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feat: add arm support #7

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9 changes: 9 additions & 0 deletions arm/Makefile
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Original file line number Diff line number Diff line change
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CFLAGS= -g
CC=arm-linux-gnueabi-gcc
all : driver

OBJS= aflCall.o driver.o parse.o sysc.o argfd.o
driver: $(OBJS)
$(CC) $(CFLAGS) -static -o $@ $(OBJS)
clean:
rm -f $(OBJS) $(HOBJS) driver
101 changes: 101 additions & 0 deletions arm/aflCall.c
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/*
* AFL hypercalls
*
* Compile with -DTEST to take inputs from stdin without using hypercalls.
*/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/mman.h>
#include "drv.h"

int aflTestMode = 0;

#define SZ 4096
static u_long bufsz;
static char *buf;
static u_int32_t *arr;

static void
aflInit(void)
{
static int aflInit = 0;
char *pg;

if(aflInit)
return;

pg = mmap(NULL, SZ, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS | MAP_LOCKED, -1, 0);
if(pg == (void*)-1) {
perror("mmap");
exit(1);
}
memset(pg, 0, SZ); // touch all the bits!

arr = (u_int32_t *)pg;
buf = pg + 4 * sizeof arr[0];
bufsz = SZ - 4 * sizeof arr[0];

aflInit = 1;
}

static inline u_long
aflCall(u_long a0, u_long a1, u_long a2)
{
u_long ret;
register long r0 asm ("r0") = a0;
register long r1 asm ("r1") = a1;
register long r2 asm ("r2") = a2;
asm("swi 0x4c4641" //we saw this in the Samsung Emulator too!
: "=r"(r0)
: "r"(r0), "r"(r1), "r"(r2)
);
ret = (u_long)r0;
return ret;
}

int
startForkserver(int ticks)
{
aflInit();
if(aflTestMode)
return 0;
return aflCall(1, ticks, 0);
}

char *
getWork(u_long *sizep)
{
aflInit();
if(aflTestMode)
*sizep = read(0, buf, bufsz);
else
*sizep = aflCall(2, (u_long)buf, bufsz);
return buf;
}

/* buf should point to u_int64_t[2] */
int
startWork(u_int32_t start, u_int32_t end)
{
aflInit();
if(aflTestMode)
return 0;
arr[0] = start;
arr[1] = end;
arr[2] = 0;
arr[3] = 0;
return aflCall(3, (u_long)arr, 0);
}

int
doneWork(int val)
{
aflInit();
if(aflTestMode)
return 0;
return aflCall(4, (u_long)val, 0);
}

169 changes: 169 additions & 0 deletions arm/argfd.c
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#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/eventfd.h>
#include <sys/epoll.h>
#include <sys/inotify.h>
#include <sys/timerfd.h>
#include <netinet/in.h>
//#include <linux/memfd.h>
//#include <sys/syscall.h>

#include "drv.h"
#include "sysc.h"

/* to ease compilation when memfd isnt supported on compilation host */
#define MFD_CLOEXEC 0x0001U
#define MFD_ALLOW_SEALING 0x0002U
#define SYS_memfd_create 319 /* x86 */
static int memfd_create(const char *name, unsigned int flags) {
return syscall(SYS_memfd_create, name, flags);
}

int getStdFile(int typ)
{
int fd, pipes[2];

fd = -1;
switch(typ) {
#define F(n, fn, flg) case n: fd = open(fn, flg); break;
F(0, "/", O_RDONLY);
F(1, "/proc/uptime", O_RDONLY);
#define S(n, a,b,c) case n: fd = socket(a, b, c); break;
S(2, AF_INET, SOCK_STREAM, 0);
S(3, AF_INET, SOCK_DGRAM, 0);
S(4, AF_UNIX, SOCK_STREAM, 0);
S(5, AF_UNIX, SOCK_DGRAM, 0);

case 6:
if(pipe(pipes) == -1) return -1;
fd = pipes[0];
break;
case 7:
if(pipe(pipes) == -1) return -1;
fd = pipes[1];
break;

#define EV(n, i, fl) case n: fd = eventfd(i, fl); break;
EV( 8, 0, 0);
EV( 9, 1, EFD_CLOEXEC);
EV(10, 2, EFD_NONBLOCK);
EV(11, 3, EFD_SEMAPHORE);
EV(12, 4, EFD_CLOEXEC | EFD_NONBLOCK)
EV(13, 5, EFD_CLOEXEC | EFD_SEMAPHORE)
EV(14, 6, EFD_NONBLOCK | EFD_SEMAPHORE)
EV(15, 7, EFD_CLOEXEC | EFD_NONBLOCK | EFD_SEMAPHORE)

#define EP(n, x) case n: fd = epoll_create(x); break;
EP(16, 1);
EP(17, EPOLL_CLOEXEC);

#define IN(n, x) case n: fd = inotify_init1(x); break;
IN(18, 0);
IN(19, IN_NONBLOCK);
IN(20, IN_CLOEXEC);
IN(21, IN_NONBLOCK | IN_CLOEXEC);

#define MEM(n, nm, fl) case n: fd = memfd_create(nm, fl); break;
MEM(22, "memfd1", 0);
MEM(23, "memfd2", MFD_CLOEXEC);
MEM(24, "memfd3", MFD_ALLOW_SEALING);
MEM(25, "memfd4", MFD_CLOEXEC | MFD_ALLOW_SEALING);

