pfsend segmentation fault on ARM

[mhthdeg]

Hello,

I am running an ARM board (DE1-SoC) and compiled PF_RING in version 6.0.3 on it. While compiling the ../userland/examples I got error messages such as "undefined reference to `pfring_recv' ". I could solve that by editing the Makefile and change this line
LIBS = ${LIBPCAP} ${LIBPFRING} ${LIBPCAP} -lpthread -lrt -lrt
to
LIBS = ${LIBPCAP} ${LIBPFRING} ${LIBPCAP} -lpthread -lpfring -lrt.

Now I receive the following errors (shown below) while compiling. The problem is the static inline ticks getticks(void) function of pfutils.c. I know this function is specified for x68_64 and amd64 architectures but is there also an ARM implementation that you know of? I like to use the pfsend program but if I comment "asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));" out I receive a segmentation fault while running the compiled pfsend. I also found some piece of code that I implemented that doesn`t result in any error but pfsend also shows the segmentation fault.

Has someone an answer to get pfsend working?

static inline ticks getticks(void)
{
u_int32_t r = 0;
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(r) );
return r;
}

./pfsend -i eth0 -n 0

[ 1584.745357] 7fc0: 000762e0 00000014 00008134 00000122 0006d37c 0006d4c8 00000000 0006dc60
[ 1584.753500] 7fe0: bebf6690 bebf6684 0002a8e3 b6f372dc 400d0030 00000003 00000000 00000000
[ 1584.761660] [](ring_sendmsg [pf_ring]) from
[ 1584.770072] from
[ 1584.777448] from
[ 1584.785074] Code: e24cb004 e52de004 e8bd4000 e1a06002 (e5922000)
[ 1584.791188] ---[ end trace 842d2bdb38ad7866 ]---
Segmentation fault

In file included from pfsend.c:44:0:
pfsend.c: In function ‘main’:
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
Makefile:54: recipe for target 'pfsend.o' failed
make: *** [pfsend.o] Error 1

[cardigliano]

Hi
this has been fixed some time ago on github, please git clone the code from there and let us know.

Alfredo

On 15 Sep 2015, at 14:59, mhthdeg notifications@github.com wrote:

Hello,

I am running an ARM board (DE1-SoC) and compiled PF_RING in version 6.0.3 on it. While compiling the ../userland/examples I got error messages such as "undefined reference to `pfring_recv' ". I could solve that by editing the Makefile and change this line
LIBS = ${LIBPCAP} ${LIBPFRING} ${LIBPCAP} -lpthread -lrt -lrt
to
LIBS = ${LIBPCAP} ${LIBPFRING} ${LIBPCAP} -lpthread -lpfring -lrt.

Now I receive the following errors (shown below) while compiling. The problem is the static inline ticks getticks(void) function of pfutils.c. I know this function is specified for x68_64 and amd64 architectures but is there also an ARM implementation that you know of? I like to use the pfsend program but if I comment "asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));" out I receive a segmentation fault while running the compiled pfsend. I also found some piece of code that I implemented that doesn`t result in any error but pfsend also shows the segmentation fault.

Has someone an answer to get pfsend working?

static inline ticks getticks(void)
{

u_int32_t r = 0;
asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(r) );
return r;
}

./pfsend -i eth0 -n 0

[ 1584.745357] 7fc0: 000762e0 00000014 00008134 00000122 0006d37c 0006d4c8 00000000 0006dc60
[ 1584.753500] 7fe0: bebf6690 bebf6684 0002a8e3 b6f372dc 400d0030 00000003 00000000 00000000
[ 1584.761660] x-msg://221/ring_sendmsg%20%5Bpf_ring%5Dfrom x-msg://221/sock_sendmsg+0x24/0x34
[ 1584.770072] x-msg://221/sock_sendmsgfrom x-msg://221/SyS_sendto+0xc8/0xf0
[ 1584.777448] x-msg://221/SyS_sendtofrom x-msg://221/ret_fast_syscall+0x0/0x3c
[ 1584.785074] Code: e24cb004 e52de004 e8bd4000 e1a06002 (e5922000)
[ 1584.791188] ---[ end trace 842d2bdb38ad7866 ]---
Segmentation fault

In file included from pfsend.c:44:0:
pfsend.c: In function ‘main’:
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
pfutils.c:266:3: error: impossible constraint in ‘asm’
asm volatile ("rdtsc" : "=a"(lo), "=d"(hi));
^
Makefile:54: recipe for target 'pfsend.o' failed
make: *** [pfsend.o] Error 1

—
Reply to this email directly or view it on GitHub #39.

