From: Riku Voipio <riku.voipio@iki.fi>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [PATCH] uselib, mincore and readahead syscalls
Date: Wed, 17 Sep 2008 22:45:42 +0300 [thread overview]
Message-ID: <20080917194542.GC21187@kos.to> (raw)
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These have been carried in Debian since forever. Added lock_user()
calls for mincore before submitting, I'm not sure if that's the correct
way?
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
--
"rm -rf" only sounds scary if you don't have backups
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Index: trunk/linux-user/syscall.c
===================================================================
--- trunk.orig/linux-user/syscall.c 2008-09-17 20:07:40.000000000 +0300
+++ trunk/linux-user/syscall.c 2008-09-17 21:43:47.000000000 +0300
@@ -276,6 +276,7 @@
extern int setfsuid(int);
extern int setfsgid(int);
extern int setgroups(int, gid_t *);
+extern int uselib(const char*);
#define ERRNO_TABLE_SIZE 1200
@@ -4226,7 +4227,13 @@
#endif
#ifdef TARGET_NR_uselib
case TARGET_NR_uselib:
- goto unimplemented;
+ {
+ if(!(p = lock_user_string(arg1)))
+ goto efault;
+ ret = get_errno(uselib(path(p)));
+ unlock_user(p, arg1, 0);
+ }
+ break;
#endif
#ifdef TARGET_NR_swapon
case TARGET_NR_swapon:
@@ -5512,7 +5519,18 @@
goto unimplemented;
#ifdef TARGET_NR_mincore
case TARGET_NR_mincore:
- goto unimplemented;
+ {
+ void *a;
+ if (!(a = lock_user(VERIFY_READ, arg1,arg2, 0)))
+ goto efault;
+ if (!(p = lock_user_string(arg3)))
+ goto mincore_fail;
+ ret = get_errno(mincore((void*)a, (size_t)arg2, (unsigned char*)p));
+ unlock_user(p, arg3, ret);
+ mincore_fail:
+ unlock_user(a, arg1, 0);
+ }
+ break;
#endif
#ifdef TARGET_NR_madvise
case TARGET_NR_madvise:
@@ -5652,7 +5670,8 @@
break;
#ifdef TARGET_NR_readahead
case TARGET_NR_readahead:
- goto unimplemented;
+ ret = get_errno(readahead((int)arg1, (off64_t)arg2, (size_t)arg3));
+ break;
#endif
#ifdef TARGET_NR_setxattr
case TARGET_NR_setxattr:
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next reply other threads:[~2008-09-17 19:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-17 19:45 Riku Voipio [this message]
2008-09-19 8:05 ` [Qemu-devel] [PATCH] uselib, mincore and readahead syscalls Kirill A. Shutemov
2008-09-19 11:37 ` Riku Voipio
2008-09-19 11:54 ` Kirill A. Shutemov
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