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+007f: Result is 1 byte for each uint16_t */ 11 uint16_t pattern1[] = { 12 0x0000, 0x007f, /* corner cases */ 13 0x0047, 0x0056, 0x0045, 0x0021, 0x007b, 0x003a /* misc */ 14 }; 15 16 /* U+0080 to U+07ff: Result is 2 bytes for each uint16_t */ 17 uint16_t pattern2[] = { 18 0x0080, 0x07ff, /* corner cases */ 19 0x07df, 0x008f, 0x0100, 0x017f, 0x052f, 0x0600, 0x06ff /* misc */ 20 }; 21 22 /* U+0800 to U+d7ff: Result is 3 bytes for each uint16_t 23 U+dc00 to U+ffff: Result is 3 bytes for each uint16_t */ 24 uint16_t pattern3[] = { 25 0x0800, 0xd7ff, /* corner cases */ 26 0xdc00, 0xffff, /* corner cases */ 27 0x083f, 0x1a21, 0x1b10, 0x2200, 0x225e, 0x22c9, 0xe001 /* misc */ 28 }; 29 30 /* U+d800 to U+dbff: Result is 4 bytes for each uint16_t pair */ 31 uint16_t pattern4[] = { 32 0xd800, 0xdc00, /* left corner case */ 33 0xdbff, 0xdfff, /* right corner case */ 34 0xdada, 0xdddd, 0xdeaf, 0xdcdc /* misc */ 35 }; 36 37 38 void 39 do_cu21(uint8_t *dst, uint64_t dst_len, uint16_t *src, uint64_t src_len) 40 { 41 /* build up the register pairs */ 42 register uint16_t *source asm("4") = src; 43 register uint64_t source_len asm("5") = src_len; 44 register uint8_t *dest asm("2") = dst; 45 register uint64_t dest_len asm("3") = dst_len; 46 47 asm volatile( 48 CU21(0,2,4) 49 : "+d"(dest), "+d"(source), "+d"(source_len), "+d"(dest_len) 50 : 51 : "memory", "cc"); 52 return; 53 } 54 55 int main() 56 { 57 /*------------------------------------------------------------*/ 58 /* Write to a too small buffer */ 59 /*------------------------------------------------------------*/ 60 61 /* Write 2 bytes into buffer of length 1 */ 62 do_cu21(malloc(1), 10, pattern2, 2); // complaint (2 bytes) 63 64 /* Write 2 bytes into buffer of length 2 */ 65 do_cu21(malloc(2), 10, pattern2, 2); // no complaint 66 67 /* Write 3 bytes into buffer of length 1 */ 68 do_cu21(malloc(1), 10, pattern3, 2); // 2 complaints (3 = 2+1) 69 70 /* Write 3 bytes into buffer of length 2 */ 71 do_cu21(malloc(2), 10, pattern3, 2); // complaint (1 byte) 72 73 /* Write 3 bytes into buffer of length 3 */ 74 do_cu21(malloc(3), 10, pattern3, 2); // no complaint 75 76 /* Write 4 bytes into buffer of length 1 */ 77 do_cu21(malloc(1), 10, pattern4, 4); // complaint (4 bytes) 78 79 /* Write 4 bytes into buffer of length 2 */ 80 do_cu21(malloc(2), 10, pattern4, 4); // complaint (4 bytes) 81 82 /* Write 4 bytes into buffer of length 3 */ 83 do_cu21(malloc(3), 10, pattern4, 4); // complaint (4 bytes) 84 85 /* Write 4 bytes into buffer of length 4 */ 86 do_cu21(malloc(4), 10, pattern4, 4); // no complaint 87 88 /*------------------------------------------------------------*/ 89 /* Read uninitialised data */ 90 /*------------------------------------------------------------*/ 91 uint8_t *input = malloc(10); 92 93 /* Input buffer is completely uninitialised */ 94 do_cu21(malloc(4), 4, (void *)input, 2); // complaint 95 96 /* Read 2 bytes from input buffer. First byte is uninitialised */ 97 input = malloc(10); 98 input[1] = 0x0; 99 do_cu21(malloc(4), 4, (void *)input, 2); // complaint 100 101 /* Read 2 bytes from input buffer. Second byte is uninitialised */ 102 input = malloc(10); 103 input[0] = 0x0; 104 do_cu21(malloc(4), 4, (void *)input, 2); // complaint 105 106 /* Read 2 bytes from input buffer. All bytes are initialised */ 107 input = malloc(10); 108 input[0] = input[1] = 0x0; 109 do_cu21(malloc(4), 4, (void *)input, 2); // no complaint 110 111 /* Read 4 bytes from input buffer. This iterates once. In the 1st 112 iteration all input bytes are initialised in the 2nd iteration all 113 input bytes are uninitialised. */ 114 input = malloc(10); 115 input[0] = input[1] = 0x0; 116 do_cu21(malloc(4), 4, (void *)input, 4); // complaint 117 118 /* Write to NULL */ 119 // do_cu21(NULL, 10, pattern1, sizeof pattern1); // complaint 120 121 return 0; 122 } 123