#define TIM(n, t, fl) case n: fd = timerfd_create(t, fl); break;
TIM(26, CLOCK_REALTIME, 0);
TIM(27, CLOCK_REALTIME, TFD_NONBLOCK);
TIM(28, CLOCK_REALTIME, TFD_CLOEXEC);
TIM(29, CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC);
TIM(30, CLOCK_MONOTONIC, 0);
TIM(31, CLOCK_MONOTONIC, TFD_NONBLOCK);
TIM(32, CLOCK_MONOTONIC, TFD_CLOEXEC);
TIM(33, CLOCK_MONOTONIC, TFD_NONBLOCK | TFD_CLOEXEC);

S(34, AF_UNIX, SOCK_STREAM, 0);
S(35, AF_UNIX, SOCK_DGRAM, 0);
S(36, AF_UNIX, SOCK_SEQPACKET, 0);
S(37, AF_UNIX, SOCK_RAW, 0);
S(38, AF_UNIX, SOCK_RDM, 0);
S(39, AF_UNIX, SOCK_PACKET, 0);
S(40, AF_INET, SOCK_STREAM, 0);
S(41, AF_INET, SOCK_DGRAM, 0);
S(42, AF_INET, SOCK_SEQPACKET, 0);
S(43, AF_INET, SOCK_RAW, IPPROTO_RAW);
S(44, AF_INET, SOCK_RDM, 0);
S(45, AF_INET, SOCK_PACKET, 0);
S(46, AF_INET6, SOCK_STREAM, 0);
S(47, AF_INET6, SOCK_DGRAM, 0);
S(48, AF_INET6, SOCK_SEQPACKET, 0);
S(49, AF_INET6, SOCK_RAW, IPPROTO_RAW);
S(50, AF_INET6, SOCK_RDM, 0);
S(51, AF_INET6, SOCK_PACKET, 0);
S(52, AF_IPX, SOCK_STREAM, 0);
S(53, AF_IPX, SOCK_DGRAM, 0);
S(54, AF_IPX, SOCK_SEQPACKET, 0);
S(55, AF_IPX, SOCK_RAW, 0);
S(56, AF_IPX, SOCK_RDM, 0);
S(57, AF_IPX, SOCK_PACKET, 0);
S(58, AF_NETLINK, SOCK_STREAM, 0);
S(59, AF_NETLINK, SOCK_DGRAM, 0);
S(60, AF_NETLINK, SOCK_SEQPACKET, 0);
S(61, AF_NETLINK, SOCK_RAW, 0);
S(62, AF_NETLINK, SOCK_RDM, 0);
S(63, AF_NETLINK, SOCK_PACKET, 0);
S(64, AF_X25, SOCK_STREAM, 0);
S(65, AF_X25, SOCK_DGRAM, 0);
S(66, AF_X25, SOCK_SEQPACKET, 0);
S(67, AF_X25, SOCK_RAW, 0);
S(68, AF_X25, SOCK_RDM, 0);
S(69, AF_X25, SOCK_PACKET, 0);
S(70, AF_AX25, SOCK_STREAM, 0);
S(71, AF_AX25, SOCK_DGRAM, 0);
S(72, AF_AX25, SOCK_SEQPACKET, 0);
S(73, AF_AX25, SOCK_RAW, 0);
S(74, AF_AX25, SOCK_RDM, 0);
S(75, AF_AX25, SOCK_PACKET, 0);
S(76, AF_ATMPVC, SOCK_STREAM, 0);
S(77, AF_ATMPVC, SOCK_DGRAM, 0);
S(78, AF_ATMPVC, SOCK_SEQPACKET, 0);
S(79, AF_ATMPVC, SOCK_RAW, 0);
S(80, AF_ATMPVC, SOCK_RDM, 0);
S(81, AF_ATMPVC, SOCK_PACKET, 0);
S(82, AF_APPLETALK, SOCK_STREAM, 0);
S(83, AF_APPLETALK, SOCK_DGRAM, 0);
S(84, AF_APPLETALK, SOCK_SEQPACKET, 0);
S(85, AF_APPLETALK, SOCK_RAW, 0);
S(86, AF_APPLETALK, SOCK_RDM, 0);
S(87, AF_APPLETALK, SOCK_PACKET, 0);
S(88, AF_PACKET, SOCK_STREAM, 0);
S(89, AF_PACKET, SOCK_DGRAM, 0);
S(90, AF_PACKET, SOCK_SEQPACKET, 0);
S(91, AF_PACKET, SOCK_RAW, 0);
S(92, AF_PACKET, SOCK_RDM, 0);
S(93, AF_PACKET, SOCK_PACKET, 0);
S(94, AF_ALG, SOCK_STREAM, 0);
S(95, AF_ALG, SOCK_DGRAM, 0);
S(96, AF_ALG, SOCK_SEQPACKET, 0);
S(97, AF_ALG, SOCK_RAW, 0);
S(98, AF_ALG, SOCK_RDM, 0);
S(99, AF_ALG, SOCK_PACKET, 0);

#define SP(n, f, ty, idx) case n: socketpair(f, ty, 0, pipes); fd = pipes[idx]; break
SP(100, AF_UNIX, SOCK_STREAM, 0);
SP(101, AF_UNIX, SOCK_STREAM, 1);
SP(102, AF_UNIX, SOCK_DGRAM, 0);
SP(103, AF_UNIX, SOCK_DGRAM, 1);
SP(104, AF_UNIX, SOCK_SEQPACKET, 0);
SP(105, AF_UNIX, SOCK_SEQPACKET, 1);

default:
// XXX nonblocking sockets?
// XXX AF_NETLINK x (DGRAM,RAW) x protonr 0..22
// XXX (INET, INET6) x SOCK_RAW x protonr 0..256
// XXX PACKET X (DGRAM, RAW) x htons(rawtypes)
// XXX weird files from /dev, /proc, /sys, etc..
return -1;
}
return fd;
}

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