From: notaz <notasas@gmail.com>
Date: Sat, 9 Jan 2016 19:09:46 +0000 (+0200)
Subject: get rid of some libc deps
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b4f4cb40a6f3f4ecc05c7b6c8f2e852282234519;p=ginge.git

get rid of some libc deps

mostly important that game called ginge's code doesn't call libc
---

diff --git a/loader/Makefile b/loader/Makefile
index eff5e2f..f326814 100644
--- a/loader/Makefile
+++ b/loader/Makefile
@@ -4,6 +4,7 @@ CC = $(CROSS_COMPILE)gcc
 AS = $(CROSS_COMPILE)as
 CFLAGS += -Wall -ggdb -DLOADER
 LDFLAGS += -ggdb
+#LDFLAGS += -nodefaultlibs # NYET
 ifndef DEBUG
 CFLAGS += -O2 -fno-strict-aliasing
 LDFLAGS += -O2
diff --git a/loader/emu.c b/loader/emu.c
index 64c2c99..d142611 100644
--- a/loader/emu.c
+++ b/loader/emu.c
@@ -370,7 +370,7 @@ static void *fb_sync_thread(void *arg)
         && wait_ret != -ETIMEDOUT)
     {
       err("fb_thread: futex error: %d\n", wait_ret);
-      g_sleep(1);
+      sleep(1);
       goto check_keys;
     }
     if (fb_sync_thread_paused) {
@@ -977,8 +977,8 @@ void emu_init(void *map_bottom)
 
 #ifdef PND
   if (geteuid() == 0) {
-    fprintf(stderr, "don't try to run as root, device registers or memory "
-                    "might get trashed crashing the OS or even damaging the device.\n");
+    err("don't try to run as root, device registers or memory "
+        "might get trashed crashing the OS or even damaging the device.\n");
     exit(1);
   }
 #endif
@@ -1051,11 +1051,11 @@ void emu_init(void *map_bottom)
   sigaction(SIGSEGV, &segv_action, NULL);
 }
 
-int emu_read_gpiodev(void *buf, int count)
+long emu_read_gpiodev(void *buf, int count)
 {
   if (count <= 0) {
     err("gpiodev read %d?\n", count);
-    return -1;
+    return -EINVAL;
   }
   if (count > 4)
     count = 4;
@@ -1065,25 +1065,24 @@ int emu_read_gpiodev(void *buf, int count)
   return count;
 }
 
-static void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
+static long emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int offset)
 {
   u8 *umem, *umem_end;
 
   // SoC regs
   if ((offset & ~0x1ffff) == 0xc0000000) {
-    return mmap((void *)0x7f000000, length, PROT_NONE,
+    return g_mmap2_raw((void *)0x7f000000, length, PROT_NONE,
       MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
   }
   // MMSP2 blitter
   if ((offset & ~0xffff) == 0xe0020000) {
-    return mmap((void *)0x7f100000, length, PROT_NONE,
+    return g_mmap2_raw((void *)0x7f100000, length, PROT_NONE,
       MAP_PRIVATE|MAP_ANONYMOUS|MAP_FIXED|MAP_NORESERVE, -1, 0);
   }
   // upper mem
   if ((offset & 0xfe000000) != 0x02000000) {
     err("unexpected devmem mmap @ %08x\n", offset);
-    errno = EINVAL;
-    return MAP_FAILED;
+    return -EINVAL;
   }
 
   umem = uppermem_lookup(offset, &umem_end);
@@ -1092,10 +1091,11 @@ static void *emu_mmap_dev(unsigned int length, int prot, int flags, unsigned int
         offset, umem + length - umem_end);
 
   dbg("upper mem @ %08x %x = %p\n", offset, length, umem);
-  return umem;
+  return (long)umem;
 }
 
-void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset)
+long emu_do_mmap(unsigned int length, int prot, int flags, int fd,
+  unsigned int offset)
 {
   if (fd == FAKEDEV_MEM)
     return emu_mmap_dev(length, prot, flags, offset);
@@ -1107,11 +1107,10 @@ void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int
     return emu_mmap_dev(length, prot, flags, offset + 0x03381000);
 
   err("bad/ni mmap(?, %d, %x, %x, %d, %08x)\n", length, prot, flags, fd, offset);
-  errno = EINVAL;
-  return MAP_FAILED;
+  return -EINVAL;
 }
 
