perf-eh_elf/arch/s390/annotate/instructions.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

174 lines
3.7 KiB
C

// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
static int s390_call__parse(struct arch *arch, struct ins_operands *ops,
struct map_symbol *ms)
{
char *endptr, *tok, *name;
struct map *map = ms->map;
struct addr_map_symbol target = {
.map = map,
};
tok = strchr(ops->raw, ',');
if (!tok)
return -1;
ops->target.addr = strtoull(tok + 1, &endptr, 16);
name = strchr(endptr, '<');
if (name == NULL)
return -1;
name++;
if (arch->objdump.skip_functions_char &&
strchr(name, arch->objdump.skip_functions_char))
return -1;
tok = strchr(name, '>');
if (tok == NULL)
return -1;
*tok = '\0';
ops->target.name = strdup(name);
*tok = '>';
if (ops->target.name == NULL)
return -1;
target.addr = map__objdump_2mem(map, ops->target.addr);
if (map_groups__find_ams(&target) == 0 &&
map__rip_2objdump(target.map, map->map_ip(target.map, target.addr)) == ops->target.addr)
ops->target.sym = target.sym;
return 0;
}
static int call__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops);
static struct ins_ops s390_call_ops = {
.parse = s390_call__parse,
.scnprintf = call__scnprintf,
};
static int s390_mov__parse(struct arch *arch __maybe_unused,
struct ins_operands *ops,
struct map_symbol *ms __maybe_unused)
{
char *s = strchr(ops->raw, ','), *target, *endptr;
if (s == NULL)
return -1;
*s = '\0';
ops->source.raw = strdup(ops->raw);
*s = ',';
if (ops->source.raw == NULL)
return -1;
target = ++s;
ops->target.raw = strdup(target);
if (ops->target.raw == NULL)
goto out_free_source;
ops->target.addr = strtoull(target, &endptr, 16);
if (endptr == target)
goto out_free_target;
s = strchr(endptr, '<');
if (s == NULL)
goto out_free_target;
endptr = strchr(s + 1, '>');
if (endptr == NULL)
goto out_free_target;
*endptr = '\0';
ops->target.name = strdup(s + 1);
*endptr = '>';
if (ops->target.name == NULL)
goto out_free_target;
return 0;
out_free_target:
zfree(&ops->target.raw);
out_free_source:
zfree(&ops->source.raw);
return -1;
}
static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops);
static struct ins_ops s390_mov_ops = {
.parse = s390_mov__parse,
.scnprintf = mov__scnprintf,
};
static struct ins_ops *s390__associate_ins_ops(struct arch *arch, const char *name)
{
struct ins_ops *ops = NULL;
/* catch all kind of jumps */
if (strchr(name, 'j') ||
!strncmp(name, "bct", 3) ||
!strncmp(name, "br", 2))
ops = &jump_ops;
/* override call/returns */
if (!strcmp(name, "bras") ||
!strcmp(name, "brasl") ||
!strcmp(name, "basr"))
ops = &s390_call_ops;
if (!strcmp(name, "br"))
ops = &ret_ops;
/* override load/store relative to PC */
if (!strcmp(name, "lrl") ||
!strcmp(name, "lgrl") ||
!strcmp(name, "lgfrl") ||
!strcmp(name, "llgfrl") ||
!strcmp(name, "strl") ||
!strcmp(name, "stgrl"))
ops = &s390_mov_ops;
if (ops)
arch__associate_ins_ops(arch, name, ops);
return ops;
}
static int s390__cpuid_parse(struct arch *arch, char *cpuid)
{
unsigned int family;
char model[16], model_c[16], cpumf_v[16], cpumf_a[16];
int ret;
/*
* cpuid string format:
* "IBM,family,model-capacity,model[,cpum_cf-version,cpum_cf-authorization]"
*/
ret = sscanf(cpuid, "%*[^,],%u,%[^,],%[^,],%[^,],%s", &family, model_c,
model, cpumf_v, cpumf_a);
if (ret >= 2) {
arch->family = family;
arch->model = 0;
return 0;
}
return -1;
}
static int s390__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
{
int err = 0;
if (!arch->initialized) {
arch->initialized = true;
arch->associate_instruction_ops = s390__associate_ins_ops;
if (cpuid)
err = s390__cpuid_parse(arch, cpuid);
}
return err;
}