tools/perf/arch/x86/tests/insn-x86.c

   1 #include <linux/types.h>
   2
   3 #include "debug.h"
   4 #include "tests/tests.h"
   5 #include "arch-tests.h"
   6
   7 #include "intel-pt-decoder/insn.h"
   8 #include "intel-pt-decoder/intel-pt-insn-decoder.h"
   9
  10 struct test_data {
  11         u8 data[MAX_INSN_SIZE];
  12         int expected_length;
  13         int expected_rel;
  14         const char *expected_op_str;
  15         const char *expected_branch_str;
  16         const char *asm_rep;
  17 };
  18
  19 struct test_data test_data_32[] = {
  20 #include "insn-x86-dat-32.c"
  21         {{0x0f, 0x01, 0xee}, 3, 0, NULL, NULL, "0f 01 ee             \trdpkru"},
  22         {{0x0f, 0x01, 0xef}, 3, 0, NULL, NULL, "0f 01 ef             \twrpkru"},
  23         {{0}, 0, 0, NULL, NULL, NULL},
  24 };
  25
  26 struct test_data test_data_64[] = {
  27 #include "insn-x86-dat-64.c"
  28         {{0x0f, 0x01, 0xee}, 3, 0, NULL, NULL, "0f 01 ee             \trdpkru"},
  29         {{0x0f, 0x01, 0xef}, 3, 0, NULL, NULL, "0f 01 ef             \twrpkru"},
  30         {{0}, 0, 0, NULL, NULL, NULL},
  31 };
  32
  33 static int get_op(const char *op_str)
  34 {
  35         struct val_data {
  36                 const char *name;
  37                 int val;
  38         } vals[] = {
  39                 {"other",   INTEL_PT_OP_OTHER},
  40                 {"call",    INTEL_PT_OP_CALL},
  41                 {"ret",     INTEL_PT_OP_RET},
  42                 {"jcc",     INTEL_PT_OP_JCC},
  43                 {"jmp",     INTEL_PT_OP_JMP},
  44                 {"loop",    INTEL_PT_OP_LOOP},
  45                 {"iret",    INTEL_PT_OP_IRET},
  46                 {"int",     INTEL_PT_OP_INT},
  47                 {"syscall", INTEL_PT_OP_SYSCALL},
  48                 {"sysret",  INTEL_PT_OP_SYSRET},
  49                 {NULL, 0},
  50         };
  51         struct val_data *val;
  52
  53         if (!op_str || !strlen(op_str))
  54                 return 0;
  55
  56         for (val = vals; val->name; val++) {
  57                 if (!strcmp(val->name, op_str))
  58                         return val->val;
  59         }
  60
  61         pr_debug("Failed to get op\n");
  62
  63         return -1;
  64 }
  65
  66 static int get_branch(const char *branch_str)
  67 {
  68         struct val_data {
  69                 const char *name;
  70                 int val;
  71         } vals[] = {
  72                 {"no_branch",     INTEL_PT_BR_NO_BRANCH},
  73                 {"indirect",      INTEL_PT_BR_INDIRECT},
  74                 {"conditional",   INTEL_PT_BR_CONDITIONAL},
  75                 {"unconditional", INTEL_PT_BR_UNCONDITIONAL},
  76                 {NULL, 0},
  77         };
  78         struct val_data *val;
  79
  80         if (!branch_str || !strlen(branch_str))
  81                 return 0;
  82
  83         for (val = vals; val->name; val++) {
  84                 if (!strcmp(val->name, branch_str))
  85                         return val->val;
  86         }
  87
  88         pr_debug("Failed to get branch\n");
  89
  90         return -1;
  91 }
  92
  93 static int test_data_item(struct test_data *dat, int x86_64)
  94 {
  95         struct intel_pt_insn intel_pt_insn;
  96         struct insn insn;
  97         int op, branch;
  98
  99         insn_init(&insn, dat->data, MAX_INSN_SIZE, x86_64);
 100         insn_get_length(&insn);
 101
 102         if (!insn_complete(&insn)) {
 103                 pr_debug("Failed to decode: %s\n", dat->asm_rep);
 104                 return -1;
 105         }
 106
 107         if (insn.length != dat->expected_length) {
 108                 pr_debug("Failed to decode length (%d vs expected %d): %s\n",
 109                          insn.length, dat->expected_length, dat->asm_rep);
 110                 return -1;
 111         }
 112
 113         op = get_op(dat->expected_op_str);
 114         branch = get_branch(dat->expected_branch_str);
 115
 116         if (intel_pt_get_insn(dat->data, MAX_INSN_SIZE, x86_64, &intel_pt_insn)) {
 117                 pr_debug("Intel PT failed to decode: %s\n", dat->asm_rep);
 118                 return -1;
 119         }
 120
 121         if ((int)intel_pt_insn.op != op) {
 122                 pr_debug("Failed to decode 'op' value (%d vs expected %d): %s\n",
 123                          intel_pt_insn.op, op, dat->asm_rep);
 124                 return -1;
 125         }
 126
 127         if ((int)intel_pt_insn.branch != branch) {
 128                 pr_debug("Failed to decode 'branch' value (%d vs expected %d): %s\n",
 129                          intel_pt_insn.branch, branch, dat->asm_rep);
 130                 return -1;
 131         }
 132
 133         if (intel_pt_insn.rel != dat->expected_rel) {
 134                 pr_debug("Failed to decode 'rel' value (%#x vs expected %#x): %s\n",
 135                          intel_pt_insn.rel, dat->expected_rel, dat->asm_rep);
 136                 return -1;
 137         }
 138
 139         pr_debug("Decoded ok: %s\n", dat->asm_rep);
 140
 141         return 0;
 142 }
 143
 144 static int test_data_set(struct test_data *dat_set, int x86_64)
 145 {
 146         struct test_data *dat;
 147         int ret = 0;
 148
 149         for (dat = dat_set; dat->expected_length; dat++) {
 150                 if (test_data_item(dat, x86_64))
 151                         ret = -1;
 152         }
 153
 154         return ret;
 155 }
 156
 157 /**
 158  * test__insn_x86 - test x86 instruction decoder - new instructions.
 159  *
 160  * This function implements a test that decodes a selection of instructions and
 161  * checks the results.  The Intel PT function that further categorizes
 162  * instructions (i.e. intel_pt_get_insn()) is also checked.
 163  *
 164  * The instructions are originally in insn-x86-dat-src.c which has been
 165  * processed by scripts gen-insn-x86-dat.sh and gen-insn-x86-dat.awk to produce
 166  * insn-x86-dat-32.c and insn-x86-dat-64.c which are included into this program.
 167  * i.e. to add new instructions to the test, edit insn-x86-dat-src.c, run the
 168  * gen-insn-x86-dat.sh script, make perf, and then run the test.
 169  *
 170  * If the test passes %0 is returned, otherwise %-1 is returned.  Use the
 171  * verbose (-v) option to see all the instructions and whether or not they
 172  * decoded successfuly.
 173  */
 174 int test__insn_x86(int subtest __maybe_unused)
 175 {
 176         int ret = 0;
 177
 178         if (test_data_set(test_data_32, 0))
 179                 ret = -1;
 180
 181         if (test_data_set(test_data_64, 1))
 182                 ret = -1;
 183
 184         return ret;
 185 }