| #include <stdint.h> |
| #include <inttypes.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| #include "../../../none/tests/s390x/opcodes.h" |
| |
| /* Define various input buffers. */ |
| |
| /* U+0000 to U+d7ff: Result is 2 bytes for each uint32_t |
| U+dc00 to U+ffff: Result is 2 bytes for each uint32_t */ |
| uint32_t pattern2[] = { |
| 0x0000, 0xd7ff, /* corner cases */ |
| 0xdc00, 0xffff, /* corner cases */ |
| 0xabba, 0xf00d, 0xd00f, 0x1234 /* misc */ |
| }; |
| |
| /* U+00010000 to U+0010ffff: Result is 4 bytes for each uint32_t */ |
| uint32_t pattern4[] = { |
| 0x00010000, 0x0010ffff, /* corner cases */ |
| 0x00010123, 0x00023456, 0x000789ab, 0x00100000 /* misc */ |
| }; |
| |
| static void |
| do_cu42(uint16_t *dst, uint64_t dst_len, uint32_t *src, uint64_t src_len) |
| { |
| /* build up the register pairs */ |
| register uint32_t *source asm("4") = src; |
| register uint64_t source_len asm("5") = src_len; |
| register uint16_t *dest asm("2") = dst; |
| register uint64_t dest_len asm("3") = dst_len; |
| |
| asm volatile( |
| CU42(2,4) |
| : "+d"(dest), "+d"(source), "+d"(source_len), "+d"(dest_len) |
| : |
| : "memory", "cc"); |
| } |
| |
| int main() |
| { |
| /*------------------------------------------------------------*/ |
| /* Write to a too small buffer */ |
| /*------------------------------------------------------------*/ |
| |
| /* Write 2 bytes into buffer of length 1 */ |
| do_cu42(malloc(1), 10, pattern2, 4); // complaint (2 bytes) |
| |
| /* Write 2 bytes into buffer of length 2 */ |
| do_cu42(malloc(2), 10, pattern2, 4); // no complaint |
| |
| /* Write 4 bytes into buffer of length 1 */ |
| do_cu42(malloc(1), 10, pattern4, 4); // complaint (4 bytes) |
| |
| /* Write 4 bytes into buffer of length 2 */ |
| do_cu42(malloc(2), 10, pattern4, 4); // complaint (4 bytes) |
| |
| /* Write 4 bytes into buffer of length 3 */ |
| do_cu42(malloc(3), 10, pattern4, 4); // complaint (4 bytes) |
| |
| /* Write 4 bytes into buffer of length 4 */ |
| do_cu42(malloc(4), 10, pattern4, 4); // no complaint |
| |
| /*------------------------------------------------------------*/ |
| /* Read uninitialised data */ |
| /*------------------------------------------------------------*/ |
| uint16_t buf[100]; |
| uint8_t *input; |
| |
| /* Input buffer is completely uninitialised */ |
| input = malloc(10); |
| do_cu42(buf, sizeof buf, (void *)input, 4); // complaint |
| |
| /* Read 4 bytes from input buffer. First byte is uninitialised */ |
| input = malloc(10); |
| input[1] = input[2] = input[3] = 0x0; |
| do_cu42(buf, sizeof buf, (void *)input, 4); // complaint |
| |
| /* Read 4 bytes from input buffer. Second byte is uninitialised */ |
| input = malloc(10); |
| input[0] = input[2] = input[3] = 0x0; |
| do_cu42(buf, sizeof buf, (void *)input, 4); // complaint |
| |
| /* Read 4 bytes from input buffer. Third byte is uninitialised */ |
| input = malloc(10); |
| input[0] = input[1] = input[3] = 0x0; |
| do_cu42(buf, sizeof buf, (void *)input, 4); // complaint |
| |
| /* Read 4 bytes from input buffer. Fourth byte is uninitialised */ |
| input = malloc(10); |
| input[0] = input[1] = input[2] = 0x0; |
| do_cu42(buf, sizeof buf, (void *)input, 4); // complaint |
| |
| /* Read 4 bytes from input buffer. All bytes are initialised */ |
| input = malloc(10); |
| memset(input, 0, 4); |
| do_cu42(buf, sizeof buf, (void *)input, 4); // no complaint |
| |
| /* Read 8 bytes from input buffer. This iterates once. In the 1st |
| iteration all input bytes are initialised in the 2nd iteration all |
| input bytes are uninitialised. */ |
| input = malloc(10); |
| memset(input, 0, 4); |
| do_cu42(buf, sizeof buf, (void *)input, 8); // complaint |
| |
| |
| /* Write to NULL */ |
| // do_cu42(NULL, 10, pattern1, sizeof pattern1); // complaint |
| |
| return 0; |
| } |