perf-eh_elf/arch/x86/tests/insn-x86.c
Linus Torvalds 16c00db4bb Merge tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
Pull AFS fixes from David Howells:
 "Here's a set of patches that fix a number of bugs in the in-kernel AFS
  client, including:

   - Fix directory locking to not use individual page locks for
     directory reading/scanning but rather to use a semaphore on the
     afs_vnode struct as the directory contents must be read in a single
     blob and data from different reads must not be mixed as the entire
     contents may be shuffled about between reads.

   - Fix address list parsing to handle port specifiers correctly.

   - Only give up callback records on a server if we actually talked to
     that server (we might not be able to access a server).

   - Fix some callback handling bugs, including refcounting,
     whole-volume callbacks and when callbacks actually get broken in
     response to a CB.CallBack op.

   - Fix some server/address rotation bugs, including giving up if we
     can't probe a server; giving up if a server says it doesn't have a
     volume, but there are more servers to try.

   - Fix the decoding of fetched statuses to be OpenAFS compatible.

   - Fix the handling of server lookups in Cache Manager ops (such as
     CB.InitCallBackState3) to use a UUID if possible and to handle no
     server being found.

   - Fix a bug in server lookup where not all addresses are compared.

   - Fix the non-encryption of calls that prevents some servers from
     being accessed (this also requires an AF_RXRPC patch that has
     already gone in through the net tree).

  There's also a patch that adds tracepoints to log Cache Manager ops
  that don't find a matching server, either by UUID or by address"

* tag 'afs-fixes-20180514' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs:
  afs: Fix the non-encryption of calls
  afs: Fix CB.CallBack handling
  afs: Fix whole-volume callback handling
  afs: Fix afs_find_server search loop
  afs: Fix the handling of an unfound server in CM operations
  afs: Add a tracepoint to record callbacks from unlisted servers
  afs: Fix the handling of CB.InitCallBackState3 to find the server by UUID
  afs: Fix VNOVOL handling in address rotation
  afs: Fix AFSFetchStatus decoder to provide OpenAFS compatibility
  afs: Fix server rotation's handling of fileserver probe failure
  afs: Fix refcounting in callback registration
  afs: Fix giving up callbacks on server destruction
  afs: Fix address list parsing
  afs: Fix directory page locking
2018-05-15 10:48:36 -07:00

186 lines
4.6 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include "debug.h"
#include "tests/tests.h"
#include "arch-tests.h"
#include "intel-pt-decoder/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},
{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;
struct insn insn;
int op, branch;
insn_init(&insn, dat->data, MAX_INSN_SIZE, x86_64);
insn_get_length(&insn);
if (!insn_complete(&insn)) {
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 successfuly.
*/
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;
}