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objtool: Rename rela to reloc
Before supporting additional relocation types rename the relevant
types and functions from "rela" to "reloc". This work be done with
the following regex:
sed -e 's/struct rela/struct reloc/g' \
-e 's/\([_\*]\)rela\(s\{0,1\}\)/\1reloc\2/g' \
-e 's/tmprela\(s\{0,1\}\)/tmpreloc\1/g' \
-e 's/relasec/relocsec/g' \
-e 's/rela_list/reloc_list/g' \
-e 's/rela_hash/reloc_hash/g' \
-e 's/add_rela/add_reloc/g' \
-e 's/rela->/reloc->/g' \
-e '/rela[,\.]/{ s/\([^\.>]\)rela\([\.,]\)/\1reloc\2/g ; }' \
-e 's/rela =/reloc =/g' \
-e 's/relas =/relocs =/g' \
-e 's/relas\[/relocs[/g' \
-e 's/relaname =/relocname =/g' \
-e 's/= rela\;/= reloc\;/g' \
-e 's/= relas\;/= relocs\;/g' \
-e 's/= relaname\;/= relocname\;/g' \
-e 's/, rela)/, reloc)/g' \
-e 's/\([ @]\)rela\([ "]\)/\1reloc\2/g' \
-e 's/ rela$/ reloc/g' \
-e 's/, relaname/, relocname/g' \
-e 's/sec->rela/sec->reloc/g' \
-e 's/(\(!\{0,1\}\)rela/(\1reloc/g' \
-i \
arch.h \
arch/x86/decode.c \
check.c \
check.h \
elf.c \
elf.h \
orc_gen.c \
special.c
Notable exceptions which complicate the regex include gelf_*
library calls and standard/expected section names which still use
"rela" because they encode the type of relocation expected. Also, keep
"rela" in the struct because it encodes a specific type of relocation
we currently expect.
It will eventually turn into a member of an anonymous union when a
susequent patch adds implicit addend, or "rel", relocation support.
Signed-off-by: Matt Helsley <mhelsley@vmware.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
This commit is contained in:
Matt Helsley
Josh Poimboeuf
parent
1e968bf5ca
commit
f197422263
@ -82,6 +82,6 @@ bool arch_callee_saved_reg(unsigned char reg);
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unsigned long arch_jump_destination(struct instruction *insn);
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unsigned long arch_dest_rela_offset(int addend);
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unsigned long arch_dest_reloc_offset(int addend);
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#endif /* _ARCH_H */
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@ -67,7 +67,7 @@ bool arch_callee_saved_reg(unsigned char reg)
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}
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}
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unsigned long arch_dest_rela_offset(int addend)
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unsigned long arch_dest_reloc_offset(int addend)
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{
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return addend + 4;
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}
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@ -352,7 +352,7 @@ static struct instruction *find_last_insn(struct objtool_file *file,
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static int add_dead_ends(struct objtool_file *file)
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{
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struct section *sec;
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struct rela *rela;
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struct reloc *reloc;
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struct instruction *insn;
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/*
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@ -370,24 +370,24 @@ static int add_dead_ends(struct objtool_file *file)
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if (!sec)
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goto reachable;
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list_for_each_entry(rela, &sec->rela_list, list) {
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if (rela->sym->type != STT_SECTION) {
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list_for_each_entry(reloc, &sec->reloc_list, list) {
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if (reloc->sym->type != STT_SECTION) {
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WARN("unexpected relocation symbol type in %s", sec->name);
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return -1;
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}
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insn = find_insn(file, rela->sym->sec, rela->addend);
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insn = find_insn(file, reloc->sym->sec, reloc->addend);
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if (insn)
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insn = list_prev_entry(insn, list);
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else if (rela->addend == rela->sym->sec->len) {
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insn = find_last_insn(file, rela->sym->sec);
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else if (reloc->addend == reloc->sym->sec->len) {
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insn = find_last_insn(file, reloc->sym->sec);
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if (!insn) {
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WARN("can't find unreachable insn at %s+0x%x",
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rela->sym->sec->name, rela->addend);
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reloc->sym->sec->name, reloc->addend);
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return -1;
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}
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} else {
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WARN("can't find unreachable insn at %s+0x%x",
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rela->sym->sec->name, rela->addend);
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reloc->sym->sec->name, reloc->addend);
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return -1;
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}
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@ -405,24 +405,24 @@ reachable:
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if (!sec)
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return 0;
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list_for_each_entry(rela, &sec->rela_list, list) {
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if (rela->sym->type != STT_SECTION) {
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list_for_each_entry(reloc, &sec->reloc_list, list) {
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if (reloc->sym->type != STT_SECTION) {
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WARN("unexpected relocation symbol type in %s", sec->name);
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return -1;
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}
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insn = find_insn(file, rela->sym->sec, rela->addend);
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insn = find_insn(file, reloc->sym->sec, reloc->addend);
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if (insn)
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insn = list_prev_entry(insn, list);
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else if (rela->addend == rela->sym->sec->len) {
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insn = find_last_insn(file, rela->sym->sec);
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else if (reloc->addend == reloc->sym->sec->len) {
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insn = find_last_insn(file, reloc->sym->sec);
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if (!insn) {
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WARN("can't find reachable insn at %s+0x%x",
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rela->sym->sec->name, rela->addend);
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reloc->sym->sec->name, reloc->addend);
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return -1;
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}
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} else {
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WARN("can't find reachable insn at %s+0x%x",
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rela->sym->sec->name, rela->addend);
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reloc->sym->sec->name, reloc->addend);
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return -1;
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}
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@ -440,26 +440,26 @@ static void add_ignores(struct objtool_file *file)
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struct instruction *insn;
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struct section *sec;
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struct symbol *func;
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struct rela *rela;
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struct reloc *reloc;
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sec = find_section_by_name(file->elf, ".rela.discard.func_stack_frame_non_standard");
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if (!sec)
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return;
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list_for_each_entry(rela, &sec->rela_list, list) {
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switch (rela->sym->type) {
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list_for_each_entry(reloc, &sec->reloc_list, list) {
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switch (reloc->sym->type) {
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case STT_FUNC:
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func = rela->sym;
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func = reloc->sym;
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break;
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case STT_SECTION:
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func = find_func_by_offset(rela->sym->sec, rela->addend);
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func = find_func_by_offset(reloc->sym->sec, reloc->addend);
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if (!func)
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continue;
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break;
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default:
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WARN("unexpected relocation symbol type in %s: %d", sec->name, rela->sym->type);
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WARN("unexpected relocation symbol type in %s: %d", sec->name, reloc->sym->type);
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continue;
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}
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@ -557,20 +557,20 @@ static void add_uaccess_safe(struct objtool_file *file)
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static int add_ignore_alternatives(struct objtool_file *file)
