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Subject[PATCH 2.6.17-rc6 6/8] Add kmemleak support for ARM
Date
From: Catalin Marinas <catalin.marinas@arm.com>

This patch modifies the vmlinux.lds.S script and adds the backtrace support
for ARM to be used with kmemleak.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm/kernel/vmlinux.lds.S | 7 +++++++
include/asm-arm/processor.h | 12 ++++++++++++
2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/arch/arm/kernel/vmlinux.lds.S b/arch/arm/kernel/vmlinux.lds.S
index 2b254e8..c6f038c 100644
--- a/arch/arm/kernel/vmlinux.lds.S
+++ b/arch/arm/kernel/vmlinux.lds.S
@@ -68,6 +68,11 @@ #endif
__per_cpu_start = .;
*(.data.percpu)
__per_cpu_end = .;
+#ifdef CONFIG_DEBUG_MEMLEAK
+ __memleak_offsets_start = .;
+ *(.init.memleak_offsets)
+ __memleak_offsets_end = .;
+#endif
#ifndef CONFIG_XIP_KERNEL
__init_begin = _stext;
*(.init.data)
@@ -110,6 +115,7 @@ #endif

.data : AT(__data_loc) {
__data_start = .; /* address in memory */
+ _sdata = .;

/*
* first, the init task union, aligned
@@ -158,6 +164,7 @@ #endif
__bss_start = .; /* BSS */
*(.bss)
*(COMMON)
+ __bss_stop = .;
_end = .;
}
/* Stabs debugging sections. */
diff --git a/include/asm-arm/processor.h b/include/asm-arm/processor.h
index 04f4d34..feaf017 100644
--- a/include/asm-arm/processor.h
+++ b/include/asm-arm/processor.h
@@ -121,6 +121,18 @@ #define spin_lock_prefetch(x) do { } whi

#endif

+#ifdef CONFIG_FRAME_POINTER
+static inline unsigned long arch_call_address(void *frame)
+{
+ return *(unsigned long *) (frame - 4) - 4;
+}
+
+static inline void *arch_prev_frame(void *frame)
+{
+ return *(void **) (frame - 12);
+}
+#endif
+
#endif

#endif /* __ASM_ARM_PROCESSOR_H */
-
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