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| author | jkeil <jkeil@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-09-06 13:31:33 +0000 |
|---|---|---|
| committer | jkeil <jkeil@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2002-09-06 13:31:33 +0000 |
| commit | 11d695ebbfcc8530525ca58e2e943a096da8796f (patch) | |
| tree | 8331b7c15228cf83474803b2fd477daa59fb631b /libmpdemux | |
| parent | 512563bca0218eddb36e8ff976692c94ed8fd1f6 (diff) | |
| download | mpv-11d695ebbfcc8530525ca58e2e943a096da8796f.tar.bz2 mpv-11d695ebbfcc8530525ca58e2e943a096da8796f.tar.xz | |
SPARC gcc generates bad code accessing an unaligned and packed structure member
(See gcc problem report PR c/7847); mplayer crashes with SIGBUS signal.
Added a workaround: copy the unaligned stucture member to a temporary local
variable using memcpy, and use that in the code.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7297 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpdemux')
| -rw-r--r-- | libmpdemux/open.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libmpdemux/open.c b/libmpdemux/open.c index 6d4473ca46..5b3bf25d14 100644 --- a/libmpdemux/open.c +++ b/libmpdemux/open.c @@ -654,8 +654,23 @@ read_next: if(d->angle_seek){ int i,skip=0; +#if defined(__GNUC__) && defined(__sparc__) + // workaround for a bug in the sparc version of gcc 2.95.X ... 3.2, + // it generates incorrect code for unaligned access to a packed + // structure member, resulting in an mplayer crash with a SIGBUS + // signal. + // + // See also gcc problem report PR c/7847: + // http://gcc.gnu.org/cgi-bin/gnatsweb.pl?database=gcc&cmd=view+audit-trail&pr=7847 + for(i=0;i<9;i++){ // check if all values zero: + typeof(d->dsi_pack.sml_agli.data[i].address) tmp_addr; + memcpy(&tmp_addr,&d->dsi_pack.sml_agli.data[i].address,sizeof(tmp_addr)); + if((skip=tmp_addr)!=0) break; + } +#else for(i=0;i<9;i++) // check if all values zero: if((skip=d->dsi_pack.sml_agli.data[i].address)!=0) break; +#endif if(skip){ // sml_agli table has valid data (at least one non-zero): d->cur_pack=d->dsi_pack.dsi_gi.nv_pck_lbn+ |