[mhthdeg]

Hi,
thank you for your response. I git cloned the code and compiled it and no error occured. Thanks for that. Unfortunately I still get an error while using an example program that sends via pf_ring. I tried the pfbridge example to forward the packets from eth0 to eth1 and the pfsend example on interface eth0 and still get the following error messages:

pfbridge program

---

0 pps
0 pps
0 pps
[ 1223.791080] Unable to handle kernel NULL pointer dereference at virtual address 0000003c
[ 1223.799254] pgd = e380c000
[ 1223.801990] [0000003c] *pgd=22ea6831, *pte=00000000, *ppte=00000000
[ 1223.808273] Internal error: Oops: 17 [#2] SMP ARM
[ 1223.812957] Modules linked in: pf_ring(O)
[ 1223.816979] CPU: 0 PID: 5245 Comm: pfbridge Tainted: G D O 4.1.0-00150-g60fd5d4 #1
[ 1223.825464] Hardware name: Altera SOCFPGA
[ 1223.829457] task: eeed5300 ti: eee8a000 task.ti: eee8a000
[ 1223.834847] PC is at ring_sendmsg+0x18/0x2e0 [pf_ring]
[ 1223.839969] LR is at sock_sendmsg+0x24/0x34
[ 1223.844136] pc : [] lr : [] psr: 400d0013
[ 1223.844136] sp : eee8be80 ip : eee8beb0 fp : eee8beac
[ 1223.855561] r10: 00000000 r9 : eee8a000 r8 : c000fc24
[ 1223.860763] r7 : 00000122 r6 : 0000003c r5 : 00000000 r4 : 00000000
[ 1223.867260] r3 : bf003f04 r2 : 0000003c r1 : eee8bedc r0 : eebed680
[ 1223.873759] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 1223.880861] Control: 10c5387d Table: 2380c04a DAC: 00000015
[ 1223.886582] Process pfbridge (pid: 5245, stack limit = 0xeee8a218)
[ 1223.892733] Stack: (0xeee8be80 to 0xeee8c000)
[ 1223.897075] be80: bf003f04 00000000 00000000 eebed680 00000122 c000fc24 eee8a000 00000000
[ 1223.905219] bea0: eee8bebc eee8beb0 c0450f40 bf003f10 eee8bfa4 eee8bec0 c0452378 c0450f28
[ 1223.913361] bec0: eee8bee4 00000800 00000000 00000000 00000000 b67a90b8 0000003c eee8bf08
[ 1223.921503] bee0: 00000014 00000001 00000000 0000003c eee8bed4 00000001 00000000 00000000
[ 1223.929646] bf00: 00000000 c012f170 03000011 00000000 00000000 00000000 00000000 eee8bf48
[ 1223.937788] bf20: c000fc24 eee8a000 eee8bf7c eee8bf40 c012f170 c0075d6c c012f144 c007ea18
[ 1223.945931] bf40: 1dcd6500 c000ab20 000004c7 36efb7d6 00000000 00000001 beb0ea64 0000001c
[ 1223.954072] bf60: 00000020 c000fc24 eee8a000 00000000 eee8bfa4 eee8bf80 c01304d8 c012ff70
[ 1223.962214] bf80: 000004c7 36efb7d6 0006b480 0007c604 00000014 00008144 00000000 eee8bfa8
[ 1223.970357] bfa0: c000fa80 c04522bc 0007c604 00000014 00000004 b67a90b8 0000003c 00000000
[ 1223.978501] bfc0: 0007c604 00000014 00008144 00000122 0007c5a2 00000000 b6f95000 00000000
[ 1223.986644] bfe0: beb0eac0 beb0eab4 0001514b b6f652dc 400d0030 00000004 00000000 00000000
[ 1223.994804] [](ring_sendmsg [pf_ring]) from
[ 1224.003213] from
[ 1224.010588] from
[ 1224.018215] Code: e24cb004 e52de004 e8bd4000 e1a06002 (e5922000)
[ 1224.024330] ---[ end trace 68df3e84878b5372 ]---
Segmentation fault

