Changeset bac86377 in mainline

Timestamp:

2010-01-08T20:13:42Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

4290746

Parents:

8fb47ec0

Message:

Put sentinels to beginnings of all ia32 kernel stacks to stop
potential stack traces.

Location:

kernel/arch/ia32

Files:

• include/context.h (modified) (1 diff)
• src/boot/boot.S (modified) (1 diff)
• src/smp/ap.S (modified) (1 diff)

kernel/arch/ia32/include/context.h

@@ -49 +49 @@
 #define SP_DELTA        (8 + STACK_ITEM_SIZE)
 
+#define context_set(c, _pc, stack, size) \
+        do { \
+                (c)->pc = (uintptr_t) (_pc); \
+                (c)->sp = ((uintptr_t) (stack)) + (size) - SP_DELTA; \
+                (c)->ebp = 0; \
+        } while (0)
+
 #endif /* KERNEL */
 

kernel/arch/ia32/src/boot/boot.S

@@ -94 +94 @@
         pushl grub_eax
         call arch_pre_main
+
+        # Create the first stack frame
+        pushl $0
+        movl %esp, %ebp
         
         call main_bsp

kernel/arch/ia32/src/smp/ap.S

@@ -78 +78 @@
         addl $0x80000000, %esp                  # PA2KA(ctx.sp)
         
+        pushl $0                                # create the first stack frame
+        movl %esp, %ebp
+
         jmpl $KTEXT, $main_ap