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Subject[PATCH 2/6] generic sys_old_mmap
Add a generic implementation of the old mmap syscall, which expects it's
argument in a memory block and switch all architectures over to use it.


Signed-off-by: Christoph Hellwig <hch@lst.de>
Index: linux-2.6/include/linux/syscalls.h
===================================================================
--- linux-2.6.orig/include/linux/syscalls.h 2010-01-30 11:26:47.622005911 +0100
+++ linux-2.6/include/linux/syscalls.h 2010-01-30 22:40:36.125003257 +0100
@@ -23,6 +23,7 @@ struct kexec_segment;
struct linux_dirent;
struct linux_dirent64;
struct list_head;
+struct mmap_arg_struct;
struct msgbuf;
struct msghdr;
struct mmsghdr;
@@ -838,4 +839,6 @@ asmlinkage long sys_perf_event_open(
asmlinkage long sys_mmap_pgoff(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags,
unsigned long fd, unsigned long pgoff);
+asmlinkage long sys_old_mmap(struct mmap_arg_struct __user *arg);
+
#endif
Index: linux-2.6/mm/mmap.c
===================================================================
--- linux-2.6.orig/mm/mmap.c 2010-01-30 11:25:52.664004514 +0100
+++ linux-2.6/mm/mmap.c 2010-01-30 11:26:48.281004165 +0100
@@ -1083,6 +1083,30 @@ out:
return retval;
}

+#ifdef __ARCH_WANT_SYS_OLD_MMAP
+struct mmap_arg_struct {
+ unsigned long addr;
+ unsigned long len;
+ unsigned long prot;
+ unsigned long flags;
+ unsigned long fd;
+ unsigned long offset;
+};
+
+SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg)
+{
+ struct mmap_arg_struct a;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ return -EFAULT;
+ if (a.offset & ~PAGE_MASK)
+ return -EINVAL;
+
+ return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+ a.offset >> PAGE_SHIFT);
+}
+#endif /* __ARCH_WANT_SYS_OLD_MMAP */
+
/*
* Some shared mappigns will want the pages marked read-only
* to track write events. If so, we'll downgrade vm_page_prot
Index: linux-2.6/arch/arm/include/asm/unistd.h
===================================================================
--- linux-2.6.orig/arch/arm/include/asm/unistd.h 2010-01-30 11:26:47.558043975 +0100
+++ linux-2.6/arch/arm/include/asm/unistd.h 2010-01-30 22:40:35.710253641 +0100
@@ -443,6 +443,7 @@
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
#define __ARCH_WANT_SYS_RT_SIGSUSPEND
+#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLD_SELECT

#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
Index: linux-2.6/arch/arm/kernel/calls.S
===================================================================
--- linux-2.6.orig/arch/arm/kernel/calls.S 2010-01-30 11:26:47.550273407 +0100
+++ linux-2.6/arch/arm/kernel/calls.S 2010-01-30 11:26:48.304006959 +0100
@@ -99,7 +99,7 @@
CALL(sys_swapon)
CALL(sys_reboot)
CALL(OBSOLETE(sys_old_readdir)) /* used by libc4 */
-/* 90 */ CALL(OBSOLETE(old_mmap)) /* used by libc4 */
+/* 90 */ CALL(OBSOLETE(sys_old_mmap)) /* used by libc4 */
CALL(sys_munmap)
CALL(sys_truncate)
CALL(sys_ftruncate)
Index: linux-2.6/arch/arm/kernel/sys_arm.c
===================================================================
--- linux-2.6.orig/arch/arm/kernel/sys_arm.c 2010-01-30 11:26:47.626283114 +0100
+++ linux-2.6/arch/arm/kernel/sys_arm.c 2010-01-30 22:40:35.687254688 +0100
@@ -28,32 +28,6 @@
#include <linux/ipc.h>
#include <linux/uaccess.h>

