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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-09-08 01:01:14 -0300
commite5fd91f1ef340da553f7a79da9540c3db711c937 (patch)
treeb11842027dc6641da63f4bcc524f8678263304a3 /arch/s390/net/bpf_jit.h
parent2a9b0348e685a63d97486f6749622b61e9e3292f (diff)
Linux-libre 4.2-gnu
Diffstat (limited to 'arch/s390/net/bpf_jit.h')
-rw-r--r--arch/s390/net/bpf_jit.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/arch/s390/net/bpf_jit.h b/arch/s390/net/bpf_jit.h
index de156ba3b..f6498eec9 100644
--- a/arch/s390/net/bpf_jit.h
+++ b/arch/s390/net/bpf_jit.h
@@ -28,6 +28,9 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[];
* | old backchain | |
* +---------------+ |
* | r15 - r6 | |
+ * +---------------+ |
+ * | 4 byte align | |
+ * | tail_call_cnt | |
* BFP -> +===============+ |
* | | |
* | BPF stack | |
@@ -46,14 +49,17 @@ extern u8 sk_load_word[], sk_load_half[], sk_load_byte[];
* R15 -> +---------------+ + low
*
* We get 160 bytes stack space from calling function, but only use
- * 11 * 8 byte (old backchain + r15 - r6) for storing registers.
+ * 12 * 8 byte for old backchain, r15..r6, and tail_call_cnt.
*/
#define STK_SPACE (MAX_BPF_STACK + 8 + 4 + 4 + 160)
-#define STK_160_UNUSED (160 - 11 * 8)
+#define STK_160_UNUSED (160 - 12 * 8)
#define STK_OFF (STK_SPACE - STK_160_UNUSED)
#define STK_OFF_TMP 160 /* Offset of tmp buffer on stack */
#define STK_OFF_HLEN 168 /* Offset of SKB header length on stack */
+#define STK_OFF_R6 (160 - 11 * 8) /* Offset of r6 on stack */
+#define STK_OFF_TCCNT (160 - 12 * 8) /* Offset of tail_call_cnt on stack */
+
/* Offset to skip condition code check */
#define OFF_OK 4