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{
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struct section *sec;
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struct rela *rela;
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struct reloc *reloc;
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struct instruction *insn;
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sec = find_section_by_name(file->elf, ".rela.discard.ignore_alts");
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if (!sec)
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return 0;
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list_for_each_entry(rela, &sec->rela_list, list) {
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if (rela->sym->type != STT_SECTION) {
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list_for_each_entry(reloc, &sec->reloc_list, list) {
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if (reloc->sym->type != STT_SECTION) {
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WARN("unexpected relocation symbol type in %s", sec->name);
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return -1;
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}
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insn = find_insn(file, rela->sym->sec, rela->addend);
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insn = find_insn(file, reloc->sym->sec, reloc->addend);
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if (!insn) {
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WARN("bad .discard.ignore_alts entry");
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return -1;
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@ -588,7 +588,7 @@ static int add_ignore_alternatives(struct objtool_file *file)
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static int add_jump_destinations(struct objtool_file *file)
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{
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struct instruction *insn;
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struct rela *rela;
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struct reloc *reloc;
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struct section *dest_sec;
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unsigned long dest_off;
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@ -599,19 +599,19 @@ static int add_jump_destinations(struct objtool_file *file)
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if (insn->ignore || insn->offset == FAKE_JUMP_OFFSET)
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continue;
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rela = find_rela_by_dest_range(file->elf, insn->sec,
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reloc = find_reloc_by_dest_range(file->elf, insn->sec,
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insn->offset, insn->len);
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if (!rela) {
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if (!reloc) {
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dest_sec = insn->sec;
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dest_off = arch_jump_destination(insn);
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} else if (rela->sym->type == STT_SECTION) {
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dest_sec = rela->sym->sec;
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dest_off = arch_dest_rela_offset(rela->addend);
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} else if (rela->sym->sec->idx) {
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dest_sec = rela->sym->sec;
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dest_off = rela->sym->sym.st_value +
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arch_dest_rela_offset(rela->addend);
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} else if (strstr(rela->sym->name, "_indirect_thunk_")) {
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} else if (reloc->sym->type == STT_SECTION) {
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dest_sec = reloc->sym->sec;
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dest_off = arch_dest_reloc_offset(reloc->addend);
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} else if (reloc->sym->sec->idx) {
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dest_sec = reloc->sym->sec;
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dest_off = reloc->sym->sym.st_value +
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arch_dest_reloc_offset(reloc->addend);
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} else if (strstr(reloc->sym->name, "_indirect_thunk_")) {
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/*
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* Retpoline jumps are really dynamic jumps in
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* disguise, so convert them accordingly.
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@ -625,7 +625,7 @@ static int add_jump_destinations(struct objtool_file *file)
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continue;
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} else {
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/* external sibling call */
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insn->call_dest = rela->sym;
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insn->call_dest = reloc->sym;
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continue;
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}
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@ -701,15 +701,15 @@ static int add_call_destinations(struct objtool_file *file)
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{
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struct instruction *insn;
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unsigned long dest_off;
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struct rela *rela;
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struct reloc *reloc;
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for_each_insn(file, insn) {
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if (insn->type != INSN_CALL)
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continue;
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rela = find_rela_by_dest_range(file->elf, insn->sec,
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reloc = find_reloc_by_dest_range(file->elf, insn->sec,
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insn->offset, insn->len);
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if (!rela) {
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if (!reloc) {
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dest_off = arch_jump_destination(insn);
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insn->call_dest = find_func_by_offset(insn->sec, dest_off);
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if (!insn->call_dest)
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@ -729,19 +729,19 @@ static int add_call_destinations(struct objtool_file *file)
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return -1;
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}
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} else if (rela->sym->type == STT_SECTION) {
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dest_off = arch_dest_rela_offset(rela->addend);
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insn->call_dest = find_func_by_offset(rela->sym->sec,
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} else if (reloc->sym->type == STT_SECTION) {
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dest_off = arch_dest_reloc_offset(reloc->addend);
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insn->call_dest = find_func_by_offset(reloc->sym->sec,
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dest_off);
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if (!insn->call_dest) {
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WARN_FUNC("can't find call dest symbol at %s+0x%lx",
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insn->sec, insn->offset,
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rela->sym->sec->name,
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reloc->sym->sec->name,
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dest_off);
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return -1;
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}
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} else
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insn->call_dest = rela->sym;
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insn->call_dest = reloc->sym;
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/*
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* Whatever stack impact regular CALLs have, should be undone
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@ -849,7 +849,7 @@ static int handle_group_alt(struct objtool_file *file,
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*/
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if ((insn->offset != special_alt->new_off ||
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(insn->type != INSN_CALL && !is_static_jump(insn))) &&
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find_rela_by_dest_range(file->elf, insn->sec, insn->offset, insn->len)) {
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find_reloc_by_dest_range(file->elf, insn->sec, insn->offset, insn->len)) {
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WARN_FUNC("unsupported relocation in alternatives section",
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insn->sec, insn->offset);
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@ -995,34 +995,34 @@ out:
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}
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static int add_jump_table(struct objtool_file *file, struct instruction *insn,
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struct rela *table)
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struct reloc *table)
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{
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struct rela *rela = table;
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struct reloc *reloc = table;
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struct instruction *dest_insn;
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struct alternative *alt;
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struct symbol *pfunc = insn->func->pfunc;
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unsigned int prev_offset = 0;
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/*
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* Each @rela is a switch table relocation which points to the target
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* Each @reloc is a switch table relocation which points to the target
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* instruction.
