16c00db4bb
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
96 lines
2.5 KiB
C
96 lines
2.5 KiB
C
/*
|
|
* Mapping of DWARF debug register numbers into register names.
|
|
*
|
|
* Copyright (C) 2010 Will Deacon, ARM Ltd.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <dwarf-regs.h>
|
|
#include <linux/ptrace.h> /* for struct user_pt_regs */
|
|
#include <linux/stringify.h>
|
|
#include "util.h"
|
|
|
|
struct pt_regs_dwarfnum {
|
|
const char *name;
|
|
unsigned int dwarfnum;
|
|
};
|
|
|
|
#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
|
|
#define GPR_DWARFNUM_NAME(num) \
|
|
{.name = __stringify(%x##num), .dwarfnum = num}
|
|
#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
|
|
#define DWARFNUM2OFFSET(index) \
|
|
(index * sizeof((struct user_pt_regs *)0)->regs[0])
|
|
|
|
/*
|
|
* Reference:
|
|
* http://infocenter.arm.com/help/topic/com.arm.doc.ihi0057b/IHI0057B_aadwarf64.pdf
|
|
*/
|
|
static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
|
|
GPR_DWARFNUM_NAME(0),
|
|
GPR_DWARFNUM_NAME(1),
|
|
GPR_DWARFNUM_NAME(2),
|
|
GPR_DWARFNUM_NAME(3),
|
|
GPR_DWARFNUM_NAME(4),
|
|
GPR_DWARFNUM_NAME(5),
|
|
GPR_DWARFNUM_NAME(6),
|
|
GPR_DWARFNUM_NAME(7),
|
|
GPR_DWARFNUM_NAME(8),
|
|
GPR_DWARFNUM_NAME(9),
|
|
GPR_DWARFNUM_NAME(10),
|
|
GPR_DWARFNUM_NAME(11),
|
|
GPR_DWARFNUM_NAME(12),
|
|
GPR_DWARFNUM_NAME(13),
|
|
GPR_DWARFNUM_NAME(14),
|
|
GPR_DWARFNUM_NAME(15),
|
|
GPR_DWARFNUM_NAME(16),
|
|
GPR_DWARFNUM_NAME(17),
|
|
GPR_DWARFNUM_NAME(18),
|
|
GPR_DWARFNUM_NAME(19),
|
|
GPR_DWARFNUM_NAME(20),
|
|
GPR_DWARFNUM_NAME(21),
|
|
GPR_DWARFNUM_NAME(22),
|
|
GPR_DWARFNUM_NAME(23),
|
|
GPR_DWARFNUM_NAME(24),
|
|
GPR_DWARFNUM_NAME(25),
|
|
GPR_DWARFNUM_NAME(26),
|
|
GPR_DWARFNUM_NAME(27),
|
|
GPR_DWARFNUM_NAME(28),
|
|
GPR_DWARFNUM_NAME(29),
|
|
REG_DWARFNUM_NAME("%lr", 30),
|
|
REG_DWARFNUM_NAME("%sp", 31),
|
|
REG_DWARFNUM_END,
|
|
};
|
|
|
|
/**
|
|
* get_arch_regstr() - lookup register name from it's DWARF register number
|
|
* @n: the DWARF register number
|
|
*
|
|
* get_arch_regstr() returns the name of the register in struct
|
|
* regdwarfnum_table from it's DWARF register number. If the register is not
|
|
* found in the table, this returns NULL;
|
|
*/
|
|
const char *get_arch_regstr(unsigned int n)
|
|
{
|
|
const struct pt_regs_dwarfnum *roff;
|
|
for (roff = regdwarfnum_table; roff->name != NULL; roff++)
|
|
if (roff->dwarfnum == n)
|
|
return roff->name;
|
|
return NULL;
|
|
}
|
|
|
|
int regs_query_register_offset(const char *name)
|
|
{
|
|
const struct pt_regs_dwarfnum *roff;
|
|
|
|
for (roff = regdwarfnum_table; roff->name != NULL; roff++)
|
|
if (!strcmp(roff->name, name))
|
|
return DWARFNUM2OFFSET(roff->dwarfnum);
|
|
return -EINVAL;
|
|
}
|