-int emu_do_munmap(void *addr, unsigned int length)
+long emu_do_munmap(void *addr, unsigned int length)
 {
   u8 *p = addr;
 
@@ -1131,15 +1130,13 @@ static void emu_sound_open(int fd)
 
   // set default buffer size to 16 * 1K
   frag = (16<<16) | 10; // 16K
-  ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
-  if (ret != 0) {
-    err("snd ioctl SETFRAGMENT %08x: ", frag);
-    perror(NULL);
-  }
+  ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
+  if (ret != 0)
+    err("snd ioctl SETFRAGMENT %08x: %d\n", frag, ret);
 #endif
 }
 
-static int emu_sound_ioctl(int fd, int request, void *argp)
+static long emu_sound_ioctl(int fd, int request, void *argp)
 {
   int *arg = argp;
 
@@ -1155,7 +1152,9 @@ static int emu_sound_ioctl(int fd, int request, void *argp)
    * Catch this and set to something that works. */
   switch(request) {
     case SNDCTL_DSP_SETFRAGMENT: {
-      int ret, bsize, frag, frag_cnt;
+      int bsize, frag, frag_cnt;
+      long ret;
+
       if (arg == NULL)
         break;
 
@@ -1180,11 +1179,9 @@ static int emu_sound_ioctl(int fd, int request, void *argp)
       }
 
       frag |= frag_cnt << 16;
-      ret = ioctl(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
-      if (ret != 0) {
-        err("snd ioctl SETFRAGMENT %08x: ", frag);
-        perror(NULL);
-      }
+      ret = g_ioctl_raw(fd, SNDCTL_DSP_SETFRAGMENT, &frag);
+      if (ret != 0)
+        err("snd ioctl SETFRAGMENT %08x: %ld\n", frag, ret);
       // indicate success even if we fail (because of ALSA mostly),
       // things like MikMod will bail out otherwise.
       return 0;
@@ -1196,10 +1193,10 @@ static int emu_sound_ioctl(int fd, int request, void *argp)
       break;
   }
 
-  return ioctl(fd, request, argp);
+  return g_ioctl_raw(fd, request, argp);
 }
 
-int emu_do_ioctl(int fd, int request, void *argp)
+long emu_do_ioctl(int fd, int request, void *argp)
 {
   if (fd == emu_interesting_fds[IFD_SOUND].fd)
     return emu_sound_ioctl(fd, request, argp);
@@ -1265,8 +1262,7 @@ int emu_do_ioctl(int fd, int request, void *argp)
 
 fail:
   err("bad/ni ioctl(%d, %08x, %p)\n", fd, request, argp);
-  errno = EINVAL;
-  return -1;
+  return -EINVAL;
 }
 
 struct dev_fd_t emu_interesting_fds[] = {
diff --git a/loader/header.h b/loader/header.h
index 4bc6e1b..208e5ab 100644
--- a/loader/header.h
+++ b/loader/header.h
@@ -43,10 +43,10 @@ struct op_context;
 
 void  emu_init(void *map_bottom);
 void  emu_call_handle_op(struct op_context *op_ctx);
-void *emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset);
-int   emu_do_munmap(void *addr, unsigned int length);
-int   emu_do_ioctl(int fd, int request, void *argp);
-int   emu_read_gpiodev(void *buf, int count);
+long  emu_do_mmap(unsigned int length, int prot, int flags, int fd, unsigned int offset);
+long  emu_do_munmap(void *addr, unsigned int length);
+long  emu_do_ioctl(int fd, int request, void *argp);
+long  emu_read_gpiodev(void *buf, int count);
 void *emu_do_fopen(const char *path, const char *mode);
 int   emu_do_system(const char *command);
 int   emu_do_execve(const char *filename, char *const argv[], char *const envp[]);
diff --git a/loader/llibc.c b/loader/llibc.c
index 484b52d..7885372 100644
--- a/loader/llibc.c
+++ b/loader/llibc.c
@@ -199,10 +199,4 @@ void g_fprintf(int fd, const char *fmt, ...)
   g_write_raw(fd, buf, d - buf);
 }
 
-void g_sleep(unsigned int seconds)
-{
-  struct timespec ts = { seconds, 0 };
-  g_nanosleep_raw(&ts, NULL);
-}
-
 // vim:shiftwidth=2:expandtab
diff --git a/loader/llibc.h b/loader/llibc.h
index 5381972..5bcd4ea 100644
--- a/loader/llibc.h
+++ b/loader/llibc.h
@@ -3,5 +3,3 @@ void g_fprintf(int fd, const char *fmt, ...)
 