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*/
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list_for_each_entry_from(rela, &table->sec->rela_list, list) {
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list_for_each_entry_from(reloc, &table->sec->reloc_list, list) {
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/* Check for the end of the table: */
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if (rela != table && rela->jump_table_start)
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if (reloc != table && reloc->jump_table_start)
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break;
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/* Make sure the table entries are consecutive: */
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if (prev_offset && rela->offset != prev_offset + 8)
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if (prev_offset && reloc->offset != prev_offset + 8)
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break;
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/* Detect function pointers from contiguous objects: */
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if (rela->sym->sec == pfunc->sec &&
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rela->addend == pfunc->offset)
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if (reloc->sym->sec == pfunc->sec &&
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reloc->addend == pfunc->offset)
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break;
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dest_insn = find_insn(file, rela->sym->sec, rela->addend);
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dest_insn = find_insn(file, reloc->sym->sec, reloc->addend);
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if (!dest_insn)
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break;
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@ -1038,7 +1038,7 @@ static int add_jump_table(struct objtool_file *file, struct instruction *insn,
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alt->insn = dest_insn;
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list_add_tail(&alt->list, &insn->alts);
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prev_offset = rela->offset;
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prev_offset = reloc->offset;
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}
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if (!prev_offset) {
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@ -1093,11 +1093,11 @@ static int add_jump_table(struct objtool_file *file, struct instruction *insn,
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*
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* NOTE: RETPOLINE made it harder still to decode dynamic jumps.
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*/
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static struct rela *find_jump_table(struct objtool_file *file,
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static struct reloc *find_jump_table(struct objtool_file *file,
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struct symbol *func,
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struct instruction *insn)
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{
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struct rela *text_rela, *table_rela;
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struct reloc *text_reloc, *table_reloc;
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struct instruction *dest_insn, *orig_insn = insn;
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struct section *table_sec;
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unsigned long table_offset;
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@ -1122,16 +1122,16 @@ static struct rela *find_jump_table(struct objtool_file *file,
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break;
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/* look for a relocation which references .rodata */
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text_rela = find_rela_by_dest_range(file->elf, insn->sec,
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text_reloc = find_reloc_by_dest_range(file->elf, insn->sec,
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insn->offset, insn->len);
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if (!text_rela || text_rela->sym->type != STT_SECTION ||
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!text_rela->sym->sec->rodata)
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if (!text_reloc || text_reloc->sym->type != STT_SECTION ||
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!text_reloc->sym->sec->rodata)
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continue;
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table_offset = text_rela->addend;
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table_sec = text_rela->sym->sec;
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table_offset = text_reloc->addend;
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table_sec = text_reloc->sym->sec;
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if (text_rela->type == R_X86_64_PC32)
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if (text_reloc->type == R_X86_64_PC32)
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table_offset += 4;
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/*
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@ -1148,14 +1148,14 @@ static struct rela *find_jump_table(struct objtool_file *file,
