diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/thread_state.h')
-rw-r--r-- | REORG.TODO/sysdeps/mach/thread_state.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/thread_state.h b/REORG.TODO/sysdeps/mach/thread_state.h new file mode 100644 index 0000000000..1a154cd0fa --- /dev/null +++ b/REORG.TODO/sysdeps/mach/thread_state.h @@ -0,0 +1,86 @@ +/* Generic definitions for dealing with Mach thread states. + Copyright (C) 1994-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + + +/* Everything else is called `thread_state', but CMU's header file is + called `thread_status'. Oh boy. */ +#include <mach/thread_status.h> + +/* The machine-dependent thread_state.h file can either define these + macros, or just define PC and SP to the register names. */ + +#ifndef MACHINE_THREAD_STATE_SET_PC +#define MACHINE_THREAD_STATE_SET_PC(ts, pc) \ + ((ts)->PC = (unsigned long int) (pc)) +#endif +#ifndef MACHINE_THREAD_STATE_SET_SP +#ifdef STACK_GROWTH_UP +#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \ + ((ts)->SP = (unsigned long int) (stack)) +#else +#define MACHINE_THREAD_STATE_SET_SP(ts, stack, size) \ + ((ts)->SP = (unsigned long int) (stack) + (size)) +#endif +#endif + +/* These functions are of use in machine-dependent signal trampoline + implementations. */ + +#include <string.h> /* size_t, memcpy */ +#include <mach/mach_interface.h> /* __thread_get_state */ + +static inline int +machine_get_state (thread_t thread, struct machine_thread_all_state *state, + int flavor, void *stateptr, void *scpptr, size_t size) +{ + if (state->set & (1 << flavor)) + { + /* Copy the saved state. */ + memcpy (scpptr, stateptr, size); + return 1; + } + else + { + /* No one asked about this flavor of state before; fetch the state + directly from the kernel into the sigcontext. */ + mach_msg_type_number_t got = (size / sizeof (int)); + return (! __thread_get_state (thread, flavor, scpptr, &got) + && got == (size / sizeof (int))); + } +} + +static inline int +machine_get_basic_state (thread_t thread, + struct machine_thread_all_state *state) +{ + mach_msg_type_number_t count; + + if (state->set & (1 << MACHINE_THREAD_STATE_FLAVOR)) + return 1; + + count = MACHINE_THREAD_STATE_COUNT; + if (__thread_get_state (thread, MACHINE_THREAD_STATE_FLAVOR, + (natural_t *) &state->basic, + &count) != KERN_SUCCESS || + count != MACHINE_THREAD_STATE_COUNT) + /* What kind of thread?? */ + return 0; /* XXX */ + + state->set |= 1 << MACHINE_THREAD_STATE_FLAVOR; + return 1; +} |