mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-11 01:46:17 +00:00
123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
#include <stdint.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "../../../none/tests/s390x/opcodes.h"
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/* Define various input buffers. */
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/* U+0000 to U+007f: Result is 1 byte for each uint16_t */
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uint16_t pattern1[] = {
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0x0000, 0x007f, /* corner cases */
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0x0047, 0x0056, 0x0045, 0x0021, 0x007b, 0x003a /* misc */
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};
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/* U+0080 to U+07ff: Result is 2 bytes for each uint16_t */
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uint16_t pattern2[] = {
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0x0080, 0x07ff, /* corner cases */
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0x07df, 0x008f, 0x0100, 0x017f, 0x052f, 0x0600, 0x06ff /* misc */
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};
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/* U+0800 to U+d7ff: Result is 3 bytes for each uint16_t
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U+dc00 to U+ffff: Result is 3 bytes for each uint16_t */
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uint16_t pattern3[] = {
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0x0800, 0xd7ff, /* corner cases */
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0xdc00, 0xffff, /* corner cases */
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0x083f, 0x1a21, 0x1b10, 0x2200, 0x225e, 0x22c9, 0xe001 /* misc */
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};
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/* U+d800 to U+dbff: Result is 4 bytes for each uint16_t pair */
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uint16_t pattern4[] = {
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0xd800, 0xdc00, /* left corner case */
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0xdbff, 0xdfff, /* right corner case */
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0xdada, 0xdddd, 0xdeaf, 0xdcdc /* misc */
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};
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void
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do_cu21(uint8_t *dst, uint64_t dst_len, uint16_t *src, uint64_t src_len)
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{
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/* build up the register pairs */
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register uint16_t *source asm("4") = src;
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register uint64_t source_len asm("5") = src_len;
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register uint8_t *dest asm("2") = dst;
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register uint64_t dest_len asm("3") = dst_len;
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asm volatile(
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CU21(0,2,4)
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: "+d"(dest), "+d"(source), "+d"(source_len), "+d"(dest_len)
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:
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: "memory", "cc");
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return;
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}
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int main()
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{
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/*------------------------------------------------------------*/
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/* Write to a too small buffer */
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/*------------------------------------------------------------*/
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/* Write 2 bytes into buffer of length 1 */
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do_cu21(malloc(1), 10, pattern2, 2); // complaint (2 bytes)
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/* Write 2 bytes into buffer of length 2 */
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do_cu21(malloc(2), 10, pattern2, 2); // no complaint
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/* Write 3 bytes into buffer of length 1 */
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do_cu21(malloc(1), 10, pattern3, 2); // 2 complaints (3 = 2+1)
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/* Write 3 bytes into buffer of length 2 */
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do_cu21(malloc(2), 10, pattern3, 2); // complaint (1 byte)
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/* Write 3 bytes into buffer of length 3 */
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do_cu21(malloc(3), 10, pattern3, 2); // no complaint
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/* Write 4 bytes into buffer of length 1 */
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do_cu21(malloc(1), 10, pattern4, 4); // complaint (4 bytes)
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/* Write 4 bytes into buffer of length 2 */
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do_cu21(malloc(2), 10, pattern4, 4); // complaint (4 bytes)
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/* Write 4 bytes into buffer of length 3 */
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do_cu21(malloc(3), 10, pattern4, 4); // complaint (4 bytes)
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/* Write 4 bytes into buffer of length 4 */
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do_cu21(malloc(4), 10, pattern4, 4); // no complaint
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/*------------------------------------------------------------*/
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/* Read uninitialised data */
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/*------------------------------------------------------------*/
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uint8_t *input = malloc(10);
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/* Input buffer is completely uninitialised */
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do_cu21(malloc(4), 4, (void *)input, 2); // complaint
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/* Read 2 bytes from input buffer. First byte is uninitialised */
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input = malloc(10);
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input[1] = 0x0;
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do_cu21(malloc(4), 4, (void *)input, 2); // complaint
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/* Read 2 bytes from input buffer. Second byte is uninitialised */
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input = malloc(10);
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input[0] = 0x0;
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do_cu21(malloc(4), 4, (void *)input, 2); // complaint
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/* Read 2 bytes from input buffer. All bytes are initialised */
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input = malloc(10);
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input[0] = input[1] = 0x0;
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do_cu21(malloc(4), 4, (void *)input, 2); // no complaint
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/* Read 4 bytes from input buffer. This iterates once. In the 1st
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iteration all input bytes are initialised in the 2nd iteration all
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input bytes are uninitialised. */
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input = malloc(10);
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input[0] = input[1] = 0x0;
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do_cu21(malloc(4), 4, (void *)input, 4); // complaint
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/* Write to NULL */
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// do_cu21(NULL, 10, pattern1, sizeof pattern1); // complaint
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return 0;
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}
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