Timo Juhani Lindfors wrote:
>
> Bilal Mehdi writes:
>> Please tell me if you know how to use ptrace for arm architecture
>> ... and if you know any other way to use ptrace ... please tell
>
> Don't use PEEKUSER. use PTRACE_GETREGS.
>
> apt-get source strace
>
> shows that it does
>
> #elif defined (ARM)
> /*
> * Read complete register set in one go.
> */
> if (ptrace(PTRACE_GETREGS, pid, NULL, (void *)®s) == -1)
> return -1;
>
>
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>
I want to know system call number, after your method, I print
regs.ARM_ORIG_r0. it's 0
and i find out none of them is the right one.
i make a system call execve, it's system call number is 11, but none of the
regs is 11.
Please tell me how should i do to get system call number .
my code is as follow:
int main()
{
pid_t child;
struct pt_regs reg;
child = fork();
if (child == 0){
ptrace(PTRACE_TRACEME, 0, NULL, NULL);
execl("/bin/ls", "ls", NULL);
}
else {
wait(NULL);
if (ptrace(PTRACE_GETREGS, child, NULL, ®) == -1)
printf("get regs failed\n");
printf("The child make a system call %ld\n", reg.ARM_ORIG_r0);
ptrace(PTRACE_CONT, child, NULL, NULL);
}
return 0;
}
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