diff options
| -rw-r--r-- | arch/x86_64/ia32/sys_ia32.c | 4 | ||||
| -rw-r--r-- | fs/compat.c | 16 | ||||
| -rw-r--r-- | include/linux/compat.h | 2 | ||||
| -rw-r--r-- | include/linux/sysctl.h | 2 | ||||
| -rw-r--r-- | kernel/sysctl.c | 11 |
5 files changed, 32 insertions, 3 deletions
diff --git a/arch/x86_64/ia32/sys_ia32.c b/arch/x86_64/ia32/sys_ia32.c index f182b20858e..ee30557629d 100644 --- a/arch/x86_64/ia32/sys_ia32.c +++ b/arch/x86_64/ia32/sys_ia32.c @@ -514,7 +514,7 @@ int sys32_ni_syscall(int call) static char lastcomm[sizeof(me->comm)]; if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { - printk(KERN_INFO "IA32 syscall %d from %s not implemented\n", + compat_printk(KERN_INFO "IA32 syscall %d from %s not implemented\n", call, me->comm); strncpy(lastcomm, me->comm, sizeof(lastcomm)); } @@ -916,7 +916,7 @@ long sys32_vm86_warning(void) struct task_struct *me = current; static char lastcomm[sizeof(me->comm)]; if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { - printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n", + compat_printk(KERN_INFO "%s: vm86 mode not supported on 64 bit kernel\n", me->comm); strncpy(lastcomm, me->comm, sizeof(lastcomm)); } diff --git a/fs/compat.c b/fs/compat.c index 7e7e5bc4f3c..e31e9cf9664 100644 --- a/fs/compat.c +++ b/fs/compat.c @@ -55,6 +55,20 @@ extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat); +int compat_log = 1; + +int compat_printk(const char *fmt, ...) +{ + va_list ap; + int ret; + if (!compat_log) + return 0; + va_start(ap, fmt); + ret = vprintk(fmt, ap); + va_end(ap); + return ret; +} + /* * Not all architectures have sys_utime, so implement this in terms * of sys_utimes. @@ -359,7 +373,7 @@ static void compat_ioctl_error(struct file *filp, unsigned int fd, sprintf(buf,"'%c'", (cmd>>24) & 0x3f); if (!isprint(buf[1])) sprintf(buf, "%02x", buf[1]); - printk("ioctl32(%s:%d): Unknown cmd fd(%d) " + compat_printk("ioctl32(%s:%d): Unknown cmd fd(%d) " "cmd(%08x){%s} arg(%08x) on %s\n", current->comm, current->pid, (int)fd, (unsigned int)cmd, buf, diff --git a/include/linux/compat.h b/include/linux/compat.h index dda1697ec75..9760753e662 100644 --- a/include/linux/compat.h +++ b/include/linux/compat.h @@ -226,5 +226,7 @@ static inline int compat_timespec_compare(struct compat_timespec *lhs, asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp); +extern int compat_printk(const char *fmt, ...); + #endif /* CONFIG_COMPAT */ #endif /* _LINUX_COMPAT_H */ diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h index 6a60770984e..349ef908a22 100644 --- a/include/linux/sysctl.h +++ b/include/linux/sysctl.h @@ -148,9 +148,11 @@ enum KERN_SPIN_RETRY=70, /* int: number of spinlock retries */ KERN_ACPI_VIDEO_FLAGS=71, /* int: flags for setting up video after ACPI sleep */ KERN_IA64_UNALIGNED=72, /* int: ia64 unaligned userland trap enable */ + KERN_COMPAT_LOG=73, /* int: print compat layer messages */ }; + /* CTL_VM names: */ enum { diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 2c0e6581944..f1a4eb1a655 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -73,6 +73,7 @@ extern int printk_ratelimit_burst; extern int pid_max_min, pid_max_max; extern int sysctl_drop_caches; extern int percpu_pagelist_fraction; +extern int compat_log; #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) int unknown_nmi_panic; @@ -677,6 +678,16 @@ static ctl_table kern_table[] = { .proc_handler = &proc_dointvec, }, #endif +#ifdef CONFIG_COMPAT + { + .ctl_name = KERN_COMPAT_LOG, + .procname = "compat-log", + .data = &compat_log, + .maxlen = sizeof (int), + .mode = 0644, + .proc_handler = &proc_dointvec, + }, +#endif { .ctl_name = 0 } }; |