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101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
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/* Machine-dependent details of interruptible RPC messaging. Alpha version.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#define INTR_MSG_TRAP(msg, option, send_size, rcv_size, rcv_name, timeout, notify) \
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({ \
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error_t err; \
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asm (".globl _hurd_intr_rpc_msg_do_trap\n" \
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".globl _hurd_intr_rpc_msg_in_trap\n" \
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" mov %1, $16\n" \
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" mov %2, $17\n" \
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" mov %3, $18\n" \
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" mov %4, $19\n" \
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" mov %5, $20\n" \
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" mov %6, $21\n" \
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" mov %7, $1\n" \
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" lda $0, -25\n" \
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"_hurd_intr_rpc_msg_do_trap: callsys\n" \
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"_hurd_intr_rpc_msg_in_trap: ret\n" \
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: "=r" (err) \
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: "r" (msg), "r" (option), "r" (send_size), "r" (rcv_size), \
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"r" (rcv_name), "r" (timeout), "r" (notify) \
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: "16", "17", "18", "19", "20", "21", "1", "0"); \
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err; \
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})
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static void inline
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INTR_MSG_BACK_OUT (struct alpha_thread_state *state)
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{
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return;
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}
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#include "hurdfault.h"
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/* This cannot be an inline function because it calls setjmp. */
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#define SYSCALL_EXAMINE(state, callno) \
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({ \
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u_int32_t *p = (void *) ((state)->pc - 4); \
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int result; \
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_hurdsig_catch_memory_fault (p) ? 0 : \
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({ \
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result = (*p == 0x00000083); \
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_hurdsig_end_catch_fault (); \
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if (result) \
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/* The PC is just after a `callsys' instruction. \
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This is a system call in progress; v0 holds the call number. */ \
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*(callno) = (state)->r0; \
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result; \
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}); \
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})
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struct mach_msg_trap_args
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{
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/* This is the order of arguments to mach_msg_trap. */
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mach_msg_header_t *msg;
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mach_msg_option_t option;
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mach_msg_size_t send_size;
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mach_msg_size_t rcv_size;
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mach_port_t rcv_name;
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mach_msg_timeout_t timeout;
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mach_port_t notify;
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};
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/* This cannot be an inline function because it calls setjmp. */
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#define MSG_EXAMINE(state, msgid, rcv_name, send_name, option, timeout) \
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({ \
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mach_msg_header_t *msg = (mach_msg_header_t *) (state)->r16; \
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*(option) = (mach_msg_option_t) (state)->r17; \
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*(rcv_name) = (mach_port_t) (state)->r18; \
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*(timeout) = (mach_msg_timeout_t) (state)->r19; \
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(msg == 0) ? \
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({ \
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*(send_name) = MACH_PORT_NULL; \
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*(msgid) = 0; \
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0; \
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}) : \
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(_hurdsig_catch_memory_fault (msg) ? -1 : \
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({ \
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*(send_name) = msg->msgh_remote_port; \
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*(msgid) = msg->msgh_id; \
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_hurdsig_end_catch_fault (); \
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0; \
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}) \
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); \
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})
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