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// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <string.h>
#include "debug.h"
#include "tests/tests.h"
#include "arch-tests.h"
#include "../../../../arch/x86/include/asm/insn.h"
#include "intel-pt-decoder/intel-pt-insn-decoder.h"
struct test_data {
u8 data[MAX_INSN_SIZE];
int expected_length;
int expected_rel;
const char *expected_op_str;
const char *expected_branch_str;
const char *asm_rep;
};
struct test_data test_data_32[] = {
#include "insn-x86-dat-32.c"
{{0x0f, 0x01, 0xee}, 3, 0, NULL, NULL, "0f 01 ee \trdpkru"},
{{0x0f, 0x01, 0xef}, 3, 0, NULL, NULL, "0f 01 ef \twrpkru"},
{{0}, 0, 0, NULL, NULL, NULL},
};
struct test_data test_data_64[] = {
#include "insn-x86-dat-64.c"
{{0x0f, 0x01, 0xee}, 3, 0, NULL, NULL, "0f 01 ee \trdpkru"},
{{0x0f, 0x01, 0xef}, 3, 0, NULL, NULL, "0f 01 ef \twrpkru"},
{{0}, 0, 0, NULL, NULL, NULL},
};
static int get_op(const char *op_str)
{
struct val_data {
const char *name;
int val;
} vals[] = {
{"other", INTEL_PT_OP_OTHER},
{"call", INTEL_PT_OP_CALL},
{"ret", INTEL_PT_OP_RET},
{"jcc", INTEL_PT_OP_JCC},
{"jmp", INTEL_PT_OP_JMP},
{"loop", INTEL_PT_OP_LOOP},
{"iret", INTEL_PT_OP_IRET},
{"int", INTEL_PT_OP_INT},
{"syscall", INTEL_PT_OP_SYSCALL},
{"sysret", INTEL_PT_OP_SYSRET},
{"vmentry", INTEL_PT_OP_VMENTRY},
{NULL, 0},
};
struct val_data *val;
if (!op_str || !strlen(op_str))
return 0;
for (val = vals; val->name; val++) {
if (!strcmp(val->name, op_str))
return val->val;
}
pr_debug("Failed to get op\n");
return -1;
}
static int get_branch(const char *branch_str)
{
struct val_data {
const char *name;
int val;
} vals[] = {
{"no_branch", INTEL_PT_BR_NO_BRANCH},
{"indirect", INTEL_PT_BR_INDIRECT},
{"conditional", INTEL_PT_BR_CONDITIONAL},
{"unconditional", INTEL_PT_BR_UNCONDITIONAL},
{NULL, 0},
};
struct val_data *val;
if (!branch_str || !strlen(branch_str))
return 0;
for (val = vals; val->name; val++) {
if (!strcmp(val->name, branch_str))
return val->val;
}
pr_debug("Failed to get branch\n");
return -1;
}
static int test_data_item(struct test_data *dat, int x86_64)
{
struct intel_pt_insn intel_pt_insn;
int op, branch, ret;
struct insn insn;
ret = insn_decode(&insn, dat->data, MAX_INSN_SIZE,
x86_64 ? INSN_MODE_64 : INSN_MODE_32);
if (ret < 0) {
pr_debug("Failed to decode: %s\n", dat->asm_rep);
return -1;
}
if (insn.length != dat->expected_length) {
pr_debug("Failed to decode length (%d vs expected %d): %s\n",
insn.length, dat->expected_length, dat->asm_rep);
return -1;
}
op = get_op(dat->expected_op_str);
branch = get_branch(dat->expected_branch_str);
if (intel_pt_get_insn(dat->data, MAX_INSN_SIZE, x86_64, &intel_pt_insn)) {
pr_debug("Intel PT failed to decode: %s\n", dat->asm_rep);
return -1;
}
if ((int)intel_pt_insn.op != op) {
pr_debug("Failed to decode 'op' value (%d vs expected %d): %s\n",
intel_pt_insn.op, op, dat->asm_rep);
return -1;
}
if ((int)intel_pt_insn.branch != branch) {
pr_debug("Failed to decode 'branch' value (%d vs expected %d): %s\n",
intel_pt_insn.branch, branch, dat->asm_rep);
return -1;
}
if (intel_pt_insn.rel != dat->expected_rel) {
pr_debug("Failed to decode 'rel' value (%#x vs expected %#x): %s\n",
intel_pt_insn.rel, dat->expected_rel, dat->asm_rep);
return -1;
}
pr_debug("Decoded ok: %s\n", dat->asm_rep);
return 0;
}
static int test_data_set(struct test_data *dat_set, int x86_64)
{
struct test_data *dat;
int ret = 0;
for (dat = dat_set; dat->expected_length; dat++) {
if (test_data_item(dat, x86_64))
ret = -1;
}
return ret;
}
/**
* test__insn_x86 - test x86 instruction decoder - new instructions.
*
* This function implements a test that decodes a selection of instructions and
* checks the results. The Intel PT function that further categorizes
* instructions (i.e. intel_pt_get_insn()) is also checked.
*
* The instructions are originally in insn-x86-dat-src.c which has been
* processed by scripts gen-insn-x86-dat.sh and gen-insn-x86-dat.awk to produce
* insn-x86-dat-32.c and insn-x86-dat-64.c which are included into this program.
* i.e. to add new instructions to the test, edit insn-x86-dat-src.c, run the
* gen-insn-x86-dat.sh script, make perf, and then run the test.
*
* If the test passes %0 is returned, otherwise %-1 is returned. Use the
* verbose (-v) option to see all the instructions and whether or not they
* decoded successfully.
*/
int test__insn_x86(struct test *test __maybe_unused, int subtest __maybe_unused)
{
int ret = 0;
if (test_data_set(test_data_32, 0))
ret = -1;
if (test_data_set(test_data_64, 1))
ret = -1;
return ret;
}
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