-struct mmap_arg_struct {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
-{
- int error = -EFAULT;
- struct mmap_arg_struct a;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- error = -EINVAL;
- if (a.offset & ~PAGE_MASK)
- goto out;
-
- error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
-out:
- return error;
-}
-
#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT)
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
Index: linux-2.6/arch/cris/arch-v10/kernel/entry.S
===================================================================
--- linux-2.6.orig/arch/cris/arch-v10/kernel/entry.S 2010-01-30 11:25:52.613023720 +0100
+++ linux-2.6/arch/cris/arch-v10/kernel/entry.S 2010-01-30 11:26:48.312256156 +0100
@@ -692,7 +692,7 @@ sys_call_table:
.long sys_swapon
.long sys_reboot
.long sys_old_readdir
- .long old_mmap /* 90 */
+ .long sys_old_mmap /* 90 */
.long sys_munmap
.long sys_truncate
.long sys_ftruncate
Index: linux-2.6/arch/cris/arch-v32/kernel/entry.S
===================================================================
--- linux-2.6.orig/arch/cris/arch-v32/kernel/entry.S 2010-01-30 11:25:52.600004374 +0100
+++ linux-2.6/arch/cris/arch-v32/kernel/entry.S 2010-01-30 11:26:48.319255527 +0100
@@ -615,7 +615,7 @@ sys_call_table:
.long sys_swapon
.long sys_reboot
.long sys_old_readdir
- .long old_mmap /* 90 */
+ .long sys_old_mmap /* 90 */
.long sys_munmap
.long sys_truncate
.long sys_ftruncate
Index: linux-2.6/arch/cris/include/asm/unistd.h
===================================================================
--- linux-2.6.orig/arch/cris/include/asm/unistd.h 2010-01-30 11:25:52.589004863 +0100
+++ linux-2.6/arch/cris/include/asm/unistd.h 2010-01-30 22:40:35.732262022 +0100
@@ -364,6 +364,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
Index: linux-2.6/arch/cris/kernel/sys_cris.c
===================================================================
--- linux-2.6.orig/arch/cris/kernel/sys_cris.c 2010-01-30 11:25:52.578013244 +0100
+++ linux-2.6/arch/cris/kernel/sys_cris.c 2010-01-30 22:40:35.721253920 +0100
@@ -26,24 +26,6 @@
#include <asm/uaccess.h>
#include <asm/segment.h>

-asmlinkage unsigned long old_mmap(unsigned long __user *args)
-{
- unsigned long buffer[6];
- int err = -EFAULT;
-
- if (copy_from_user(&buffer, args, sizeof(buffer)))
- goto out;
-
- err = -EINVAL;
- if (buffer[5] & ~PAGE_MASK) /* verify that offset is on page boundary */
- goto out;
-
- err = sys_mmap_pgoff(buffer[0], buffer[1], buffer[2], buffer[3],
- buffer[4], buffer[5] >> PAGE_SHIFT);
-out:
- return err;
-}
-
asmlinkage long
sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, unsigned long pgoff)
Index: linux-2.6/arch/h8300/include/asm/unistd.h
===================================================================
--- linux-2.6.orig/arch/h8300/include/asm/unistd.h 2010-01-30 11:26:47.560025328 +0100
+++ linux-2.6/arch/h8300/include/asm/unistd.h 2010-01-30 22:40:36.097253082 +0100
@@ -348,6 +348,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLD_SELECT
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
Index: linux-2.6/arch/h8300/kernel/sys_h8300.c
===================================================================
--- linux-2.6.orig/arch/h8300/kernel/sys_h8300.c 2010-01-30 11:26:47.628255457 +0100
+++ linux-2.6/arch/h8300/kernel/sys_h8300.c 2010-01-30 22:40:36.087274104 +0100
@@ -27,40 +27,6 @@
#include <asm/unistd.h>

/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
- * handle more than 4 system call parameters, so these system calls
- * used a memory block for parameter passing..
- */
-
-struct mmap_arg_struct {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-asmlinkage int old_mmap(struct mmap_arg_struct *arg)
-{
- struct mmap_arg_struct a;
- int error = -EFAULT;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- error = -EINVAL;
- if (a.offset & ~PAGE_MASK)
- goto out;
-
- error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
- a.offset >> PAGE_SHIFT);
-out:
- return error;
-}
-
-/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
Index: linux-2.6/arch/h8300/kernel/syscalls.S
===================================================================
--- linux-2.6.orig/arch/h8300/kernel/syscalls.S 2010-01-30 11:26:47.606032381 +0100
+++ linux-2.6/arch/h8300/kernel/syscalls.S 2010-01-30 11:26:48.332256086 +0100
@@ -104,7 +104,7 @@ SYMBOL_NAME_LABEL(sys_call_table)
.long SYMBOL_NAME(sys_swapon)
.long SYMBOL_NAME(sys_reboot)
.long SYMBOL_NAME(sys_old_readdir)
- .long SYMBOL_NAME(old_mmap) /* 90 */
+ .long SYMBOL_NAME(sys_old_mmap) /* 90 */
.long SYMBOL_NAME(sys_munmap)
.long SYMBOL_NAME(sys_truncate)
.long SYMBOL_NAME(sys_ftruncate)
Index: linux-2.6/arch/m68k/kernel/entry.S
===================================================================
--- linux-2.6.orig/arch/m68k/kernel/entry.S 2010-01-30 11:26:47.551273616 +0100
+++ linux-2.6/arch/m68k/kernel/entry.S 2010-01-30 11:26:48.335256016 +0100
@@ -518,7 +518,7 @@ sys_call_table:
.long sys_swapon
.long sys_reboot
.long sys_old_readdir
- .long old_mmap /* 90 */
+ .long sys_old_mmap /* 90 */
.long sys_munmap
.long sys_truncate
.long sys_ftruncate
Index: linux-2.6/arch/m68k/kernel/sys_m68k.c
===================================================================
--- linux-2.6.orig/arch/m68k/kernel/sys_m68k.c 2010-01-30 11:26:47.629267190 +0100
+++ linux-2.6/arch/m68k/kernel/sys_m68k.c 2010-01-30 22:40:35.789004793 +0100
@@ -42,40 +42,6 @@ asmlinkage long sys_mmap2(unsigned long
}

