| /* { dg-do compile } */ |
| /* { dg-require-effective-target ilp32 } */ |
| /* { dg-options "-O" } */ |
| |
| typedef unsigned char u8; |
| struct __large_struct { unsigned long buf[100]; }; |
| static inline __attribute__((always_inline)) unsigned long |
| __copy_from_user_inatomic(void *to, const void *from, unsigned long n) |
| { |
| unsigned long ret = 0; |
| asm volatile("1: mov""b"" %2,%""b""1\n" "2:\n" |
| ".section .fixup,\"ax\"\n" |
| "3: mov %3,%0\n" |
| " xor""b"" %""b""1,%""b""1\n" |
| " jmp 2b\n" |
| ".previous\n" |
| " .section __ex_table,\"a\"\n" |
| " " ".balign 4" " " "\n" |
| " " ".long" " " "1b" "," "3b" "\n" |
| " .previous\n" |
| : "=r" (ret), "=q"(*(u8 *)to) |
| : "m" ((*(struct __large_struct *)(from))), "i" (1), "0" (ret)); |
| return ret; |
| } |
| void romchecksum(const unsigned char *rom, unsigned char c) |
| { |
| unsigned char sum; |
| for (sum = 0; |
| !__copy_from_user_inatomic(&(c), ( typeof(c) *)(rom++), sizeof(c));) |
| sum += c; |
| } |
