diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/aarch64/Makefile | 3 | ||||
| -rw-r--r-- | sysdeps/aarch64/__mtag_address_get_tag.S | 32 | ||||
| -rw-r--r-- | sysdeps/aarch64/libc-mtag.h | 14 |
3 files changed, 10 insertions, 39 deletions
diff --git a/sysdeps/aarch64/Makefile b/sysdeps/aarch64/Makefile index 259070c..5d594de 100644 --- a/sysdeps/aarch64/Makefile +++ b/sysdeps/aarch64/Makefile @@ -40,8 +40,7 @@ endif ifeq ($(subdir),misc) sysdep_headers += sys/ifunc.h -sysdep_routines += __mtag_address_get_tag \ - __mtag_tag_zero_region \ +sysdep_routines += __mtag_tag_zero_region \ __mtag_new_tag \ __mtag_tag_region diff --git a/sysdeps/aarch64/__mtag_address_get_tag.S b/sysdeps/aarch64/__mtag_address_get_tag.S deleted file mode 100644 index eab6c49..0000000 --- a/sysdeps/aarch64/__mtag_address_get_tag.S +++ /dev/null @@ -1,32 +0,0 @@ -/* Copyright (C) 2020-2021 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 */ diff --git a/sysdeps/aarch64/libc-mtag.h b/sysdeps/aarch64/libc-mtag.h index f58402c..da1b6be 100644 --- a/sysdeps/aarch64/libc-mtag.h +++ b/sysdeps/aarch64/libc-mtag.h @@ -35,17 +35,21 @@ #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) */ + that are multiples of __MTAG_GRANULE_SIZE. Size cannot be zero. */ void *__libc_mtag_tag_region (void *, size_t); /* Optimized equivalent to __libc_mtag_tag_region followed by memset to 0. */ void *__libc_mtag_tag_zero_region (void *, 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 *); + location. */ +static __always_inline void * +__libc_mtag_address_get_tag (void *p) +{ + register void *x0 asm ("x0") = p; + asm (".inst 0xd9600000 /* ldg x0, [x0] */" : "+r" (x0)); + return x0; +} /* Assign a new (random) tag to a pointer P (does not adjust the tag on the memory addressed). |