prepare for source release, relicense

[ginge.git] / loader / patches.c

diff --git a/loader/patches.c b/loader/patches.c
index f7e0b11..4b1735e 100644 (file)
--- a/loader/patches.c
+++ b/loader/patches.c
@@ -1,21 +1,15 @@
-// vim:shiftwidth=2:expandtab
+/*
+ * GINGE - GINGE Is Not Gp2x Emulator
+ * (C) notaz, 2010-2011
+ *
+ * This work is licensed under the MAME license, see COPYING file for details.
+ */
 #include <stdio.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 "header.h"
 #include "sys_cacheflush.h"
 
-#if 0
-#define strace printf
-#else
-#define strace(...)
-#endif
+#include "override.c"
 
 // note: first mask must be always full for search algo
 static const unsigned int sig_mask_all[] = {
@@ -33,11 +27,11 @@ static const unsigned int sig_mmap[] = {
 };
 #define sig_mask_mmap sig_mask_all
 
-static const unsigned int sig_mmap_[] = {
+static const unsigned int sig_mmap2[] = {
   0xe52d5004, 0xe59d5008, 0xe52d4004, 0xe59d4008,
   0xe1b0ca05, 0x1a000006, 0xe1a05625, 0xef9000c0
 };
-#define sig_mask_mmap_ sig_mask_all
+#define sig_mask_mmap2 sig_mask_all
 
 static const unsigned int sig_read[] = {
   0xe59fc080, 0xe59cc000, 0xe33c0000, 0x1a000003, 0xef900003
@@ -56,91 +50,25 @@ 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 },
-  { "/dev/fb/0",    FAKEDEV_FB0 },
-  { "/dev/fb1",     FAKEDEV_FB1 },
-  { "/dev/fb/1",    FAKEDEV_FB1 },
-  { "/dev/mmuhack", FAKEDEV_MMUHACK },
+static const unsigned int sig_execve[] = {
+  0xef90000b, 0xe1a04000, 0xe3700a01
 };
+#define sig_mask_execve sig_mask_all
 
-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 pthtead/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_mmap_ w_mmap
-
-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);
-  //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 const unsigned int sig_execve2[] = {
+  0xef90000b, 0xe3700a01, 0xe1a04000
+};
+#define sig_mask_execve2 sig_mask_all
 
-static int w_sigaction(int signum, const void *act, void *oldact)
-{
-  strace("sigaction(%d, %p, %p) = %d\n", signum, act, oldact, 0);
-  return 0;
-}
+static const unsigned int sig_chdir[] = {
+  0xef90000c, 0xe3700a01, 0x312fff1e, 0xea0004bb
+};
+static const unsigned int sig_mask_chdir[] = {
+  0xffffffff, 0xffffffff, 0xffffffff, 0xff000000
+};
 
-#define PATCH(f) { sig_##f, sig_mask_##f, ARRAY_SIZE(sig_##f), w_##f }
+#define PATCH_(f,p) { sig_##p, sig_mask_##p, ARRAY_SIZE(sig_##p), w_##f }
+#define PATCH(f) PATCH_(f,f)
 
 static const struct {
   const unsigned int *sig;
@@ -150,10 +78,12 @@ static const struct {
 } patches[] = {
   PATCH(open),
   PATCH(mmap),
-  PATCH(mmap_), // mmap using mmap2 syscall
+  PATCH(mmap2), // mmap2 syscall
   PATCH(read),
   PATCH(ioctl),
   PATCH(sigaction),
+//  PATCH_(execve, execve2), // hangs
+  PATCH(chdir),
 };
 
 void do_patches(void *ptr, unsigned int size)
@@ -190,3 +120,4 @@ found:
   sys_cacheflush(ptr, (char *)ptr + size);
 }
 
+// vim:shiftwidth=2:expandtab