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* libc/include/sys/config.h: Dynamic reentrancy for or1k sys targets * libc/sys/or1k/: New system for or1k baremetal * libc/sys/or1k/Makefile.am: New file * libc/sys/or1k/Makefile.in: New file * libc/sys/or1k/aclocal.m4: New file * libc/sys/or1k/configure.in: New file * libc/sys/or1k/configure: New file * libc/sys/or1k/getreent.S: New file * libc/sys/or1k/mlock.S: New file * libc/sys/or1k/or1k-asm.S: New filecygwin-2.0
Corinna Vinschen
12 years ago
10 changed files with 6749 additions and 0 deletions
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## Process this file with automake to generate Makefile.in
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AUTOMAKE_OPTIONS = cygnus |
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# Makefile.in generated by automake 1.12.2 from Makefile.am.
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# @configure_input@
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# Copyright (C) 1994-2012 Free Software Foundation, Inc.
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# This Makefile.in is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
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# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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install-dvi: install-dvi-am |
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install-dvi-am: |
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install-exec-am: |
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|
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install-html: install-html-am |
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install-html-am: |
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install-info: install-info-am |
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install-info-am: |
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install-man: |
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install-pdf: install-pdf-am |
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install-pdf-am: |
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install-ps: install-ps-am |
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|
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install-ps-am: |
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|
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installcheck-am: |
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|
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maintainer-clean: maintainer-clean-am |
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-rm -f $(am__CONFIG_DISTCLEAN_FILES) |
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-rm -rf $(top_srcdir)/autom4te.cache |
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-rm -f Makefile |
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maintainer-clean-am: distclean-am maintainer-clean-generic |
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|
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mostlyclean: mostlyclean-am |
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|
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mostlyclean-am: mostlyclean-compile mostlyclean-generic |
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|
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pdf: pdf-am |
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|
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pdf-am: |
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|
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ps: ps-am |
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|
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ps-am: |
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|
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uninstall-am: |
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|
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.MAKE: install-am install-strip |
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|
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.PHONY: CTAGS GTAGS all all-am am--refresh check check-am clean \ |
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clean-cscope clean-generic clean-noinstLIBRARIES cscope \
|
|||
cscopelist ctags distclean distclean-compile distclean-generic \
|
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distclean-tags dvi dvi-am html html-am info info-am install \
|
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install-am install-data install-data-am install-dvi \
|
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install-dvi-am install-exec install-exec-am install-html \
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install-html-am install-info install-info-am install-man \
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install-pdf install-pdf-am install-ps install-ps-am \
|
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install-strip installcheck installcheck-am installdirs \
|
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maintainer-clean maintainer-clean-generic mostlyclean \
|
|||
mostlyclean-compile mostlyclean-generic pdf pdf-am ps ps-am \
|
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tags uninstall uninstall-am |
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|
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|
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# Tell versions [3.59,3.63) of GNU make to not export all variables.
|
|||
# Otherwise a system limit (for SysV at least) may be exceeded.
|
|||
.NOEXPORT: |
|||
File diff suppressed because it is too large
File diff suppressed because it is too large
@ -0,0 +1,14 @@ |
|||
dnl This is the newlib/libc/sys/arm configure.in file. |
|||
dnl Process this file with autoconf to produce a configure script. |
|||
|
|||
AC_PREREQ(2.59) |
|||
AC_INIT([newlib],[NEWLIB_VERSION]) |
|||
AC_CONFIG_SRCDIR([getreent.S]) |
|||
|
|||
dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake. |
|||
AC_CONFIG_AUX_DIR(../../../..) |
|||
|
|||
NEWLIB_CONFIGURE(../../..) |
|||
|
|||
AC_CONFIG_FILES([Makefile]) |
|||
AC_OUTPUT |
|||
@ -0,0 +1,26 @@ |
|||
/* getreent.S. Return reentrancy pointer. |
|||
|
|||
Copyright (C) 2014, Authors |
|||
|
|||
Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> |
|||
|
|||
* The authors hereby grant permission to use, copy, modify, distribute, |
|||
* and license this software and its documentation for any purpose, provided |
|||
* that existing copyright notices are retained in all copies and that this |
|||
* notice is included verbatim in any distributions. No written agreement, |
|||
* license, or royalty fee is required for any of the authorized uses. |
|||
* Modifications to this software may be copyrighted by their authors |
|||
* and need not follow the licensing terms described here, provided that |
|||
* the new terms are clearly indicated on the first page of each file where |
|||
* they apply. |
|||
*/ |
|||
|
|||
#include "or1k-asm.h" |
|||
|
|||
.extern _or1k_libc_getreent |
|||
|
|||
.global __getreent |
|||
.type __getreent,@function |
|||
|
|||
__getreent: |
|||
OR1K_DELAYED_NOP(OR1K_INST(l.j _or1k_libc_getreent)) |
|||
@ -0,0 +1,90 @@ |
|||
/* malloc-lock.c. Lock malloc.
