+// vim:shiftwidth=2:expandtab
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <signal.h>
+#include <termios.h>
+
+#include "realfuncs.h"
+#include "header.h"
+
+#if (DBG & 1)
+#define strace printf
+#else
+#define strace(...)
+#endif
+
+#define UNUSED __attribute__((unused))
+
+static const struct dev_fd_t takeover_devs[] = {
+ { "/dev/mem", FAKEDEV_MEM },
+ { "/dev/GPIO", FAKEDEV_GPIO },
+ { "/dev/fb0", FAKEDEV_FB0 },
+ { "/dev/fb/0", FAKEDEV_FB0 },
+ { "/dev/fb1", FAKEDEV_FB1 },
+ { "/dev/fb/1", FAKEDEV_FB1 },
+ { "/dev/mmuhack", FAKEDEV_MMUHACK },
+ { "/dev/tty", -1 }, // XXX hmh..
+ { "/dev/tty0", FAKEDEV_TTY0 },
+};
+
+static int w_open(const char *pathname, int flags, mode_t mode)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(takeover_devs); i++) {
+ if (strcmp(pathname, takeover_devs[i].name) == 0) {
+ ret = takeover_devs[i].fd;
+ break;
+ }
+ }
+
+ 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 (FAKEDEV_MEM <= fd && fd < FAKEDEV_FD_BOUNDARY)
+ ret = emu_do_mmap(length, prot, flags, fd, offset);
+ else
+ ret = mmap(addr, length, prot, flags, fd, offset);
+
+ // threads are using heap before they mmap their stack
+ // printf needs valid stack for pthread/errno
+ if (((long)&ret & 0xf0000000) == 0xb0000000)
+ strace("mmap(%p, %x, %x, %x, %d, %lx) = %p\n", addr, length, prot, flags, fd, (long)offset, ret);
+ return ret;
+}
+#define w_mmap2 w_mmap
+
+static ssize_t w_read(int fd, void *buf, size_t count)
+{
+ ssize_t ret;
+ if (fd == FAKEDEV_GPIO)
+ ret = emu_read_gpiodev(buf, count);
+ else
+ ret = read(fd, buf, count);
+
+ //strace("read(%d, %p, %d) = %d\n", fd, buf, count, ret);
+ return ret;
+}
+
+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;
+}
+
+/* dynamic only */
+static UNUSED int w_tcgetattr(int fd, struct termios *termios_p)
+{
+ int ret;
+ if (fd != FAKEDEV_TTY0)
+ ret = tcgetattr(fd, termios_p);
+ else
+ ret = 0;
+
+ strace("tcgetattr(%d, %p) = %d\n", fd, termios_p, ret);
+ return ret;
+}
+
+static UNUSED int w_tcsetattr(int fd, int optional_actions,
+ const struct termios *termios_p)
+{
+ int ret;
+ if (fd != FAKEDEV_TTY0)
+ ret = tcsetattr(fd, optional_actions, termios_p);
+ else
+ ret = 0;
+
+ strace("tcsetattr(%d, %x, %p) = %d\n", fd, optional_actions, termios_p, ret);
+ return ret;
+}
+
+static UNUSED FILE *w_fopen(const char *path, const char *mode)
+{
+ FILE *ret = emu_do_fopen(path, mode);
+ strace("fopen(%s, %s) = %p\n", path, mode, ret);
+ return ret;
+}
+
+static UNUSED int w_system(const char *command)
+{
+ int ret = emu_do_system(command);
+ strace("system(%s) = %d\n", command, ret);
+ return ret;
+}
+
+#undef open
+#undef fopen
+#undef mmap
+#undef read
+#undef ioctl
+#undef sigaction
+#undef tcgetattr
+#undef tcsetattr
+#undef system
+
+#ifdef DL
+
+#define MAKE_WRAP_SYM(sym) \
+ /* alias wrap symbols to real names */ \
+ typeof(sym) sym __attribute__((alias("w_" #sym))); \
+ /* wrapper to real functions, to be set up on load */ \
+ static typeof(sym) *p_real_##sym
+
+MAKE_WRAP_SYM(open);
+MAKE_WRAP_SYM(fopen);
+MAKE_WRAP_SYM(mmap);
+MAKE_WRAP_SYM(read);
+MAKE_WRAP_SYM(ioctl);
+MAKE_WRAP_SYM(sigaction);
+MAKE_WRAP_SYM(tcgetattr);
+MAKE_WRAP_SYM(tcsetattr);
+MAKE_WRAP_SYM(system);
+typeof(mmap) mmap2 __attribute__((alias("w_mmap")));
+
+#define REAL_FUNC_NP(name) \
+ { #name, (void **)&p_real_##name }
+
+static const struct {
+ const char *name;
+ void **func_ptr;
+} real_funcs_np[] = {
+ REAL_FUNC_NP(open),
+ REAL_FUNC_NP(fopen),
+ REAL_FUNC_NP(mmap),
+ REAL_FUNC_NP(read),
+ REAL_FUNC_NP(ioctl),
+ REAL_FUNC_NP(sigaction),
+ REAL_FUNC_NP(tcgetattr),
+ REAL_FUNC_NP(tcsetattr),
+ REAL_FUNC_NP(system),
+};
+
+#define open p_real_open
+#define fopen p_real_fopen
+#define mmap p_real_mmap
+#define read p_real_read
+#define ioctl p_real_ioctl
+#define sigaction p_real_sigaction
+#define tcgetattr p_real_tcgetattr
+#define tcsetattr p_real_tcsetattr
+#define system p_real_system
+
+#undef MAKE_WRAP_SYM
+#undef REAL_FUNC_NP
+
+#endif
+
+// just call real funcs for static, pointer for dynamic
+int real_open(const char *pathname, int flags, mode_t mode)
+{
+ return open(pathname, flags, mode);
+}
+
+FILE *real_fopen(const char *path, const char *mode)
+{
+ return fopen(path, mode);
+}
+
+void *real_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
+{
+ return mmap(addr, length, prot, flags, fd, offset);
+}
+
+int real_read(int fd, void *buf, size_t count)
+{
+ return read(fd, buf, count);
+}
+
+int real_ioctl(int d, int request, void *argp)
+{
+ return ioctl(d, request, argp);
+}
+
+int real_sigaction(int signum, const sigaction_t *act, sigaction_t *oldact)
+{
+ return sigaction(signum, act, oldact);
+}
+
+int real_tcgetattr(int fd, struct termios *termios_p)
+{
+ return tcgetattr(fd, termios_p);
+}
+
+int real_tcsetattr(int fd, int optional_actions,
+ const struct termios *termios_p)
+{
+ return tcsetattr(fd, optional_actions, termios_p);
+}
+
+int real_system(const char *command)
+{
+ return system(command);
+}
notaz.gp2x.de / ginge.git / commitdiff