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// RUN: %clangxx -O0 %s -o %t && %run %t
#include <assert.h>
#include <signal.h>
#include <stdio.h>
#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/user.h>
#include <sys/wait.h>
#include <sys/uio.h>
#include <unistd.h>
#include <elf.h>
#if __mips64 || __arm__
#include <asm/ptrace.h>
#include <sys/procfs.h>
#endif
#ifdef __aarch64__
// GLIBC 2.20+ sys/user does not include asm/ptrace.h
#include <asm/ptrace.h>
#endif
int main(void) {
pid_t pid;
pid = fork();
if (pid == 0) { // child
ptrace(PTRACE_TRACEME, 0, NULL, NULL);
execl("/bin/true", "true", NULL);
} else {
wait(NULL);
int res;
#if __x86_64__
user_regs_struct regs;
res = ptrace(PTRACE_GETREGS, pid, NULL, ®s);
assert(!res);
if (regs.rip)
printf("%zx\n", regs.rip);
user_fpregs_struct fpregs;
res = ptrace(PTRACE_GETFPREGS, pid, NULL, &fpregs);
assert(!res);
if (fpregs.mxcsr)
printf("%x\n", fpregs.mxcsr);
#endif // __x86_64__
#if (__powerpc64__ || __mips64 || __arm__)
struct pt_regs regs;
res = ptrace((enum __ptrace_request)PTRACE_GETREGS, pid, NULL, ®s);
assert(!res);
#if (__powerpc64__)
if (regs.nip)
printf("%lx\n", regs.nip);
#elif (__mips64)
if (regs.cp0_epc)
printf("%lx\n", regs.cp0_epc);
#elif (__arm__)
if (regs.ARM_pc)
printf("%lx\n", regs.ARM_pc);
#endif
#if (__powerpc64 || __mips64)
elf_fpregset_t fpregs;
res = ptrace((enum __ptrace_request)PTRACE_GETFPREGS, pid, NULL, &fpregs);
assert(!res);
if ((elf_greg_t)fpregs[32]) // fpscr
printf("%lx\n", (elf_greg_t)fpregs[32]);
#elif (__arm__)
char regbuf[ARM_VFPREGS_SIZE];
res = ptrace((enum __ptrace_request)PTRACE_GETVFPREGS, pid, 0, regbuf);
assert(!res);
unsigned fpscr = *(unsigned*)(regbuf + (32 * 8));
printf ("%x\n", fpscr);
#endif
#endif // (__powerpc64__ || __mips64 || __arm__)
#if (__aarch64__)
struct iovec regset_io;
struct user_pt_regs regs;
regset_io.iov_base = ®s;
regset_io.iov_len = sizeof(regs);
res = ptrace(PTRACE_GETREGSET, pid, (void*)NT_PRSTATUS, (void*)®set_io);
assert(!res);
if (regs.pc)
printf("%llx\n", regs.pc);
struct user_fpsimd_state fpregs;
regset_io.iov_base = &fpregs;
regset_io.iov_len = sizeof(fpregs);
res = ptrace(PTRACE_GETREGSET, pid, (void*)NT_FPREGSET, (void*)®set_io);
assert(!res);
if (fpregs.fpsr)
printf("%x\n", fpregs.fpsr);
#endif // (__aarch64__)
siginfo_t siginfo;
res = ptrace(PTRACE_GETSIGINFO, pid, NULL, &siginfo);
assert(!res);
assert(siginfo.si_pid == pid);
ptrace(PTRACE_CONT, pid, NULL, NULL);
wait(NULL);
}
return 0;
}
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