sparc32: drop hardcoding trap_level in kgdb_trap

Fix this so we pass the trap_level from the actual trap
code like we do in sparc64.
Add use on ENTRY(), ENDPROC() in the assembler function too.

This fixes a bug where the hardcoded value for trap_level
was the sparc64 value.

As the generic code does not use the trap_level argument
(for sparc32) - this patch does not have any functional impact.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/arch/sparc/include/asm/head_32.h b/arch/sparc/include/asm/head_32.h
index 5f1dbe3..6fc60fd 100644 (file)
--- a/arch/sparc/include/asm/head_32.h
+++ b/arch/sparc/include/asm/head_32.h
@@ -43,10 +43,10 @@
        nop;
 
 #ifdef CONFIG_KGDB
-#define KGDB_TRAP(num) \
-       b kgdb_trap_low; \
-       rd %psr,%l0; \
-       nop; \
+#define KGDB_TRAP(num)                  \
+       mov num, %l7;                   \
+       b kgdb_trap_low;                \
+       rd %psr,%l0;                    \
        nop;
 #else
 #define KGDB_TRAP(num) \

diff --git a/arch/sparc/include/asm/kgdb.h b/arch/sparc/include/asm/kgdb.h
index 47366af..a6ad7bf 100644 (file)
--- a/arch/sparc/include/asm/kgdb.h
+++ b/arch/sparc/include/asm/kgdb.h
@@ -28,10 +28,10 @@ enum regnames {
 #define NUMREGBYTES            ((GDB_CSR + 1) * 4)
 #else
 #define NUMREGBYTES            ((GDB_Y + 1) * 8)
+#endif
 
 struct pt_regs;
 asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs);
-#endif
 
 void arch_kgdb_breakpoint(void);
 

diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index 51aa6e8..07918ab 100644 (file)
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -1225,20 +1225,18 @@ breakpoint_trap:
        RESTORE_ALL
 
 #ifdef CONFIG_KGDB
-       .align  4
-       .globl  kgdb_trap_low
-       .type   kgdb_trap_low,#function
-kgdb_trap_low:
+       ENTRY(kgdb_trap_low)
        rd      %wim,%l3
        SAVE_ALL
        wr      %l0, PSR_ET, %psr
        WRITE_PAUSE
 
+       mov     %l7, %o0                ! trap_level
        call    kgdb_trap
-        add    %sp, STACKFRAME_SZ, %o0
+        add    %sp, STACKFRAME_SZ, %o1 ! struct pt_regs *regs
 
        RESTORE_ALL
-       .size   kgdb_trap_low,.-kgdb_trap_low
+       ENDPROC(kgdb_trap_low)
 #endif
 
        .align  4

diff --git a/arch/sparc/kernel/kgdb_32.c b/arch/sparc/kernel/kgdb_32.c
index dcf2108..5d0a323 100644 (file)
--- a/arch/sparc/kernel/kgdb_32.c
+++ b/arch/sparc/kernel/kgdb_32.c
@@ -135,19 +135,19 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 
 extern void do_hw_interrupt(struct pt_regs *regs, unsigned long type);
 
-asmlinkage void kgdb_trap(struct pt_regs *regs)
+asmlinkage void kgdb_trap(unsigned long trap_level, struct pt_regs *regs)
 {
        unsigned long flags;
 
        if (user_mode(regs)) {
-               do_hw_interrupt(regs, 0xfd);
+               do_hw_interrupt(regs, trap_level);
                return;
        }
 
        flushw_all();
 
        local_irq_save(flags);
-       kgdb_handle_exception(0x172, SIGTRAP, 0, regs);
+       kgdb_handle_exception(trap_level, SIGTRAP, 0, regs);
        local_irq_restore(flags);
 }