Changeset dfd735a1 in mainline for kernel/arch/arm32/src/userspace.c

Timestamp:

2010-07-16T11:40:06Z (14 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

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

Children:

24697c3

Parents:

5c16ce7

Message:

Separate ldm(2) from instructions accessing banked registers with NOPs. This is forbidden and was corrupting the link register.

File:

• kernel/arch/arm32/src/userspace.c (modified) (1 diff)

kernel/arch/arm32/src/userspace.c

@@ -98 +98 @@
                 "msr spsr_c, %[user_mode]\n"
                 "ldmfd sp, {r0-r12, sp, lr}^\n"
+                "nop\n"         /* Cannot access sp immediately after ldm(2) */
                 "add sp, sp, #(15*4)\n"
                 "ldmfd sp!, {pc}^\n"