| 1 | /* |
| 2 | * Test modifying an EXECUTE target. |
| 3 | * |
| 4 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 5 | */ |
| 6 | #include <assert.h> |
| 7 | #include <stdlib.h> |
| 8 | |
| 9 | /* Make sure we exercise the same EXECUTE instruction. */ |
| 10 | extern void execute(unsigned char *insn, unsigned char mask, |
| 11 | unsigned long *r1_r5); |
| 12 | asm(".globl execute\n" |
| 13 | "execute:\n" |
| 14 | "lg %r1,0(%r4)\n" |
| 15 | "lg %r5,8(%r4)\n" |
| 16 | "ex %r3,0(%r2)\n" |
| 17 | "stg %r5,8(%r4)\n" |
| 18 | "stg %r1,0(%r4)\n" |
| 19 | "br %r14\n"); |
| 20 | |
| 21 | /* Define an RWX EXECUTE target. */ |
| 22 | extern unsigned char lgfi[]; |
| 23 | asm(".pushsection .rwx,\"awx\",@progbits\n" |
| 24 | ".globl lgfi\n" |
| 25 | "lgfi: lgfi %r0,0\n" |
| 26 | ".popsection\n"); |
| 27 | |
| 28 | int main(void) |
| 29 | { |
| 30 | unsigned long r1_r5[2]; |
| 31 | |
| 32 | /* Create an initial TB. */ |
| 33 | r1_r5[0] = -1; |
| 34 | r1_r5[1] = -1; |
| 35 | execute(lgfi, 1 << 4, r1_r5); |
| 36 | assert(r1_r5[0] == 0); |
| 37 | assert(r1_r5[1] == -1); |
| 38 | |
| 39 | /* Test changing the mask. */ |
| 40 | execute(lgfi, 5 << 4, r1_r5); |
| 41 | assert(r1_r5[0] == 0); |
| 42 | assert(r1_r5[1] == 0); |
| 43 | |
| 44 | /* Test changing the target. */ |
| 45 | lgfi[5] = 42; |
| 46 | execute(lgfi, 5 << 4, r1_r5); |
| 47 | assert(r1_r5[0] == 0); |
| 48 | assert(r1_r5[1] == 42); |
| 49 | |
| 50 | /* Test changing both the mask and the target. */ |
| 51 | lgfi[5] = 24; |
| 52 | execute(lgfi, 1 << 4, r1_r5); |
| 53 | assert(r1_r5[0] == 24); |
| 54 | assert(r1_r5[1] == 42); |
| 55 | |
| 56 | return EXIT_SUCCESS; |
| 57 | } |