 #define g_printf(fmt, ...) \
 	g_fprintf(1, fmt, ##__VA_ARGS__)
-
-void g_sleep(unsigned int seconds);
diff --git a/loader/override.c b/loader/override.c
index 86de405..a9d545b 100644
--- a/loader/override.c
+++ b/loader/override.c
@@ -1,6 +1,6 @@
 /*
  * GINGE - GINGE Is Not Gp2x Emulator
- * (C) notaz, 2010-2011
+ * (C) notaz, 2010-2011,2016
  *
  * This work is licensed under the MAME license, see COPYING file for details.
  */
@@ -19,10 +19,12 @@
 #include <errno.h>
 
 #include "realfuncs.h"
+#include "syscalls.h"
+#include "llibc.h"
 #include "header.h"
 
 #if (DBG & 1)
-#define strace printf
+#define strace g_printf
 #else
 #define strace(...)
 #endif
@@ -44,9 +46,10 @@ static const struct dev_fd_t takeover_devs[] = {
 #endif
 };
 
-static int w_open(const char *pathname, int flags, mode_t mode)
+static long w_open_raw(const char *pathname, int flags, mode_t mode)
 {
-  int i, ret;
+  long ret;
+  int i;
 
   for (i = 0; i < ARRAY_SIZE(takeover_devs); i++) {
     const char *p, *oname;
@@ -66,7 +69,7 @@ static int w_open(const char *pathname, int flags, mode_t mode)
   }
 
   if (i == ARRAY_SIZE(takeover_devs))
-    ret = open(pathname, flags, mode);
+    ret = g_open_raw(pathname, flags, mode);
 
   if (ret >= 0) {
     for (i = 0; emu_interesting_fds[i].name != NULL; i++) {
@@ -80,64 +83,95 @@ static int w_open(const char *pathname, int flags, mode_t mode)
     }
   }
 
-  strace("open(%s) = %d\n", pathname, ret);
+  strace("open(%s) = %ld\n", pathname, ret);
   return ret;
 }
 
-static void *w_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
+static int w_open(const char *pathname, int flags, mode_t mode)
+{
+  long ret = w_open_raw(pathname, flags, mode);
+  return g_syscall_error(ret);
+}
+
+static long w_mmap_raw(void *addr, size_t length, int prot, int flags,
+  int fd, off_t offset)
 {
-  void *ret;
+  long 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);
+    ret = g_mmap2_raw(addr, length, prot, flags, fd, offset >> 12);
 
-  // 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);
+  strace("mmap(%p, %x, %x, %x, %d, %lx) = %lx\n",
+         addr, length, prot, flags, fd, (long)offset, ret);
   return ret;
 }
+
+static long w_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
+{
+  long ret = w_mmap_raw(addr, length, prot, flags, fd, offset);
+  return g_syscall_error(ret);
+}
 #define w_mmap2 w_mmap
 
-static int w_munmap(void *addr, size_t length)
+static long w_munmap_raw(void *addr, size_t length)
 {
-  int ret;
+  long ret;
+
   ret = emu_do_munmap(addr, length);
   if (ret == -EAGAIN)
-    ret = munmap(addr, length);
+    ret = g_munmap_raw(addr, length);
 
-  if (((long)&ret & 0xf0000000) == 0xb0000000)
-    strace("munmap(%p, %x) = %d\n", addr, length, ret);
+  strace("munmap(%p, %x) = %ld\n", addr, length, ret);
   return ret;
 }
 
-static ssize_t w_read(int fd, void *buf, size_t count)
+static int w_munmap(void *addr, size_t length)
+{
+  long ret = w_munmap_raw(addr, length);
+  return g_syscall_error(ret);
+}
+
+long w_read_raw(int fd, void *buf, size_t count)
 {
-  ssize_t ret;
+  long ret;
+
   if (fd == FAKEDEV_GPIO)
     ret = emu_read_gpiodev(buf, count);
   else
-    ret = read(fd, buf, count);
+    ret = g_read_raw(fd, buf, count);
 
