xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Merge branch 'core/core' into x86/build, to prevent conflicts

Browse Source 
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2018-10-06 15:51:56 +02:00
parent bce6824cc8 77ac1c02d9
commit 02678a5823
21 changed files with 226 additions and 174 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
arch/x86/kernel/jump_label.c
View File

@@ -42,55 +42,40 @@ static void __ref __jump_label_transform(struct jump_entry *entry,
void *(*poker)(void *, const void *, size_t),
int init)
{
union jump_code_union code;
union jump_code_union jmp;
const unsigned char default_nop[] = { STATIC_KEY_INIT_NOP };
const unsigned char *ideal_nop = ideal_nops[NOP_ATOMIC5];
const void *expect, *code;
int line;
jmp.jump = 0xe9;
jmp.offset = jump_entry_target(entry) -
(jump_entry_code(entry) + JUMP_LABEL_NOP_SIZE);
if (early_boot_irqs_disabled)
poker = text_poke_early;
if (type == JUMP_LABEL_JMP) {
if (init) {
/*
* Jump label is enabled for the first time.
* So we expect a default_nop...
*/
if (unlikely(memcmp((void *)entry->code, default_nop, 5)
!= 0))
bug_at((void *)entry->code, __LINE__);
expect = default_nop; line = __LINE__;
} else {
/*
* ...otherwise expect an ideal_nop. Otherwise
* something went horribly wrong.
*/
if (unlikely(memcmp((void *)entry->code, ideal_nop, 5)
!= 0))
bug_at((void *)entry->code, __LINE__);
expect = ideal_nop; line = __LINE__;
}
code.jump = 0xe9;
code.offset = entry->target -
(entry->code + JUMP_LABEL_NOP_SIZE);
code = &jmp.code;
} else {
/*
* We are disabling this jump label. If it is not what
* we think it is, then something must have gone wrong.
* If this is the first initialization call, then we
* are converting the default nop to the ideal nop.
*/
if (init) {
if (unlikely(memcmp((void *)entry->code, default_nop, 5) != 0))
bug_at((void *)entry->code, __LINE__);
expect = default_nop; line = __LINE__;
} else {
code.jump = 0xe9;
code.offset = entry->target -
(entry->code + JUMP_LABEL_NOP_SIZE);
if (unlikely(memcmp((void *)entry->code, &code, 5) != 0))
bug_at((void *)entry->code, __LINE__);
expect = &jmp.code; line = __LINE__;
}
memcpy(&code, ideal_nops[NOP_ATOMIC5], JUMP_LABEL_NOP_SIZE);
code = ideal_nop;
}
if (memcmp((void *)jump_entry_code(entry), expect, JUMP_LABEL_NOP_SIZE))
bug_at((void *)jump_entry_code(entry), line);
/*
* Make text_poke_bp() a default fallback poker.
*
@@ -99,11 +84,14 @@ static void __ref __jump_label_transform(struct jump_entry *entry,
* always nop being the 'currently valid' instruction
*
*/
if (poker)
(*poker)((void *)entry->code, &code, JUMP_LABEL_NOP_SIZE);
else
text_poke_bp((void *)entry->code, &code, JUMP_LABEL_NOP_SIZE,
(void *)entry->code + JUMP_LABEL_NOP_SIZE);
if (poker) {
(*poker)((void *)jump_entry_code(entry), code,
JUMP_LABEL_NOP_SIZE);
return;
}
text_poke_bp((void *)jump_entry_code(entry), code, JUMP_LABEL_NOP_SIZE,
(void *)jump_entry_code(entry) + JUMP_LABEL_NOP_SIZE);
}
void arch_jump_label_transform(struct jump_entry *entry,

6
arch/x86/kernel/module.c
View File

@@ -201,6 +201,12 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
goto overflow;
#endif
break;
case R_X86_64_PC64:
if (*(u64 *)loc != 0)
goto invalid_relocation;
val -= (u64)loc;
*(u64 *)loc = val;
break;
default:
pr_err("%s: Unknown rela relocation: %llu\n",
me->name, ELF64_R_TYPE(rel[i].r_info));