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* sysdeps/mach/hurd/alpha/trampoline.c: Don't include

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<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.
This commit is contained in:
Roland McGrath 2002-04-08 07:06:57 +00:00
parent 7ce93726fb
commit f899db6094
4 changed files with 137 additions and 20 deletions
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12
ChangeLog
View File

@ -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

15
sysdeps/mach/alpha/sysdep.h
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@ -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

100
sysdeps/mach/hurd/alpha/intr-msg.h Normal file
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@ -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; \
}) \
); \
})

30
sysdeps/mach/hurd/alpha/trampoline.c
View File

@ -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