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