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continue;
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/*
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* Each table entry has a rela associated with it. The rela
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* Each table entry has a reloc associated with it. The reloc
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* should reference text in the same function as the original
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* instruction.
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*/
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table_rela = find_rela_by_dest(file->elf, table_sec, table_offset);
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if (!table_rela)
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table_reloc = find_reloc_by_dest(file->elf, table_sec, table_offset);
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if (!table_reloc)
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continue;
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dest_insn = find_insn(file, table_rela->sym->sec, table_rela->addend);
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dest_insn = find_insn(file, table_reloc->sym->sec, table_reloc->addend);
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if (!dest_insn || !dest_insn->func || dest_insn->func->pfunc != func)
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continue;
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@ -1164,10 +1164,10 @@ static struct rela *find_jump_table(struct objtool_file *file,
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* indicates a rare GCC quirk/bug which can leave dead code
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* behind.
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*/
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if (text_rela->type == R_X86_64_PC32)
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if (text_reloc->type == R_X86_64_PC32)
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file->ignore_unreachables = true;
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return table_rela;
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return table_reloc;
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}
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return NULL;
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@ -1181,7 +1181,7 @@ static void mark_func_jump_tables(struct objtool_file *file,
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struct symbol *func)
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{
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struct instruction *insn, *last = NULL;
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struct rela *rela;
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struct reloc *reloc;
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func_for_each_insn(file, func, insn) {
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if (!last)
|
||||
@ -1204,10 +1204,10 @@ static void mark_func_jump_tables(struct objtool_file *file,
|
||||
if (insn->type != INSN_JUMP_DYNAMIC)
|
||||
continue;
|
||||
|
||||
rela = find_jump_table(file, func, insn);
|
||||
if (rela) {
|
||||
rela->jump_table_start = true;
|
||||
insn->jump_table = rela;
|
||||
reloc = find_jump_table(file, func, insn);
|
||||
if (reloc) {
|
||||
reloc->jump_table_start = true;
|
||||
insn->jump_table = reloc;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -1261,8 +1261,8 @@ static int add_jump_table_alts(struct objtool_file *file)
|
||||
|
||||
static int read_unwind_hints(struct objtool_file *file)
|
||||
{
|
||||
struct section *sec, *relasec;
|
||||
struct rela *rela;
|
||||
struct section *sec, *relocsec;
|
||||
struct reloc *reloc;
|
||||
struct unwind_hint *hint;
|
||||
struct instruction *insn;
|
||||
struct cfi_reg *cfa;
|
||||
@ -1272,8 +1272,8 @@ static int read_unwind_hints(struct objtool_file *file)
|
||||
if (!sec)
|
||||
return 0;
|
||||
|
||||
relasec = sec->rela;
|
||||
if (!relasec) {
|
||||
relocsec = sec->reloc;
|
||||
if (!relocsec) {
|
||||
WARN("missing .rela.discard.unwind_hints section");
|
||||
return -1;
|
||||
}
|
||||
@ -1288,13 +1288,13 @@ static int read_unwind_hints(struct objtool_file *file)
|
||||
for (i = 0; i < sec->len / sizeof(struct unwind_hint); i++) {
|
||||
hint = (struct unwind_hint *)sec->data->d_buf + i;
|
||||
|
||||
rela = find_rela_by_dest(file->elf, sec, i * sizeof(*hint));
|
||||
if (!rela) {
|
||||
WARN("can't find rela for unwind_hints[%d]", i);
|
||||
reloc = find_reloc_by_dest(file->elf, sec, i * sizeof(*hint));
|
||||
if (!reloc) {
|
||||
WARN("can't find reloc for unwind_hints[%d]", i);
|
||||
return -1;
|
||||
}
|
||||
|
||||
insn = find_insn(file, rela->sym->sec, rela->addend);
|
||||
insn = find_insn(file, reloc->sym->sec, reloc->addend);
|
||||
if (!insn) {
|
||||
WARN("can't find insn for unwind_hints[%d]", i);
|
||||
return -1;
|
||||
@ -1352,19 +1352,19 @@ static int read_retpoline_hints(struct objtool_file *file)
|
||||
{
|
||||
struct section *sec;
|
||||
struct instruction *insn;
|
||||
struct rela *rela;
|
||||
struct reloc *reloc;
|
||||
|
||||
sec = find_section_by_name(file->elf, ".rela.discard.retpoline_safe");
|
||||
if (!sec)
|
||||
return 0;
|
||||
|
||||
list_for_each_entry(rela, &sec->rela_list, list) {
|
||||
if (rela->sym->type != STT_SECTION) {
|
||||
list_for_each_entry(reloc, &sec->reloc_list, list) {
|
||||
if (reloc->sym->type != STT_SECTION) {
|
||||
WARN("unexpected relocation symbol type in %s", sec->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
