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| author | Michael Brown | 2024-03-27 15:28:47 +0100 |
|---|---|---|
| committer | Michael Brown | 2024-03-27 15:28:47 +0100 |
| commit | 37850e0e854292d074c2d35d18d7bb78d8e6ff85 (patch) | |
| tree | 39b0581719832b892a925706be0af3cbf6768137 /src/include/ipxe/gcm.h | |
| parent | [efi] Extract basic network settings from loaded image device path (diff) | |
| download | ipxe-37850e0e854292d074c2d35d18d7bb78d8e6ff85.tar.gz ipxe-37850e0e854292d074c2d35d18d7bb78d8e6ff85.tar.xz ipxe-37850e0e854292d074c2d35d18d7bb78d8e6ff85.zip | |
[build] Fix build failures with random versions of gcc
For unknown reasons, miscellaneous versions of gcc seem to struggle
with the static assertions used to ensure the correct layout of the
GCM structures.
Adjust the assertions to use offsetof() rather than direct pointer
comparison, on the basis that offsetof() must be a compile-time
constant value.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/gcm.h')
| -rw-r--r-- | src/include/ipxe/gcm.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/src/include/ipxe/gcm.h b/src/include/ipxe/gcm.h index 4864445d..2c785a97 100644 --- a/src/include/ipxe/gcm.h +++ b/src/include/ipxe/gcm.h @@ -89,10 +89,9 @@ static int _gcm_name ## _setkey ( void *ctx, const void *key, \ size_t keylen ) { \ struct _gcm_name ## _context *context = ctx; \ build_assert ( _blocksize == sizeof ( context->gcm.key ) ); \ - build_assert ( ( ( void * ) &context->gcm ) == \ - ( ( void * ) context ) ); \ - build_assert ( ( ( void * ) &context->raw ) == \ - ( ( void * ) context->gcm.raw_ctx ) ); \ + build_assert ( offsetof ( typeof ( *context ), gcm ) == 0 ); \ + build_assert ( offsetof ( typeof ( *context ), raw ) == \ + offsetof ( typeof ( *context ), gcm.raw_ctx ) ); \ return gcm_setkey ( &context->gcm, key, keylen, &_raw_cipher ); \ } \ static void _gcm_name ## _setiv ( void *ctx, const void *iv, \ |