diff options
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.patch | 78 |
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) |