insn = find_insn(file, rela->sym->sec, rela->addend);
|
||||
insn = find_insn(file, reloc->sym->sec, reloc->addend);
|
||||
if (!insn) {
|
||||
WARN("bad .discard.retpoline_safe entry");
|
||||
return -1;
|
||||
@ -1387,19 +1387,19 @@ static int read_instr_hints(struct objtool_file *file)
|
||||
{
|
||||
struct section *sec;
|
||||
struct instruction *insn;
|
||||
struct rela *rela;
|
||||
struct reloc *reloc;
|
||||
|
||||
sec = find_section_by_name(file->elf, ".rela.discard.instr_end");
|
||||
if (!sec)
|
||||
return 0;
|
||||
|
||||
list_for_each_entry(rela, &sec->rela_list, list) {
|
||||
if (rela->sym->type != STT_SECTION) {
|
||||
list_for_each_entry(reloc, &sec->reloc_list, list) {
|
||||
if (reloc->sym->type != STT_SECTION) {
|
||||
WARN("unexpected relocation symbol type in %s", sec->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
insn = find_insn(file, rela->sym->sec, rela->addend);
|
||||
insn = find_insn(file, reloc->sym->sec, reloc->addend);
|
||||
if (!insn) {
|
||||
WARN("bad .discard.instr_end entry");
|
||||
return -1;
|
||||
@ -1412,13 +1412,13 @@ static int read_instr_hints(struct objtool_file *file)
|
||||
if (!sec)
|
||||
return 0;
|
||||
|
||||
list_for_each_entry(rela, &sec->rela_list, list) {
|
||||
if (rela->sym->type != STT_SECTION) {
|
||||
list_for_each_entry(reloc, &sec->reloc_list, list) {
|
||||
if (reloc->sym->type != STT_SECTION) {
|
||||
WARN("unexpected relocation symbol type in %s", sec->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
insn = find_insn(file, rela->sym->sec, rela->addend);
|
||||
insn = find_insn(file, reloc->sym->sec, reloc->addend);
|
||||
if (!insn) {
|
||||
WARN("bad .discard.instr_begin entry");
|
||||
return -1;
|
||||
@ -1434,22 +1434,22 @@ static int read_intra_function_calls(struct objtool_file *file)
|
||||
{
|
||||
struct instruction *insn;
|
||||
struct section *sec;
|
||||
struct rela *rela;
|
||||
struct reloc *reloc;
|
||||
|
||||
sec = find_section_by_name(file->elf, ".rela.discard.intra_function_calls");
|
||||
if (!sec)
|
||||
return 0;
|
||||
|
||||
list_for_each_entry(rela, &sec->rela_list, list) {
|
||||
list_for_each_entry(reloc, &sec->reloc_list, list) {
|
||||
unsigned long dest_off;
|
||||
|
||||
if (rela->sym->type != STT_SECTION) {
|
||||
if (reloc->sym->type != STT_SECTION) {
|
||||
WARN("unexpected relocation symbol type in %s",
|
||||
sec->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
insn = find_insn(file, rela->sym->sec, rela->addend);
|
||||
insn = find_insn(file, reloc->sym->sec, reloc->addend);
|
||||
if (!insn) {
|
||||
WARN("bad .discard.intra_function_call entry");
|
||||
return -1;
|
||||
|
||||
@ -37,7 +37,7 @@ struct instruction {
|
||||
struct symbol *call_dest;
|
||||
struct instruction *jump_dest;
|
||||
struct instruction *first_jump_src;
|
||||
struct rela *jump_table;
|
||||
struct reloc *jump_table;
|
||||
struct list_head alts;
|
||||
struct symbol *func;
|
||||
struct list_head stack_ops;
|
||||
|
||||
@ -228,26 +228,26 @@ struct symbol *find_symbol_by_name(const struct elf *elf, const char *name)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
struct rela *find_rela_by_dest_range(const struct elf *elf, struct section *sec,
|
||||
struct reloc *find_reloc_by_dest_range(const struct elf *elf, struct section *sec,
|
||||
unsigned long offset, unsigned int len)
|
||||
{
|
||||
struct rela *rela, *r = NULL;
|
||||
struct reloc *reloc, *r = NULL;
|
||||
unsigned long o;
|
||||
|
||||
if (!sec->rela)
|
||||
if (!sec->reloc)
|
||||
return NULL;
|
||||
|
||||
sec = sec->rela;
|
||||
sec = sec->reloc;
|
||||
|
||||
for_offset_range(o, offset, offset + len) {
|
||||
elf_hash_for_each_possible(elf->rela_hash, rela, hash,
|
||||
elf_hash_for_each_possible(elf->reloc_hash, reloc, hash,
|
||||
sec_offset_hash(sec, o)) {
|
||||
if (rela->sec != sec)
|
||||
if (reloc->sec != sec)
|
||||
continue;
|
||||
|
||||
if (rela->offset >= offset && rela->offset < offset + len) {
|
||||
if (!r || rela->offset < r->offset)
|
||||
r = rela;
|
||||
if (reloc->offset >= offset && reloc->offset < offset + len) {
|
||||
if (!r || reloc->offset < r->offset)
|
||||
r = reloc;
|
||||
}
|
||||
}
|
||||
if (r)
|
||||
@ -257,9 +257,9 @@ struct rela *find_rela_by_dest_range(const struct elf *elf, struct section *sec,
|
||||
return NULL;
|
||||
}
|
||||
|
||||
struct rela *find_rela_by_dest(const struct elf *elf, struct section *sec, unsigned long offset)
|
||||
struct reloc *find_reloc_by_dest(const struct elf *elf, struct section *sec, unsigned long offset)
|
||||
{
|
||||
return find_rela_by_dest_range(elf, sec, offset, 1);
|
||||
return find_reloc_by_dest_range(elf, sec, offset, 1);
|
||||
}
|
||||
|
||||
static int read_sections(struct elf *elf)
|
||||
@ -288,7 +288,7 @@ static int read_sections(struct elf *elf)
|
||||
memset(sec, 0, sizeof(*sec));
|
||||
|
||||
INIT_LIST_HEAD(&sec->symbol_list);
|
||||
INIT_LIST_HEAD(&sec->rela_list);
|
||||
INIT_LIST_HEAD(&sec->reloc_list);
|
||||
|
||||
s = elf_getscn(elf->elf, i);
|
||||
if (!s) {
|
||||
@ -488,21 +488,21 @@ err:
|
||||
return -1;
|
||||
}
|
||||
|
||||
void elf_add_rela(struct elf *elf, struct rela *rela)
|
||||
void elf_add_reloc(struct elf *elf, struct reloc *reloc)
|
||||
{
|
||||
struct section *sec = rela->sec;
|
||||
struct section *sec = reloc->sec;
|
||||
|
||||
list_add_tail(&rela->list, &sec->rela_list);
|
||||
elf_hash_add(elf->rela_hash, &rela->hash, rela_hash(rela));
|
||||
list_add_tail(&reloc->list, &sec->reloc_list);
|
||||
elf_hash_add(elf->reloc_hash, &reloc->hash, reloc_hash(reloc));
|
||||
}
|
||||
|
||||
static int read_relas(struct elf *elf)
|
||||