/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
- * handle more than 4 system call parameters, so these system calls
- * used a memory block for parameter passing..
- */
-
-struct mmap_arg_struct {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
-{
- struct mmap_arg_struct a;
- int error = -EFAULT;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- error = -EINVAL;
- if (a.offset & ~PAGE_MASK)
- goto out;
-
- error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
- a.offset >> PAGE_SHIFT);
-out:
- return error;
-}
-
-/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
Index: linux-2.6/arch/m68knommu/kernel/sys_m68k.c
===================================================================
--- linux-2.6.orig/arch/m68knommu/kernel/sys_m68k.c 2010-01-30 11:26:47.634256434 +0100
+++ linux-2.6/arch/m68knommu/kernel/sys_m68k.c 2010-01-30 22:40:36.115253222 +0100
@@ -28,40 +28,6 @@
#include <asm/unistd.h>

/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux/m68k cloned Linux/i386, which didn't use to be able to
- * handle more than 4 system call parameters, so these system calls
- * used a memory block for parameter passing..
- */
-
-struct mmap_arg_struct {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-asmlinkage int old_mmap(struct mmap_arg_struct *arg)
-{
- struct mmap_arg_struct a;
- int error = -EFAULT;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- error = -EINVAL;
- if (a.offset & ~PAGE_MASK)
- goto out;
-
- error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
- a.offset >> PAGE_SHIFT);
-out:
- return error;
-}
-
-/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
Index: linux-2.6/arch/m68knommu/kernel/syscalltable.S
===================================================================
--- linux-2.6.orig/arch/m68knommu/kernel/syscalltable.S 2010-01-30 11:26:47.553274454 +0100
+++ linux-2.6/arch/m68knommu/kernel/syscalltable.S 2010-01-30 11:26:48.341285210 +0100
@@ -108,7 +108,7 @@ ENTRY(sys_call_table)
.long sys_ni_syscall /* sys_swapon */
.long sys_reboot
.long sys_old_readdir
- .long old_mmap /* 90 */
+ .long sys_old_mmap /* 90 */
.long sys_munmap
.long sys_truncate
.long sys_ftruncate
Index: linux-2.6/arch/m68k/include/asm/unistd.h
===================================================================
--- linux-2.6.orig/arch/m68k/include/asm/unistd.h 2010-01-30 11:26:47.565005702 +0100
+++ linux-2.6/arch/m68k/include/asm/unistd.h 2010-01-30 22:40:35.806003606 +0100
@@ -359,6 +359,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLD_SELECT
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
Index: linux-2.6/arch/s390/kernel/sys_s390.c
===================================================================
--- linux-2.6.orig/arch/s390/kernel/sys_s390.c 2010-01-30 11:25:52.457275362 +0100
+++ linux-2.6/arch/s390/kernel/sys_s390.c 2010-01-30 22:40:35.921004723 +0100
@@ -33,13 +33,12 @@
#include "entry.h"

/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux for S/390 isn't able to handle more than 5
- * system call parameters, so these system calls used a memory
- * block for parameter passing..
+ * Perform the mmap() system call. Linux for S/390 isn't able to handle more
+ * than 5 system call parameters, so this system call uses a memory block
+ * for parameter passing.
*/

-struct mmap_arg_struct {
+struct s390_mmap_arg_struct {
unsigned long addr;
unsigned long len;
unsigned long prot;
@@ -48,9 +47,9 @@ struct mmap_arg_struct {
unsigned long offset;
};

