -1;
+ }
for (i = 0; i < sections_nr; i++) {
- sec = malloc(sizeof(*sec));
- if (!sec) {
- perror("malloc");
- return -1;
- }
- memset(sec, 0, sizeof(*sec));
+ sec = &elf->section_data[i];
INIT_LIST_HEAD(&sec->symbol_list);
INIT_LIST_HEAD(&sec->reloc_list);
@@ -422,13 +422,13 @@ static int read_symbols(struct elf *elf)
!elf_alloc_hash(symbol_name, symbols_nr))
return -1;
+ elf->symbol_data = calloc(symbols_nr, sizeof(*sym));
+ if (!elf->symbol_data) {
+ perror("calloc");
+ return -1;
+ }
for (i = 0; i < symbols_nr; i++) {
- sym = malloc(sizeof(*sym));
- if (!sym) {
- perror("malloc");
- return -1;
- }
- memset(sym, 0, sizeof(*sym));
+ sym = &elf->symbol_data[i];
sym->idx = i;
@@ -918,13 +918,13 @@ static int read_relocs(struct elf *elf)
sec->base->reloc = sec;
nr_reloc = 0;
+ sec->reloc_data = calloc(sec->sh.sh_size / sec->sh.sh_entsize, sizeof(*reloc));
+ if (!sec->reloc_data) {
+ perror("calloc");
+ return -1;
+ }
for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) {
- reloc = malloc(sizeof(*reloc));
- if (!reloc) {
- perror("malloc");
- return -1;
- }
- memset(reloc, 0, sizeof(*reloc));
+ reloc = &sec->reloc_data[i];
switch (sec->sh.sh_type) {
case SHT_REL:
if (read_rel_reloc(sec, i, reloc, &symndx))
@@ -1453,16 +1453,16 @@ void elf_close(struct elf *elf)
list_for_each_entry_safe(sym, tmpsym, &sec->symbol_list, list) {
list_del(&sym->list);
hash_del(&sym->hash);
- free(sym);
}
list_for_each_entry_safe(reloc, tmpreloc, &sec->reloc_list, list) {
list_del(&reloc->list);
hash_del(&reloc->hash);
- free(reloc);
}
list_del(&sec->list);
- free(sec);
+ free(sec->reloc_data);
}
+ free(elf->symbol_data);
+ free(elf->section_data);
free(elf);
}
diff --git a/tools/objtool/include/objtool/builtin.h b/tools/objtool/include/objtool/builtin.h
index fa45044e3863..2a108e648b7a 100644
--- a/tools/objtool/include/objtool/builtin.h
+++ b/tools/objtool/include/objtool/builtin.h
@@ -7,8 +7,6 @@
#include <subcmd/parse-options.h>
-extern const struct option check_options[];
-
struct opts {
/* actions: */
bool dump_orc;
diff --git a/tools/objtool/include/objtool/elf.h b/tools/objtool/include/objtool/elf.h
index bb60fd42b46f..ad0024da262b 100644
--- a/tools/objtool/include/objtool/elf.h
+++ b/tools/objtool/include/objtool/elf.h
@@ -39,6 +39,7 @@ struct section {
char *name;
int idx;
bool changed, text, rodata, noinstr, init, truncate;
+ struct reloc *reloc_data;
};
struct symbol {
@@ -49,12 +50,11 @@ struct symbol {
GElf_Sym sym;
struct section *sec;
char *name;
- unsigned int idx;
- unsigned char bind, type;
+ unsigned int idx, len;
unsigned long offset;
- unsigned int len;
unsigned long __subtree_last;
struct symbol *pfunc, *cfunc, *alias;
+ unsigned char bind, type;
u8 uaccess_safe : 1;
u8 static_call_tramp : 1;
u8 retpoline_thunk : 1;
@@ -104,6 +104,9 @@ struct elf {
struct hlist_head *section_hash;
struct hlist_head *section_name_hash;
struct hlist_head *reloc_hash;
+
+ struct section *section_data;
+ struct symbol *symbol_data;
};
#define OFFSET_STRIDE_BITS 4
diff --git a/tools/objtool/include/objtool/special.h b/tools/objtool/include/objtool/special.h
index dc4721e19002..86d4af9c5aa9 100644
--- a/tools/objtool/include/objtool/special.h
+++ b/tools/objtool/include/objtool/special.h
@@ -19,6 +19,7 @@ struct special_alt {
bool skip_orig;
bool skip_alt;
bool jump_or_nop;
+ u8 key_addend;
struct section *orig_sec;
unsigned long orig_off;
@@ -27,7 +28,6 @@ struct special_alt {
unsigned long new_off;
unsigned int orig_len, new_len; /* group only */
- u8 key_addend;
};
int special_get_alts(struct elf *elf, struct list_head *alts);
diff --git a/tools/objtool/orc_dump.c b/tools/objtool/orc_dump.c
index 4f1211fec82c..2d8ebdcd1db3 100644
--- a/tools/objtool/orc_dump.c
+++ b/tools/objtool/orc_dump.c
@@ -211,8 +211,8 @@ int orc_dump(const char *_objname)
print_reg(orc[i].bp_reg, bswap_if_needed(&dummy_elf, orc[i].bp_offset));
- printf(" type:%s end:%d\n",
- orc_type_name(orc[i].type), orc[i].end);
+ printf(" type:%s signal:%d end:%d\n",
+ orc_type_name(orc[i].type), orc[i].signal, orc[i].end);
}
elf_end(elf);
diff --git a/tools/objtool/special.c b/tools/objtool/special.c
index 9c8d827f69af..baa85c31526b 100644
--- a/tools/objtool/special.c
+++ b/tools/objtool/special.c
@@ -26,7 +26,7 @@ struct special_entry {
unsigned char key; /* jump_label key */
};
-struct special_entry entries[] = {
+static const struct special_entry entries[] = {
{
.sec = ".altinstructions",
.group = true,
@@ -65,7 +65,7 @@ static void reloc_to_sec_off(struct reloc *reloc, struct section **sec,
*off = reloc->sym->offset + reloc->addend;
}
-static int get_alt_entry(struct elf *elf, struct special_entry *entry,
+static int get_alt_entry(struct elf *elf, const struct special_entry *entry,
struct section *sec, int idx,
struct special_alt *alt)
{
@@ -139,7 +139,7 @@ static int get_alt_entry(struct elf *elf, struct special_entry *entry,
*/
int special_get_alts(struct elf *elf, struct list_head *alts)
{
- struct special_entry *entry;
+ const struct special_entry *entry;
struct section *sec;
unsigned int nr_entries;
struct special_alt *alt;
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-06 10:11:49 +0300