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| author | rsc <rsc> | 2007-09-27 19:39:10 +0000 |
|---|---|---|
| committer | rsc <rsc> | 2007-09-27 19:39:10 +0000 |
| commit | 39c3fb1b157927058f24b72d43be6f15c1d422b7 (patch) | |
| tree | f02c00516eebdedd22e0ba59a2011c29398a5fc9 /swtch.S | |
| parent | 8c8b748a2f0f10188c1a58c529239fff3a3b1b01 (diff) | |
| download | xv6-labs-39c3fb1b157927058f24b72d43be6f15c1d422b7.tar.gz xv6-labs-39c3fb1b157927058f24b72d43be6f15c1d422b7.tar.bz2 xv6-labs-39c3fb1b157927058f24b72d43be6f15c1d422b7.zip | |
overkill: use segments to catch stack overflow (delete before next year)
Diffstat (limited to 'swtch.S')
| -rw-r--r-- | swtch.S | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -16,10 +16,14 @@ swtch: movl %esi, 20(%eax) movl %edi, 24(%eax) movl %ebp, 28(%eax) + movl %ss, %ebx + movl %ebx, 32(%eax) # Load new registers movl 4(%esp), %eax # not 8(%esp) - popped return address above + movl 32(%eax), %ebx + movl %ebx, %ss movl 28(%eax), %ebp movl 24(%eax), %edi movl 20(%eax), %esi |