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