diff options
Diffstat (limited to 'gdb/i386-linux-nat.c')
| -rw-r--r-- | gdb/i386-linux-nat.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/gdb/i386-linux-nat.c b/gdb/i386-linux-nat.c index a251907d502..d5598114878 100644 --- a/gdb/i386-linux-nat.c +++ b/gdb/i386-linux-nat.c @@ -150,7 +150,7 @@ int have_ptrace_getregs = for this to be a simple variable. */ int have_ptrace_getfpxregs = #ifdef HAVE_PTRACE_GETFPXREGS - 1 + -1 #else 0 #endif @@ -946,19 +946,33 @@ i386_linux_child_post_startup_inferior (ptid_t ptid) static const struct target_desc * i386_linux_read_description (struct target_ops *ops) { + int tid; static uint64_t xcr0; + /* GNU/Linux LWP ID's are process ID's. */ + tid = TIDGET (inferior_ptid); + if (tid == 0) + tid = PIDGET (inferior_ptid); /* Not a threaded program. */ + +#ifdef HAVE_PTRACE_GETFPXREGS + if (have_ptrace_getfpxregs == -1) + { + elf_fpxregset_t fpxregs; + + if (ptrace (PTRACE_GETFPXREGS, tid, 0, (int) &fpxregs) < 0) + { + have_ptrace_getfpxregs = 0; + have_ptrace_getregset = 0; + return tdesc_i386_mmx_linux; + } + } +#endif + if (have_ptrace_getregset == -1) { - int tid; uint64_t xstateregs[(I386_XSTATE_SSE_SIZE / sizeof (uint64_t))]; struct iovec iov; - /* GNU/Linux LWP ID's are process ID's. */ - tid = TIDGET (inferior_ptid); - if (tid == 0) - tid = PIDGET (inferior_ptid); /* Not a threaded program. */ - iov.iov_base = xstateregs; iov.iov_len = sizeof (xstateregs); |