diff options
| author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-02-06 13:47:09 +0000 |
|---|---|---|
| committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1998-02-06 13:47:09 +0000 |
| commit | f02ffcaa6a28b7d1a80e6665ab7d3eba37ff243e (patch) | |
| tree | 91f77f7dac07190a87d369d35356508312a505cd | |
| parent | Added code to more correctly process abstract types (handle, range, etc). (diff) | |
| download | rtems-f02ffcaa6a28b7d1a80e6665ab7d3eba37ff243e.tar.bz2 | |
Problem report from Brian Cuthie regarding incorrect calculation
of BSS size. The conversion from a count of u8's to a count of
u32's was shifting in the wrong direction. This error had been in
the start code a long time. It had not caused problems because
the BSS is typically much smaller than the C heap which typically
follows it in memory. Plus since this code was executed at start
time, all that really happened was an extra zeroing of some memory.
| -rw-r--r-- | c/src/lib/libbsp/i386/pc386/start/start.s | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/start/start.s b/c/src/lib/libbsp/i386/pc386/start/start.s index bdf74731c6..0c44cd9e36 100644 --- a/c/src/lib/libbsp/i386/pc386/start/start.s +++ b/c/src/lib/libbsp/i386/pc386/start/start.s @@ -165,7 +165,8 @@ SYM (zero_bss): movl $ SYM (_end), ecx # find end of .bss movl $ SYM (_bss_start), edi # edi = beginning of .bss subl edi, ecx # ecx = size of .bss in bytes - shll ecx # size of .bss in longs + shrl ecx # size of .bss in longs + shrl ecx xorl eax, eax # value to clear out memory repne # while ecx != 0 stosl # clear a long in the bss |