10 files changed, 90 insertions, 75 deletions

diff --git a/arch/um/include/mconsole.h b/arch/um/include/mconsole.h
index 58f67d391105..2666815b6af5 100644
--- a/arch/um/include/mconsole.h
+++ b/arch/um/include/mconsole.h
@@ -61,6 +61,7 @@ struct mc_request
 
         struct mconsole_request request;
         struct mconsole_command *cmd;
+        union uml_pt_regs regs;
 };
 
 extern char mconsole_socket_name[];
diff --git a/arch/um/include/mconsole_kern.h b/arch/um/include/mconsole_kern.h
index d0b690197fd7..1ea6d928e1cd 100644
--- a/arch/um/include/mconsole_kern.h
+++ b/arch/um/include/mconsole_kern.h
@@ -14,6 +14,7 @@ struct mconsole_entry {
         struct mc_request request;
 };
 
+/* All these methods are called in process context. */
 struct mc_device {
         struct list_head list;
         char *name;
diff --git a/arch/um/include/os.h b/arch/um/include/os.h
index 6516f6dca96d..13a86bd383d3 100644
--- a/arch/um/include/os.h
+++ b/arch/um/include/os.h
@@ -233,6 +233,8 @@ extern unsigned long __do_user_copy(void *to, const void *from, int n,
                                     void (*op)(void *to, const void *from,
                                                int n), int *faulted_out);
 
+/* execvp.c */
+extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
 /* helper.c */
 extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv,
                       unsigned long *stack_out);
diff --git a/arch/um/include/sysdep-i386/barrier.h b/arch/um/include/sysdep-i386/barrier.h
new file mode 100644
index 000000000000..b58d52c5b2f4
--- /dev/null
+++ b/arch/um/include/sysdep-i386/barrier.h
@@ -0,0 +1,9 @@
+#ifndef __SYSDEP_I386_BARRIER_H
+#define __SYSDEP_I386_BARRIER_H
+
+/* Copied from include/asm-i386 for use by userspace.  i386 has the option
+ * of using mfence, but I'm just using this, which works everywhere, for now.
+ */
+#define mb() asm volatile("lock; addl $0,0(%esp)")
+
+#endif
diff --git a/arch/um/include/sysdep-i386/checksum.h b/arch/um/include/sysdep-i386/checksum.h
index 052bb061a978..0cb4645cbeb8 100644
--- a/arch/um/include/sysdep-i386/checksum.h
+++ b/arch/um/include/sysdep-i386/checksum.h
@@ -20,8 +20,7 @@
  *
  * it's best to have buff aligned on a 32-bit boundary
  */
-unsigned int csum_partial(const unsigned char * buff, int len, 
-                          unsigned int sum);
+__wsum csum_partial(const void *buff, int len, __wsum sum);
 
 /*
  *      Note: when you get a NULL pointer exception here this means someone
@@ -32,8 +31,8 @@ unsigned int csum_partial(const unsigned char * buff, int len,
  */
 
 static __inline__
-unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst,
-                                       int len, int sum)
+__wsum csum_partial_copy_nocheck(const void *src, void *dst,
+                                       int len, __wsum sum)
 {
         memcpy(dst, src, len);
         return csum_partial(dst, len, sum);
@@ -48,36 +47,25 @@ unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *
  */
 
 static __inline__
-unsigned int csum_partial_copy_from_user(const unsigned char __user *src,
-                                         unsigned char *dst,
-                                         int len, int sum, int *err_ptr)
+__wsum csum_partial_copy_from_user(const void __user *src, void *dst,
+                                         int len, __wsum sum, int *err_ptr)
 {
-        if(copy_from_user(dst, src, len)){
+        if (copy_from_user(dst, src, len)) {
                 *err_ptr = -EFAULT;
-                return(-1);
+                return (__force __wsum)-1;
         }
 
         return csum_partial(dst, len, sum);
 }
 
 /*
- * These are the old (and unsafe) way of doing checksums, a warning message 
- * will be printed if they are used and an exception occurs.
- *
- * these functions should go away after some time.
- */
-
-#define csum_partial_copy_fromuser csum_partial_copy_from_user
-
-/*
  *      This is a version of ip_compute_csum() optimized for IP headers,
  *      which always checksum on 4 octet boundaries.
  *
  *      By Jorge Cwik <jorge@laser.satlink.net>, adapted for linux by
  *      Arnt Gulbrandsen.
  */
-static inline unsigned short ip_fast_csum(unsigned char * iph,
-                                          unsigned int ihl)
+static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
 {
         unsigned int sum;
 
