* [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
@ 2021-09-24 16:53 H.J. Lu
2021-09-24 16:53 ` [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address H.J. Lu
` (2 more replies)
0 siblings, 3 replies; 11+ messages in thread
From: H.J. Lu @ 2021-09-24 16:53 UTC (permalink / raw)
To: libc-alpha
Cc: Florian Weimer, Joseph Myers, Kirill A . Shutemov, Szabolcs Nagy,
Adhemerval Zanella, Sunil K Pandey
Changes in v7:
1. Move set_translated_address_mask to libc_nonshared.a.
Changes in v6:
1. Update and simplify the API by only exporting:
/* Set the mask for address bits used in address translation. Return 0
on success. Return -1 on error. */
extern int set_translated_address_mask (uintptr_t __mask);
/* Non-zero if constant address BITS is a valid tagged address bits. */
#define TRANSLATED_ADDRESS_VALID_BITS(BITS)
/* A mask for constant address BITS used in address translation. */
#define TRANSLATED_ADDRESS_MASK(BITS)
2. Properly use _Static_assert for C and static_assert for C++.
Changes in v5:
Add restrictions:
1. All bits between 0 and N - 1, where N is the number of tagged address
bits, are used in address translation.
2. All pointers participating in a pointer arithmetic operation should have
the same tag if they point to the same memory object so that pointer
equality operation can be performed on tagged pointers.
Changes in v4:
1. Document that the zero return value from get_tagged_address_bits
indicates that tag bits are not the highest bits in address.
2. Document that the zero value of TAGGED_ADDRESS_MASK indicates the
invalid address mask.
3. Add <bits/tagged-address-mask.h> to provide TAGGED_ADDRESS_MASK.
4. Add C++ support to TAGGED_ADDRESS_MASK.
Changes in v3:
1. set_tagged_address_mask can be only called once before main.
2. Add more tests.
---
By default, the number of the address bits used in address translation
is the number of address bits. But it can be changed by ARM Top-byte
Ignore (TBI) or Intel Linear Address Masking (LAM).
<sys/tagged-address.h> provides an API for tagged address manipulation.
H.J. Lu (1):
<sys/tagged-address.h>: An API for tagged address
NEWS | 2 +
bits/tagged-address-mask.h | 47 +++++++++++++++++++++
bits/tagged-address-valid-bits.h | 28 +++++++++++++
csu/libc-start.c | 3 ++
elf/dl-support.c | 5 +++
include/sys/tagged-address.h | 19 +++++++++
manual/Makefile | 3 +-
manual/ctype.texi | 2 +-
manual/memory.texi | 2 +-
manual/tagged-address.texi | 48 +++++++++++++++++++++
misc/Makefile | 48 ++++++++++++++++++---
misc/set-translated-address-mask.c | 49 ++++++++++++++++++++++
misc/sys/tagged-address.h | 33 +++++++++++++++
misc/tagged-address.c | 50 ++++++++++++++++++++++
misc/tst-tagged-address-1-static.c | 1 +
misc/tst-tagged-address-1.c | 55 +++++++++++++++++++++++++
misc/tst-tagged-address-2-static.c | 1 +
misc/tst-tagged-address-2.c | 45 ++++++++++++++++++++
misc/tst-tagged-address-3-static.c | 1 +
misc/tst-tagged-address-3.c | 48 +++++++++++++++++++++
misc/tst-tagged-address-4-static.c | 1 +
misc/tst-tagged-address-4.c | 36 ++++++++++++++++
misc/tst-tagged-address-5.c | 25 +++++++++++
misc/tst-tagged-address-6.c | 34 +++++++++++++++
misc/tst-tagged-address-7.c | 41 ++++++++++++++++++
misc/tst-tagged-address-mod-5.c | 47 +++++++++++++++++++++
