android-libboringssl: Fix build on glibc >= 2.41

Backport fix to avoid redefining constants introduced in glibc 2.41.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Khem Raj <khem.raj@oss.qualcomm.com>
This commit is contained in:
Alex Kiernan
2026-06-13 08:30:27 +01:00
committed by Khem Raj
parent b94dcd3256
commit a116a325dd
2 changed files with 178 additions and 6 deletions
@@ -0,0 +1,172 @@
From 950b8565e333e2ed1a515e2b342009a33ef51733 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergio=20G=C3=B3mez?=
<sergio.gdr@collabora.corp-partner.google.com>
Date: Tue, 15 Apr 2025 17:57:46 -0500
Subject: [PATCH] Avoid redefining constants introduced in glibc 2.41.
These constants are now available through <sys/auxv.h> when using
glibc >= 2.41, so we get re-define compilation errors.
Just rename them by prefixing them with "CRYPTO_" to avoid the
collision.
Change-Id: I61807d8dfc8b5f482ec6191cb41aebfa5676c5b6
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/78527
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Reviewed-by: Adam Langley <agl@google.com>
Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Upstream-Status: Backport [https://github.com/google/boringssl/commit/ff9475331e72936bc1c00fcda6d4820ba67d4dae]
Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
---
src/crypto/cpu_arm_linux.c | 33 +++++++++++++++++++++++++++-----
src/crypto/cpu_arm_linux.h | 20 ++++++++++---------
src/crypto/cpu_arm_linux_test.cc | 12 +++++++-----
3 files changed, 46 insertions(+), 19 deletions(-)
diff --git a/src/crypto/cpu_arm_linux.c b/src/crypto/cpu_arm_linux.c
index d13ac215c4df..7c7cd9dd93f4 100644
--- a/src/crypto/cpu_arm_linux.c
+++ b/src/crypto/cpu_arm_linux.c
@@ -112,7 +112,11 @@ void OPENSSL_cpuid_setup(void) {
// Matching OpenSSL, only report other features if NEON is present.
unsigned long hwcap = getauxval(AT_HWCAP);
- if (hwcap & HWCAP_NEON) {
+ if (hwcap & CRYPTO_HWCAP_NEON) {
+#if defined(HWCAP_ARM_NEON)
+ static_assert(HWCAP_ARM_NEON == CRYPTO_HWCAP_NEON,
+ "CRYPTO_HWCAP values must match Linux");
+#endif
OPENSSL_armcap_P |= ARMV7_NEON;
// Some ARMv8 Android devices don't expose AT_HWCAP2. Fall back to
@@ -126,16 +130,35 @@ void OPENSSL_cpuid_setup(void) {
g_needs_hwcap2_workaround = hwcap2 != 0;
}
- if (hwcap2 & HWCAP2_AES) {
+ // HWCAP2_* values, without the "CRYPTO_" prefix, are exposed through
+ // <sys/auxv.h> in some versions of glibc(>= 2.41). Assert that we don't
+ // diverge from those values.
+ if (hwcap2 & CRYPTO_HWCAP2_AES) {
+#if defined(HWCAP2_AES)
+ static_assert(HWCAP2_AES == CRYPTO_HWCAP2_AES,
+ "CRYPTO_HWCAP2 values must match Linux");
+#endif
OPENSSL_armcap_P |= ARMV8_AES;
}
- if (hwcap2 & HWCAP2_PMULL) {
+ if (hwcap2 & CRYPTO_HWCAP2_PMULL) {
+#if defined(HWCAP2_PMULL)
+ static_assert(HWCAP2_PMULL == CRYPTO_HWCAP2_PMULL,
+ "CRYPTO_HWCAP2 values must match Linux");
+#endif
OPENSSL_armcap_P |= ARMV8_PMULL;
}
- if (hwcap2 & HWCAP2_SHA1) {
+ if (hwcap2 & CRYPTO_HWCAP2_SHA1) {
+#if defined(HWCAP2_SHA1)
+ static_assert(HWCAP2_SHA1 == CRYPTO_HWCAP2_SHA1,
+ "CRYPTO_HWCAP2 values must match Linux");
+#endif
OPENSSL_armcap_P |= ARMV8_SHA1;
}
- if (hwcap2 & HWCAP2_SHA2) {
+ if (hwcap2 & CRYPTO_HWCAP2_SHA2) {
+#if defined(HWCAP2_SHA2)
+ static_assert(HWCAP2_SHA2 == CRYPTO_HWCAP2_SHA2,
+ "CRYPTO_HWCAP2 values must match Linux");
+#endif
OPENSSL_armcap_P |= ARMV8_SHA256;
}
}
diff --git a/src/crypto/cpu_arm_linux.h b/src/crypto/cpu_arm_linux.h
index 895099787439..4b0ecfc77b49 100644
--- a/src/crypto/cpu_arm_linux.h
+++ b/src/crypto/cpu_arm_linux.h
@@ -29,14 +29,16 @@ extern "C" {
// The cpuinfo parser lives in a header file so it may be accessible from
// cross-platform fuzzers without adding code to those platforms normally.
