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/*
* Copyright 2003 PathScale, Inc.
*
* Licensed under the GPL
*/
#include "linux/linkage.h"
#include "linux/slab.h"
#include "linux/shm.h"
#include "asm/uaccess.h"
#define __FRAME_OFFSETS
#include "asm/ptrace.h"
#include "asm/unistd.h"
#include "asm/prctl.h" /* XXX This should get the constants from libc */
#include "choose-mode.h"
asmlinkage long wrap_sys_shmat(int shmid, char __user *shmaddr, int shmflg)
{
unsigned long raddr;
return do_shmat(shmid, shmaddr, shmflg, &raddr) ?: (long) raddr;
}
#ifdef CONFIG_MODE_TT
extern int modify_ldt(int func, void *ptr, unsigned long bytecount);
long sys_modify_ldt_tt(int func, void *ptr, unsigned long bytecount)
{
/* XXX This should check VERIFY_WRITE depending on func, check this
* in i386 as well.
*/
if (!access_ok(VERIFY_READ, ptr, bytecount))
return -EFAULT;
return(modify_ldt(func, ptr, bytecount));
}
#endif
#ifdef CONFIG_MODE_SKAS
extern int userspace_pid[];
long sys_modify_ldt_skas(int func, void *ptr, unsigned long bytecount)
{
struct ptrace_ldt ldt;
void *buf;
int res, n;
buf = kmalloc(bytecount, GFP_KERNEL);
if(buf == NULL)
return(-ENOMEM);
res = 0;
switch(func){
case 1:
case 0x11:
res = copy_from_user(buf, ptr, bytecount);
break;
}
if(res != 0){
res = -EFAULT;
goto out;
}
ldt = ((struct ptrace_ldt) { .func = func,
.ptr = buf,
.bytecount = bytecount });
#warning Need to look up userspace_pid by cpu
res = ptrace(PTRACE_LDT, userspace_pid[0], 0, (unsigned long) &ldt);
if(res < 0)
goto out;
switch(func){
case 0:
case 2:
n = res;
res = copy_to_user(ptr, buf, n);
if(res != 0)
res = -EFAULT;
else
res = n;
break;
}
out:
kfree(buf);
return(res);
}
#endif
long sys_modify_ldt(int func, void *ptr, unsigned long bytecount)
{
return(CHOOSE_MODE_PROC(sys_modify_ldt_tt, sys_modify_ldt_skas, func,
ptr, bytecount));
}
#ifdef CONFIG_MODE_TT
extern long arch_prctl(int code, unsigned long addr);
static long arch_prctl_tt(int code, unsigned long addr)
{
unsigned long tmp;
long ret;
switch(code){
case ARCH_SET_GS:
case ARCH_SET_FS:
ret = arch_prctl(code, addr);
break;
case ARCH_GET_FS:
case ARCH_GET_GS:
ret = arch_prctl(code, (unsigned long) &tmp);
if(!ret)
ret = put_user(tmp, &addr);
break;
default:
ret = -EINVAL;
break;
}
return(ret);
}
#endif
#ifdef CONFIG_MODE_SKAS
static long arch_prctl_skas(int code, unsigned long addr)
{
long ret = 0;
switch(code){
case ARCH_SET_GS:
current->thread.regs.regs.skas.regs[GS_BASE / sizeof(unsigned long)] = addr;
break;
case ARCH_SET_FS:
current->thread.regs.regs.skas.regs[FS_BASE / sizeof(unsigned long)] = addr;
break;
case ARCH_GET_FS:
ret = put_user(current->thread.regs.regs.skas.regs[GS / sizeof(unsigned long)], &addr);
break;
case ARCH_GET_GS:
ret = put_user(current->thread.regs.regs.skas.regs[FS / sizeof(unsigned \
long)], &addr);
break;
default:
ret = -EINVAL;
break;
}
return(ret);
}
#endif
long sys_arch_prctl(int code, unsigned long addr)
{
return(CHOOSE_MODE_PROC(arch_prctl_tt, arch_prctl_skas, code, addr));
}
long sys_clone(unsigned long clone_flags, unsigned long newsp,
void __user *parent_tid, void __user *child_tid)
{
long ret;
/* XXX: normal arch do here this pass, and also pass the regs to
* do_fork, instead of NULL. Currently the arch-independent code
* ignores these values, while the UML code (actually it's
* copy_thread) does the right thing. But this should change,
probably. */
/*if (!newsp)
newsp = UPT_SP(current->thread.regs);*/
current->thread.forking = 1;
ret = do_fork(clone_flags, newsp, NULL, 0, parent_tid, child_tid);
current->thread.forking = 0;
return(ret);
}
/*
* Overrides for Emacs so that we follow Linus's tabbing style.
* Emacs will notice this stuff at the end of the file and automatically
* adjust the settings for this buffer only. This must remain at the end
* of the file.
* ---------------------------------------------------------------------------
* Local variables:
* c-file-style: "linux"
* End:
*/
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