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Roland McGrath
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83
sysdeps/mach/alpha/machine-lock.h
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83
sysdeps/mach/alpha/machine-lock.h
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@ -0,0 +1,83 @@
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/* Machine-specific definition for spin locks. Alpha version.
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Copyright (C) 1994 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#ifndef _MACHINE_LOCK_H
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#define _MACHINE_LOCK_H
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/* The type of a spin lock variable. */
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typedef __volatile long int __spin_lock_t;
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/* Value to initialize `__spin_lock_t' variables to. */
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#define __SPIN_LOCK_INITIALIZER 0L
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#ifndef _EXTERN_INLINE
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#define _EXTERN_INLINE extern __inline
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#endif
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/* Unlock LOCK. */
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_EXTERN_INLINE void
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__spin_unlock (__spin_lock_t *__lock)
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{
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__asm__ __volatile__ (".set noreorder\n"
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"mb; stq $31, %0; mb\n"
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".set reorder"
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: "=m" (__lock));
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}
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/* Try to lock LOCK; return nonzero if we locked it, zero if another has. */
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_EXTERN_INLINE int
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__spin_try_lock (register __spin_lock_t *__lock)
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{
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register long int __rtn, __tmp;
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do
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{
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__asm__ __volatile__ (".set noreorder\n"
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/* %0 is TMP, %1 is RTN, %2 is LOCK. */
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"mb; ldq_l %0,%2\n" /* Load lock into TMP. */
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"or $31,2,%1\n" /* Locked value in RTN. */
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".set reorder"
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: "=r" (__tmp), "=r" (__rtn) : "m" (__lock));
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if (__tmp)
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/* The lock is already taken. */
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return 0;
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/* The lock is not taken; try to get it now. */
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__asm__ __volatile__ ("stq_c %0,%1" : "+r" (__rtn), "+m" (__lock));
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/* RTN is clear if stq_c was interrupted; loop to try the lock again. */
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} while (! __rtn);
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/* RTN is now nonzero; we have the lock. */
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return __rtn;
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}
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/* Return nonzero if LOCK is locked. */
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_EXTERN_INLINE int
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__spin_lock_locked (__spin_lock_t *__lock)
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{
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return *__lock != 0;
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}
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#endif /* machine-lock.h */
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@ -1,4 +1,4 @@
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/* Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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/* Copyright (C) 1994 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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@ -20,7 +20,14 @@ Cambridge, MA 02139, USA. */
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#define LOSE asm volatile ("call_pal 0") /* halt */
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/* XXX SNARF_ARGS */
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#define START_MACHDEP \
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asm ("_start: mov $30, $16\n" /* Put initial SP in a0. */
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" br $27, 1f\n" /* Load GP from PC. */
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"1: ldgp $29, 0($27)\n"
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" jmp $26, _start0"); /* Jump to _start0; don't return. */
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#define START_ARGS char **sp
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#define SNARF_ARGS(argc, argv, envp) \
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(envp = &(argv = &sp[1])[(argc = *(int *) sp) + 1])
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#define CALL_WITH_SP(fn, sp) \
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({ register long int __fn = fn, __sp = (long int) sp; \
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76
sysdeps/mach/hurd/alpha/exc2signal.c
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76
sysdeps/mach/hurd/alpha/exc2signal.c
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/* Translate Mach exception codes into signal numbers. Alpha version.
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Copyright (C) 1994 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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#include <hurd/signal.h>
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#include <mach/exception.h>
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/* Translate the Mach exception codes, as received in an `exception_raise' RPC,
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into a signal number and signal subcode. */
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void
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_hurd_exception2signal (int exception, int code, int subcode,
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int *signo, int *sigcode, int *error)
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{
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*error = 0;
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switch (exception)
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{
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default:
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*signo = SIGIOT;
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*sigcode = exception;
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break;
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case EXC_BAD_ACCESS:
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if (code == KERN_PROTECTION_FAILURE)
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*signo = SIGSEGV;
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else
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*signo = SIGBUS;
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*sigcode = subcode;
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*error = code;
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break;
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case EXC_BAD_INSTRUCTION:
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*signo = SIGILL;
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*sigcode = code;
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break;
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case EXC_ARITHMETIC:
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*signo = SIGFPE;
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*sigcode = code;
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break;
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break;
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case EXC_EMULATION:
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/* 3.0 doesn't give this one, why, I don't know. */
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*signo = SIGEMT;
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*sigcode = code;
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break;
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case EXC_SOFTWARE:
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*signo = SIGEMT;
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*sigcode = code;
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break;
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case EXC_BREAKPOINT:
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*signo = SIGTRAP;
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*sigcode = code;
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break;
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}
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}
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@ -25,14 +25,14 @@ struct sigcontext
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{
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/* These first members are machine-independent. */
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int sc_onstack; /* Nonzero if running on sigstack. */
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long int sc_onstack; /* Nonzero if running on sigstack. */
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sigset_t sc_mask; /* Blocked signals to restore. */
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/* MiG reply port this thread is using. */
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unsigned int sc_reply_port;
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unsigned long int sc_reply_port;
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/* Port this thread is doing an interruptible RPC on. */
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unsigned int sc_intr_port;
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unsigned long int sc_intr_port;
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/* Error code associated with this signal (interpreted as `error_t'). */
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int sc_error;
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@ -41,16 +41,25 @@ struct sigcontext
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structure is written to be laid out identically to:
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{
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struct alpha_thread_state basic;
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struct alpha_exc_state exc;
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struct alpha_float_state fpu;
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}
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trampoline.c knows this, so it must be changed if this changes. */
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#define sc_alpha_thread_state sc_gs /* Beginning of correspondence. */
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#define sc_alpha_thread_state sc_regs /* Beginning of correspondence. */
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long int sc_regs[31]; /* General registers $0..$30. */
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long int sc_pc; /* Program counter. */
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long int sc_ps; /* Processor status. */
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/* struct alpha_float_state */
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/* struct mips_exc_state */
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#define sc_alpha_exc_state sc_badvaddr
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unsigned long int sc_badvaddr;
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unsigned int sc_cause; /* Machine-level trap code. */
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#define SC_CAUSE_SET_SSTEP 1
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int sc_used_fpa; /* Nonzero if FPU was used. */
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/* struct alpha_float_state
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This is only filled in if sc_used_fpa is nonzero. */
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#define sc_alpha_float_state sc_fpregs
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long int sc_fpregs[32]; /* Floating point registers $f0..$f31. */
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double sc_fpregs[31]; /* Floating point registers $f0..$f30. */
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long int sc_fpcsr; /* Floating point control/status register. */
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};
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