|
|||
* |
|||
* Copyright (C) 2014, Authors |
|||
* |
|||
* Contributor Stefan Wallentowitz <stefan.wallentowitz@tum.de> |
|||
* |
|||
* The authors hereby grant permission to use, copy, modify, distribute, |
|||
* and license this software and its documentation for any purpose, provided |
|||
* that existing copyright notices are retained in all copies and that this |
|||
* notice is included verbatim in any distributions. No written agreement, |
|||
* license, or royalty fee is required for any of the authorized uses. |
|||
* Modifications to this software may be copyrighted by their authors |
|||
* and need not follow the licensing terms described here, provided that |
|||
* the new terms are clearly indicated on the first page of each file where |
|||
* they apply. |
|||
*/ |
|||
|
|||
#include <reent.h> |
|||
#include <or1k-support.h> |
|||
|
|||
/* Lock calls from different cores, but allows recursive calls from the same
|
|||
* core. The lock is not only atomic to other cores calling malloc, but also |
|||
* disables all external interrupts. This is necessary as it could otherwise |
|||
* lead to a deadlock to interrupt while in malloc and then call it from an |
|||
* exception. But as we want the exceptions to be flexible to use all library |
|||
* calls and especially memory management this is necessary. |
|||
*/ |
|||
|
|||
// The lock. It is zero when unlocked and contains a unique value for each core.
|
|||
// This value is not the core id (to avoid id zero), but the pointer value of
|
|||
// the core specific struct _reent.
|
|||
volatile uint32_t _or1k_malloc_lock; |
|||
|
|||
// Count how often the current holder has entered the lock
|
|||
volatile uint32_t _or1k_malloc_lock_cnt; |
|||
// The exception enable restore of the current mutex holder
|
|||
volatile uint32_t _or1k_malloc_lock_restore; |
|||
|
|||
/**
|
|||
* Recursive lock of the malloc |
|||
*/ |
|||
void __malloc_lock(struct _reent *ptr) { |
|||
uint32_t restore; |
|||
uint32_t id; |
|||
|
|||
// Each core is identified by its struct _reent pointer
|
|||
id = (uint32_t) ptr; |
|||
|
|||
// Disable timer and interrupt exception, save TEE and IEE flag
|
|||
// temporarily to restore them later on unlock
|
|||
restore = or1k_critical_begin(); |
|||
|
|||
// We cannot be disturbed by an interrupt or timer exception from here
|
|||
|
|||
// Check if we currently don't hold the lock
|
|||
if (_or1k_malloc_lock != id) { |
|||
do { |
|||
// Repeatedly check the lock until it is set to zero
|
|||
while (_or1k_malloc_lock != 0) {} |
|||
// .. and then try to set it atomically. As this may
|
|||
// fail, we need to repeat this
|
|||
} while (or1k_sync_cas(&_or1k_malloc_lock, 0, id) != 0); |
|||
} |
|||
|
|||
// Store the TEE and IEE flags for later restore
|
|||
_or1k_malloc_lock_restore = restore; |
|||
|
|||
// Increment counter. The lock may be accessed recursively
|
|||
_or1k_malloc_lock_cnt++; |
|||
|
|||
return; |
|||
} |
|||
|
|||
void __malloc_unlock(struct _reent *ptr) { |
|||
// Decrement counter. The lock may be unlocked recursively
|
|||
_or1k_malloc_lock_cnt--; |
|||
|
|||
// If this was the last recursive unlock call
|
|||
if(_or1k_malloc_lock_cnt == 0){ |
|||
// We need to temporarily store the value to avoid a race
|
|||
// condition between unlocking and reading restore
|
|||
uint32_t restore = _or1k_malloc_lock_restore; |
|||
// unset lock
|
|||
_or1k_malloc_lock = 0; |
|||
// Restore flags
|
|||
