| 42 | } |
| 43 | |
| 44 | NOINLINE |
| 45 | int32_t SafeAccess::load32(int32_t* ptr, int32_t default_value) { |
| 46 | #if defined(__x86_64__) |
| 47 | int32_t ret; |
| 48 | asm volatile("movl (%1), %0" : "=a"(ret) : "r"(ptr), "S"(default_value)); |
| 49 | #elif defined(__i386__) |
| 50 | int32_t ret; |
| 51 | asm volatile("movl (%1), %0" : "=a"(ret) : "r"(ptr), "a"(default_value)); |
| 52 | #elif defined(__aarch64__) |
| 53 | register int32_t ret asm("w0"); |
| 54 | asm volatile("ldr %w0, [%1]" : "=r"(ret) : "r"(ptr), "r"(default_value)); |
| 55 | #else |
| 56 | asm volatile("" : : "r"(default_value)); // prevent compiler from optimizing the argument away |
| 57 | int32_t ret = *ptr; |
| 58 | #endif |
| 59 | LABEL(load32_end); |
| 60 | return ret; |
| 61 | } |
| 62 | |
| 63 | // When a memory access error happens in SafeAccess::load/load32, |
| 64 | // this function skips the fault instruction pretending it has loaded default_value |
nothing calls this directly
no outgoing calls
no test coverage detected