sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 1 | |
| 2 | /* Test Heimdall's ability to spot writes to code which has been |
| 3 | translated, and discard the out-of-date translations. |
| 4 | |
| 5 | CORRECT output is |
| 6 | |
| 7 | in p 0 |
| 8 | in q 1 |
| 9 | in p 2 |
| 10 | in q 3 |
| 11 | in p 4 |
| 12 | in q 5 |
| 13 | in p 6 |
| 14 | in q 7 |
| 15 | in p 8 |
| 16 | in q 9 |
| 17 | |
| 18 | WRONG output (if you fail to spot code-writes to code[0 .. 4]) is |
| 19 | |
| 20 | in p 0 |
| 21 | in p 1 |
| 22 | in p 2 |
| 23 | in p 3 |
| 24 | in p 4 |
| 25 | in p 5 |
| 26 | in p 6 |
| 27 | in p 7 |
| 28 | in p 8 |
| 29 | in p 9 |
| 30 | */ |
| 31 | |
| 32 | #include <stdio.h> |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 33 | #include "valgrind.h" |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 34 | |
| 35 | typedef unsigned int Addr; |
| 36 | typedef unsigned char UChar; |
| 37 | |
| 38 | void q ( int n ) |
| 39 | { |
| 40 | printf("in q %d\n", n); |
| 41 | } |
| 42 | |
| 43 | void p ( int n ) |
| 44 | { |
| 45 | printf("in p %d\n", n); |
| 46 | } |
| 47 | |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 48 | UChar code[10]; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 49 | |
| 50 | /* Make `code' be JMP-32 dest */ |
| 51 | void set_dest ( Addr dest ) |
| 52 | { |
| 53 | unsigned int delta; |
| 54 | delta = dest - ((Addr)(&code[0])); |
| 55 | delta -= 5; |
| 56 | |
| 57 | code[0] = 0xE9; /* JMP d32 */ |
| 58 | code[1] = (delta & 0xFF); |
| 59 | code[2] = ((delta >> 8) & 0xFF); |
| 60 | code[3] = ((delta >> 16) & 0xFF); |
| 61 | code[4] = ((delta >> 24) & 0xFF); |
fitzhardinge | 98abfc7 | 2003-12-16 02:05:15 +0000 | [diff] [blame] | 62 | |
| 63 | /* XXX this should be automatic */ |
| 64 | VALGRIND_DISCARD_TRANSLATIONS(code, sizeof(code)); |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 65 | } |
| 66 | |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 67 | int main ( void ) |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 68 | { |
| 69 | int i; |
| 70 | for (i = 0; i < 10; i += 2) { |
| 71 | set_dest ( (Addr)&p ); |
| 72 | ( (void (*)(int)) (&code[0]) ) (i); |
| 73 | set_dest ( (Addr)&q ); |
| 74 | ( (void (*)(int)) (&code[0]) ) (i+1); |
| 75 | } |
njn25 | e49d8e7 | 2002-09-23 09:36:25 +0000 | [diff] [blame] | 76 | return 0; |
sewardj | de4a1d0 | 2002-03-22 01:27:54 +0000 | [diff] [blame] | 77 | } |