xv6

commit d6cd7d0804c774ddafed204f577e274ad6d81aa3
parent 745e73cd3da656b9f115abb1b92df3aa8ef88e98
Author: Austin Clements <amdragon@mit.edu>
Date:   Sat, 24 Oct 2009 21:31:08 -0400

Merge branch 'master' of git+ssh://am.lcs/home/am0/6.828/xv6

Diffstat:
M
proc.h
 | 
4
+++-

1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/proc.h b/proc.h
@@ -15,7 +15,9 @@
 // x86 convention is that the caller has saved them.
 // Contexts are stored at the bottom of the stack they
 // describe; the stack pointer is the address of the context.
-// The layout of the context must match the code in swtch.S.
+// The layout of the context matches the layout of the stack in swtch.S
+// at "Switch stacks" comment. Switch itself doesn't save eip explicitly,
+// but it is on the stack and allocproc() manipulates it.
 struct context {
   uint edi;
   uint esi;