static int read_relocs(struct elf *elf)
|
||||
{
|
||||
struct section *sec;
|
||||
struct rela *rela;
|
||||
struct reloc *reloc;
|
||||
int i;
|
||||
unsigned int symndx;
|
||||
unsigned long nr_rela, max_rela = 0, tot_rela = 0;
|
||||
unsigned long nr_reloc, max_reloc = 0, tot_reloc = 0;
|
||||
|
||||
list_for_each_entry(sec, &elf->sections, list) {
|
||||
if (sec->sh.sh_type != SHT_RELA)
|
||||
@ -510,49 +510,49 @@ static int read_relas(struct elf *elf)
|
||||
|
||||
sec->base = find_section_by_index(elf, sec->sh.sh_info);
|
||||
if (!sec->base) {
|
||||
WARN("can't find base section for rela section %s",
|
||||
WARN("can't find base section for reloc section %s",
|
||||
sec->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
sec->base->rela = sec;
|
||||
sec->base->reloc = sec;
|
||||
|
||||
nr_rela = 0;
|
||||
nr_reloc = 0;
|
||||
for (i = 0; i < sec->sh.sh_size / sec->sh.sh_entsize; i++) {
|
||||
rela = malloc(sizeof(*rela));
|
||||
if (!rela) {
|
||||
reloc = malloc(sizeof(*reloc));
|
||||
if (!reloc) {
|
||||
perror("malloc");
|
||||
return -1;
|
||||
}
|
||||
memset(rela, 0, sizeof(*rela));
|
||||
memset(reloc, 0, sizeof(*reloc));
|
||||
|
||||
if (!gelf_getrela(sec->data, i, &rela->rela)) {
|
||||
if (!gelf_getrela(sec->data, i, &reloc->rela)) {
|
||||
WARN_ELF("gelf_getrela");
|
||||
return -1;
|
||||
}
|
||||
|
||||
rela->type = GELF_R_TYPE(rela->rela.r_info);
|
||||
rela->addend = rela->rela.r_addend;
|
||||
rela->offset = rela->rela.r_offset;
|
||||
symndx = GELF_R_SYM(rela->rela.r_info);
|
||||
rela->sym = find_symbol_by_index(elf, symndx);
|
||||
rela->sec = sec;
|
||||
if (!rela->sym) {
|
||||
WARN("can't find rela entry symbol %d for %s",
|
||||
reloc->type = GELF_R_TYPE(reloc->rela.r_info);
|
||||
reloc->addend = reloc->rela.r_addend;
|
||||
reloc->offset = reloc->rela.r_offset;
|
||||
symndx = GELF_R_SYM(reloc->rela.r_info);
|
||||
reloc->sym = find_symbol_by_index(elf, symndx);
|
||||
reloc->sec = sec;
|
||||
if (!reloc->sym) {
|
||||
WARN("can't find reloc entry symbol %d for %s",
|
||||
symndx, sec->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
elf_add_rela(elf, rela);
|
||||
nr_rela++;
|
||||
elf_add_reloc(elf, reloc);
|
||||
nr_reloc++;
|
||||
}
|
||||
max_rela = max(max_rela, nr_rela);
|
||||
tot_rela += nr_rela;
|
||||
max_reloc = max(max_reloc, nr_reloc);
|
||||
tot_reloc += nr_reloc;
|
||||
}
|
||||
|
||||
if (stats) {
|
||||
printf("max_rela: %lu\n", max_rela);
|
||||
printf("tot_rela: %lu\n", tot_rela);
|
||||
printf("max_reloc: %lu\n", max_reloc);
|
||||
printf("tot_reloc: %lu\n", tot_reloc);
|
||||
}
|
||||
|
||||
return 0;
|
||||
@ -578,7 +578,7 @@ struct elf *elf_open_read(const char *name, int flags)
|
||||
elf_hash_init(elf->symbol_name_hash);
|
||||
elf_hash_init(elf->section_hash);
|
||||
elf_hash_init(elf->section_name_hash);
|
||||
elf_hash_init(elf->rela_hash);
|
||||
elf_hash_init(elf->reloc_hash);
|
||||
|
||||
elf->fd = open(name, flags);
|
||||
if (elf->fd == -1) {
|
||||
@ -611,7 +611,7 @@ struct elf *elf_open_read(const char *name, int flags)
|
||||
if (read_symbols(elf))
|
||||
goto err;
|
||||
|
||||
if (read_relas(elf))
|
||||
if (read_relocs(elf))
|
||||
goto err;
|
||||
|
||||
return elf;
|
||||
@ -637,7 +637,7 @@ struct section *elf_create_section(struct elf *elf, const char *name,
|
||||
memset(sec, 0, sizeof(*sec));
|
||||
|
||||
INIT_LIST_HEAD(&sec->symbol_list);
|
||||
INIT_LIST_HEAD(&sec->rela_list);
|
||||
INIT_LIST_HEAD(&sec->reloc_list);
|
||||
|
||||
s = elf_newscn(elf->elf);
|
||||
if (!s) {
|
||||
@ -722,25 +722,25 @@ struct section *elf_create_section(struct elf *elf, const char *name,
|
||||
return sec;
|
||||
}
|
||||
|
||||
struct section *elf_create_rela_section(struct elf *elf, struct section *base)
|
||||
struct section *elf_create_reloc_section(struct elf *elf, struct section *base)
|
||||
{
|
||||
char *relaname;
|
||||
char *relocname;
|
||||
struct section *sec;
|
||||
|
||||
relaname = malloc(strlen(base->name) + strlen(".rela") + 1);
|
||||
if (!relaname) {
|
||||
relocname = malloc(strlen(base->name) + strlen(".rela") + 1);
|
||||
if (!relocname) {
|
||||
perror("malloc");
|
||||
return NULL;
|
||||
}
|
||||
strcpy(relaname, ".rela");
|
||||
strcat(relaname, base->name);
|
||||
strcpy(relocname, ".rela");
|
||||
strcat(relocname, base->name);
|
||||
|
||||
sec = elf_create_section(elf, relaname, sizeof(GElf_Rela), 0);
|
||||
free(relaname);
|
||||
sec = elf_create_section(elf, relocname, sizeof(GElf_Rela), 0);
|
||||
free(relocname);
|
||||
if (!sec)
|
||||
return NULL;
|
||||
|
||||
base->rela = sec;
|
||||
base->reloc = sec;
|
||||
sec->base = base;
|
||||
|
||||
sec->sh.sh_type = SHT_RELA;
|
||||
@ -752,33 +752,33 @@ struct section *elf_create_rela_section(struct elf *elf, struct section *base)
|
||||
return sec;
|
||||
}
|
||||
|
||||
int elf_rebuild_rela_section(struct section *sec)
|
||||
int elf_rebuild_reloc_section(struct section *sec)
|
||||
{
|
||||
struct rela *rela;
|
||||
struct reloc *reloc;
|
||||
int nr, idx = 0, size;
|
||||
GElf_Rela *relas;
|
||||
GElf_Rela *relocs;
|
||||
|
||||
nr = 0;
|
||||
list_for_each_entry(rela, &sec->rela_list, list)
|
||||
list_for_each_entry(reloc, &sec->reloc_list, list)
|
||||
nr++;
|
||||
|
||||
size = nr * sizeof(*relas);
|
||||
relas = malloc(size);
|
||||
if (!relas) {
|
||||
size = nr * sizeof(*relocs);
|
||||
relocs = malloc(size);
|
||||
if (!relocs) {
|
||||
perror("malloc");
|
||||
return -1;
|
||||
}
|
||||
|
||||
sec->data->d_buf = relas;
|
||||
sec->data->d_buf = relocs;
|
||||
sec->data->d_size = size;
|
||||
|
||||
sec->sh.sh_size = size;
|
||||
|
||||
idx = 0;
|
||||
list_for_each_entry(rela, &sec->rela_list, list) {
