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perf intel-pt: Use get_unaligned_le16() etc

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Avoid unaligned access by using get_unaligned_le16(), get_unaligned_le32()
and get_unaligned_le64().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Link: https://lore.kernel.org/r/20231005190451.175568-5-adrian.hunter@intel.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Adrian Hunter 2023-10-05 22:04:50 +03:00 committed by Namhyung Kim
parent f058fa5b07
commit 3b4fa67fc6
1 changed files with 9 additions and 8 deletions
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17
tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
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@ -10,6 +10,7 @@
#include <byteswap.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <asm-generic/unaligned.h>
#include "intel-pt-pkt-decoder.h"
@ -78,7 +79,7 @@ static int intel_pt_get_long_tnt(const unsigned char *buf, size_t len,
if (len < 8)
return INTEL_PT_NEED_MORE_BYTES;
payload = le64_to_cpu(*(uint64_t *)buf);
payload = get_unaligned_le64(buf);
for (count = 47; count; count--) {
if (payload & BIT63)
@ -119,7 +120,7 @@ static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
if (len < 4)
return INTEL_PT_NEED_MORE_BYTES;
packet->type = INTEL_PT_CBR;
packet->payload = le16_to_cpu(*(uint16_t *)(buf + 2));
packet->payload = get_unaligned_le16(buf + 2);
return 4;
}
@ -218,12 +219,12 @@ static int intel_pt_get_ptwrite(const unsigned char *buf, size_t len,
case 0:
if (len < 6)
return INTEL_PT_NEED_MORE_BYTES;
packet->payload = le32_to_cpu(*(uint32_t *)(buf + 2));
packet->payload = get_unaligned_le32(buf + 2);
return 6;
case 1:
if (len < 10)
return INTEL_PT_NEED_MORE_BYTES;
packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
packet->payload = get_unaligned_le64(buf + 2);
return 10;
default:
return INTEL_PT_BAD_PACKET;
@ -248,7 +249,7 @@ static int intel_pt_get_mwait(const unsigned char *buf, size_t len,
if (len < 10)
return INTEL_PT_NEED_MORE_BYTES;
packet->type = INTEL_PT_MWAIT;
packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
packet->payload = get_unaligned_le64(buf + 2);
return 10;
}
@ -455,13 +456,13 @@ static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte,
if (len < 3)
return INTEL_PT_NEED_MORE_BYTES;
ip_len = 2;
packet->payload = le16_to_cpu(*(uint16_t *)(buf + 1));
packet->payload = get_unaligned_le16(buf + 1);
break;
case 2:
if (len < 5)
return INTEL_PT_NEED_MORE_BYTES;
ip_len = 4;
packet->payload = le32_to_cpu(*(uint32_t *)(buf + 1));
packet->payload = get_unaligned_le32(buf + 1);
break;
case 3:
case 4:
@ -474,7 +475,7 @@ static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte,
if (len < 9)
return INTEL_PT_NEED_MORE_BYTES;
ip_len = 8;
packet->payload = le64_to_cpu(*(uint64_t *)(buf + 1));
packet->payload = get_unaligned_le64(buf + 1);
break;
default:
return INTEL_PT_BAD_PACKET;