static void
test_thumb_relocator_fixture_setup (TestThumbRelocatorFixture * fixture,
gconstpointer data)
{
fixture->output = (guint8 *) gum_alloc_n_pages (1, GUM_PAGE_RW);
gum_thumb_writer_init (&fixture->tw, fixture->output);
}
static void
gum_write_thunk (gpointer thunk,
GumCodeDeflectorDispatcher * dispatcher)
{
# if defined (HAVE_ARM)
GumThumbWriter tw;
gum_thumb_writer_init (&tw, thunk);
tw.pc = GUM_ADDRESS (dispatcher->thunk);
gum_thumb_writer_put_push_regs (&tw, 2, ARM_REG_R9, ARM_REG_R12);
gum_thumb_writer_put_call_address_with_arguments (&tw,
GUM_ADDRESS (gum_code_deflector_dispatcher_lookup), 2,
GUM_ARG_ADDRESS, GUM_ADDRESS (dispatcher),
GUM_ARG_REGISTER, ARM_REG_LR);
gum_thumb_writer_put_pop_regs (&tw, 2, ARM_REG_R9, ARM_REG_R12);
gum_thumb_writer_put_bx_reg (&tw, ARM_REG_R0);
gum_thumb_writer_clear (&tw);
# elif defined (HAVE_ARM64)
GumArm64Writer aw;
gum_arm64_writer_init (&aw, thunk);
aw.pc = GUM_ADDRESS (dispatcher->thunk);
/* push {q0-q7} */
gum_arm64_writer_put_instruction (&aw, 0xadbf1fe6);
gum_arm64_writer_put_instruction (&aw, 0xadbf17e4);
gum_arm64_writer_put_instruction (&aw, 0xadbf0fe2);
gum_arm64_writer_put_instruction (&aw, 0xadbf07e0);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X17, ARM64_REG_X18);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X15, ARM64_REG_X16);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X13, ARM64_REG_X14);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X11, ARM64_REG_X12);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X9, ARM64_REG_X10);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X7, ARM64_REG_X8);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X5, ARM64_REG_X6);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X3, ARM64_REG_X4);
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X1, ARM64_REG_X2);
gum_arm64_writer_put_call_address_with_arguments (&aw,
GUM_ADDRESS (gum_code_deflector_dispatcher_lookup), 2,
GUM_ARG_ADDRESS, GUM_ADDRESS (dispatcher),
GUM_ARG_REGISTER, ARM64_REG_LR);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X1, ARM64_REG_X2);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X3, ARM64_REG_X4);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X5, ARM64_REG_X6);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X7, ARM64_REG_X8);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X9, ARM64_REG_X10);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X11, ARM64_REG_X12);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X13, ARM64_REG_X14);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X15, ARM64_REG_X16);
gum_arm64_writer_put_pop_reg_reg (&aw, ARM64_REG_X17, ARM64_REG_X18);
/* pop {q0-q7} */
gum_arm64_writer_put_instruction (&aw, 0xacc107e0);
gum_arm64_writer_put_instruction (&aw, 0xacc10fe2);
gum_arm64_writer_put_instruction (&aw, 0xacc117e4);
gum_arm64_writer_put_instruction (&aw, 0xacc11fe6);
gum_arm64_writer_put_br_reg (&aw, ARM64_REG_X0);
gum_arm64_writer_clear (&aw);
# else
(void) gum_code_deflector_dispatcher_lookup;
# endif
}
static void
gum_insert_deflector (gpointer cave,
GumInsertDeflectorContext * ctx)
{
# if defined (HAVE_ARM)
GumCodeDeflectorDispatcher * dispatcher = ctx->dispatcher;
GumThumbWriter tw;
if (ctx->dedicated_target != NULL)
{
gboolean owner_is_arm;
owner_is_arm = (GPOINTER_TO_SIZE (ctx->return_address) & 1) == 0;
if (owner_is_arm)
{
GumArmWriter aw;
gum_arm_writer_init (&aw, cave);
aw.pc = ctx->pc;
gum_arm_writer_put_ldr_reg_address (&aw, ARM_REG_PC,
GUM_ADDRESS (ctx->dedicated_target));
gum_arm_writer_flush (&aw);
g_assert (gum_arm_writer_offset (&aw) <= ctx->max_size);
gum_arm_writer_clear (&aw);
dispatcher->trampoline = GSIZE_TO_POINTER (ctx->pc);
return;
}
gum_thumb_writer_init (&tw, cave);
tw.pc = ctx->pc;
gum_thumb_writer_put_ldr_reg_address (&tw, ARM_REG_PC,
GUM_ADDRESS (ctx->dedicated_target));
}
else
{
gum_thumb_writer_init (&tw, cave);
tw.pc = ctx->pc;
gum_thumb_writer_put_ldr_reg_address (&tw, ARM_REG_PC,
GUM_ADDRESS (dispatcher->thunk) + 1);
}
gum_thumb_writer_flush (&tw);
g_assert (gum_thumb_writer_offset (&tw) <= ctx->max_size);
gum_thumb_writer_clear (&tw);
dispatcher->trampoline = GSIZE_TO_POINTER (ctx->pc + 1);
# elif defined (HAVE_ARM64)
GumCodeDeflectorDispatcher * dispatcher = ctx->dispatcher;
GumArm64Writer aw;
gum_arm64_writer_init (&aw, cave);
aw.pc = ctx->pc;
if (ctx->dedicated_target != NULL)
{
gum_arm64_writer_put_push_reg_reg (&aw, ARM64_REG_X0, ARM64_REG_LR);
gum_arm64_writer_put_ldr_reg_address (&aw, ARM64_REG_X0,
GUM_ADDRESS (ctx->dedicated_target));
gum_arm64_writer_put_br_reg (&aw, ARM64_REG_X0);
}
else
{
gum_arm64_writer_put_ldr_reg_address (&aw, ARM64_REG_X0,
GUM_ADDRESS (dispatcher->thunk));
gum_arm64_writer_put_br_reg (&aw, ARM64_REG_X0);
}
gum_arm64_writer_flush (&aw);
g_assert (gum_arm64_writer_offset (&aw) <= ctx->max_size);
gum_arm64_writer_clear (&aw);
dispatcher->trampoline = GSIZE_TO_POINTER (ctx->pc);
# else
(void) gum_code_deflector_dispatcher_lookup;
# endif
}