|
||||
relas[idx].r_offset = rela->offset;
|
||||
relas[idx].r_addend = rela->addend;
|
||||
relas[idx].r_info = GELF_R_INFO(rela->sym->idx, rela->type);
|
||||
list_for_each_entry(reloc, &sec->reloc_list, list) {
|
||||
relocs[idx].r_offset = reloc->offset;
|
||||
relocs[idx].r_addend = reloc->addend;
|
||||
relocs[idx].r_info = GELF_R_INFO(reloc->sym->idx, reloc->type);
|
||||
idx++;
|
||||
}
|
||||
|
||||
@ -821,7 +821,7 @@ void elf_close(struct elf *elf)
|
||||
{
|
||||
struct section *sec, *tmpsec;
|
||||
struct symbol *sym, *tmpsym;
|
||||
struct rela *rela, *tmprela;
|
||||
struct reloc *reloc, *tmpreloc;
|
||||
|
||||
if (elf->elf)
|
||||
elf_end(elf->elf);
|
||||
@ -835,10 +835,10 @@ void elf_close(struct elf *elf)
|
||||
hash_del(&sym->hash);
|
||||
free(sym);
|
||||
}
|
||||
list_for_each_entry_safe(rela, tmprela, &sec->rela_list, list) {
|
||||
list_del(&rela->list);
|
||||
hash_del(&rela->hash);
|
||||
free(rela);
|
||||
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);
|
||||
|
||||
@ -32,8 +32,8 @@ struct section {
|
||||
GElf_Shdr sh;
|
||||
struct rb_root symbol_tree;
|
||||
struct list_head symbol_list;
|
||||
struct list_head rela_list;
|
||||
struct section *base, *rela;
|
||||
struct list_head reloc_list;
|
||||
struct section *base, *reloc;
|
||||
struct symbol *sym;
|
||||
Elf_Data *data;
|
||||
char *name;
|
||||
@ -58,7 +58,7 @@ struct symbol {
|
||||
bool uaccess_safe;
|
||||
};
|
||||
|
||||
struct rela {
|
||||
struct reloc {
|
||||
struct list_head list;
|
||||
struct hlist_node hash;
|
||||
GElf_Rela rela;
|
||||
@ -82,7 +82,7 @@ struct elf {
|
||||
DECLARE_HASHTABLE(symbol_name_hash, ELF_HASH_BITS);
|
||||
DECLARE_HASHTABLE(section_hash, ELF_HASH_BITS);
|
||||
DECLARE_HASHTABLE(section_name_hash, ELF_HASH_BITS);
|
||||
DECLARE_HASHTABLE(rela_hash, ELF_HASH_BITS);
|
||||
DECLARE_HASHTABLE(reloc_hash, ELF_HASH_BITS);
|
||||
};
|
||||
|
||||
#define OFFSET_STRIDE_BITS 4
|
||||
@ -109,15 +109,15 @@ static inline u32 sec_offset_hash(struct section *sec, unsigned long offset)
|
||||
return ol;
|
||||
}
|
||||
|
||||
static inline u32 rela_hash(struct rela *rela)
|
||||
static inline u32 reloc_hash(struct reloc *reloc)
|
||||
{
|
||||
return sec_offset_hash(rela->sec, rela->offset);
|
||||
return sec_offset_hash(reloc->sec, reloc->offset);
|
||||
}
|
||||
|
||||
struct elf *elf_open_read(const char *name, int flags);
|
||||
struct section *elf_create_section(struct elf *elf, const char *name, size_t entsize, int nr);
|
||||
struct section *elf_create_rela_section(struct elf *elf, struct section *base);
|
||||
void elf_add_rela(struct elf *elf, struct rela *rela);
|
||||
struct section *elf_create_reloc_section(struct elf *elf, struct section *base);
|
||||
void elf_add_reloc(struct elf *elf, struct reloc *reloc);
|
||||
int elf_write(const struct elf *elf);
|
||||
void elf_close(struct elf *elf);
|
||||
|
||||
@ -126,11 +126,11 @@ struct symbol *find_func_by_offset(struct section *sec, unsigned long offset);
|
||||
struct symbol *find_symbol_by_offset(struct section *sec, unsigned long offset);
|
||||
struct symbol *find_symbol_by_name(const struct elf *elf, const char *name);
|
||||
struct symbol *find_symbol_containing(const struct section *sec, unsigned long offset);
|
||||
struct rela *find_rela_by_dest(const struct elf *elf, struct section *sec, unsigned long offset);
|
||||
struct rela *find_rela_by_dest_range(const struct elf *elf, struct section *sec,
|
||||
struct reloc *find_reloc_by_dest(const struct elf *elf, struct section *sec, unsigned long offset);
|
||||
struct reloc *find_reloc_by_dest_range(const struct elf *elf, struct section *sec,
|
||||
unsigned long offset, unsigned int len);
|
||||
struct symbol *find_func_containing(struct section *sec, unsigned long offset);
|
||||
int elf_rebuild_rela_section(struct section *sec);
|
||||
int elf_rebuild_reloc_section(struct section *sec);
|
||||
|
||||
#define for_each_sec(file, sec) \
|
||||
list_for_each_entry(sec, &file->elf->sections, list)
|
||||
|
||||
@ -80,56 +80,56 @@ int create_orc(struct objtool_file *file)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int create_orc_entry(struct elf *elf, struct section *u_sec, struct section *ip_relasec,
|
||||
static int create_orc_entry(struct elf *elf, struct section *u_sec, struct section *ip_relocsec,
|
||||
unsigned int idx, struct section *insn_sec,
|
||||
unsigned long insn_off, struct orc_entry *o)
|
||||
{
|
||||
struct orc_entry *orc;
|
||||
struct rela *rela;
|
||||
struct reloc *reloc;
|
||||
|
||||
/* populate ORC data */
|
||||
orc = (struct orc_entry *)u_sec->data->d_buf + idx;
|
||||
memcpy(orc, o, sizeof(*orc));
|
||||
|
||||
/* populate rela for ip */
|
||||
rela = malloc(sizeof(*rela));
|
||||
if (!rela) {
|
||||
/* populate reloc for ip */
|
||||
reloc = malloc(sizeof(*reloc));
|
||||
if (!reloc) {
|
||||
perror("malloc");
|
||||
return -1;
|
||||
}
|
||||
memset(rela, 0, sizeof(*rela));
|
||||
memset(reloc, 0, sizeof(*reloc));
|
||||
|
||||
if (insn_sec->sym) {
|
||||
rela->sym = insn_sec->sym;
|
||||
rela->addend = insn_off;
|
||||
reloc->sym = insn_sec->sym;
|
||||
reloc->addend = insn_off;
|
||||
} else {
|
||||
/*
|
||||
* The Clang assembler doesn't produce section symbols, so we
|
||||
* have to reference the function symbol instead:
|
||||
*/
|
||||
rela->sym = find_symbol_containing(insn_sec, insn_off);
|
||||
if (!rela->sym) {
|
||||
reloc->sym = find_symbol_containing(insn_sec, insn_off);
|
||||
if (!reloc->sym) {
|
||||
/*
|
||||
* Hack alert. This happens when we need to reference
|
||||
* the NOP pad insn immediately after the function.
