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Diffstat (limited to 'src/crypto/cpu-arm-linux.c')
-rw-r--r--src/crypto/cpu-arm-linux.c80
1 files changed, 40 insertions, 40 deletions
diff --git a/src/crypto/cpu-arm-linux.c b/src/crypto/cpu-arm-linux.c
index 95bb5ee3..a5f1f8ac 100644
--- a/src/crypto/cpu-arm-linux.c
+++ b/src/crypto/cpu-arm-linux.c
@@ -34,15 +34,15 @@
#define HWCAP_NEON (1 << 12)
-/* See /usr/include/asm/hwcap.h on an ARM installation for the source of
- * these values. */
+// See /usr/include/asm/hwcap.h on an ARM installation for the source of
+// these values.
#define HWCAP2_AES (1 << 0)
#define HWCAP2_PMULL (1 << 1)
#define HWCAP2_SHA1 (1 << 2)
#define HWCAP2_SHA2 (1 << 3)
-/* |getauxval| is not available on Android until API level 20. Link it as a weak
- * symbol and use other methods as fallback. */
+// |getauxval| is not available on Android until API level 20. Link it as a weak
+// symbol and use other methods as fallback.
unsigned long getauxval(unsigned long type) __attribute__((weak));
static int open_eintr(const char *path, int flags) {
@@ -61,8 +61,8 @@ static ssize_t read_eintr(int fd, void *out, size_t len) {
return ret;
}
-/* read_full reads exactly |len| bytes from |fd| to |out|. On error or end of
- * file, it returns zero. */
+// read_full reads exactly |len| bytes from |fd| to |out|. On error or end of
+// file, it returns zero.
static int read_full(int fd, void *out, size_t len) {
char *outp = out;
while (len > 0) {
@@ -76,9 +76,9 @@ static int read_full(int fd, void *out, size_t len) {
return 1;
}
-/* read_file opens |path| and reads until end-of-file. On success, it returns
- * one and sets |*out_ptr| and |*out_len| to a newly-allocated buffer with the
- * contents. Otherwise, it returns zero. */
+// read_file opens |path| and reads until end-of-file. On success, it returns
+// one and sets |*out_ptr| and |*out_len| to a newly-allocated buffer with the
+// contents. Otherwise, it returns zero.
static int read_file(char **out_ptr, size_t *out_len, const char *path) {
int fd = open_eintr(path, O_RDONLY);
if (fd < 0) {
@@ -128,7 +128,7 @@ err:
return ret;
}
-/* getauxval_proc behaves like |getauxval| but reads from /proc/self/auxv. */
+// getauxval_proc behaves like |getauxval| but reads from /proc/self/auxv.
static unsigned long getauxval_proc(unsigned long type) {
int fd = open_eintr("/proc/self/auxv", O_RDONLY);
if (fd < 0) {
@@ -164,16 +164,16 @@ static int STRING_PIECE_equals(const STRING_PIECE *a, const char *b) {
return a->len == b_len && OPENSSL_memcmp(a->data, b, b_len) == 0;
}
-/* STRING_PIECE_split finds the first occurence of |sep| in |in| and, if found,
- * sets |*out_left| and |*out_right| to |in| split before and after it. It
- * returns one if |sep| was found and zero otherwise. */
+// STRING_PIECE_split finds the first occurence of |sep| in |in| and, if found,
+// sets |*out_left| and |*out_right| to |in| split before and after it. It
+// returns one if |sep| was found and zero otherwise.
static int STRING_PIECE_split(STRING_PIECE *out_left, STRING_PIECE *out_right,
const STRING_PIECE *in, char sep) {
const char *p = OPENSSL_memchr(in->data, sep, in->len);
if (p == NULL) {
return 0;
}
- /* |out_left| or |out_right| may alias |in|, so make a copy. */
+ // |out_left| or |out_right| may alias |in|, so make a copy.
STRING_PIECE in_copy = *in;
out_left->data = in_copy.data;
out_left->len = p - in_copy.data;
@@ -182,7 +182,7 @@ static int STRING_PIECE_split(STRING_PIECE *out_left, STRING_PIECE *out_right,
return 1;
}
-/* STRING_PIECE_trim removes leading and trailing whitespace from |s|. */
+// STRING_PIECE_trim removes leading and trailing whitespace from |s|.
static void STRING_PIECE_trim(STRING_PIECE *s) {
while (s->len != 0 && (s->data[0] == ' ' || s->data[0] == '\t')) {
s->data++;
@@ -194,12 +194,12 @@ static void STRING_PIECE_trim(STRING_PIECE *s) {
}
}
-/* extract_cpuinfo_field extracts a /proc/cpuinfo field named |field| from
- * |in|. If found, it sets |*out| to the value and returns one. Otherwise, it
- * returns zero. */
+// extract_cpuinfo_field extracts a /proc/cpuinfo field named |field| from
+// |in|. If found, it sets |*out| to the value and returns one. Otherwise, it
+// returns zero.
static int extract_cpuinfo_field(STRING_PIECE *out, const STRING_PIECE *in,
const char *field) {
- /* Process |in| one line at a time. */
+ // Process |in| one line at a time.
