diff options
| author | H.J. Lu <[email protected]> | 2015-03-12 12:14:43 -0700 |
|---|---|---|
| committer | Mark Wielaard <[email protected]> | 2015-03-13 16:06:23 +0100 |
| commit | be7ea70f3fc2be7a39dc210a70e92109b5d9ef5d (patch) | |
| tree | 9bdd2807d52d96f943a664dc162e358bad56eeb6 /tests/backtrace.c | |
| parent | cbf25bb674320ad595707d2592799381979d85f3 (diff) | |
tests: Use PTRACE_GETREGS/PTRACE_SETREGS to update rip
Use PTRACE_POKEUSER to update rip is unsupported for x32. We should use
PTRACE_GETREGS/PTRACE_SETREGS to update rip.
Signed-off-by: H.J. Lu <[email protected]>
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) |