1 #include <stdint.h> 2 #include <inttypes.h> 3 #include <stdlib.h> 4 #include <string.h> 5 #include <stdio.h> 6 #include "../../../none/tests/s390x/opcodes.h" 7 8 /* Define various input buffers. */ 9 10 /* U+0000 to U+d7ff: Result is 2 bytes for each uint32_t 11 U+dc00 to U+ffff: Result is 2 bytes for each uint32_t */ 12 uint32_t pattern2[] = { 13 0x0000, 0xd7ff, /* corner cases */ 14 0xdc00, 0xffff, /* corner cases */ 15 0xabba, 0xf00d, 0xd00f, 0x1234 /* misc */ 16 }; 17 18 /* U+00010000 to U+0010ffff: Result is 4 bytes for each uint32_t */ 19 uint32_t pattern4[] = { 20 0x00010000, 0x0010ffff, /* corner cases */ 21 0x00010123, 0x00023456, 0x000789ab, 0x00100000 /* misc */ 22 }; 23 24 static void 25 do_cu42(uint16_t *dst, uint64_t dst_len, uint32_t *src, uint64_t src_len) 26 { 27 /* build up the register pairs */ 28 register uint32_t *source asm("4") = src; 29 register uint64_t source_len asm("5") = src_len; 30 register uint16_t *dest asm("2") = dst; 31 register uint64_t dest_len asm("3") = dst_len; 32 33 asm volatile( 34 CU42(2,4) 35 : "+d"(dest), "+d"(source), "+d"(source_len), "+d"(dest_len) 36 : 37 : "memory", "cc"); 38 } 39 40 int main() 41 { 42 /*------------------------------------------------------------*/ 43 /* Write to a too small buffer */ 44 /*------------------------------------------------------------*/ 45 46 /* Write 2 bytes into buffer of length 1 */ 47 do_cu42(malloc(1), 10, pattern2, 4); // complaint (2 bytes) 48 49 /* Write 2 bytes into buffer of length 2 */ 50 do_cu42(malloc(2), 10, pattern2, 4); // no complaint 51 52 /* Write 4 bytes into buffer of length 1 */ 53 do_cu42(malloc(1), 10, pattern4, 4); // complaint (4 bytes) 54 55 /* Write 4 bytes into buffer of length 2 */ 56 do_cu42(malloc(2), 10, pattern4, 4); // complaint (4 bytes) 57 58 /* Write 4 bytes into buffer of length 3 */ 59 do_cu42(malloc(3), 10, pattern4, 4); // complaint (4 bytes) 60 61 /* Write 4 bytes into buffer of length 4 */ 62 do_cu42(malloc(4), 10, pattern4, 4); // no complaint 63 64 /*------------------------------------------------------------*/ 65 /* Read uninitialised data */ 66 /*------------------------------------------------------------*/ 67 uint16_t buf[100]; 68 uint8_t *input; 69 70 /* Input buffer is completely uninitialised */ 71 input = malloc(10); 72 do_cu42(buf, sizeof buf, (void *)input, 4); // complaint 73 74 /* Read 4 bytes from input buffer. First byte is uninitialised */ 75 input = malloc(10); 76 input[1] = input[2] = input[3] = 0x0; 77 do_cu42(buf, sizeof buf, (void *)input, 4); // complaint 78 79 /* Read 4 bytes from input buffer. Second byte is uninitialised */ 80 input = malloc(10); 81 input[0] = input[2] = input[3] = 0x0; 82 do_cu42(buf, sizeof buf, (void *)input, 4); // complaint 83 84 /* Read 4 bytes from input buffer. Third byte is uninitialised */ 85 input = malloc(10); 86 input[0] = input[1] = input[3] = 0x0; 87 do_cu42(buf, sizeof buf, (void *)input, 4); // complaint 88 89 /* Read 4 bytes from input buffer. Fourth byte is uninitialised */ 90 input = malloc(10); 91 input[0] = input[1] = input[2] = 0x0; 92 do_cu42(buf, sizeof buf, (void *)input, 4); // complaint 93 94 /* Read 4 bytes from input buffer. All bytes are initialised */ 95 input = malloc(10); 96 memset(input, 0, 4); 97 do_cu42(buf, sizeof buf, (void *)input, 4); // no complaint 98 99 /* Read 8 bytes from input buffer. This iterates once. In the 1st 100 iteration all input bytes are initialised in the 2nd iteration all 101 input bytes are uninitialised. */ 102 input = malloc(10); 103 memset(input, 0, 4); 104 do_cu42(buf, sizeof buf, (void *)input, 8); // complaint 105 106 107 /* Write to NULL */ 108 // do_cu42(NULL, 10, pattern1, sizeof pattern1); // complaint 109 110 return 0; 111 } 112
