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| 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 /c/src/lib/libbsp/i386/pc386/start/start.s | |
| 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.
Diffstat (limited to '')
| -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 |