diff options
Diffstat (limited to 'gdb/gdbserver/linux-x86-low.c')
| -rw-r--r-- | gdb/gdbserver/linux-x86-low.c | 43 |
1 files changed, 40 insertions, 3 deletions
diff --git a/gdb/gdbserver/linux-x86-low.c b/gdb/gdbserver/linux-x86-low.c index 3853b25..9754c1e 100644 --- a/gdb/gdbserver/linux-x86-low.c +++ b/gdb/gdbserver/linux-x86-low.c @@ -37,6 +37,8 @@ void init_registers_amd64_linux (void); void init_registers_i386_avx_linux (void); /* Defined in auto-generated file amd64-avx-linux.c. */ void init_registers_amd64_avx_linux (void); +/* Defined in auto-generated file i386-mmx-linux.c. */ +void init_registers_i386_mmx_linux (void); /* Backward compatibility for gdb without XML support. */ @@ -828,19 +830,56 @@ static int use_xml; static void x86_linux_update_xmltarget (void) { + int pid; + struct regset_info *regset; static unsigned long long xcr0; static int have_ptrace_getregset = -1; +#ifdef HAVE_PTRACE_GETFPXREGS + static int have_ptrace_getfpxregs = -1; +#endif if (!current_inferior) return; + pid = pid_of (get_thread_lwp (current_inferior)); #ifdef __x86_64__ if (num_xmm_registers == 8) init_registers_i386_linux (); else init_registers_amd64_linux (); #else - init_registers_i386_linux (); + { +# ifdef HAVE_PTRACE_GETFPXREGS + if (have_ptrace_getfpxregs == -1) + { + elf_fpxregset_t fpxregs; + + if (ptrace (PTRACE_GETFPXREGS, pid, 0, (int) &fpxregs) < 0) + { + have_ptrace_getfpxregs = 0; + x86_xcr0 = I386_XSTATE_X87_MASK; + + /* Disable PTRACE_GETFPXREGS. */ + for (regset = target_regsets; + regset->fill_function != NULL; regset++) + if (regset->get_request == PTRACE_GETFPXREGS) + { + regset->size = 0; + break; + } + } + else + have_ptrace_getfpxregs = 1; + } + + if (!have_ptrace_getfpxregs) + { + init_registers_i386_mmx_linux (); + return; + } +# endif + init_registers_i386_linux (); + } #endif if (!use_xml) @@ -863,10 +902,8 @@ x86_linux_update_xmltarget (void) /* Check if XSAVE extended state is supported. */ if (have_ptrace_getregset == -1) { - int pid = pid_of (get_thread_lwp (current_inferior)); unsigned long long xstateregs[I386_XSTATE_SSE_SIZE / sizeof (long long)]; struct iovec iov; - struct regset_info *regset; iov.iov_base = xstateregs; iov.iov_len = sizeof (xstateregs); |