Avoid setting or recording negative alignments when the target stores multiple octets in a single byte.

gas	* read.c (finish_bundle): Avoid recording a negative alignment.
	(do_align): Use unsigned values for n, len and max.  Only create
	a frag if the alignment requirement is greater than the minimum
	byte alignment.  Avoid recording a negative alignment.
	(s_align): Use unsigned values where appropriate.
	(bss_alloc): Use an unsigned value for the alignment.
	(sizeof_sleb128): Add a comment noting that we encode one octet
	per byte, regardless of the value of OCTETS_PER_BYTE_POWER.
	(emit_leb129_expr): Abort if the emitted encoding was longer than
	expected.
	* read.h (output_leb128): Update prototype.
	(sizeof_leb128): Update prototype.
	(bss_alloc): Update prototype.
	* write.c (record_alignment): Use an unsigned value for the
	alignment.  Do not record alignments less than the minimum
	alignment for a byte.
	* write.h (record_alignment): Update prototype.

1 files changed, 5 insertions, 2 deletions

diff --git a/gas/write.c b/gas/write.c
index f9d5da9..46d8d96 100644
--- a/gas/write.c
+++ b/gas/write.c
@@ -355,12 +355,15 @@ record_alignment (/* Segment to which alignment pertains.  */
 		  segT seg,
 		  /* Alignment, as a power of 2 (e.g., 1 => 2-byte
 		     boundary, 2 => 4-byte boundary, etc.)  */
-		  int align)
+		  unsigned int align)
 {
   if (seg == absolute_section)
     return;
 
-  if ((unsigned int) align > bfd_get_section_alignment (stdoutput, seg))
+  if (align <= OCTETS_PER_BYTE_POWER)
+    return;
+
+  if (align > bfd_get_section_alignment (stdoutput, seg))
     bfd_set_section_alignment (stdoutput, seg, align);
 }