xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Vork 0
Code Kwesties Pull-aanvragen Actions Packages Projecten Publicaties Wiki Activiteit

x86, um/x86: switch to generic sys_execve and kernel_execve

Bladeren bron 
32bit wrapper is lost on that; 64bit one is *not*, since
we need to arrange for full pt_regs on stack when we call
sys_execve() and we need to load callee-saved ones from
there afterwards.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-08-02 23:05:11 +04:00
bovenliggende 7076aada10
commit 6783eaa2e1
17 gewijzigde bestanden met toevoegingen van 34 en 158 verwijderingen
Download Patch-bestand Download Diff-bestand Expand all files Collapse all files

25
arch/um/kernel/exec.c
Bestand weergeven

@@ -16,7 +16,6 @@
#include "mem_user.h"
#include "skas.h"
#include "os.h"
#include "internal.h"
void flush_thread(void)
{
@@ -49,27 +48,7 @@ void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
}
EXPORT_SYMBOL(start_thread);
long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env)
void __noreturn ret_from_kernel_execve(struct pt_regs *unused)
{
long err;
err = do_execve(file, argv, env, &current->thread.regs);
if (!err)
UML_LONGJMP(current->thread.exec_buf, 1);
return err;
}
long sys_execve(const char __user *file, const char __user *const __user *argv,
const char __user *const __user *env)
{
long error;
char *filename;
filename = getname(file);
error = PTR_ERR(filename);
if (IS_ERR(filename)) goto out;
error = do_execve(filename, argv, env, &current->thread.regs);
putname(filename);
out:
return error;
UML_LONGJMP(current->thread.exec_buf, 1);
}

1
arch/um/kernel/internal.h
Bestand weergeven

@@ -1 +0,0 @@
extern long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env);

17
arch/um/kernel/syscall.c
Bestand weergeven

@@ -13,7 +13,6 @@
#include "asm/mman.h"
#include "asm/uaccess.h"
#include "asm/unistd.h"
#include "internal.h"
long sys_fork(void)
{
@@ -50,19 +49,3 @@ long old_mmap(unsigned long addr, unsigned long len,
out:
return err;
}
int kernel_execve(const char *filename,
const char *const argv[],
const char *const envp[])
{
mm_segment_t fs;
int ret;
fs = get_fs();
set_fs(KERNEL_DS);
ret = um_execve(filename, (const char __user *const __user *)argv,
(const char __user *const __user *) envp);
set_fs(fs);
return ret;
}