mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-11 01:46:17 +00:00
112 lines
3.8 KiB
C
112 lines
3.8 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+d7ff: Result is 2 bytes for each uint32_t
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U+dc00 to U+ffff: Result is 2 bytes for each uint32_t */
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uint32_t pattern2[] = {
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0x0000, 0xd7ff, /* corner cases */
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0xdc00, 0xffff, /* corner cases */
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0xabba, 0xf00d, 0xd00f, 0x1234 /* misc */
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};
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/* U+00010000 to U+0010ffff: Result is 4 bytes for each uint32_t */
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uint32_t pattern4[] = {
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0x00010000, 0x0010ffff, /* corner cases */
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0x00010123, 0x00023456, 0x000789ab, 0x00100000 /* misc */
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};
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static void
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do_cu42(uint16_t *dst, uint64_t dst_len, uint32_t *src, uint64_t src_len)
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{
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/* build up the register pairs */
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register uint32_t *source asm("4") = src;
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register uint64_t source_len asm("5") = src_len;
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register uint16_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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CU42(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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}
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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_cu42(malloc(1), 10, pattern2, 4); // complaint (2 bytes)
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/* Write 2 bytes into buffer of length 2 */
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do_cu42(malloc(2), 10, pattern2, 4); // no complaint
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/* Write 4 bytes into buffer of length 1 */
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do_cu42(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_cu42(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_cu42(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_cu42(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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uint16_t buf[100];
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uint8_t *input;
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/* Input buffer is completely uninitialised */
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input = malloc(10);
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do_cu42(buf, sizeof buf, (void *)input, 4); // complaint
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/* Read 4 bytes from input buffer. First byte is uninitialised */
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input = malloc(10);
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input[1] = input[2] = input[3] = 0x0;
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do_cu42(buf, sizeof buf, (void *)input, 4); // complaint
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/* Read 4 bytes from input buffer. Second byte is uninitialised */
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input = malloc(10);
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input[0] = input[2] = input[3] = 0x0;
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do_cu42(buf, sizeof buf, (void *)input, 4); // complaint
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/* Read 4 bytes from input buffer. Third byte is uninitialised */
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input = malloc(10);
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input[0] = input[1] = input[3] = 0x0;
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do_cu42(buf, sizeof buf, (void *)input, 4); // complaint
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/* Read 4 bytes from input buffer. Fourth byte is uninitialised */
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input = malloc(10);
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input[0] = input[1] = input[2] = 0x0;
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do_cu42(buf, sizeof buf, (void *)input, 4); // complaint
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/* Read 4 bytes from input buffer. All bytes are initialised */
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input = malloc(10);
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memset(input, 0, 4);
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do_cu42(buf, sizeof buf, (void *)input, 4); // no complaint
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/* Read 8 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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memset(input, 0, 4);
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do_cu42(buf, sizeof buf, (void *)input, 8); // complaint
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/* Write to NULL */
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// do_cu42(NULL, 10, pattern1, sizeof pattern1); // complaint
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return 0;
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}
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