s390/bpf,jit: BPF Just In Time compiler for s390

The s390 implementation of the JIT compiler for packet filter speedup.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index 619c5d350726..84fd7e920bfe 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -1601,3 +1601,26 @@ void show_code(struct pt_regs *regs)
         }
         printk("\n");
 }
+
+void print_fn_code(unsigned char *code, unsigned long len)
+{
+        char buffer[64], *ptr;
+        int opsize, i;
+
+        while (len) {
+                ptr = buffer;
+                opsize = insn_length(*code);
+                ptr += sprintf(ptr, "%p: ", code);
+                for (i = 0; i < opsize; i++)
+                        ptr += sprintf(ptr, "%02x", code[i]);
+                *ptr++ = '\t';
+                if (i < 4)
+                        *ptr++ = '\t';
+                ptr += print_insn(ptr, code, (unsigned long) code);
+                *ptr++ = '\n';
+                *ptr++ = 0;
+                printk(buffer);
+                code += opsize;
+                len -= opsize;
+        }
+}