-SYSCALL_DEFINE1(mmap2, struct mmap_arg_struct __user *, arg)
+SYSCALL_DEFINE1(mmap2, struct s390_mmap_arg_struct __user *, arg)
{
- struct mmap_arg_struct a;
+ struct s390_mmap_arg_struct a;
int error = -EFAULT;

if (copy_from_user(&a, arg, sizeof(a)))
@@ -60,23 +59,6 @@ out:
return error;
}

-SYSCALL_DEFINE1(s390_old_mmap, struct mmap_arg_struct __user *, arg)
-{
- struct mmap_arg_struct a;
- long error = -EFAULT;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- error = -EINVAL;
- if (a.offset & ~PAGE_MASK)
- goto out;
-
- error = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
-out:
- return error;
-}
-
/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
Index: linux-2.6/arch/s390/kernel/syscalls.S
===================================================================
--- linux-2.6.orig/arch/s390/kernel/syscalls.S 2010-01-30 11:25:52.466254409 +0100
+++ linux-2.6/arch/s390/kernel/syscalls.S 2010-01-30 22:40:35.932003815 +0100
@@ -98,7 +98,7 @@ SYSCALL(sys_uselib,sys_uselib,sys32_usel
SYSCALL(sys_swapon,sys_swapon,sys32_swapon_wrapper)
SYSCALL(sys_reboot,sys_reboot,sys32_reboot_wrapper)
SYSCALL(sys_ni_syscall,sys_ni_syscall,old32_readdir_wrapper) /* old readdir syscall */
-SYSCALL(sys_s390_old_mmap,sys_s390_old_mmap,old32_mmap_wrapper) /* 90 */
+SYSCALL(sys_old_mmap,sys_old_mmap,old32_mmap_wrapper) /* 90 */
SYSCALL(sys_munmap,sys_munmap,sys32_munmap_wrapper)
SYSCALL(sys_truncate,sys_truncate,sys32_truncate_wrapper)
SYSCALL(sys_ftruncate,sys_ftruncate,sys32_ftruncate_wrapper)
Index: linux-2.6/arch/s390/kernel/entry.h
===================================================================
--- linux-2.6.orig/arch/s390/kernel/entry.h 2010-01-30 11:26:47.648282625 +0100
+++ linux-2.6/arch/s390/kernel/entry.h 2010-01-30 22:40:35.911007307 +0100
@@ -25,12 +25,11 @@ void __init startup_init(void);
void die(const char * str, struct pt_regs * regs, long err);

struct new_utsname;
-struct mmap_arg_struct;
+struct s390_mmap_arg_struct;
struct fadvise64_64_args;
struct old_sigaction;

-long sys_mmap2(struct mmap_arg_struct __user *arg);
-long sys_s390_old_mmap(struct mmap_arg_struct __user *arg);
+long sys_mmap2(struct s390_mmap_arg_struct __user *arg);
long sys_ipc(uint call, int first, unsigned long second,
unsigned long third, void __user *ptr);
long sys_s390_newuname(struct new_utsname __user *name);
Index: linux-2.6/arch/s390/include/asm/unistd.h
===================================================================
--- linux-2.6.orig/arch/s390/include/asm/unistd.h 2010-01-30 11:25:52.446004304 +0100
+++ linux-2.6/arch/s390/include/asm/unistd.h 2010-01-30 11:26:48.351264327 +0100
@@ -392,6 +392,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
Index: linux-2.6/arch/x86/include/asm/syscalls.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/syscalls.h 2010-01-30 11:26:47.639283952 +0100
+++ linux-2.6/arch/x86/include/asm/syscalls.h 2010-01-30 22:40:36.048253431 +0100
@@ -51,11 +51,9 @@ asmlinkage int sys_sigaction(int, const
unsigned long sys_sigreturn(struct pt_regs *);

/* kernel/sys_i386_32.c */
-struct mmap_arg_struct;
struct oldold_utsname;
struct old_utsname;

-asmlinkage int old_mmap(struct mmap_arg_struct __user *);
asmlinkage int sys_ipc(uint, int, int, int, void __user *, long);
asmlinkage int sys_uname(struct old_utsname __user *);
asmlinkage int sys_olduname(struct oldold_utsname __user *);
Index: linux-2.6/arch/x86/kernel/sys_i386_32.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/sys_i386_32.c 2010-01-30 11:26:47.641268727 +0100
+++ linux-2.6/arch/x86/kernel/sys_i386_32.c 2010-01-30 22:40:36.072254479 +0100
@@ -25,40 +25,6 @@
#include <asm/syscalls.h>

