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-rw-r--r--tools/net/bpf_exp.l1
-rw-r--r--tools/net/bpf_exp.y11
-rw-r--r--tools/net/bpf_jit_disasm.c20
3 files changed, 20 insertions, 12 deletions
diff --git a/tools/net/bpf_exp.l b/tools/net/bpf_exp.l
index bf7be77ddd6..833a96611da 100644
--- a/tools/net/bpf_exp.l
+++ b/tools/net/bpf_exp.l
@@ -92,6 +92,7 @@ extern void yyerror(const char *str);
"#"?("cpu") { return K_CPU; }
"#"?("vlan_tci") { return K_VLANT; }
"#"?("vlan_pr") { return K_VLANP; }
+"#"?("rand") { return K_RAND; }
":" { return ':'; }
"," { return ','; }
diff --git a/tools/net/bpf_exp.y b/tools/net/bpf_exp.y
index d15efc989ef..e6306c51c26 100644
--- a/tools/net/bpf_exp.y
+++ b/tools/net/bpf_exp.y
@@ -56,7 +56,7 @@ static void bpf_set_jmp_label(char *label, enum jmp_type type);
%token OP_LDXI
%token K_PKT_LEN K_PROTO K_TYPE K_NLATTR K_NLATTR_NEST K_MARK K_QUEUE K_HATYPE
-%token K_RXHASH K_CPU K_IFIDX K_VLANT K_VLANP K_POFF
+%token K_RXHASH K_CPU K_IFIDX K_VLANT K_VLANP K_POFF K_RAND
%token ':' ',' '[' ']' '(' ')' 'x' 'a' '+' 'M' '*' '&' '#' '%'
@@ -164,6 +164,9 @@ ldb
| OP_LDB K_POFF {
bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PAY_OFFSET); }
+ | OP_LDB K_RAND {
+ bpf_set_curr_instr(BPF_LD | BPF_B | BPF_ABS, 0, 0,
+ SKF_AD_OFF + SKF_AD_RANDOM); }
;
ldh
@@ -212,6 +215,9 @@ ldh
| OP_LDH K_POFF {
bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PAY_OFFSET); }
+ | OP_LDH K_RAND {
+ bpf_set_curr_instr(BPF_LD | BPF_H | BPF_ABS, 0, 0,
+ SKF_AD_OFF + SKF_AD_RANDOM); }
;
ldi
@@ -265,6 +271,9 @@ ld
| OP_LD K_POFF {
bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
SKF_AD_OFF + SKF_AD_PAY_OFFSET); }
+ | OP_LD K_RAND {
+ bpf_set_curr_instr(BPF_LD | BPF_W | BPF_ABS, 0, 0,
+ SKF_AD_OFF + SKF_AD_RANDOM); }
| OP_LD 'M' '[' number ']' {
bpf_set_curr_instr(BPF_LD | BPF_MEM, 0, 0, $4); }
| OP_LD '[' 'x' '+' number ']' {
diff --git a/tools/net/bpf_jit_disasm.c b/tools/net/bpf_jit_disasm.c
index cfe0cdcda3d..c5baf9c591b 100644
--- a/tools/net/bpf_jit_disasm.c
+++ b/tools/net/bpf_jit_disasm.c
@@ -43,8 +43,7 @@ static void get_exec_path(char *tpath, size_t size)
free(path);
}
-static void get_asm_insns(uint8_t *image, size_t len, unsigned long base,
- int opcodes)
+static void get_asm_insns(uint8_t *image, size_t len, int opcodes)
{
int count, i, pc = 0;
char tpath[256];
@@ -107,13 +106,13 @@ static void put_klog_buff(char *buff)
}
static int get_last_jit_image(char *haystack, size_t hlen,
- uint8_t *image, size_t ilen,
- unsigned long *base)
+ uint8_t *image, size_t ilen)
{
char *ptr, *pptr, *tmp;
off_t off = 0;
int ret, flen, proglen, pass, ulen = 0;
regmatch_t pmatch[1];
+ unsigned long base;
regex_t regex;
if (hlen == 0)
@@ -136,7 +135,7 @@ static int get_last_jit_image(char *haystack, size_t hlen,
ptr = haystack + off - (pmatch[0].rm_eo - pmatch[0].rm_so);
ret = sscanf(ptr, "flen=%d proglen=%d pass=%d image=%lx",
- &flen, &proglen, &pass, base);
+ &flen, &proglen, &pass, &base);
if (ret != 4)
return 0;
@@ -162,7 +161,7 @@ static int get_last_jit_image(char *haystack, size_t hlen,
assert(ulen == proglen);
printf("%d bytes emitted from JIT compiler (pass:%d, flen:%d)\n",
proglen, pass, flen);
- printf("%lx + <x>:\n", *base);
+ printf("%lx + <x>:\n", base);
regfree(&regex);
return ulen;
@@ -172,8 +171,7 @@ int main(int argc, char **argv)
{
int len, klen, opcodes = 0;
char *kbuff;
- unsigned long base;
- uint8_t image[4096];
+ static uint8_t image[32768];
if (argc > 1) {
if (!strncmp("-o", argv[argc - 1], 2)) {
@@ -189,9 +187,9 @@ int main(int argc, char **argv)
kbuff = get_klog_buff(&klen);
- len = get_last_jit_image(kbuff, klen, image, sizeof(image), &base);
- if (len > 0 && base > 0)
- get_asm_insns(image, len, base, opcodes);
+ len = get_last_jit_image(kbuff, klen, image, sizeof(image));
+ if (len > 0)
+ get_asm_insns(image, len, opcodes);
put_klog_buff(kbuff);