@@ -105,29 +93,29 @@ static inline unsigned short ip_fast_csum(unsigned char * iph,
         : "=r" (sum), "=r" (iph), "=r" (ihl)
         : "1" (iph), "2" (ihl)
         : "memory");
-        return sum;
+        return (__force __sum16)sum;
 }
 
 /*
  *      Fold a partial checksum
  */
 
-static inline unsigned int csum_fold(unsigned int sum)
+static inline __sum16 csum_fold(__wsum sum)
 {
         __asm__(
                 "addl %1, %0            ;\n"
                 "adcl $0xffff, %0       ;\n"
                 : "=r" (sum)
-                : "r" (sum << 16), "0" (sum & 0xffff0000)
+                : "r" ((__force u32)sum << 16),
+                  "0" ((__force u32)sum & 0xffff0000)
         );
-        return (~sum) >> 16;
+        return (__force __sum16)(~(__force u32)sum >> 16);
 }
 
-static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
-                                                   unsigned long daddr,
+static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr,
                                                    unsigned short len,
                                                    unsigned short proto,
-                                                   unsigned int sum)
+                                                   __wsum sum)
 {
     __asm__(
         "addl %1, %0    ;\n"
@@ -135,7 +123,7 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
         "adcl %3, %0    ;\n"
         "adcl $0, %0    ;\n"
         : "=r" (sum)
-        : "g" (daddr), "g"(saddr), "g"((ntohs(len)<<16)+proto*256), "0"(sum));
+        : "g" (daddr), "g"(saddr), "g"((len + proto) << 8), "0"(sum));
     return sum;
 }
 
@@ -143,11 +131,10 @@ static inline unsigned long csum_tcpudp_nofold(unsigned long saddr,
  * computes the checksum of the TCP/UDP pseudo-header
  * returns a 16-bit checksum, already complemented
  */
-static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
-                                                   unsigned long daddr,
+static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
                                                    unsigned short len,
                                                    unsigned short proto,
-                                                   unsigned int sum)
+                                                   __wsum sum)
 {
         return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
 }
@@ -157,17 +144,16 @@ static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
  * in icmp.c
  */
 
-static inline unsigned short ip_compute_csum(unsigned char * buff, int len)
+static inline __sum16 ip_compute_csum(const void *buff, int len)
 {
     return csum_fold (csum_partial(buff, len, 0));
 }
 
 #define _HAVE_ARCH_IPV6_CSUM
-static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
-                                                     struct in6_addr *daddr,
-                                                     __u32 len,
-                                                     unsigned short proto,
-                                                     unsigned int sum)
+static __inline__ __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
+                                          const struct in6_addr *daddr,
+                                          __u32 len, unsigned short proto,
+                                          __wsum sum)
 {
         __asm__(
                 "addl 0(%1), %0         ;\n"
@@ -192,14 +178,14 @@ static __inline__ unsigned short int csum_ipv6_magic(struct in6_addr *saddr,
  *      Copy and checksum to user
  */
 #define HAVE_CSUM_COPY_USER
-static __inline__ unsigned int csum_and_copy_to_user(const unsigned char *src,
-                                                     unsigned char __user *dst,
-                                                     int len, int sum, int *err_ptr)
+static __inline__ __wsum csum_and_copy_to_user(const void *src,
+                                                     void __user *dst,
+                                                     int len, __wsum sum, int *err_ptr)
 {
-        if (access_ok(VERIFY_WRITE, dst, len)){
-                if(copy_to_user(dst, src, len)){
+        if (access_ok(VERIFY_WRITE, dst, len)) {
+                if (copy_to_user(dst, src, len)) {
                         *err_ptr = -EFAULT;
-                        return(-1);
+                        return (__force __wsum)-1;
                 }
 
                 return csum_partial(src, len, sum);
@@ -208,7 +194,7 @@ static __inline__ unsigned int csum_and_copy_to_user(const unsigned char *src,
         if (len)
                 *err_ptr = -EFAULT;
 
