aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/patches-3.3/002-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/patches-3.3/002-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch')
-rw-r--r--target/linux/generic/patches-3.3/002-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch78
1 files changed, 0 insertions, 78 deletions
diff --git a/target/linux/generic/patches-3.3/002-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch b/target/linux/generic/patches-3.3/002-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch
deleted file mode 100644
index 266e507e69..0000000000
--- a/target/linux/generic/patches-3.3/002-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch
+++ /dev/null
@@ -1,78 +0,0 @@
-From 418df63adac56841ef6b0f1fcf435bc64d4ed177 Mon Sep 17 00:00:00 2001
-From: Nicolas Pitre <nicolas.pitre@linaro.org>
-Date: Tue, 12 Mar 2013 13:00:42 +0100
-Subject: [PATCH] ARM: 7670/1: fix the memset fix
-
-Commit 455bd4c430b0 ("ARM: 7668/1: fix memset-related crashes caused by
-recent GCC (4.7.2) optimizations") attempted to fix a compliance issue
-with the memset return value. However the memset itself became broken
-by that patch for misaligned pointers.
-
-This fixes the above by branching over the entry code from the
-misaligned fixup code to avoid reloading the original pointer.
-
-Also, because the function entry alignment is wrong in the Thumb mode
-compilation, that fixup code is moved to the end.
-
-While at it, the entry instructions are slightly reworked to help dual
-issue pipelines.
-
-Signed-off-by: Nicolas Pitre <nico@linaro.org>
-Tested-by: Alexander Holler <holler@ahsoftware.de>
-Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
----
- arch/arm/lib/memset.S | 33 +++++++++++++--------------------
- 1 file changed, 13 insertions(+), 20 deletions(-)
-
---- a/arch/arm/lib/memset.S
-+++ b/arch/arm/lib/memset.S
-@@ -14,31 +14,15 @@
-
- .text
- .align 5
-- .word 0
--
--1: subs r2, r2, #4 @ 1 do we have enough
-- blt 5f @ 1 bytes to align with?
-- cmp r3, #2 @ 1
-- strltb r1, [ip], #1 @ 1
-- strleb r1, [ip], #1 @ 1
-- strb r1, [ip], #1 @ 1
-- add r2, r2, r3 @ 1 (r2 = r2 - (4 - r3))
--/*
-- * The pointer is now aligned and the length is adjusted. Try doing the
-- * memset again.
-- */
-
- ENTRY(memset)
--/*
-- * Preserve the contents of r0 for the return value.
-- */
-- mov ip, r0
-- ands r3, ip, #3 @ 1 unaligned?
-- bne 1b @ 1
-+ ands r3, r0, #3 @ 1 unaligned?
-+ mov ip, r0 @ preserve r0 as return value
-+ bne 6f @ 1
- /*
- * we know that the pointer in ip is aligned to a word boundary.
- */
-- orr r1, r1, r1, lsl #8
-+1: orr r1, r1, r1, lsl #8
- orr r1, r1, r1, lsl #16
- mov r3, r1
- cmp r2, #16
-@@ -127,4 +111,13 @@ ENTRY(memset)
- tst r2, #1
- strneb r1, [ip], #1
- mov pc, lr
-+
-+6: subs r2, r2, #4 @ 1 do we have enough
-+ blt 5b @ 1 bytes to align with?
-+ cmp r3, #2 @ 1
-+ strltb r1, [ip], #1 @ 1
-+ strleb r1, [ip], #1 @ 1
-+ strb r1, [ip], #1 @ 1
-+ add r2, r2, r3 @ 1 (r2 = r2 - (4 - r3))
-+ b 1b
- ENDPROC(memset)