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fix arm32 build errors with GCC 15.3

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It seems that GCC 15.3 has added additional OOB checks for ARCH arm32:

In file included from /home/db/owrt/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mbedtls-3.6.6/library/aes.c:14:
In function 'mbedtls_xor_no_simd',
    inlined from 'mbedtls_aes_crypt_cbc' at /home/db/owrt/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mbedtls-3.6.6/library/aes.c:1119:13:
/home/db/owrt/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mbedtls-3.6.6/library/common.h:343:24: error: array subscript 16 is outside array bounds of 'unsigned char[16]' [-Werror=array-bounds=]
  343 |         r[i] = a[i] ^ b[i];
      |                       ~^~~
/home/db/owrt/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mbedtls-3.6.6/library/aes.c: In function 'mbedtls_aes_crypt_cbc':
/home/db/owrt/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/mbedtls-3.6.6/library/aes.c:1075:41: note: at offset 16 into object 'iv' of size [0, 16]
 1075 |                           unsigned char iv[16],
      |                           ~~~~~~~~~~~~~~^~~~~~

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
This commit is contained in:
Shiji Yang 2026-06-13 22:10:28 +08:00
parent 823f79b88d
commit 826390d509
1 changed files with 2 additions and 1 deletions
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3
library/common.h
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@ -332,7 +332,8 @@ static inline void mbedtls_xor_no_simd(unsigned char *r,
uint32_t x = mbedtls_get_unaligned_uint32(a + i) ^ mbedtls_get_unaligned_uint32(b + i);
mbedtls_put_unaligned_uint32(r + i, x);
}
#if defined(__IAR_SYSTEMS_ICC__)
#if defined(__IAR_SYSTEMS_ICC__) || \
(defined(MBEDTLS_ARCH_IS_ARM32) && defined(MBEDTLS_COMPILER_IS_GCC) && MBEDTLS_GCC_VERSION >= 150300)
if (n % 4 == 0) {
return;
}