-#define HWCAP_NEON (1 << 12)
+#define CRYPTO_HWCAP_NEON (1 << 12)
// 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)
+// We add the prefix "CRYPTO_" to the definitions so as not to collide with
+// some versions of glibc (>= 2.41) that expose them through <sys/auxv.h>.
+#define CRYPTO_HWCAP2_AES (1 << 0)
+#define CRYPTO_HWCAP2_PMULL (1 << 1)
+#define CRYPTO_HWCAP2_SHA1 (1 << 2)
+#define CRYPTO_HWCAP2_SHA2 (1 << 3)
typedef struct {
const char *data;
@@ -141,16 +143,16 @@ static unsigned long crypto_get_arm_hwcap2_from_cpuinfo(
unsigned long ret = 0;
if (has_list_item(&features, "aes")) {
- ret |= HWCAP2_AES;
+ ret |= CRYPTO_HWCAP2_AES;
}
if (has_list_item(&features, "pmull")) {
- ret |= HWCAP2_PMULL;
+ ret |= CRYPTO_HWCAP2_PMULL;
}
if (has_list_item(&features, "sha1")) {
- ret |= HWCAP2_SHA1;
+ ret |= CRYPTO_HWCAP2_SHA1;
}
if (has_list_item(&features, "sha2")) {
- ret |= HWCAP2_SHA2;
+ ret |= CRYPTO_HWCAP2_SHA2;
}
return ret;
}
diff --git a/src/crypto/cpu_arm_linux_test.cc b/src/crypto/cpu_arm_linux_test.cc
index 0b6b02fbe4d1..cd626a90512e 100644
--- a/src/crypto/cpu_arm_linux_test.cc
+++ b/src/crypto/cpu_arm_linux_test.cc
@@ -93,7 +93,8 @@ TEST(ARMLinuxTest, CPUInfo) {
// (Extra processors omitted.)
"\n"
"Hardware : Qualcomm Technologies, Inc MSM8998\n",
- HWCAP2_AES | HWCAP2_PMULL | HWCAP2_SHA1 | HWCAP2_SHA2,
+ CRYPTO_HWCAP2_AES | CRYPTO_HWCAP2_PMULL | CRYPTO_HWCAP2_SHA1 |
+ CRYPTO_HWCAP2_SHA2,
},
// Garbage should be tolerated.
{
@@ -105,23 +106,24 @@ TEST(ARMLinuxTest, CPUInfo) {
{
"Features : aes pmull sha1 sha2\n"
"CPU architecture: 8\n",
- HWCAP2_AES | HWCAP2_PMULL | HWCAP2_SHA1 | HWCAP2_SHA2,
+ CRYPTO_HWCAP2_AES | CRYPTO_HWCAP2_PMULL | CRYPTO_HWCAP2_SHA1 |
+ CRYPTO_HWCAP2_SHA2,
},
// Various combinations of ARMv8 flags.
{
"Features : aes sha1 sha2\n"
"CPU architecture: 8\n",
- HWCAP2_AES | HWCAP2_SHA1 | HWCAP2_SHA2,
+ CRYPTO_HWCAP2_AES | CRYPTO_HWCAP2_SHA1 | CRYPTO_HWCAP2_SHA2,
},
{
"Features : pmull sha2\n"
"CPU architecture: 8\n",
- HWCAP2_PMULL | HWCAP2_SHA2,
+ CRYPTO_HWCAP2_PMULL | CRYPTO_HWCAP2_SHA2,
},
{
"Features : aes aes aes not_aes aes aes \n"
"CPU architecture: 8\n",
- HWCAP2_AES,
+ CRYPTO_HWCAP2_AES,
},
{
"Features : \n"
@@ -8,12 +8,12 @@ SECTION = "libs"
LICENSE = "OpenSSL & ISC" LICENSE = "OpenSSL & ISC"
LIC_FILES_CHKSUM = "file://LICENSE;md5=2ca501bc96ce9ed0814e2c592c3f9593" LIC_FILES_CHKSUM = "file://LICENSE;md5=2ca501bc96ce9ed0814e2c592c3f9593"
SRC_URI = " \ SRC_URI = "https://deb.debian.org/debian/pool/main/a/android-platform-external-boringssl/android-platform-external-boringssl_${PV}.orig.tar.xz \
https://deb.debian.org/debian/pool/main/a/android-platform-external-boringssl/android-platform-external-boringssl_${PV}.orig.tar.xz \ file://boringssl-go-stub \
file://boringssl-go-stub \ file://boringssl-gtest-stub.cc \
file://boringssl-gtest-stub.cc \ file://0001-cmake-add-SOVERSION-0-to-crypto-and-ssl-shared-libra.patch \
file://0001-cmake-add-SOVERSION-0-to-crypto-and-ssl-shared-libra.patch \ file://0001-Avoid-redefining-constants-introduced-in-glibc-2.41.patch;patchdir=.. \
" "
SRC_URI[md5sum] = "83d24d2f3136ba6a486b5464369b91b4" SRC_URI[md5sum] = "83d24d2f3136ba6a486b5464369b91b4"
SRC_URI[sha256sum] = "f9223e8c15ad5d9e3f1cd50861f4c272658864661e2332bea5d60952aa0930cd" SRC_URI[sha256sum] = "f9223e8c15ad5d9e3f1cd50861f4c272658864661e2332bea5d60952aa0930cd"