-  //strace("read(%d, %p, %d) = %d\n", fd, buf, count, ret);
+  //strace("read(%d, %p, %ld) = %ld\n", fd, buf, count, ret);
   return ret;
 }
 
-static int w_ioctl(int fd, int request, void *argp)
+static ssize_t w_read(int fd, void *buf, size_t count)
 {
-  int ret;
+  long ret = w_read_raw(fd, buf, count);
+  return g_syscall_error(ret);
+}
+
+long w_ioctl_raw(int fd, int request, void *argp)
+{
+  long 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);
+    ret = g_ioctl_raw(fd, request, argp);
 
-  strace("ioctl(%d, %08x, %p) = %d\n", fd, request, argp, ret);
+  strace("ioctl(%d, %08x, %p) = %ld\n", fd, request, argp, ret);
   return ret;
 }
 
+static int w_ioctl(int fd, int request, void *argp)
+{
+  long ret = w_ioctl_raw(fd, request, argp);
+  return g_syscall_error(ret);
+}
+
 static int w_sigaction(int signum, const void *act, void *oldact)
 {
   strace("sigaction(%d, %p, %p) = %d\n", signum, act, oldact, 0);
@@ -228,13 +262,14 @@ static UNUSED int w_execve(const char *filename, char *const argv[],
 
 static int w_chdir(const char *path)
 {
-  int ret;
+  long ret;
+
   if (path != NULL && strstr(path, "/usr/gp2x") != NULL)
     ret = 0;
   else
-    ret = chdir(path);
+    ret = g_chdir_raw(path);
   strace("chdir(%s) = %d\n", path, ret);
-  return ret;
+  return g_syscall_error(ret);
 }
 
 #undef open
@@ -243,6 +278,7 @@ static int w_chdir(const char *path)
 #undef munmap
 #undef read
 #undef ioctl
+#undef close
 #undef sigaction
 #undef tcgetattr
 #undef tcsetattr
@@ -267,12 +303,12 @@ static int w_chdir(const char *path)
   static typeof(sym) *p_real_##sym
 
 // note: update symver too
-MAKE_WRAP_SYM(open);
+MAKE_WRAP_SYM_N(open);
 MAKE_WRAP_SYM(fopen);
-MAKE_WRAP_SYM(mmap);
-MAKE_WRAP_SYM(munmap);
-MAKE_WRAP_SYM(read);
-MAKE_WRAP_SYM(ioctl);
+MAKE_WRAP_SYM_N(mmap);
+MAKE_WRAP_SYM_N(munmap);
+MAKE_WRAP_SYM_N(read);
+MAKE_WRAP_SYM_N(ioctl);
 MAKE_WRAP_SYM(sigaction);
 MAKE_WRAP_SYM(tcgetattr);
 MAKE_WRAP_SYM(tcsetattr);
@@ -283,7 +319,7 @@ MAKE_WRAP_SYM_N(execle);
 MAKE_WRAP_SYM_N(execv);
 MAKE_WRAP_SYM_N(execvp);
 MAKE_WRAP_SYM(execve);
-MAKE_WRAP_SYM(chdir);
+MAKE_WRAP_SYM_N(chdir);
 typeof(mmap) mmap2 __attribute__((alias("w_mmap")));
 
 #define REAL_FUNC_NP(name) \
@@ -293,33 +329,33 @@ static const struct {
   const char *name;
   void **func_ptr;
 } real_funcs_np[] = {
-  REAL_FUNC_NP(open),
+  //REAL_FUNC_NP(open),
   REAL_FUNC_NP(fopen),
-  REAL_FUNC_NP(mmap),
-  REAL_FUNC_NP(munmap),
-  REAL_FUNC_NP(read),
-  REAL_FUNC_NP(ioctl),
+  //REAL_FUNC_NP(mmap),
+  //REAL_FUNC_NP(munmap),
+  //REAL_FUNC_NP(read),
+  //REAL_FUNC_NP(ioctl),
   REAL_FUNC_NP(sigaction),
   REAL_FUNC_NP(tcgetattr),
   REAL_FUNC_NP(tcsetattr),
   REAL_FUNC_NP(system),
   // exec* - skipped
   REAL_FUNC_NP(execve),
-  REAL_FUNC_NP(chdir),
+  //REAL_FUNC_NP(chdir),
 };
 
