static int tprot(unsigned long addr)
{
- unsigned long reg1, reg2;
int cc, exception;
- psw_t old;
exception = 1;
asm volatile(
- " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n"
- " epsw %[reg1],%[reg2]\n"
- " st %[reg1],0(%[psw_pgm])\n"
- " st %[reg2],4(%[psw_pgm])\n"
- " larl %[reg1],1f\n"
- " stg %[reg1],8(%[psw_pgm])\n"
" tprot 0(%[addr]),0\n"
- " lhi %[exc],0\n"
- "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n"
+ "0: lhi %[exc],0\n"
+ "1:\n"
CC_IPM(cc)
- : CC_OUT(cc, cc),
- [exc] "+d" (exception),
- [reg1] "=&d" (reg1),
- [reg2] "=&a" (reg2),
- "=Q" (get_lowcore()->program_new_psw.addr),
- "=Q" (old)
- : [psw_old] "a" (&old),
- [psw_pgm] "a" (&get_lowcore()->program_new_psw),
- [addr] "a" (addr)
+ EX_TABLE(0b, 1b)
+ : CC_OUT(cc, cc), [exc] "+d" (exception)
+ : [addr] "a" (addr)
: CC_CLOBBER_LIST("memory"));
cc = exception ? -EFAULT : CC_TRANSFORM(cc);
return cc;