-        return -1; /* invalid checksum */
+        return (__force __wsum)-1; /* invalid checksum */
 }
 
 #endif
diff --git a/arch/um/include/sysdep-x86_64/barrier.h b/arch/um/include/sysdep-x86_64/barrier.h
new file mode 100644
index 000000000000..7b610befdc8f
--- /dev/null
+++ b/arch/um/include/sysdep-x86_64/barrier.h
@@ -0,0 +1,7 @@
+#ifndef __SYSDEP_X86_64_BARRIER_H
+#define __SYSDEP_X86_64_BARRIER_H
+
+/* Copied from include/asm-x86_64 for use by userspace. */
+#define mb()    asm volatile("mfence":::"memory")
+
+#endif
diff --git a/arch/um/include/sysdep-x86_64/checksum.h b/arch/um/include/sysdep-x86_64/checksum.h
index ea97005af694..a5be9031ea85 100644
--- a/arch/um/include/sysdep-x86_64/checksum.h
+++ b/arch/um/include/sysdep-x86_64/checksum.h
@@ -9,8 +9,7 @@
 #include "linux/in6.h"
 #include "asm/uaccess.h"
 
-extern unsigned csum_partial(const unsigned char *buff, unsigned len,
-                             unsigned sum);
+extern __wsum csum_partial(const void *buff, int len, __wsum sum);
 
 /*
  *      Note: when you get a NULL pointer exception here this means someone
@@ -21,21 +20,21 @@ extern unsigned csum_partial(const unsigned char *buff, unsigned len,
  */
 
 static __inline__
-unsigned int csum_partial_copy_nocheck(const unsigned char *src, unsigned char *dst,
-                                       int len, int sum)
+__wsum csum_partial_copy_nocheck(const void *src, void *dst,
+                                       int len, __wsum sum)
 {
         memcpy(dst, src, len);
         return(csum_partial(dst, len, sum));
 }
 
 static __inline__
-unsigned int csum_partial_copy_from_user(const unsigned char *src,
-                                         unsigned char *dst, int len, int sum,
+__wsum csum_partial_copy_from_user(const void __user *src,
+                                         void *dst, int len, __wsum sum,
                                          int *err_ptr)
 {
-        if(copy_from_user(dst, src, len)){
+        if (copy_from_user(dst, src, len)) {
                 *err_ptr = -EFAULT;
-                return(-1);
+                return (__force __wsum)-1;
         }
         return csum_partial(dst, len, sum);
 }
@@ -48,15 +47,16 @@ unsigned int csum_partial_copy_from_user(const unsigned char *src,
  * the last step before putting a checksum into a packet.
  * Make sure not to mix with 64bit checksums.
  */
-static inline unsigned int csum_fold(unsigned int sum)
+static inline __sum16 csum_fold(__wsum sum)
 {
         __asm__(
                 "  addl %1,%0\n"
                 "  adcl $0xffff,%0"
                 : "=r" (sum)
-                : "r" (sum << 16), "0" (sum & 0xffff0000)
+                : "r" ((__force u32)sum << 16),
+                  "0" ((__force u32)sum & 0xffff0000)
         );
-        return (~sum) >> 16;
+        return (__force __sum16)(~(__force u32)sum >> 16);
 }
 
 /**
@@ -70,28 +70,27 @@ static inline unsigned int csum_fold(unsigned int sum)
  * Returns the pseudo header checksum the input data. Result is
  * 32bit unfolded.
  */
-static inline unsigned long
-csum_tcpudp_nofold(unsigned saddr, unsigned daddr, unsigned short len,
-                   unsigned short proto, unsigned int sum)
+static inline __wsum
+csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len,
+                   unsigned short proto, __wsum sum)
 {
         asm("  addl %1, %0\n"
             "  adcl %2, %0\n"
             "  adcl %3, %0\n"
             "  adcl $0, %0\n"
                 : "=r" (sum)
-            : "g" (daddr), "g" (saddr), "g" ((ntohs(len)<<16)+proto*256), "0" (sum));
-    return sum;
+            : "g" (daddr), "g" (saddr), "g" ((len + proto) << 8), "0" (sum));
+        return sum;
 }
 
