[PATCH 2/8] UML - Define jmpbuf access constants

[Jeff Dike <jdike@addtoit.com>]

With newer libcs, the JB_* macros (which we shouldn't be using anyway, 
probably) go away.  This patch defines them if setjmp.h doesn't.  It'd
be nice to have a real way to do this, as sysrq-t requires a way to
get registers from out-of-context threads, which we store in jmpbufs.

Signed-off-by: Jeff Dike <jdike@addtoit.com>

Index: linux-2.6.15/arch/um/os-Linux/sys-i386/registers.c
===================================================================
--- linux-2.6.15.orig/arch/um/os-Linux/sys-i386/registers.c	2005-10-28 12:58:12.000000000 -0400
+++ linux-2.6.15/arch/um/os-Linux/sys-i386/registers.c	2006-02-06 17:34:36.000000000 -0500
@@ -127,6 +127,12 @@ void get_safe_registers(unsigned long *r
 	memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long));
 }
 
+#ifndef JB_PC
+#define JB_PC 5
+#define JB_SP 4
+#define JB_BP 3
+#endif
+
 void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer)
 {
 	struct __jmp_buf_tag *jmpbuf = buffer;
Index: linux-2.6.15/arch/um/os-Linux/sys-x86_64/registers.c
===================================================================
--- linux-2.6.15.orig/arch/um/os-Linux/sys-x86_64/registers.c	2005-10-28 12:58:12.000000000 -0400
+++ linux-2.6.15/arch/um/os-Linux/sys-x86_64/registers.c	2006-02-06 17:34:36.000000000 -0500
@@ -75,6 +75,12 @@ void get_safe_registers(unsigned long *r
 	memcpy(regs, exec_regs, HOST_FRAME_SIZE * sizeof(unsigned long));
 }
 
+#ifndef JB_PC
+#define JB_PC 7
+#define JB_RSP 6
+#define JB_RBP 1
+#endif
+
 void get_thread_regs(union uml_pt_regs *uml_regs, void *buffer)
 {
 	struct __jmp_buf_tag *jmpbuf = buffer;