---

pfsend program

---

root@linaro-nano:~/PF_RING/userland/examples# ./pfsend -i eth0
Sending packets on eth0
Using PF_RING v.6.0.3
[ 1309.781569] Unable to handle kernel NULL pointer dereference at virtual address 0000003c
NOT using zero-copy: not supported by this driver
Dumping statistics on /proc/net/pf_ring/stats/5253-eth0.7
[ 1309.791398] pgd = e380c000
[ 1309.803580] [0000003c] *pgd=2348c831, *pte=00000000, *ppte=00000000
[ 1309.809873] Internal error: Oops: 17 [#3] SMP ARM
[ 1309.814556] Modules linked in: pf_ring(O)
[ 1309.818578] CPU: 1 PID: 5253 Comm: pfsend Tainted: G D O 4.1.0-00150-g60fd5d4 #1
[ 1309.826889] Hardware name: Altera SOCFPGA
[ 1309.830882] task: eeed7440 ti: e39f8000 task.ti: e39f8000
[ 1309.836274] PC is at ring_sendmsg+0x18/0x2e0 [pf_ring]
[ 1309.841396] LR is at sock_sendmsg+0x24/0x34
[ 1309.845562] pc : [] lr : [] psr: 400d0013
[ 1309.845562] sp : e39f9e80 ip : e39f9eb0 fp : e39f9eac
[ 1309.856986] r10: 00000000 r9 : e39f8000 r8 : c000fc24
[ 1309.862187] r7 : 00000122 r6 : 0000003c r5 : 00000000 r4 : 00000000
[ 1309.868684] r3 : bf003f04 r2 : 0000003c r1 : e39f9edc r0 : eebed980
[ 1309.875182] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user
[ 1309.882285] Control: 10c5387d Table: 2380c04a DAC: 00000015
[ 1309.888005] Process pfsend (pid: 5253, stack limit = 0xe39f8218)
[ 1309.893984] Stack: (0xe39f9e80 to 0xe39fa000)
[ 1309.898326] 9e80: bf003f04 00000000 00000000 eebed980 00000122 c000fc24 e39f8000 00000000
[ 1309.906469] 9ea0: e39f9ebc e39f9eb0 c0450f40 bf003f10 e39f9fa4 e39f9ec0 c0452378 c0450f28
[ 1309.914613] 9ec0: e39f9ee4 c000fc24 e39f8000 00000000 00000000 00076350 0000003c e39f9f08
[ 1309.922755] 9ee0: 00000014 00000001 00000000 0000003c e39f9ed4 00000001 00000000 00000000
[ 1309.930897] 9f00: 00000000 eed26308 03000011 00000000 00000000 00000000 00000000 00000000
[ 1309.939040] 9f20: 00000000 eee973c0 0000003a eed26308 00000002 eee973c8 e39f8000 00000000
[ 1309.947182] 9f40: e39f9f7c e39f9f50 c011c728 c015a31c 00000000 00000000 e39f9f7c eee973c0
[ 1309.955325] 9f60: eee973c0 beb61178 0000003a c000fc24 e39f9fa4 e39f9f80 c011cf48 c011c610
[ 1309.963467] 9f80: 00000000 00000000 0000003a 000762fc 00000014 00008144 00000000 e39f9fa8
[ 1309.971610] 9fa0: c000fa80 c04522bc 000762fc 00000014 00000003 00076350 0000003c 00000000
[ 1309.979752] 9fc0: 000762fc 00000014 00008144 00000122 0006d4c8 00000000 0006dc60 00000000
[ 1309.987895] 9fe0: beb636d0 beb636c4 0002a783 b6fa02dc 400d0030 00000003 00000000 00000000
[ 1309.996053] [](ring_sendmsg [pf_ring]) from
[ 1310.004462] from
[ 1310.011838] from
[ 1310.019464] Code: e24cb004 e52de004 e8bd4000 e1a06002 (e5922000)
[ 1310.025567] ---[ end trace 68df3e84878b5373 ]---
Segmentation fault

---

Has anyone an idea how to fix this issue?

[cardigliano]

Latest dev pfsend seems to be working on ARM, if you are still able to reproduce this please reopen the issue.