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[patch] Armv7 libgloss build failure
- From: Paul Brook <paul at codesourcery dot com>
- To: newlib at sources dot redhat dot com
- Date: Fri, 24 Feb 2006 18:33:40 +0000
- Subject: [patch] Armv7 libgloss build failure
Armv7m doesn't implement the cpsr register. The patch below allows building
libgloss/arm/redboot-crt0.S with -march=armv7 (Thumb-2) by using the cps
instruction instead.
Tested with cross to arm-none-eabi.
Ok?
Paul
2006-02-24 Paul Brook <paul@codesourcery.com>
* arm/redboot-crt0.S: Use cps in Thumb-2 mode.
Index: libgloss/arm/redboot-crt0.S
===================================================================
RCS file: /var/cvsroot/src-cvs/src/libgloss/arm/redboot-crt0.S,v
retrieving revision 1.5
diff -u -p -r1.5 redboot-crt0.S
--- libgloss/arm/redboot-crt0.S 7 Feb 2006 18:46:23 -0000 1.5
+++ libgloss/arm/redboot-crt0.S 24 Feb 2006 18:27:09 -0000
@@ -33,9 +33,13 @@
mov r7, #0 /* Null frame pointer for Thumb. */
/* Enable interrupts for gdb debugging. */
+#ifdef __thumb2__
+ cpsie if
+#else
mrs r0, cpsr
bic r0, r0, #0xC0
msr cpsr, r0
+#endif
mov a2, #0 /* Second arg: fill value. */
ldr a1, .LC1 /* First arg: start of memory block. */