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March 24, 2024 05:13
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Ptrace-Read-Program-Memory
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| ///////////////////////////////////////// | |
| // Title: Read Memory | |
| // Description: Use ptrace to read memory | |
| // of an executable. | |
| // Author: Ally Petitt | |
| ///////////////////////////////////////// | |
| #include <sys/ptrace.h> | |
| #include <stdio.h> | |
| #include <stdlib.h> | |
| #include <sys/types.h> | |
| #include <sys/stat.h> | |
| #include <unistd.h> | |
| #include <sys/wait.h> | |
| int read_mem(pid_t child, uint size) { | |
| short read_word; | |
| for (uint i=1; i <= size; i++) { | |
| read_word = ptrace(PTRACE_PEEKDATA, child, i, NULL); | |
| printf("%#2hhx ", read_word); | |
| if (i % 10 == 0 ) | |
| puts(""); // put newline | |
| ptrace(PTRACE_CONT, child, NULL, NULL); | |
| } | |
| ptrace(PTRACE_KILL, child, 0, 0); | |
| printf("\n%i Bytes Read\n", size); | |
| } | |
| int main(int argc, char **argv) { | |
| struct stat file_stat; | |
| off_t filename; | |
| pid_t child; | |
| if (argc != 3) { | |
| printf("Usage: %s <file_to_read> <bytes_to_read>", argv[0]); | |
| exit(1); | |
| } | |
| // Start running file | |
| child = fork(); | |
| if (child == 0) { | |
| ptrace(PTRACE_TRACEME, 0, NULL, NULL); | |
| execl(argv[1], argv[1], NULL); | |
| } else { | |
| wait(NULL); | |
| read_mem(child, (uint) atoi(argv[2])); | |
| } | |
| return 0; | |
| } |
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