STRING_PIECE remaining = *in, line;
while (STRING_PIECE_split(&line, &remaining, &remaining, '\n')) {
STRING_PIECE key, value;
@@ -224,8 +224,8 @@ static int cpuinfo_field_equals(const STRING_PIECE *cpuinfo, const char *field,
STRING_PIECE_equals(&extracted, value);
}
-/* has_list_item treats |list| as a space-separated list of items and returns
- * one if |item| is contained in |list| and zero otherwise. */
+// has_list_item treats |list| as a space-separated list of items and returns
+// one if |item| is contained in |list| and zero otherwise.
static int has_list_item(const STRING_PIECE *list, const char *item) {
STRING_PIECE remaining = *list, feature;
while (STRING_PIECE_split(&feature, &remaining, &remaining, ' ')) {
@@ -238,11 +238,11 @@ static int has_list_item(const STRING_PIECE *list, const char *item) {
static unsigned long get_hwcap_cpuinfo(const STRING_PIECE *cpuinfo) {
if (cpuinfo_field_equals(cpuinfo, "CPU architecture", "8")) {
- /* This is a 32-bit ARM binary running on a 64-bit kernel. NEON is always
- * available on ARMv8. Linux omits required features, so reading the
- * "Features" line does not work. (For simplicity, use strict equality. We
- * assume everything running on future ARM architectures will have a
- * working |getauxval|.) */
+ // This is a 32-bit ARM binary running on a 64-bit kernel. NEON is always
+ // available on ARMv8. Linux omits required features, so reading the
+ // "Features" line does not work. (For simplicity, use strict equality. We
+ // assume everything running on future ARM architectures will have a
+ // working |getauxval|.)
return HWCAP_NEON;
}
@@ -276,8 +276,8 @@ static unsigned long get_hwcap2_cpuinfo(const STRING_PIECE *cpuinfo) {
return ret;
}
-/* has_broken_neon returns one if |in| matches a CPU known to have a broken
- * NEON unit. See https://crbug.com/341598. */
+// has_broken_neon returns one if |in| matches a CPU known to have a broken
+// NEON unit. See https://crbug.com/341598.
static int has_broken_neon(const STRING_PIECE *cpuinfo) {
return cpuinfo_field_equals(cpuinfo, "CPU implementer", "0x51") &&
cpuinfo_field_equals(cpuinfo, "CPU architecture", "7") &&
@@ -300,13 +300,13 @@ void OPENSSL_cpuid_setup(void) {
cpuinfo.data = cpuinfo_data;
cpuinfo.len = cpuinfo_len;
- /* |getauxval| is not available on Android until API level 20. If it is
- * unavailable, read from /proc/self/auxv as a fallback. This is unreadable
- * on some versions of Android, so further fall back to /proc/cpuinfo.
- *
- * See
- * https://android.googlesource.com/platform/ndk/+/882ac8f3392858991a0e1af33b4b7387ec856bd2
- * and b/13679666 (Google-internal) for details. */
+ // |getauxval| is not available on Android until API level 20. If it is
+ // unavailable, read from /proc/self/auxv as a fallback. This is unreadable
+ // on some versions of Android, so further fall back to /proc/cpuinfo.
+ //
+ // See
+ // https://android.googlesource.com/platform/ndk/+/882ac8f3392858991a0e1af33b4b7387ec856bd2
+ // and b/13679666 (Google-internal) for details.
unsigned long hwcap = 0;
if (getauxval != NULL) {
hwcap = getauxval(AT_HWCAP);
@@ -318,18 +318,18 @@ void OPENSSL_cpuid_setup(void) {
hwcap = get_hwcap_cpuinfo(&cpuinfo);
}
- /* Clear NEON support if known broken. */
+ // Clear NEON support if known broken.
g_has_broken_neon = has_broken_neon(&cpuinfo);
if (g_has_broken_neon) {
hwcap &= ~HWCAP_NEON;
}
- /* Matching OpenSSL, only report other features if NEON is present. */
+ // Matching OpenSSL, only report other features if NEON is present.
if (hwcap & HWCAP_NEON) {
OPENSSL_armcap_P |= ARMV7_NEON;
- /* Some ARMv8 Android devices don't expose AT_HWCAP2. Fall back to
- * /proc/cpuinfo. See https://crbug.com/596156. */
+ // Some ARMv8 Android devices don't expose AT_HWCAP2. Fall back to
+ // /proc/cpuinfo. See https://crbug.com/596156.
unsigned long hwcap2 = 0;
if (getauxval != NULL) {
hwcap2 = getauxval(AT_HWCAP2);
@@ -357,4 +357,4 @@ void OPENSSL_cpuid_setup(void) {
int CRYPTO_has_broken_NEON(void) { return g_has_broken_neon; }
-#endif /* OPENSSL_ARM && !OPENSSL_STATIC_ARMCAP */
+#endif // OPENSSL_ARM && !OPENSSL_STATIC_ARMCAP
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 08:29:17 +0000