diff options
| -rw-r--r-- | ChangeLog | 12 | ||||
| -rw-r--r-- | sysdeps/mach/alpha/sysdep.h | 15 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/alpha/intr-msg.h | 100 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/alpha/trampoline.c | 30 |
4 files changed, 137 insertions, 20 deletions
@@ -1,3 +1,15 @@ +2002-04-07 Roland McGrath <roland@frob.com> + + * sysdeps/mach/hurd/alpha/trampoline.c: Don't include + <mach/machine/alpha_instruction.h>. + (_hurd_setup_sighandler): Take proper arguments for current decls. + Update code to use _hurdsig_catch_fault. + Use `callsys' instruction instead of `call_pal'. + * sysdeps/mach/hurd/alpha/intr-msg.h: New file. + + * sysdeps/mach/alpha/sysdep.h: Include <mach/alpha/asm.h>. + (ALIGN, at, AT, fp): New macros. + 2002-04-06 Roland McGrath <roland@frob.com> * mach/setup-thread.c (__mach_setup_thread): int -> natural_t diff --git a/sysdeps/mach/alpha/sysdep.h b/sysdeps/mach/alpha/sysdep.h index 9e7ace0..ddd98d6 100644 --- a/sysdeps/mach/alpha/sysdep.h +++ b/sysdeps/mach/alpha/sysdep.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1994, 1997 Free Software Foundation, Inc. +/* Copyright (C) 1994,97,2002 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 @@ -34,8 +34,17 @@ asm volatile ("mov %0,$30; jmp $31, (%1); ldgp $29, 0(%1)" \ : : "r" (__sp), "r" (__fn)); }) -#define ENTRY(name) LEAF(name, ***loser no arg count***) - #define STACK_GROWTH_DOWN +#define RETURN_TO(sp, pc, retval) \ + asm volatile ("mov %0,$30; jmp $31, (%1); mov %2,$0" \ + : : "r" (sp), "r" (pc), "r" ((long int) (retval))); + +#define ALIGN 3 #include <sysdeps/mach/sysdep.h> + +#include <mach/alpha/asm.h> +#undef at +#define at 28 +#define AT $28 +#define fp s6 diff --git a/sysdeps/mach/hurd/alpha/intr-msg.h b/sysdeps/mach/hurd/alpha/intr-msg.h new file mode 100644 index 0000000..4f17212 --- /dev/null +++ b/sysdeps/mach/hurd/alpha/intr-msg.h @@ -0,0 +1,100 @@ +/* Machine-dependent details of interruptible RPC messaging. Alpha version. + Copyright (C) 2002 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#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" \ + " mov %1, $16\n" \ + " mov %2, $17\n" \ + " mov %3, $18\n" \ + " mov %4, $19\n" \ + " mov %5, $20\n" \ + " mov %6, $21\n" \ + " mov %7, $1\n" \ + " lda $0, -25\n" \ + "_hurd_intr_rpc_msg_do_trap: callsys\n" \ + "_hurd_intr_rpc_msg_in_trap: ret\n" \ + : "=r" (err) \ + : "r" (msg), "r" (option), "r" (send_size), "r" (rcv_size), \ + "r" (rcv_name), "r" (timeout), "r" (notify) \ + : "16", "17", "18", "19", "20", "21", "1", "0"); \ + err; \ +}) + +static void inline +INTR_MSG_BACK_OUT (struct alpha_thread_state *state) +{ + return; +} + +#include "hurdfault.h" + +/* This cannot be an inline function because it calls setjmp. */ +#define SYSCALL_EXAMINE(state, callno) \ +({ \ + u_int32_t *p = (void *) ((state)->pc - 4); \ + int result; \ + _hurdsig_catch_memory_fault (p) ? 0 : \ + ({ \ + result = (*p == 0x00000083); \ + _hurdsig_end_catch_fault (); \ + if (result) \ + /* The PC is just after a `callsys' instruction. \ + This is a system call in progress; v0 holds the call number. */ \ + *(callno) = (state)->r0; \ + result; \ + }); \ +}) + +struct mach_msg_trap_args + { + /* 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, rcv_name, send_name, option, timeout) \ +({ \ + mach_msg_header_t *msg = (mach_msg_header_t *) (state)->r16; \ + *(option) = (mach_msg_option_t) (state)->r17; \ + *(rcv_name) = (mach_port_t) (state)->r18; \ + *(timeout) = (mach_msg_timeout_t) (state)->r19; \ + (msg == 0) ? \ + ({ \ + *(send_name) = MACH_PORT_NULL; \ + *(msgid) = 0; \ + 0; \ + }) : \ + (_hurdsig_catch_memory_fault (msg) ? -1 : \ + ({ \ + *(send_name) = msg->msgh_remote_port; \ + *(msgid) = msg->msgh_id; \ + _hurdsig_end_catch_fault (); \ + 0; \ + }) \ + ); \ +}) diff --git a/sysdeps/mach/hurd/alpha/trampoline.c b/sysdeps/mach/hurd/alpha/trampoline.c index 152f935..2360cbb 100644 --- a/sysdeps/mach/hurd/alpha/trampoline.c +++ b/sysdeps/mach/hurd/alpha/trampoline.c @@ -1,5 +1,5 @@ /* Set thread_state for sighandler, and sigcontext to recover. Alpha version. - Copyright (C) 1994, 1995, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1994,95,97,98,2002 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 @@ -19,7 +19,6 @@ #include <hurd/signal.h> #include "thread_state.h" -#include <mach/machine/alpha_instruction.h> #include "hurdfault.h" #include <assert.h> @@ -38,9 +37,8 @@ struct mach_msg_trap_args struct sigcontext * _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, - int signo, long int sigcode, - int rpc_wait, - struct machine_thread_all_state *state) + int signo, struct hurd_signal_detail *detail, + int rpc_wait, struct machine_thread_all_state *state) { __label__ trampoline, rpc_wait_trampoline; void *sigsp; @@ -51,10 +49,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, /* We have a previous sigcontext that sigreturn was about to restore when another signal arrived. We will just base our setup on that. */ - if (_hurdsig_catch_fault (SIGSEGV)) - assert (_hurdsig_fault_sigcode >= (long int) ss->context && - _hurdsig_fault_sigcode < (long int) (ss->context + 1)); - else + if (! _hurdsig_catch_memory_fault (ss->context)) { memcpy (&state->basic, &ss->context->sc_alpha_thread_state, sizeof (state->basic)); @@ -79,6 +74,8 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, later. */ ss->intr_port = ss->context->sc_intr_port; } + _hurdsig_end_catch_fault (); + /* If the sigreturn context was bogus, just ignore it. */ ss->context = NULL; } @@ -101,10 +98,8 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, sigsp -= sizeof (*scp); scp = sigsp; - if (_hurdsig_catch_fault (SIGSEGV)) + if (_hurdsig_catch_memory_fault (scp)) { - assert (_hurdsig_fault_sigcode >= (long int) scp && - _hurdsig_fault_sigcode < (long int) (scp + 1)); /* We got a fault trying to write the stack frame. We cannot set up the signal handler. Returning NULL tells our caller, who will nuke us with a SIGILL. */ @@ -137,6 +132,8 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, &scp->sc_alpha_float_state, sizeof (state->fpu))) return NULL; + + _hurdsig_end_catch_fault (); } /* Modify the thread state to call the trampoline code on the new stack. */ @@ -176,14 +173,14 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, ($16..$21, $1). Pass the handler args to the trampoline code in t8..t10 ($22.$24). */ state->basic.r22 = signo; - state->basic.r23 = sigcode; + state->basic.r23 = detail->code; state->basic.r24 = (long int) scp; } else { state->basic.pc = (long int) &&trampoline; state->basic.r16 = signo; - state->basic.r17 = sigcode; + state->basic.r17 = detail->code; state->basic.r18 = (long int) scp; } @@ -212,7 +209,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, asm volatile (/* Retry the interrupted mach_msg system call. */ "lda $0, -25($31)\n" /* mach_msg_trap */ - "call_pal %0\n" /* Magic system call instruction. */ + "callsys\n" /* Magic system call instruction. */ /* When the sigcontext was saved, v0 was MACH_RCV_INTERRUPTED. But now the message receive has completed and the original caller of the RPC (i.e. the code running when the signal arrived) needs to @@ -225,8 +222,7 @@ _hurd_setup_sighandler (struct hurd_sigstate *ss, __sighandler_t handler, in registers t8..t10 ($22..$24). */ "mov $22, $16\n" "mov $23, $17\n" - "mov $24, $18\n" - : : "i" (op_chmk)); + "mov $24, $18\n"); trampoline: /* Entry point for running the handler normally. The arguments to the |