 /*
  * computes the checksum of the TCP/UDP pseudo-header
  * returns a 16-bit checksum, already complemented
  */
-static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
-                                                   unsigned long daddr,
-                                                   unsigned short len,
-                                                   unsigned short proto,
-                                                   unsigned int sum)
+static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
+                                           unsigned short len,
+                                           unsigned short proto,
+                                           __wsum sum)
 {
         return csum_fold(csum_tcpudp_nofold(saddr,daddr,len,proto,sum));
 }
@@ -101,7 +100,7 @@ static inline unsigned short int csum_tcpudp_magic(unsigned long saddr,
  * iph: ipv4 header
  * ihl: length of header / 4
  */
-static inline unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl)
+static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
 {
         unsigned int sum;
 
@@ -128,7 +127,7 @@ static inline unsigned short ip_fast_csum(unsigned char *iph, unsigned int ihl)
         : "=r" (sum), "=r" (iph), "=r" (ihl)
         : "1" (iph), "2" (ihl)
         : "memory");
-        return(sum);
+        return (__force __sum16)sum;
 }
 
 static inline unsigned add32_with_carry(unsigned a, unsigned b)
@@ -140,6 +139,6 @@ static inline unsigned add32_with_carry(unsigned a, unsigned b)
         return a;
 }
 
-extern unsigned short ip_compute_csum(unsigned char * buff, int len);
+extern __sum16 ip_compute_csum(const void *buff, int len);
 
 #endif
diff --git a/arch/um/include/um_malloc.h b/arch/um/include/um_malloc.h
new file mode 100644
index 000000000000..0363a9b53f8d
--- /dev/null
+++ b/arch/um/include/um_malloc.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2005 Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_MALLOC_H__
+#define __UM_MALLOC_H__
+
+extern void *um_kmalloc(int size);
+extern void *um_kmalloc_atomic(int size);
+extern void kfree(const void *ptr);
+
+extern void *um_vmalloc(int size);
+extern void *um_vmalloc_atomic(int size);
+extern void vfree(void *ptr);
+
+#endif /* __UM_MALLOC_H__ */
diff --git a/arch/um/include/user.h b/arch/um/include/user.h
index 39f8c8801076..acadce3f271f 100644
--- a/arch/um/include/user.h
+++ b/arch/um/include/user.h
@@ -11,17 +11,11 @@ extern void panic(const char *fmt, ...)
 extern int printk(const char *fmt, ...)
         __attribute__ ((format (printf, 1, 2)));
 extern void schedule(void);
-extern void *um_kmalloc(int size);
-extern void *um_kmalloc_atomic(int size);
-extern void kfree(void *ptr);
 extern int in_aton(char *str);
 extern int open_gdb_chan(void);
 /* These use size_t, however unsigned long is correct on both i386 and x86_64. */
 extern unsigned long strlcpy(char *, const char *, unsigned long);
 extern unsigned long strlcat(char *, const char *, unsigned long);
-extern void *um_vmalloc(int size);
-extern void *um_vmalloc_atomic(int size);
-extern void vfree(void *ptr);
 
 #endif
 
diff --git a/arch/um/include/user_util.h b/arch/um/include/user_util.h
index 802d7842514d..06625fefef33 100644
--- a/arch/um/include/user_util.h
+++ b/arch/um/include/user_util.h
@@ -52,7 +52,6 @@ extern int linux_main(int argc, char **argv);
 extern void set_cmdline(char *cmd);
 extern void input_cb(void (*proc)(void *), void *arg, int arg_len);
 extern int get_pty(void);
-extern void *um_kmalloc(int size);
 extern int switcheroo(int fd, int prot, void *from, void *to, int size);
 extern void do_exec(int old_pid, int new_pid);
 extern void tracer_panic(char *msg, ...)