67 lines
1.1 KiB
C
67 lines
1.1 KiB
C
#include<stdio.h>
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#include<stdlib.h>
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#include<unistd.h>
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#include<sys/types.h>
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#include<sys/ptrace.h>
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#include<sys/user.h>
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#include<sys/wait.h>
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#define DONT_CARE 0
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int stats;
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struct user_regs_struct regs;
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void continue_execution(pid_t pid)
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{
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ptrace(PTRACE_CONT, pid, DONT_CARE, DONT_CARE);
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waitpid(pid, &stats, 0);
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return;
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}
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void print_rax(pid_t pid)
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{
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ptrace(PTRACE_GETREGS, pid, DONT_CARE, ®s);
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printf("rax = %llu\n", regs.rax);
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return;
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}
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void step(pid_t pid)
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{
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ptrace(PTRACE_SINGLESTEP, pid, DONT_CARE, DONT_CARE);
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waitpid(pid, &stats, 0);
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return;
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}
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int main()
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{
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printf("procces is run ");
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pid_t pid;
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pid = fork();
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if (pid==0)
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{
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printf(" -- child\n");
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ptrace(PTRACE_TRACEME, 0, 0, 0);
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execl("./testee", "testee", NULL);
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printf("____AFTER_TRACE_CHILD____\n");
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}
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else if(pid > 0)
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{
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char buff;
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printf(" -- parrent\n");
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continue_execution(pid); // to start app
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continue_execution(pid);
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if (stats & SIGTRAP)
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{
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while (stats != 0)
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{
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read(0, &buff, 1);
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print_rax(pid);
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step(pid);
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}
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}
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printf("____AFTER_TRACE_PARRENT____\n");
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}
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return 0;
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}
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