|
||||
*/
|
||||
rela->sym = find_symbol_containing(insn_sec,
|
||||
reloc->sym = find_symbol_containing(insn_sec,
|
||||
insn_off - 1);
|
||||
}
|
||||
if (!rela->sym) {
|
||||
if (!reloc->sym) {
|
||||
WARN("missing symbol for insn at offset 0x%lx\n",
|
||||
insn_off);
|
||||
return -1;
|
||||
}
|
||||
|
||||
rela->addend = insn_off - rela->sym->offset;
|
||||
reloc->addend = insn_off - reloc->sym->offset;
|
||||
}
|
||||
|
||||
rela->type = R_X86_64_PC32;
|
||||
rela->offset = idx * sizeof(int);
|
||||
rela->sec = ip_relasec;
|
||||
reloc->type = R_X86_64_PC32;
|
||||
reloc->offset = idx * sizeof(int);
|
||||
reloc->sec = ip_relocsec;
|
||||
|
||||
elf_add_rela(elf, rela);
|
||||
elf_add_reloc(elf, reloc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -137,7 +137,7 @@ static int create_orc_entry(struct elf *elf, struct section *u_sec, struct secti
|
||||
int create_orc_sections(struct objtool_file *file)
|
||||
{
|
||||
struct instruction *insn, *prev_insn;
|
||||
struct section *sec, *u_sec, *ip_relasec;
|
||||
struct section *sec, *u_sec, *ip_relocsec;
|
||||
unsigned int idx;
|
||||
|
||||
struct orc_entry empty = {
|
||||
@ -181,8 +181,8 @@ int create_orc_sections(struct objtool_file *file)
|
||||
if (!sec)
|
||||
return -1;
|
||||
|
||||
ip_relasec = elf_create_rela_section(file->elf, sec);
|
||||
if (!ip_relasec)
|
||||
ip_relocsec = elf_create_reloc_section(file->elf, sec);
|
||||
if (!ip_relocsec)
|
||||
return -1;
|
||||
|
||||
/* create .orc_unwind section */
|
||||
@ -200,7 +200,7 @@ int create_orc_sections(struct objtool_file *file)
|
||||
if (!prev_insn || memcmp(&insn->orc, &prev_insn->orc,
|
||||
sizeof(struct orc_entry))) {
|
||||
|
||||
if (create_orc_entry(file->elf, u_sec, ip_relasec, idx,
|
||||
if (create_orc_entry(file->elf, u_sec, ip_relocsec, idx,
|
||||
insn->sec, insn->offset,
|
||||
&insn->orc))
|
||||
return -1;
|
||||
@ -212,7 +212,7 @@ int create_orc_sections(struct objtool_file *file)
|
||||
|
||||
/* section terminator */
|
||||
if (prev_insn) {
|
||||
if (create_orc_entry(file->elf, u_sec, ip_relasec, idx,
|
||||
if (create_orc_entry(file->elf, u_sec, ip_relocsec, idx,
|
||||
prev_insn->sec,
|
||||
prev_insn->offset + prev_insn->len,
|
||||
&empty))
|
||||
@ -222,7 +222,7 @@ int create_orc_sections(struct objtool_file *file)
|
||||
}
|
||||
}
|
||||
|
||||
if (elf_rebuild_rela_section(ip_relasec))
|
||||
if (elf_rebuild_reloc_section(ip_relocsec))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
|
||||
@ -72,7 +72,7 @@ static int get_alt_entry(struct elf *elf, struct special_entry *entry,
|
||||
struct section *sec, int idx,
|
||||
struct special_alt *alt)
|
||||
{
|
||||
struct rela *orig_rela, *new_rela;
|
||||
struct reloc *orig_reloc, *new_reloc;
|
||||
unsigned long offset;
|
||||
|
||||
offset = idx * entry->size;
|
||||
@ -118,30 +118,30 @@ static int get_alt_entry(struct elf *elf, struct special_entry *entry,
|
||||
}
|
||||
}
|
||||
|
||||
orig_rela = find_rela_by_dest(elf, sec, offset + entry->orig);
|
||||
if (!orig_rela) {
|
||||
WARN_FUNC("can't find orig rela", sec, offset + entry->orig);
|
||||
orig_reloc = find_reloc_by_dest(elf, sec, offset + entry->orig);
|
||||
if (!orig_reloc) {
|
||||
WARN_FUNC("can't find orig reloc", sec, offset + entry->orig);
|
||||
return -1;
|
||||
}
|
||||
if (orig_rela->sym->type != STT_SECTION) {
|
||||
WARN_FUNC("don't know how to handle non-section rela symbol %s",
|
||||
sec, offset + entry->orig, orig_rela->sym->name);
|
||||
if (orig_reloc->sym->type != STT_SECTION) {
|
||||
WARN_FUNC("don't know how to handle non-section reloc symbol %s",
|
||||
sec, offset + entry->orig, orig_reloc->sym->name);
|
||||
return -1;
|
||||
}
|
||||
|
||||
alt->orig_sec = orig_rela->sym->sec;
|
||||
alt->orig_off = orig_rela->addend;
|
||||
alt->orig_sec = orig_reloc->sym->sec;
|
||||
alt->orig_off = orig_reloc->addend;
|
||||
|
||||
if (!entry->group || alt->new_len) {
|
||||
new_rela = find_rela_by_dest(elf, sec, offset + entry->new);
|
||||
if (!new_rela) {
|
||||
WARN_FUNC("can't find new rela",
|
||||
new_reloc = find_reloc_by_dest(elf, sec, offset + entry->new);
|
||||
if (!new_reloc) {
|
||||
WARN_FUNC("can't find new reloc",
|
||||
sec, offset + entry->new);
|
||||
return -1;
|
||||
}
|
||||
|
||||
alt->new_sec = new_rela->sym->sec;
|
||||
alt->new_off = (unsigned int)new_rela->addend;
|
||||
alt->new_sec = new_reloc->sym->sec;
|
||||
alt->new_off = (unsigned int)new_reloc->addend;
|
||||
|
||||
/* _ASM_EXTABLE_EX hack */
|
||||
if (alt->new_off >= 0x7ffffff0)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user