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kexec/compat: convert to COMPAT_SYSCALL_DEFINE with changing parameter types 

In order to allow the COMPAT_SYSCALL_DEFINE macro generate code that
performs proper zero and sign extension convert all 64 bit parameters
to their corresponding 32 bit compat counterparts.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
hifive-unleashed-5.1
Heiko Carstens 2014-03-04 17:13:42 +01:00
parent 3a49a0f718
commit ca2c405ab9
3 changed files with 7 additions and 13 deletions
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6
include/linux/compat.h
View File

@ -641,10 +641,10 @@ asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
u32 val3);
asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
char __user *optval, int __user *optlen);
asmlinkage long compat_sys_kexec_load(unsigned long entry,
unsigned long nr_segments,
asmlinkage long compat_sys_kexec_load(compat_ulong_t entry,
compat_ulong_t nr_segments,
struct compat_kexec_segment __user *,
unsigned long flags);
compat_ulong_t flags);
asmlinkage long compat_sys_mq_getsetattr(mqd_t mqdes,
const struct compat_mq_attr __user *u_mqstat,
struct compat_mq_attr __user *u_omqstat);

6
include/linux/kexec.h
View File

@ -127,12 +127,6 @@ extern asmlinkage long sys_kexec_load(unsigned long entry,
struct kexec_segment __user *segments,
unsigned long flags);
extern int kernel_kexec(void);
#ifdef CONFIG_COMPAT
extern asmlinkage long compat_sys_kexec_load(unsigned long entry,
unsigned long nr_segments,
struct compat_kexec_segment __user *segments,
unsigned long flags);
#endif
extern struct page *kimage_alloc_control_pages(struct kimage *image,
unsigned int order);
extern void crash_kexec(struct pt_regs *);

8
kernel/kexec.c
View File

@ -1039,10 +1039,10 @@ void __weak crash_unmap_reserved_pages(void)
{}
#ifdef CONFIG_COMPAT
asmlinkage long compat_sys_kexec_load(unsigned long entry,
unsigned long nr_segments,
struct compat_kexec_segment __user *segments,
unsigned long flags)
COMPAT_SYSCALL_DEFINE4(kexec_load, compat_ulong_t, entry,
compat_ulong_t, nr_segments,
struct compat_kexec_segment __user *, segments,
compat_ulong_t, flags)
{
struct compat_kexec_segment in;
struct kexec_segment out, __user *ksegments;