* newlib: add thumb2 patches

git-svn-id: https://svn.pengutronix.de/svn/oselas/toolchain/trunks/OSELAS.Toolchain-trunk@7752 f8d472c7-5700-0410-ac5a-87979cec3adf

2 files changed, 97 insertions, 0 deletions

diff --git a/patches/newlib-1.16.0/generic/newlib-1.16.0-thumb2.diff b/patches/newlib-1.16.0/generic/newlib-1.16.0-thumb2.diff
new file mode 100644
index 0000000..cd78c99
--- /dev/null
+++ b/patches/newlib-1.16.0/generic/newlib-1.16.0-thumb2.diff
@@ -0,0 +1,96 @@
+From: Nick Clifton <nickc at redhat dot com>
+To: info dot gnu at rt-labs dot com
+Cc: newlib at sources dot redhat dot com
+Date: Fri, 25 Apr 2008 10:01:35 +0100
+Subject: Re: arm-elf thumb-2 issue in newlib or gas?
+
+[...]
+http://sourceware.org/ml/newlib/2008/msg00222.html
+[...]
+
+OK, well the crt0.S will work if used in User mode, so I am going to check in
+these patches for now. At some point in the future I will look at how we should
+be initializing the interrupt stack pointers.
+
+Cheers
+  Nick
+
+newlib/ChangeLog
+2008-04-25  Nick Clifton  <nickc@redhat.com>
+
+
+* libc/machine/arm/setjmp.S: Fix thumb2 support.
+
+libgloss/ChangeLog
+2008-04-25  Nick Clifton  <nickc@redhat.com>
+
+
+	* arm/crt0.S: Allow assembly under ARMv7 ISA.  Support for
+	initializing stack pointers for interrupt modes is still pending.
+
+---
+ libgloss/arm/crt0.S              |    7 +++++++
+ newlib/libc/machine/arm/setjmp.S |   10 ++++++++++
+ 2 files changed, 17 insertions(+)
+
+Index: newlib-1.16.0/libgloss/arm/crt0.S
+===================================================================
+--- newlib-1.16.0.orig/libgloss/arm/crt0.S
++++ newlib-1.16.0/libgloss/arm/crt0.S
+@@ -82,12 +82,18 @@
+ 
+ 	ldr	r3, .Lstack
+ 	cmp	r3, #0
++#ifdef __thumb2__
++	it	eq
++#endif
+ 	ldreq	r3, .LC0
+ 	/* Note: This 'mov' is essential when starting in User, and ensures we
+ 		 always get *some* sp value for the initial mode, even if we 
+ 		 have somehow missed it below (in which case it gets the same
+ 		 value as FIQ - not ideal, but better than nothing.) */
+ 	mov	sp, r3
++#ifdef __thumb2__
++	/* XXX Fill in stack assignments for interrupt modes.  */
++#else
+ 	mrs	r2, CPSR
+ 	tst	r2, #0x0F	/* Test mode bits - in User of all are 0 */
+ 	beq	.LC23		/* "eq" means r2 AND #0x0F is 0 */
+@@ -119,6 +125,7 @@
+ 	
+ 	orr	r2, r2, #0xC0	/* Back to original mode, presumably SVC, */
+ 	msr	CPSR_c, r2	/* with FIQ/IRQ disable bits forced to 1 */
++#endif
+ .LC23:
+ 	/* Setup a default stack-limit in-case the code has been
+ 	   compiled with "-mapcs-stack-check".  Hard-wiring this value
+Index: newlib-1.16.0/newlib/libc/machine/arm/setjmp.S
+===================================================================
+--- newlib-1.16.0.orig/newlib/libc/machine/arm/setjmp.S
++++ newlib-1.16.0/newlib/libc/machine/arm/setjmp.S
+@@ -120,7 +120,12 @@ SYM (\name):
+ 	FUNC_START setjmp
+ 
+ 	/* Save all the callee-preserved registers into the jump buffer.  */
++#ifdef __thumb2__
++	stmea		a1!, { v1-v7, fp, ip, lr }
++	str		sp, [a1],#+4
++#else
+ 	stmea		a1!, { v1-v7, fp, ip, sp, lr }
++#endif
+ 	
+ #if 0	/* Simulator does not cope with FP instructions yet.  */
+ #ifndef __SOFTFP__
+@@ -142,7 +147,12 @@ SYM (\name):
+ 	/* If we have stack extension code it ought to be handled here.  */
+ 	
+ 	/* Restore the registers, retrieving the state when setjmp() was called.  */
++#ifdef __thumb2__
++	ldmfd		a1!, { v1-v7, fp, ip, lr }
++	ldr		sp, [a1],#+4
++#else
+ 	ldmfd		a1!, { v1-v7, fp, ip, sp, lr }
++#endif
+ 	
+ #if 0	/* Simulator does not cope with FP instructions yet.  */
+ #ifndef __SOFTFP__
diff --git a/patches/newlib-1.16.0/generic/series b/patches/newlib-1.16.0/generic/series
new file mode 100644
index 0000000..c4759fe
--- /dev/null
+++ b/patches/newlib-1.16.0/generic/series
@@ -0,0 +1 @@
+newlib-1.16.0-thumb2.diff