mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-12 22:30:12 +00:00
aarch64: Add aarch64-specific files for memory tagging support
This final patch provides the architecture-specific implementation of the memory-tagging support hooks for aarch64.
This commit is contained in:
Richard Earnshaw
parent
d3b950c14e
commit
9437fbd8d1
@ -40,4 +40,9 @@ endif
|
||||
|
||||
ifeq ($(subdir),misc)
|
||||
sysdep_headers += sys/ifunc.h
|
||||
sysdep_routines += __mtag_address_get_tag \
|
||||
__mtag_memset_tag \
|
||||
__mtag_new_tag \
|
||||
__mtag_tag_region
|
||||
|
||||
endif
|
||||
|
||||
32
sysdeps/aarch64/__mtag_address_get_tag.S
Normal file
32
sysdeps/aarch64/__mtag_address_get_tag.S
Normal file
@ -0,0 +1,32 @@
|
||||
/* Copyright (C) 2020 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#ifdef USE_MTAG
|
||||
#define ptr x0
|
||||
|
||||
.arch armv8.5-a
|
||||
.arch_extension memtag
|
||||
|
||||
ENTRY (__libc_mtag_address_get_tag)
|
||||
|
||||
ldg ptr, [ptr]
|
||||
ret
|
||||
END (__libc_mtag_address_get_tag)
|
||||
#endif /* USE_MTAG */
|
||||
53
sysdeps/aarch64/__mtag_memset_tag.S
Normal file
53
sysdeps/aarch64/__mtag_memset_tag.S
Normal file
@ -0,0 +1,53 @@
|
||||
/* Copyright (C) 2020 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#ifdef USE_MTAG
|
||||
|
||||
/* Use the same register names and assignments as memset. */
|
||||
#include "memset-reg.h"
|
||||
|
||||
.arch armv8.5-a
|
||||
.arch_extension memtag
|
||||
|
||||
/* NB, only supported on variants with 64-bit pointers. */
|
||||
|
||||
/* FIXME: This is a minimal implementation. We could do much better than
|
||||
this for large values of COUNT. */
|
||||
|
||||
ENTRY(__libc_mtag_memset_with_tag)
|
||||
|
||||
and valw, valw, 255
|
||||
orr valw, valw, valw, lsl 8
|
||||
orr valw, valw, valw, lsl 16
|
||||
orr val, val, val, lsl 32
|
||||
mov dst, dstin
|
||||
|
||||
L(loop):
|
||||
stgp val, val, [dst], #16
|
||||
subs count, count, 16
|
||||
bne L(loop)
|
||||
#if 0
|
||||
/* This is not currently needed, since for now we are only called
|
||||
to tag memory that is taggable. */
|
||||
ldg dstin, [dstin] // Recover the tag created (might be untagged).
|
||||
#endif
|
||||
ret
|
||||
END (__libc_mtag_memset_with_tag)
|
||||
#endif /* USE_MTAG */
|
||||
37
sysdeps/aarch64/__mtag_new_tag.S
Normal file
37
sysdeps/aarch64/__mtag_new_tag.S
Normal file
@ -0,0 +1,37 @@
|
||||
/* Copyright (C) 2020 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#ifdef USE_MTAG
|
||||
|
||||
.arch armv8.5-a
|
||||
.arch_extension memtag
|
||||
|
||||
/* NB, only supported on variants with 64-bit pointers. */
|
||||
|
||||
#define ptr x0
|
||||
#define xset x1
|
||||
|
||||
ENTRY(__libc_mtag_new_tag)
|
||||
// Guarantee that the new tag is not the same as now.
|
||||
gmi xset, ptr, xzr
|
||||
irg ptr, ptr, xset
|
||||
ret
|
||||
END (__libc_mtag_new_tag)
|
||||
#endif /* USE_MTAG */
|
||||
51
sysdeps/aarch64/__mtag_tag_region.S
Normal file
51
sysdeps/aarch64/__mtag_tag_region.S
Normal file
@ -0,0 +1,51 @@
|
||||
/* Copyright (C) 2020 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
#ifdef USE_MTAG
|
||||
|
||||
/* Use the same register names and assignments as memset. */
|
||||
|
||||
.arch armv8.5-a
|
||||
.arch_extension memtag
|
||||
|
||||
/* NB, only supported on variants with 64-bit pointers. */
|
||||
|
||||
/* FIXME: This is a minimal implementation. We could do better than
|
||||
this for larger values of COUNT. */
|
||||
|
||||
#define dstin x0
|
||||
#define count x1
|
||||
#define dst x2
|
||||
|
||||
ENTRY_ALIGN(__libc_mtag_tag_region, 6)
|
||||
|
||||
mov dst, dstin
|
||||
L(loop):
|
||||
stg dst, [dst], #16
|
||||
subs count, count, 16
|
||||
bne L(loop)
|
||||
#if 0
|
||||
/* This is not currently needed, since for now we are only called
|
||||
to tag memory that is taggable. */
|
||||
ldg dstin, [dstin] // Recover the tag created (might be untagged).
|
||||
#endif
|
||||
ret
|
||||
END (__libc_mtag_tag_region)
|
||||
#endif /* USE_MTAG */
|
||||
57
sysdeps/aarch64/libc-mtag.h
Normal file
57
sysdeps/aarch64/libc-mtag.h
Normal file
@ -0,0 +1,57 @@
|
||||
/* libc-internal interface for tagged (colored) memory support.
|
||||
Copyright (C) 2020 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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#ifndef _AARCH64_LIBC_MTAG_H
|
||||
#define _AARCH64_LIBC_MTAG_H 1
|
||||
|
||||
#ifndef USE_MTAG
|
||||
/* Generic bindings for systems that do not support memory tagging. */
|
||||
#include_next "libc-mtag.h"
|
||||
#else
|
||||
|
||||
/* Used to ensure additional alignment when objects need to have distinct
|
||||
tags. */
|
||||
#define __MTAG_GRANULE_SIZE 16
|
||||
|
||||
/* Non-zero if memory obtained via morecore (sbrk) is not tagged. */
|
||||
#define __MTAG_SBRK_UNTAGGED 1
|
||||
|
||||
/* Extra flags to pass to mmap to get tagged pages. */
|
||||
#define __MTAG_MMAP_FLAGS PROT_MTE
|
||||
|
||||
/* Set the tags for a region of memory, which must have size and alignment
|
||||
that are multiples of __MTAG_GRANULE_SIZE. Size cannot be zero.
|
||||
void *__libc_mtag_tag_region (const void *, size_t) */
|
||||
void *__libc_mtag_tag_region (void *, size_t);
|
||||
|
||||
/* Optimized equivalent to __libc_mtag_tag_region followed by memset. */
|
||||
void *__libc_mtag_memset_with_tag(void *, int, size_t);
|
||||
|
||||
/* Convert address P to a pointer that is tagged correctly for that
|
||||
location.
|
||||
void *__libc_mtag_address_get_tag (void*) */
|
||||
void *__libc_mtag_address_get_tag(void *);
|
||||
|
||||
/* Assign a new (random) tag to a pointer P (does not adjust the tag on
|
||||
the memory addressed).
|
||||
void *__libc_mtag_new_tag (void*) */
|
||||
void *__libc_mtag_new_tag(void *);
|
||||
|
||||
#endif /* USE_MTAG */
|
||||
|
||||
#endif /* _AARCH64_LIBC_MTAG_H */
|
||||
Loading…
Reference in New Issue
Block a user