/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux/i386 didn't use to be able to handle more than
- * 4 system call parameters, so these system calls used a memory
- * block for parameter passing..
- */
-
-struct mmap_arg_struct {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-asmlinkage int old_mmap(struct mmap_arg_struct __user *arg)
-{
- struct mmap_arg_struct a;
- int err = -EFAULT;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- err = -EINVAL;
- if (a.offset & ~PAGE_MASK)
- goto out;
-
- err = sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags,
- a.fd, a.offset >> PAGE_SHIFT);
-out:
- return err;
-}
-
-/*
* sys_ipc() is the de-multiplexer for the SysV IPC calls..
*
* This is really horribly ugly.
Index: linux-2.6/arch/x86/kernel/syscall_table_32.S
===================================================================
--- linux-2.6.orig/arch/x86/kernel/syscall_table_32.S 2010-01-30 11:26:47.555004026 +0100
+++ linux-2.6/arch/x86/kernel/syscall_table_32.S 2010-01-30 11:26:48.363282766 +0100
@@ -89,7 +89,7 @@ ENTRY(sys_call_table)
.long sys_swapon
.long sys_reboot
.long sys_old_readdir
- .long old_mmap /* 90 */
+ .long sys_old_mmap /* 90 */
.long sys_munmap
.long sys_truncate
.long sys_ftruncate
Index: linux-2.6/arch/ia64/ia32/sys_ia32.c
===================================================================
--- linux-2.6.orig/arch/ia64/ia32/sys_ia32.c 2010-01-30 11:26:47.578006051 +0100
+++ linux-2.6/arch/ia64/ia32/sys_ia32.c 2010-01-30 22:40:34.128273477 +0100
@@ -883,7 +883,7 @@ ia32_do_mmap (struct file *file, unsigne
* system calls used a memory block for parameter passing..
*/

-struct mmap_arg_struct {
+struct mmap_arg_struct32 {
unsigned int addr;
unsigned int len;
unsigned int prot;
@@ -893,9 +893,9 @@ struct mmap_arg_struct {
};

asmlinkage long
-sys32_mmap (struct mmap_arg_struct __user *arg)
+sys32_mmap (struct mmap_arg_struct32 __user *arg)
{
- struct mmap_arg_struct a;
+ struct mmap_arg_struct32 a;
struct file *file = NULL;
unsigned long addr;
int flags;
Index: linux-2.6/arch/um/sys-i386/shared/sysdep/syscalls.h
===================================================================
--- linux-2.6.orig/arch/um/sys-i386/shared/sysdep/syscalls.h 2010-01-30 11:25:52.336256364 +0100
+++ linux-2.6/arch/um/sys-i386/shared/sysdep/syscalls.h 2010-01-30 11:26:48.387255876 +0100
@@ -13,8 +13,6 @@ typedef long syscall_handler_t(struct pt
*/
extern syscall_handler_t sys_rt_sigaction;

-extern syscall_handler_t old_mmap_i386;
-
extern syscall_handler_t *sys_call_table[];

#define EXECUTE_SYSCALL(syscall, regs) \
Index: linux-2.6/arch/um/sys-i386/sys_call_table.S
===================================================================
--- linux-2.6.orig/arch/um/sys-i386/sys_call_table.S 2010-01-30 11:25:52.360004444 +0100
+++ linux-2.6/arch/um/sys-i386/sys_call_table.S 2010-01-30 11:26:48.390256714 +0100
@@ -7,7 +7,7 @@
#define sys_vm86old sys_ni_syscall
#define sys_vm86 sys_ni_syscall

-#define old_mmap old_mmap_i386
+#define old_mmap sys_old_mmap

#define ptregs_fork sys_fork
#define ptregs_execve sys_execve
Index: linux-2.6/arch/um/sys-i386/syscalls.c
===================================================================
--- linux-2.6.orig/arch/um/sys-i386/syscalls.c 2010-01-30 11:26:47.650256295 +0100
+++ linux-2.6/arch/um/sys-i386/syscalls.c 2010-01-30 22:40:36.029003955 +0100
@@ -12,39 +12,6 @@
#include "asm/unistd.h"