or1k_critical_end(_or1k_malloc_lock_restore); |
|||
} |
|||
|
|||
return; |
|||
} |
|||
@ -0,0 +1,83 @@ |
|||
/* or1k-asm.h -- OR1K assembly helper macros
|
|||
|
|||
Copyright (c) 2014 OpenRISC Project Maintainers |
|||
Copyright (C) 2012-2014 Peter Gavin <pgavin@gmail.com> |
|||
All rights reserved. |
|||
|
|||
Redistribution and use in source and binary forms, with or without |
|||
modification, are permitted provided that the following condition |
|||
is met: |
|||
|
|||
1. Redistributions of source code must retain the above copyright |
|||
notice, this list of conditions and the following disclaimer. |
|||
|
|||
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
|||
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
|||
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
|||
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
|||
COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
|||
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|||
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
|||
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
|||
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
|||
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
|||
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
|||
OF THE POSSIBILITY OF SUCH DAMAGE. |
|||
|
|||
*/ |
|||
|
|||
#ifndef OR1K_ASM_H |
|||
#define OR1K_ASM_H |
|||
|
|||
/* The purpose of the OR1K_INST macro is simply to protect the commas
|
|||
embedded within an instruction from the C preprocessor. An entire |
|||
instruction can be safely embedded within its arguments, including |
|||
an arbitrary number of commas, and it will be reproduced |
|||
exactly. */ |
|||
#define OR1K_INST(...) __VA_ARGS__ |
|||
|
|||
/* OR1K_DELAYED takes two arguments which must be instructions. They
|
|||
should be wrapped in OR1K_INST if the instructions require commas. |
|||
The second argument should be a jump or branch instruction. If we |
|||
are assembling the code in delay-slot mode (e.g., for the standard |
|||
OR1K) the first instruction will be emitted in the delay slot of |
|||
the second instruction. In no-delay-slot mode they will be emitted |
|||
in order. If we are using compat-delay mode, they will be emitted |
|||
in order, but an l.nop instruction will be emitted immediately |
|||
after. */ |
|||
|
|||
/* OR1K_DELAYED_NOP takes a single argument, which should be a
|
|||
branch/jump instruction. In delay-slot or compat-delay modes, the |
|||
instruction will be emitted with an l.nop in its delay slot. In |
|||
no-delay mode, the instruction will be emitted by itself. */ |
|||
|
|||
#if defined(__OR1K_NODELAY__) |
|||
|
|||
#define OR1K_DELAYED(a, b) a; b |
|||
#define OR1K_DELAYED_NOP(a) a |
|||
|
|||
/* Go ahead and emit the .nodelay directive when in no-delay mode, so
|
|||
that the flags are appropriately set in the binary. */ |
|||
.nodelay |
|||
|
|||
#elif defined(__OR1K_DELAY__) |
|||
|
|||
#define OR1K_DELAYED(a, b) b; a |
|||
#define OR1K_DELAYED_NOP(a) a; l.nop |
|||
|
|||
#elif defined(__OR1K_DELAY_COMPAT__) |
|||
|
|||
#define OR1K_DELAYED(a, b) a; b; l.nop |
|||
#define OR1K_DELAYED_NOP(a) a; l.nop |
|||
|
|||
#else |
|||
|
|||
#error One of __OR1K_NODELAY__, __OR1K_DELAY__, or __OR1K_DELAY_COMPAT__ must be defined |
|||
|
|||
#endif |
|||
|
|||
#define LOAD_SYMBOL_2_GPR(gpr,symbol) \ |
|||
.global symbol ; \ |
|||
l.movhi gpr, hi(symbol) ; \ |
|||
l.ori gpr, gpr, lo(symbol) |
|||
#endif |
|||
Loading…
Reference in new issue