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Direction flag

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- ack assumes that the direction flag in eflags is clear when
  assigning two structures. It is implemented by a call to a built-in
  function which is like memcpy but needs the flag to be clear
  otherwise rubish is copied. This patch fixes the kernel entries.
This commit is contained in:
Tomas Hruby 2010-03-26 12:29:52 +00:00
parent a16308efdb
commit 1dd6f5573a
2 changed files with 3 additions and 3 deletions
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3
kernel/arch/i386/mpx386.S
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@ -472,9 +472,6 @@ exception_entry:
TEST_INT_IN_KERNEL(12, exception_entry_nested) TEST_INT_IN_KERNEL(12, exception_entry_nested)
exception_entry_from_user: exception_entry_from_user:
cld
SAVE_PROCESS_CTX(8) SAVE_PROCESS_CTX(8)
/* stop user process cycles */ /* stop user process cycles */

3
kernel/arch/i386/sconst.h
View File

@ -121,6 +121,9 @@
* value on the stack - error code and the exception number * value on the stack - error code and the exception number
*/ */
#define SAVE_PROCESS_CTX_NON_LAZY(displ) \ #define SAVE_PROCESS_CTX_NON_LAZY(displ) \
\
cld /* set the direction flag to a known state */ ;\
\
push %ebp ;\ push %ebp ;\
;\ ;\
movl (CURR_PROC_PTR + 4 + displ)(%esp), %ebp ;\ movl (CURR_PROC_PTR + 4 + displ)(%esp), %ebp ;\