[OpenBIOS] [PATCH] forthstrap: avoid unaligned accesses
Aurelien Jarno
aurelien at aurel32.net
Sun Dec 8 11:53:48 CET 2013
Trying to compile OpenBIOS for SPARC32 on a SPARC machine, I get a
SIGBUS within forthstrap, more precisely accessing reloc_table in
load_dictionary. This table is not aligned because the dictionnary
head as a size which is not a multiple of 4.
This is due to the file QEMU,tcx.bin which is being encoded, and which
has a size which is not a multiple of 4. Fix that by adding some padding
after the encoded data.
---
kernel/bootstrap.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/bootstrap.c b/kernel/bootstrap.c
index 546ffee..7f4458e 100644
--- a/kernel/bootstrap.c
+++ b/kernel/bootstrap.c
@@ -1008,6 +1008,7 @@ encode_file( const char *name )
PUSH( pointer2cell(dict + dicthead) );
PUSH( size );
dicthead += size;
+ paddict(sizeof(cell));
}
--
1.8.4.2
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