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-rw-r--r--lib/arm64/assemble.h4
-rw-r--r--lib/arm64/jump-patch.h13
-rw-r--r--lib/arm64/transform-dis-arm64.inc.h1
3 files changed, 14 insertions, 4 deletions
diff --git a/lib/arm64/assemble.h b/lib/arm64/assemble.h
index 00797e9..c20c219 100644
--- a/lib/arm64/assemble.h
+++ b/lib/arm64/assemble.h
@@ -47,7 +47,9 @@ static inline void ADRP_ADD(void **codep, int reg, uint64_t pc, uint64_t dpc) {
/* ADD reg, reg, #lo */
op32(codep, 0x91000000 | reg | reg << 5 | lo << 10);
}
- /* BR reg */
+}
+
+static inline void BR(void **codep, int reg) {
op32(codep, 0xd61f0000 | reg << 5);
}
diff --git a/lib/arm64/jump-patch.h b/lib/arm64/jump-patch.h
index f0f149f..c42c730 100644
--- a/lib/arm64/jump-patch.h
+++ b/lib/arm64/jump-patch.h
@@ -3,10 +3,11 @@
#define MAX_JUMP_PATCH_SIZE 12
#define MAX_REWRITTEN_SIZE (7 * 2 * 4) /* also conservative */
static inline int jump_patch_size(uintptr_t pc, uintptr_t dpc,
- struct arch_dis_ctx arch) {
+ struct arch_dis_ctx arch,
+ bool force) {
intptr_t diff = (dpc & ~0xfff) - (pc & ~0xfff);
if (!(diff >= -0x100000000 && diff < 0x100000000))
- return -1;
+ return force ? 16 : -1;
else if (pc & 0xfff)
return 8;
else
@@ -15,5 +16,11 @@ static inline int jump_patch_size(uintptr_t pc, uintptr_t dpc,
static inline void make_jump_patch(void **codep, uintptr_t pc, uintptr_t dpc,
struct arch_dis_ctx arch) {
- ADRP_ADD(codep, 12 /* XXX */, pc, dpc);
+ int reg = 12; /* XXX */
+ intptr_t diff = (dpc & ~0xfff) - (pc & ~0xfff);
+ if (!(diff >= -0x100000000 && diff < 0x100000000))
+ MOVi64(codep, reg, dpc);
+ else
+ ADRP_ADD(codep, reg, pc, dpc);
+ BR(codep, reg);
}
diff --git a/lib/arm64/transform-dis-arm64.inc.h b/lib/arm64/transform-dis-arm64.inc.h
index 3710b73..682613a 100644
--- a/lib/arm64/transform-dis-arm64.inc.h
+++ b/lib/arm64/transform-dis-arm64.inc.h
@@ -1,3 +1,4 @@
+#include "arm64/assemble.h"
static NOINLINE UNUSED void transform_dis_pcrel(struct transform_dis_ctx *ctx,
uintptr_t dpc, unsigned reg, enum pcrel_load_mode load_mode) {