genode/repos/base-okl4/patches/suspend_resume.patch
Norman Feske ca971bbfd8 Move repositories to 'repos/' subdirectory
This patch changes the top-level directory layout as a preparatory
step for improving the tools for managing 3rd-party source codes.
The rationale is described in the issue referenced below.

Issue #1082
2014-05-14 16:08:00 +02:00

29 lines
1.0 KiB
Diff

diff --git a/arch/ia32/pistachio/src/trap.spp b/arch/ia32/pistachio/src/trap.spp
--- a/arch/ia32/pistachio/src/trap.spp
+++ b/arch/ia32/pistachio/src/trap.spp
@@ -142,6 +142,24 @@
PROFILE_KERNEL_TIME_STOP
orl $STACK_TOP, %esp
+
+ /* Determine if there is any work required before returning
+ * back to userspace. */
+
+ /* Get address of current TCB */
+ IA32_GET_CURRENT_TCB %edx
+ /* Add offset of the callback function pointer */
+ addl $(OFS_TCB_POST_SYSCALL_CALLBACK), %edx
+ /* If the callback function pointer is set... */
+ cmpl $0, (%edx)
+ je 1f
+ /* ...call start_post_syscall_callback() */
+ pusha /* %esp = stack_top - 32 */
+ call start_post_syscall_callback /* %esp = stack top */
+ sub $32, %esp /* %esp = stack top - 32 */
+ popa
+ 1:
+
movl (%esp), %edx
addl $(OFS_TCB_ARCH), %edx