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platform_kernel-5.15
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x86: sys32_kill and sys32_mprotect are pointless 

their argument types are identical to those of sys_kill and sys_mprotect
resp., so we are not doing any kind of argument validation, etc. in those -
they turn into unconditional branches to corresponding syscalls.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2013-02-24 14:00:48 -05:00
parent 0e65a81b10
commit 07b053457b
3 changed files with 2 additions and 15 deletions
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11
arch/x86/ia32/sys_ia32.c
View File

@ -166,12 +166,6 @@ asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
a.offset>>PAGE_SHIFT); a.offset>>PAGE_SHIFT);
} }
asmlinkage long sys32_mprotect(unsigned long start, size_t len,
unsigned long prot)
{
return sys_mprotect(start, len, prot);
}
asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr, asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
int options) int options)
{ {
@ -198,11 +192,6 @@ asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
* Some system calls that need sign extended arguments. This could be * Some system calls that need sign extended arguments. This could be
* done by a generic wrapper. * done by a generic wrapper.
*/ */
long sys32_kill(int pid, int sig)
{
return sys_kill(pid, sig);
}
long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
__u32 len_low, __u32 len_high, int advice) __u32 len_low, __u32 len_high, int advice)
{ {

2
arch/x86/include/asm/sys_ia32.h
View File

@ -30,7 +30,6 @@ asmlinkage long sys32_fstatat(unsigned int, const char __user *,
struct stat64 __user *, int); struct stat64 __user *, int);
struct mmap_arg_struct32; struct mmap_arg_struct32;
asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *); asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *);
asmlinkage long sys32_mprotect(unsigned long, size_t, unsigned long);
asmlinkage long sys32_alarm(unsigned int); asmlinkage long sys32_alarm(unsigned int);
@ -42,7 +41,6 @@ asmlinkage long sys32_pwrite(unsigned int, const char __user *, u32, u32, u32);
asmlinkage long sys32_personality(unsigned long); asmlinkage long sys32_personality(unsigned long);
long sys32_kill(int, int);
long sys32_fadvise64_64(int, __u32, __u32, __u32, __u32, int); long sys32_fadvise64_64(int, __u32, __u32, __u32, __u32, int);
long sys32_vm86_warning(void); long sys32_vm86_warning(void);

4
arch/x86/syscalls/syscall_32.tbl
View File

@ -43,7 +43,7 @@
34 i386 nice sys_nice 34 i386 nice sys_nice
35 i386 ftime 35 i386 ftime
36 i386 sync sys_sync 36 i386 sync sys_sync
37 i386 kill sys_kill sys32_kill 37 i386 kill sys_kill
38 i386 rename sys_rename 38 i386 rename sys_rename
39 i386 mkdir sys_mkdir 39 i386 mkdir sys_mkdir
40 i386 rmdir sys_rmdir 40 i386 rmdir sys_rmdir
@ -131,7 +131,7 @@
122 i386 uname sys_newuname 122 i386 uname sys_newuname
123 i386 modify_ldt sys_modify_ldt 123 i386 modify_ldt sys_modify_ldt
124 i386 adjtimex sys_adjtimex compat_sys_adjtimex 124 i386 adjtimex sys_adjtimex compat_sys_adjtimex
125 i386 mprotect sys_mprotect sys32_mprotect 125 i386 mprotect sys_mprotect
126 i386 sigprocmask sys_sigprocmask compat_sys_sigprocmask 126 i386 sigprocmask sys_sigprocmask compat_sys_sigprocmask
127 i386 create_module 127 i386 create_module
128 i386 init_module sys_init_module 128 i386 init_module sys_init_module