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#include "Rts.h"
#include "plt_aarch64.h"
#include <stdlib.h>
#if defined(aarch64_HOST_ARCH)
#if defined(OBJFORMAT_MACHO)
#include <mach/machine.h>
#include <mach-o/fat.h>
#include <mach-o/loader.h>
#include <mach-o/nlist.h>
#include <mach-o/reloc.h>
/* five 4 byte instructions */
const size_t instSizeAarch64 = 4;
const size_t stubSizeAarch64 = 5 * 4;
bool needStubForRelAarch64(MachORelocationInfo * rel) {
switch(rel->r_type) {
case ARM64_RELOC_BRANCH26:
return true;
default:
return false;
}
}
/* see the elf_plt_aarch64.c for the discussion on this */
bool
makeStubAarch64(Stub * s) {
uint32_t mov__hw0_x16 = 0xd2800000 | 16;
uint32_t movk_hw0_x16 = mov__hw0_x16 | (1 << 29);
uint32_t mov__hw3_x16 = mov__hw0_x16 | (3 << 21);
uint32_t movk_hw2_x16 = movk_hw0_x16 | (2 << 21);
uint32_t movk_hw1_x16 = movk_hw0_x16 | (1 << 21);
uint32_t br_x16 = 0xd61f0000 | 16 << 5;
uint32_t *P = (uint32_t*)s->addr;
/* target address */
uint64_t addr = (uint64_t)s->target;
uint16_t addr_hw0 = (uint16_t)(addr >> 0);
uint16_t addr_hw1 = (uint16_t)(addr >> 16);
uint16_t addr_hw2 = (uint16_t)(addr >> 32);
uint16_t addr_hw3 = (uint16_t)(addr >> 48);
P[0] = mov__hw3_x16 | ((uint32_t)addr_hw3 << 5);
P[1] = movk_hw2_x16 | ((uint32_t)addr_hw2 << 5);
P[2] = movk_hw1_x16 | ((uint32_t)addr_hw1 << 5);
P[3] = movk_hw0_x16 | ((uint32_t)addr_hw0 << 5);
P[4] = br_x16;
return EXIT_SUCCESS;
}
#endif
#endif
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