/*
- * Perform the select(nd, in, out, ex, tv) and mmap() system
- * calls. Linux/i386 didn't use to be able to handle more than
- * 4 system call parameters, so these system calls used a memory
- * block for parameter passing..
- */
-
-struct mmap_arg_struct {
- unsigned long addr;
- unsigned long len;
- unsigned long prot;
- unsigned long flags;
- unsigned long fd;
- unsigned long offset;
-};
-
-extern int old_mmap(unsigned long addr, unsigned long len,
- unsigned long prot, unsigned long flags,
- unsigned long fd, unsigned long offset);
-
-long old_mmap_i386(struct mmap_arg_struct __user *arg)
-{
- struct mmap_arg_struct a;
- int err = -EFAULT;
-
- if (copy_from_user(&a, arg, sizeof(a)))
- goto out;
-
- err = old_mmap(a.addr, a.len, a.prot, a.flags, a.fd, a.offset);
- out:
- return err;
-}
-
-/*
* The prototype on i386 is:
*
* int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls, int * child_tidptr)
Index: linux-2.6/arch/x86/ia32/sys_ia32.c
===================================================================
--- linux-2.6.orig/arch/x86/ia32/sys_ia32.c 2010-01-30 11:26:47.594032311 +0100
+++ linux-2.6/arch/x86/ia32/sys_ia32.c 2010-01-30 22:40:34.317005004 +0100
@@ -143,7 +143,7 @@ asmlinkage long sys32_fstatat(unsigned i
* block for parameter passing..
*/

-struct mmap_arg_struct {
+struct mmap_arg_struct32 {
unsigned int addr;
unsigned int len;
unsigned int prot;
@@ -152,9 +152,9 @@ struct mmap_arg_struct {
unsigned int offset;
};

-asmlinkage long sys32_mmap(struct mmap_arg_struct __user *arg)
+asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
{
- struct mmap_arg_struct a;
+ struct mmap_arg_struct32 a;

if (copy_from_user(&a, arg, sizeof(a)))
return -EFAULT;
Index: linux-2.6/arch/x86/include/asm/sys_ia32.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/sys_ia32.h 2010-01-30 11:26:47.557010172 +0100
+++ linux-2.6/arch/x86/include/asm/sys_ia32.h 2010-01-30 22:40:34.329004165 +0100
@@ -26,8 +26,8 @@ asmlinkage long sys32_lstat64(char __use
asmlinkage long sys32_fstat64(unsigned int, struct stat64 __user *);
asmlinkage long sys32_fstatat(unsigned int, char __user *,
struct stat64 __user *, int);
-struct mmap_arg_struct;
-asmlinkage long sys32_mmap(struct mmap_arg_struct __user *);
+struct mmap_arg_struct32;
+asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *);
asmlinkage long sys32_mprotect(unsigned long, size_t, unsigned long);

struct sigaction32;
Index: linux-2.6/arch/x86/include/asm/unistd_32.h
===================================================================
--- linux-2.6.orig/arch/x86/include/asm/unistd_32.h 2010-01-30 11:26:47.570005073 +0100
+++ linux-2.6/arch/x86/include/asm/unistd_32.h 2010-01-30 22:40:36.059274174 +0100
@@ -366,6 +366,7 @@
#define __ARCH_WANT_SYS_LLSEEK
#define __ARCH_WANT_SYS_NICE
#define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLD_MMAP
#define __ARCH_WANT_SYS_OLD_SELECT
#define __ARCH_WANT_SYS_OLDUMOUNT
#define __ARCH_WANT_SYS_SIGPENDING
Index: linux-2.6/mm/nommu.c
===================================================================
--- linux-2.6.orig/mm/nommu.c 2010-01-30 22:41:08.020023511 +0100
+++ linux-2.6/mm/nommu.c 2010-01-30 22:42:03.685255736 +0100
@@ -1428,6 +1428,30 @@ out:
return retval;
}

+#ifdef __ARCH_WANT_SYS_OLD_MMAP
+struct mmap_arg_struct {
+ unsigned long addr;
+ unsigned long len;
+ unsigned long prot;
+ unsigned long flags;
+ unsigned long fd;
+ unsigned long offset;
+};
+
+SYSCALL_DEFINE1(old_mmap, struct mmap_arg_struct __user *, arg)
+{
+ struct mmap_arg_struct a;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ return -EFAULT;
+ if (a.offset & ~PAGE_MASK)
+ return -EINVAL;
+
+ return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
+ a.offset >> PAGE_SHIFT);
+}
+#endif /* __ARCH_WANT_SYS_OLD_MMAP */
+
/*
* split a vma into two pieces at address 'addr', a new vma is allocated either
* for the first part or the tail.

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