misc/tst-tagged-address-mod-6.c | 34 +++++++++++++++
misc/tst-tagged-address-mod-7.c | 35 ++++++++++++++++
sysdeps/generic/inline-tagged-address.h | 43 +++++++++++++++++++
sysdeps/generic/ldsodefs.h | 4 ++
30 files changed, 782 insertions(+), 8 deletions(-)
create mode 100644 bits/tagged-address-mask.h
create mode 100644 bits/tagged-address-valid-bits.h
create mode 100644 include/sys/tagged-address.h
create mode 100644 manual/tagged-address.texi
create mode 100644 misc/set-translated-address-mask.c
create mode 100644 misc/sys/tagged-address.h
create mode 100644 misc/tagged-address.c
create mode 100644 misc/tst-tagged-address-1-static.c
create mode 100644 misc/tst-tagged-address-1.c
create mode 100644 misc/tst-tagged-address-2-static.c
create mode 100644 misc/tst-tagged-address-2.c
create mode 100644 misc/tst-tagged-address-3-static.c
create mode 100644 misc/tst-tagged-address-3.c
create mode 100644 misc/tst-tagged-address-4-static.c
create mode 100644 misc/tst-tagged-address-4.c
create mode 100644 misc/tst-tagged-address-5.c
create mode 100644 misc/tst-tagged-address-6.c
create mode 100644 misc/tst-tagged-address-7.c
create mode 100644 misc/tst-tagged-address-mod-5.c
create mode 100644 misc/tst-tagged-address-mod-6.c
create mode 100644 misc/tst-tagged-address-mod-7.c
create mode 100644 sysdeps/generic/inline-tagged-address.h
--
2.31.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address
2021-09-24 16:53 [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> H.J. Lu
@ 2021-09-24 16:53 ` H.J. Lu
2021-10-04 13:58 ` H.J. Lu
2021-09-24 18:08 ` [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> Joseph Myers
2021-11-15 13:34 ` Florian Weimer
2 siblings, 1 reply; 11+ messages in thread
From: H.J. Lu @ 2021-09-24 16:53 UTC (permalink / raw)
To: libc-alpha
Cc: Florian Weimer, Joseph Myers, Kirill A . Shutemov, Szabolcs Nagy,
Adhemerval Zanella, Sunil K Pandey
By default, the number of the address bits used in address translation
is the number of address bits. But it can be changed by ARM Top-byte
Ignore (TBI) or Intel Linear Address Masking (LAM).
<sys/tagged-address.h> provides an API for tagged address manipulation
with restrictions:
1. All bits between 0 and N - 1, where N is the number of tagged address
bits, are used in address translation.
2. All pointers participating in a pointer arithmetic operation should have
the same tag if they point to the same memory object so that pointer
equality operation can be performed on tagged pointers.
/* Set the mask for address bits used in address translation. Return 0
on success. Return -1 on error. */
extern int set_translated_address_mask (uintptr_t __mask);
/* Non-zero if constant address BITS is a valid tagged address bits. */
#define TRANSLATED_ADDRESS_VALID_BITS(BITS)
/* A mask for constant address BITS used in address translation. */
#define TRANSLATED_ADDRESS_MASK(BITS)
1. set_translated_address_mask should be called as early as possible.
2. set_translated_address_mask shouldn't be allowed after main or thread
creation.
3. After set_translated_address_mask is called, don't allow it to be
called again to change the tagged address mask. Otherwise, the previously
tagged addresses may not work anymore.