-#define open p_real_open
+//#define open p_real_open
 #define fopen p_real_fopen
-#define mmap p_real_mmap
-#define munmap p_real_munmap
-#define read p_real_read
-#define ioctl p_real_ioctl
+//#define mmap p_real_mmap
+//#define munmap p_real_munmap
+//#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
 #define execve p_real_execve
-#define chdir p_real_chdir
+//#define chdir p_real_chdir
 
 #undef MAKE_WRAP_SYM
 #undef REAL_FUNC_NP
@@ -331,11 +367,13 @@ int real_open(const char *pathname, int flags, ...)
 {
   va_list ap;
   mode_t mode;
+  long ret;
 
   va_start(ap, flags);
   mode = va_arg(ap, mode_t);
   va_end(ap);
-  return open(pathname, flags, mode);
+  ret = g_open_raw(pathname, flags, mode);
+  return g_syscall_error(ret);
 }
 
 FILE *real_fopen(const char *path, const char *mode)
@@ -343,24 +381,34 @@ 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)
+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);
+  long ret = g_mmap2_raw(addr, length, prot, flags, fd, offset >> 12);
+  return (void *)g_syscall_error(ret);
 }
 
 int real_munmap(void *addr, size_t length)
 {
-  return munmap(addr, length);
+  return g_syscall_error(g_munmap_raw(addr, length));
 }
 
 int real_read(int fd, void *buf, size_t count)
 {
-  return read(fd, buf, count);
+  long ret = g_read_raw(fd, buf, count);
+  return g_syscall_error(ret);
 }
 
-int real_ioctl(int d, int request, void *argp)
+int real_ioctl(int fd, int request, void *argp)
 {
-  return ioctl(d, request, argp);
+  long ret = g_ioctl_raw(fd, request, argp);
+  return g_syscall_error(ret);
+}
+
+int real_close(int fd)
+{
+  long ret = g_close_raw(fd);
+  return g_syscall_error(ret);
 }
 
 int real_sigaction(int signum, const sigaction_t *act, sigaction_t *oldact)
@@ -394,7 +442,25 @@ int real_execve(const char *filename, char *const argv[],
 
 int real_chdir(const char *path)
 {
-  return chdir(path);
+  long ret = g_chdir_raw(path);
+  return g_syscall_error(ret);
+}
+
+void real_sleep(unsigned int seconds)
+{
+  struct timespec ts = { seconds, 0 };
+  g_nanosleep_raw(&ts, NULL);
+}
+
+void real_usleep(unsigned int usec)
+{
+  struct timespec ts = { usec / 1000000, usec % 1000000 };
+  g_nanosleep_raw(&ts, NULL);
+}
+
+void real_exit(int status)
+{
+  g_exit_group_raw(status);
 }
 
 // vim:shiftwidth=2:expandtab
diff --git a/loader/patches.c b/loader/patches.c
index a6e3192..ada0043 100644
--- a/loader/patches.c
+++ b/loader/patches.c
@@ -163,8 +163,8 @@ asm( \
 "  ldmfd sp!, {r1-r3,r12,lr,pc}\n" \
 );
 
-SVC_CMN_R0_MOV_R4_WRAPPER(hw_read, w_read)
-SVC_CMN_R0_MOV_R4_WRAPPER(hw_ioctl, w_ioctl)
+SVC_CMN_R0_MOV_R4_WRAPPER(hw_read, w_read_raw)
+SVC_CMN_R0_MOV_R4_WRAPPER(hw_ioctl, w_ioctl_raw)
 
 #define PATCH_(p, f, t) { sig_##p, sig_mask_##p, ARRAY_SIZE(sig_##p), t, f, #p }
 #define PATCH(f) PATCH_(f, w_##f, 0)
diff --git a/loader/realfuncs.h b/loader/realfuncs.h
index 8a4fb58..fe83feb 100644
--- a/loader/realfuncs.h
+++ b/loader/realfuncs.h
@@ -9,6 +9,10 @@
 #include <signal.h>
 #include <termios.h>
 
