#include <fcntl.h>
#include <sys/mman.h>
#include <unistd.h>
+#include <sys/ioctl.h>
#include "header.h"
#include "sys_cacheflush.h"
+#if 0
+#define strace printf
+#else
#define strace(...)
-//#define strace printf
+#endif
+
+// note: first mask must be always full for search algo
+static const unsigned int sig_mask_all[] = {
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xffffffff
+};
static const unsigned int sig_open[] = {
0xe59cc000, 0xe33c0000, 0x1a000003, 0xef900005
};
+#define sig_mask_open sig_mask_all
static const unsigned int sig_mmap[] = {
0xe92d000f, 0xe1a0000d, 0xef90005a, 0xe28dd010
};
+#define sig_mask_mmap sig_mask_all
static const unsigned int sig_mmap_[] = {
0xe52d5004, 0xe59d5008, 0xe52d4004, 0xe59d4008,
0xe1b0ca05, 0x1a000006, 0xe1a05625, 0xef9000c0
};
+#define sig_mask_mmap_ sig_mask_all
static const unsigned int sig_read[] = {
0xe59fc080, 0xe59cc000, 0xe33c0000, 0x1a000003, 0xef900003
};
+#define sig_mask_read sig_mask_all
-enum {
- FAKEDEV_MEM = 10001,
- FAKEDEV_GPIO,
- FAKEDEV_FB0,
- FAKEDEV_FB1,
- FAKEDEV_MMUHACK,
+static const unsigned int sig_ioctl[] = {
+ 0xef900036, 0xe3700a01, 0x312fff1e
};
+#define sig_mask_ioctl sig_mask_all
-static const struct {
- const char *name;
- int fd;
-} takeover_devs[] = {
+static const unsigned int sig_sigaction[] = {
+ 0xe59f300c, 0xe3530000, 0x0a000000, 0xea000000, 0xea000000
+};
+static const unsigned int sig_mask_sigaction[] = {
+ 0xffffffff, 0xffffffff, 0xffffffff, 0xff000000, 0xff000000
+};
+
+static const struct dev_fd_t takeover_devs[] = {
{ "/dev/mem", FAKEDEV_MEM },
{ "/dev/GPIO", FAKEDEV_GPIO },
{ "/dev/fb0", FAKEDEV_FB0 },
if (i == ARRAY_SIZE(takeover_devs))
ret = open(pathname, flags, mode);
+ if (ret >= 0) {
+ for (i = 0; emu_interesting_fds[i].name != NULL; i++) {
+ if (strcmp(pathname, emu_interesting_fds[i].name) == 0) {
+ emu_interesting_fds[i].fd = ret;
+ break;
+ }
+ }
+ }
+
strace("open(%s) = %d\n", pathname, ret);
return ret;
}
static void *w_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
void *ret;
- if (fd != FAKEDEV_MEM)
- ret = mmap(addr, length, prot, flags, fd, offset);
+ if (FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY)
+ ret = emu_do_mmap(length, prot, flags, fd, offset);
else
- ret = emu_mmap_dev(length, prot, flags, offset);
+ ret = mmap(addr, length, prot, flags, fd, offset);
// threads are using heap before they mmap their stack
// printf needs valid stack for pthtead/errno
}
#define w_mmap_ w_mmap
-ssize_t w_read(int fd, void *buf, size_t count)
+static ssize_t w_read(int fd, void *buf, size_t count)
{
ssize_t ret;
if (fd != FAKEDEV_GPIO)
return read(fd, buf, count);
ret = emu_read_gpiodev(buf, count);
- //printf("read(%d, %p, %d) = %d\n", fd, buf, count, ret);
+ //strace("read(%d, %p, %d) = %d\n", fd, buf, count, ret);
return ret;
}
-#define PATCH(f) { sig_##f, ARRAY_SIZE(sig_##f), w_##f }
+static int w_ioctl(int fd, int request, void *argp)
+{
+ int ret;
+
+ if ((FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY) ||
+ fd == emu_interesting_fds[IFD_SOUND].fd)
+ ret = emu_do_ioctl(fd, request, argp);
+ else
+ ret = ioctl(fd, request, argp);
+
+ strace("ioctl(%d, %08x, %p) = %d\n", fd, request, argp, ret);
+ return ret;
+}
+
+static int w_sigaction(int signum, const void *act, void *oldact)
+{
+ strace("sigaction(%d, %p, %p) = %d\n", signum, act, oldact, 0);
+ return 0;
+}
+
+#define PATCH(f) { sig_##f, sig_mask_##f, ARRAY_SIZE(sig_##f), w_##f }
static const struct {
const unsigned int *sig;
+ const unsigned int *sig_mask;
size_t sig_cnt;
void *func;
} patches[] = {
PATCH(mmap),
PATCH(mmap_), // mmap using mmap2 syscall
PATCH(read),
+ PATCH(ioctl),
+ PATCH(sigaction),
};
void do_patches(void *ptr, unsigned int size)
for (i = 0; i < ARRAY_SIZE(patches); i++) {
const unsigned int *sig = patches[i].sig;
+ const unsigned int *sig_mask = patches[i].sig_mask;
unsigned int *seg = (void *)(((long)ptr + 3) & ~3);
unsigned int *seg_end = seg + size / 4;
unsigned int sig0 = sig[0];
continue;
for (s = 1; s < patches[i].sig_cnt; s++)
- if (seg[s] != sig[s])
+ if ((seg[s] ^ sig[s]) & sig_mask[s])
break;
if (s == patches[i].sig_cnt)
continue;
found:
- printf(" patch #%i @ %08x\n", i, (int)seg);
+ dbg(" patch #%i @ %08x\n", i, (int)seg);
seg[0] = 0xe59ff000; // ldr pc, [pc]
seg[1] = 0;
seg[2] = (unsigned int)patches[i].func;