Fix it a bit (after some cross checking with "man arch_prctl"). There were:
*) typos FS/GS and back
*) FS in place of FS_BASE (and the same for GS)
*) the procedure used put_user on &addr, where addr was the parameter (i.e.
changed its param with put_user, completely useless) rather than interpreting
addr as a pointer, as requested in this case (see the man page).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <[email protected]>
---
linux-2.6.git-paolo/arch/um/sys-x86_64/syscalls.c | 16 ++++++++++------
1 files changed, 10 insertions(+), 6 deletions(-)
diff -puN arch/um/sys-x86_64/syscalls.c~uml-fixlet-arch-prctl arch/um/sys-x86_64/syscalls.c
--- linux-2.6.git/arch/um/sys-x86_64/syscalls.c~uml-fixlet-arch-prctl 2005-05-25 01:13:20.000000000 +0200
+++ linux-2.6.git-paolo/arch/um/sys-x86_64/syscalls.c 2005-05-25 01:14:05.000000000 +0200
@@ -133,23 +133,27 @@ static long arch_prctl_tt(int code, unsi
#ifdef CONFIG_MODE_SKAS
+/* XXX: Must also call arch_prctl in the host, beside saving the segment bases! */
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_SET_GS:
+ current->thread.regs.regs.skas.regs[GS_BASE / sizeof(unsigned long)] = addr;
+ break;
case ARCH_GET_FS:
- ret = put_user(current->thread.regs.regs.skas.regs[GS / sizeof(unsigned long)], &addr);
+ ret = put_user(current->thread.regs.regs.skas.
+ regs[FS_BASE / sizeof(unsigned long)],
+ (unsigned long __user *)addr);
break;
case ARCH_GET_GS:
- ret = put_user(current->thread.regs.regs.skas.regs[FS / sizeof(unsigned \
-long)], &addr);
+ ret = put_user(current->thread.regs.regs.skas.
+ regs[GS_BASE / sizeof(unsigned long)],
+ (unsigned long __user *)addr);
break;
default:
ret = -EINVAL;
_
-
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