diff options
Diffstat (limited to 'REORG.TODO/sysdeps/mach/hurd/i386/intr-msg.h')
| -rw-r--r-- | REORG.TODO/sysdeps/mach/hurd/i386/intr-msg.h | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/mach/hurd/i386/intr-msg.h b/REORG.TODO/sysdeps/mach/hurd/i386/intr-msg.h new file mode 100644 index 0000000000..43cd79bc28 --- /dev/null +++ b/REORG.TODO/sysdeps/mach/hurd/i386/intr-msg.h @@ -0,0 +1,112 @@ +/* Machine-dependent details of interruptible RPC messaging. i386 version. + Copyright (C) 1995-2017 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/>. */ + + +/* Note that we must mark OPTION and TIMEOUT as outputs of this operation, + to indicate that the signal thread might mutate them as part + of sending us to a signal handler. */ +#define INTR_MSG_TRAP(msg, option, send_size, rcv_size, rcv_name, timeout, notify) \ +({ \ + error_t err; \ + asm (".globl _hurd_intr_rpc_msg_do_trap\n" \ + ".globl _hurd_intr_rpc_msg_in_trap\n" \ + ".globl _hurd_intr_rpc_msg_cx_sp\n" \ + ".globl _hurd_intr_rpc_msg_sp_restored\n" \ + " movl %%esp, %%ecx\n" \ + " leal %3, %%esp\n" \ + "_hurd_intr_rpc_msg_cx_sp: movl $-25, %%eax\n" \ + "_hurd_intr_rpc_msg_do_trap: lcall $7, $0 # status in %0\n" \ + "_hurd_intr_rpc_msg_in_trap: movl %%ecx, %%esp\n" \ + "_hurd_intr_rpc_msg_sp_restored:" \ + : "=a" (err), "+m" (option), "+m" (timeout) \ + : "m" ((&msg)[-1]) \ + : "ecx"); \ + err; \ +}) + + +static void inline +INTR_MSG_BACK_OUT (struct i386_thread_state *state) +{ + extern const void _hurd_intr_rpc_msg_cx_sp; + if (state->eip >= (natural_t) &_hurd_intr_rpc_msg_cx_sp) + state->uesp = state->ecx; + else + state->ecx = state->uesp; +} + +#include "hurdfault.h" + +/* This cannot be an inline function because it calls setjmp. */ +#define SYSCALL_EXAMINE(state, callno) \ +({ \ + struct { unsigned int c[2]; } *p = (void *) ((state)->eip - 7); \ + int result; \ + if (_hurdsig_catch_memory_fault (p)) \ + return 0; \ + if (result = p->c[0] == 0x0000009a && (p->c[1] & 0x00ffffff) == 0x00000700) \ + /* The PC is just after an `lcall $7,$0' instruction. \ + This is a system call in progress; %eax holds the call number. */ \ + *(callno) = (state)->eax; \ + _hurdsig_end_catch_fault (); \ + result; \ +}) + + +struct mach_msg_trap_args + { + void *retaddr; /* Address mach_msg_trap will return to. */ + /* This is the order of arguments to mach_msg_trap. */ + mach_msg_header_t *msg; + mach_msg_option_t option; + mach_msg_size_t send_size; + mach_msg_size_t rcv_size; + mach_port_t rcv_name; + mach_msg_timeout_t timeout; + mach_port_t notify; + }; + + +/* This cannot be an inline function because it calls setjmp. */ +#define MSG_EXAMINE(state, msgid, rcvname, send_name, opt, tmout) \ +({ \ + const struct mach_msg_trap_args *args = (const void *) (state)->uesp; \ + mach_msg_header_t *msg; \ + _hurdsig_catch_memory_fault (args) ? -1 : \ + ({ \ + msg = args->msg; \ + *(opt) = args->option; \ + *(tmout) = args->timeout; \ + *(rcvname) = args->rcv_name; \ + _hurdsig_end_catch_fault (); \ + if (msg == 0) \ + { \ + *(send_name) = MACH_PORT_NULL; \ + *(msgid) = 0; \ + } \ + else \ + { \ + if (_hurdsig_catch_memory_fault (msg)) \ + return -1; \ + *(send_name) = msg->msgh_remote_port; \ + *(msgid) = msg->msgh_id; \ + _hurdsig_end_catch_fault (); \ + } \ + 0; \ + }); \ +}) |