diff options
Diffstat (limited to 'tests/backtrace.c')
| -rw-r--r-- | tests/backtrace.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/tests/backtrace.c b/tests/backtrace.c index e109654f..8b19b947 100644 --- a/tests/backtrace.c +++ b/tests/backtrace.c @@ -260,9 +260,13 @@ prepare_thread (pid_t pid2 __attribute__ ((unused)), abort (); #else /* x86_64 */ long l; + struct user_regs_struct user_regs; errno = 0; - l = ptrace (PTRACE_POKEUSER, pid2, - (void *) (intptr_t) offsetof (struct user_regs_struct, rip), jmp); + l = ptrace (PTRACE_GETREGS, pid2, 0, (intptr_t) &user_regs); + assert_perror (errno); + assert (l == 0); + user_regs.rip = (intptr_t) jmp; + l = ptrace (PTRACE_SETREGS, pid2, 0, (intptr_t) &user_regs); assert_perror (errno); assert (l == 0); l = ptrace (PTRACE_CONT, pid2, NULL, (void *) (intptr_t) SIGUSR2); @@ -375,7 +379,7 @@ exec_dump (const char *exec) #ifndef __x86_64__ is_x86_64_native = false; #else /* __x86_64__ */ - is_x86_64_native = ehdr->e_ident[EI_CLASS] == ELFCLASS64; + is_x86_64_native = ehdr->e_machine == EM_X86_64; #endif /* __x86_64__ */ void (*jmp) (void) = 0; if (is_x86_64_native) |