sparc: Add kgdb support.
Current limitations:
1) On SMP single stepping has some fundamental issues,
shared with other sw single-step architectures such
as mips and arm.
2) On 32-bit sparc we don't support SMP kgdb yet. That
requires some reworking of the IPI mechanisms and
infrastructure on that platform.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/kernel/misctrap.S b/arch/sparc64/kernel/misctrap.S
index b257497..753b4f0 100644
--- a/arch/sparc64/kernel/misctrap.S
+++ b/arch/sparc64/kernel/misctrap.S
@@ -1,3 +1,13 @@
+#ifdef CONFIG_KGDB
+ .globl arch_kgdb_breakpoint
+ .type arch_kgdb_breakpoint,#function
+arch_kgdb_breakpoint:
+ ta 0x72
+ retl
+ nop
+ .size arch_kgdb_breakpoint,.-arch_kgdb_breakpoint
+#endif
+
.type __do_privact,#function
__do_privact:
mov TLB_SFSR, %g3