#pragma once #include "arm64/assemble.h" #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, UNUSED struct arch_dis_ctx arch, bool force) { intptr_t diff = (dpc & ~0xfff) - (pc & ~0xfff); if (!(diff >= -0x100000000 && diff < 0x100000000)) return force ? 16 : -1; else if (!(dpc & 0xfff)) return 8; else return 12; } static inline void make_jump_patch(void **codep, uintptr_t pc, uintptr_t dpc, UNUSED struct arch_dis_ctx arch) { int reg = 15; 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); }