Commit 09faafec authored by Alexey Brodkin's avatar Alexey Brodkin Committed by Thomas Petazzoni
Browse files

uclibc: arc-2015.06 - add patches on top of release 

This commit adds 2 patches on top of arc-2015.06 release:
 0001-nptl-remove-duplicate-vfork-in-libpthread.patch
 0002-ARCv2-update-memset-so-it-could-be-used-without-doub.patch

The first patch fixes multiple build issues when using static build like
http://autobuild.buildroot.net/results/b704016acfa38e7998739a2c70bcf6020c59bda8/



The second patch allows for building uClibc for ARCv2 based CPUs that
doesn't have 64-bit load/store capabilities.

Both patches should be a part of the next release/update of ARC GNU
tools so then they should be removed from Buildroot.

Signed-off-by: default avatarAlexey Brodkin <abrodkin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent dda47868

package/uclibc/arc-2015.06/0001-nptl-remove-duplicate-vfork-in-libpthread.patch

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+722 −0

File added.

Preview size limit exceeded, changes collapsed.

package/uclibc/arc-2015.06/0002-ARCv2-update-memset-so-it-could-be-used-without-doub.patch

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+81 −0
Original line number Diff line number Diff line 
From 9b79d39b027f0a44215c4c13f7fd23b710727c37 Mon Sep 17 00:00:00 2001

From: Alexey Brodkin <abrodkin@synopsys.com>

Date: Thu, 16 Jul 2015 11:38:29 +0300

Subject: [PATCH] ARCv2: update memset() so it could be used without double

 load/stores



Existing version of memset() relies on existence of 64-bit load/stores.

While ARC HS38 may not have those instructions implemented in SoC.



Proposed implementation checks if "-mno-ll64" option was passed to gcc

(for ARCv2 "-mll64" is set implicitly by default) by checking __LL64__

definition and if it is not defined uses 32-bit load/stores.



Signed-off-by: Claudiu Zissulescu <claziss@synopsys.com>

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: Vineet Gupta <vgupta@synopsys.com>

---

 libc/string/arc/arcv2/memset.S | 30 ++++++++++++++++++++++++++++++

 1 file changed, 30 insertions(+)



diff --git a/libc/string/arc/arcv2/memset.S b/libc/string/arc/arcv2/memset.S

index d076ad1..0918d37 100644

--- a/libc/string/arc/arcv2/memset.S

+++ b/libc/string/arc/arcv2/memset.S

@@ -52,6 +52,7 @@ ENTRY(memset)

 	lpnz	@.Lset64bytes

 	;; LOOP START

 	PREWRITE(r3, 64)	;Prefetch the next write location

+#ifdef __LL64__

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

@@ -60,16 +61,45 @@ ENTRY(memset)

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

+#else

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+#endif

 .Lset64bytes:

 

 	lsr.f	lp_count, r2, 5 ;Last remaining  max 124 bytes

 	lpnz	.Lset32bytes

 	;; LOOP START

 	prefetchw [r3, 32]	;Prefetch the next write location

+#ifdef __LL64__

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

 	std.ab	r4, [r3, 8]

+#else

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+	st.ab	r4, [r3, 4]

+#endif

 .Lset32bytes:

 

 	and.f	lp_count, r2, 0x1F ;Last remaining 31 bytes

-- 

2.4.3