+#include "llibc.h"
+
+#define printf(fmt, ...) \
+	g_fprintf(1, fmt, ##__VA_ARGS__)
 
 int   real_open(const char *pathname, int flags, ...);
 FILE *real_fopen(const char *path, const char *mode);
@@ -16,6 +20,7 @@ void *real_mmap(void *addr, size_t length, int prot, int flags, int fd, off_t of
 int   real_munmap(void *addr, size_t length);
 int   real_read(int fd, void *buf, size_t count);
 int   real_ioctl(int fd, int request, void *argp);
+int   real_close(int fd);
 int   real_sigaction(int signum, const struct sigaction *act, struct sigaction *oldact);
 typedef struct sigaction sigaction_t;
 int   real_tcgetattr(int fd, struct termios *termios_p);
@@ -24,6 +29,10 @@ int   real_system(const char *command);
 // exec* - skipped
 int   real_execve(const char *filename, char *const argv[], char *const envp[]);
 int   real_chdir(const char *path);
+void  real_sleep(unsigned int seconds);
+void  real_usleep(unsigned int usec);
+void __attribute__((noreturn))
+      real_exit(int status);
 
 #define open real_open
 #define fopen real_fopen
@@ -31,6 +40,7 @@ int   real_chdir(const char *path);
 #define munmap real_munmap
 #define read real_read
 #define ioctl real_ioctl
+#define close real_close
 #define sigaction real_sigaction
 #define tcgetattr real_tcgetattr
 #define tcsetattr real_tcsetattr
@@ -42,4 +52,7 @@ int   real_chdir(const char *path);
 #define execvp real_execvp
 #define execve real_execve
 #define chdir real_chdir
+#define sleep real_sleep
+#define usleep real_usleep
+#define exit real_exit
 
diff --git a/loader/syscalls.S b/loader/syscalls.S
index e72e7d2..0d47b81 100644
--- a/loader/syscalls.S
+++ b/loader/syscalls.S
@@ -75,14 +75,19 @@ g_clone:
     stmfd sp!, {r4, r5, r6, lr}
     ldmia r12, {r4, r5, r6}
     swi   \nr
-    stmfd sp!, {r4, r5, r6, pc}
+    ldmfd sp!, {r4, r5, r6, pc}
 .endm
 
 raw_syscall_easy g_open_raw,           __NR_open
 raw_syscall_easy g_read_raw,           __NR_read
 raw_syscall_easy g_write_raw,          __NR_write
+raw_syscall      g_mmap2_raw,          __NR_mmap2
+raw_syscall_easy g_munmap_raw,         __NR_munmap
+raw_syscall_easy g_ioctl_raw,          __NR_ioctl
+raw_syscall_easy g_close_raw,          __NR_close
+raw_syscall_easy g_chdir_raw,          __NR_chdir
 raw_syscall_easy g_futex_raw,          __NR_futex
 raw_syscall_easy g_nanosleep_raw,      __NR_nanosleep
 raw_syscall_easy g_clock_gettime_raw,  __NR_clock_gettime
 raw_syscall_easy g_rt_sigprocmask_raw, __NR_rt_sigprocmask
-
+raw_syscall_easy g_exit_group_raw,     __NR_exit_group
diff --git a/loader/syscalls.h b/loader/syscalls.h
index e82e0fa..9a91bd4 100644
--- a/loader/syscalls.h
+++ b/loader/syscalls.h
@@ -9,15 +9,24 @@ long g_syscall(long number, ...);
 // arg6 is func ptr, for convenience
 long g_clone(unsigned long flags, void *child_stack, ...);
 
-int  g_syscall_error(long kret);
+long g_syscall_error(long kret);
 
 // raw - no errno handling
 long g_open_raw(const char *pathname, int flags, ...);
 long g_read_raw(int fd, void *buf, size_t count);
 long g_write_raw(int fd, const void *buf, size_t count);
+long g_mmap2_raw(void *addr, size_t length, int prot, int flags,
+                 int fd, off_t offset);
+long g_munmap_raw(void *addr, size_t length);
+long g_ioctl_raw(int fd, unsigned long request, ...);
+long g_close_raw(int fd);
+long g_chdir_raw(const char *path);
 long g_futex_raw(int *uaddr, int op, int val,
                  const struct timespec *timeout);
 long g_nanosleep_raw(const struct timespec *req, struct timespec *rem);
 long g_clock_gettime_raw(int clk_id, const struct timespec *tp);
 long g_rt_sigprocmask_raw(int how, const void *set, void *oldset,
-                         size_t sigsetsize);
+                          size_t sigsetsize);
+long __attribute__((noreturn))
+     g_exit_group_raw(int status);
+