https://bug385583.bugzilla.mozilla.org/attachment.cgi?id=347009
https://bugzilla.mozilla.org/show_bug.cgi?id=385583

Fix:
NSPR makes incorrect assumptions about jmp_buf on ARM EABI systems

See also:
http://www.mail-archive.com/debian-arm@lists.debian.org/msg06589.html

Index: mozilla/nsprpub/pr/include/md/_linux.h
===================================================================
RCS file: /cvsroot/mozilla/nsprpub/pr/include/md/_linux.h,v
retrieving revision 3.52
diff -u -p -8 -r3.52 _linux.h
--- mozilla/nsprpub/pr/include/md/_linux.h	11 Oct 2008 15:26:22 -0000	3.52
+++ mozilla/nsprpub/pr/include/md/_linux.h	8 Nov 2008 01:22:46 -0000
@@ -412,21 +412,31 @@ extern void _MD_CleanupBeforeExit(void);
 #define _MD_SP_TYPE __ptr_t
 #else
 #error "Linux/MIPS pre-glibc2 not supported yet"
 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
 
 #elif defined(__arm__)
 /* ARM/Linux */
 #if defined(__GLIBC__) && __GLIBC__ >= 2
+#ifdef __ARM_EABI__
+/* EABI */
+#define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[8]
+#define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[7] = (val))
+#define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
+#define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[7])
+#define _MD_SP_TYPE __ptr_t
+#else /* __ARM_EABI__ */
+/* old ABI */
 #define _MD_GET_SP(_t) (_t)->md.context[0].__jmpbuf[20]
 #define _MD_SET_FP(_t, val) ((_t)->md.context[0].__jmpbuf[19] = (val))
 #define _MD_GET_SP_PTR(_t) &(_MD_GET_SP(_t))
 #define _MD_GET_FP_PTR(_t) (&(_t)->md.context[0].__jmpbuf[19])
 #define _MD_SP_TYPE __ptr_t
+#endif /* __ARM_EABI__ */
 #else
 #error "ARM/Linux pre-glibc2 not supported yet"
 #endif /* defined(__GLIBC__) && __GLIBC__ >= 2 */
 
 #else
 
 #error "Unknown CPU architecture"