---
NEWS | 2 +
bits/tagged-address-mask.h | 47 +++++++++++++++++++++
bits/tagged-address-valid-bits.h | 28 +++++++++++++
csu/libc-start.c | 3 ++
elf/dl-support.c | 5 +++
include/sys/tagged-address.h | 19 +++++++++
manual/Makefile | 3 +-
manual/ctype.texi | 2 +-
manual/memory.texi | 2 +-
manual/tagged-address.texi | 48 +++++++++++++++++++++
misc/Makefile | 48 ++++++++++++++++++---
misc/set-translated-address-mask.c | 49 ++++++++++++++++++++++
misc/sys/tagged-address.h | 33 +++++++++++++++
misc/tagged-address.c | 50 ++++++++++++++++++++++
misc/tst-tagged-address-1-static.c | 1 +
misc/tst-tagged-address-1.c | 55 +++++++++++++++++++++++++
misc/tst-tagged-address-2-static.c | 1 +
misc/tst-tagged-address-2.c | 45 ++++++++++++++++++++
misc/tst-tagged-address-3-static.c | 1 +
misc/tst-tagged-address-3.c | 48 +++++++++++++++++++++
misc/tst-tagged-address-4-static.c | 1 +
misc/tst-tagged-address-4.c | 36 ++++++++++++++++
misc/tst-tagged-address-5.c | 25 +++++++++++
misc/tst-tagged-address-6.c | 34 +++++++++++++++
misc/tst-tagged-address-7.c | 41 ++++++++++++++++++
misc/tst-tagged-address-mod-5.c | 47 +++++++++++++++++++++
misc/tst-tagged-address-mod-6.c | 34 +++++++++++++++
misc/tst-tagged-address-mod-7.c | 35 ++++++++++++++++
sysdeps/generic/inline-tagged-address.h | 43 +++++++++++++++++++
sysdeps/generic/ldsodefs.h | 4 ++
30 files changed, 782 insertions(+), 8 deletions(-)
create mode 100644 bits/tagged-address-mask.h
create mode 100644 bits/tagged-address-valid-bits.h
create mode 100644 include/sys/tagged-address.h
create mode 100644 manual/tagged-address.texi
create mode 100644 misc/set-translated-address-mask.c
create mode 100644 misc/sys/tagged-address.h
create mode 100644 misc/tagged-address.c
create mode 100644 misc/tst-tagged-address-1-static.c
create mode 100644 misc/tst-tagged-address-1.c
create mode 100644 misc/tst-tagged-address-2-static.c
create mode 100644 misc/tst-tagged-address-2.c
create mode 100644 misc/tst-tagged-address-3-static.c
create mode 100644 misc/tst-tagged-address-3.c
create mode 100644 misc/tst-tagged-address-4-static.c
create mode 100644 misc/tst-tagged-address-4.c
create mode 100644 misc/tst-tagged-address-5.c
create mode 100644 misc/tst-tagged-address-6.c
create mode 100644 misc/tst-tagged-address-7.c
create mode 100644 misc/tst-tagged-address-mod-5.c
create mode 100644 misc/tst-tagged-address-mod-6.c
create mode 100644 misc/tst-tagged-address-mod-7.c
create mode 100644 sysdeps/generic/inline-tagged-address.h
diff --git a/NEWS b/NEWS
index 889578bf39..b46de848db 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,8 @@ Version 2.35
Major new features:
+* Add <sys/tagged-address.h> to provide an API for tagged address.
+
* Bump r_version in the debugger interface to 2 and add a new field,
r_next, support multiple namespaces.
diff --git a/bits/tagged-address-mask.h b/bits/tagged-address-mask.h
new file mode 100644
index 0000000000..8762921083
--- /dev/null
+++ b/bits/tagged-address-mask.h
@@ -0,0 +1,47 @@
+/* Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_TAGGED_ADDRESS_MASK_H
+#define _BITS_TAGGED_ADDRESS_MASK_H 1
+
+#ifndef _SYS_TAGGED_ADDRESS_H
+# error "Never include this file directly. Use <sys/tagged-address.h> instead"
+#endif
+
+#include <bits/tagged-address-valid-bits.h>
+
+#ifdef __cplusplus
+# if __cplusplus >= 201103L
+# define TRANSLATED_ADDRESS_ASSERT static_assert
+# else
+# define TRANSLATED_ADDRESS_ASSERT(expr, msg)
+# endif
+#else
+# define TRANSLATED_ADDRESS_ASSERT _Static_assert
+#endif
+
+/* A mask for constant address BITS used in address translation. */
+#define TRANSLATED_ADDRESS_MASK(BITS) \
+ (__extension__ \
+ ({ \
+ TRANSLATED_ADDRESS_ASSERT \
+ (TRANSLATED_ADDRESS_VALID_BITS (BITS), \
+ "Translated address bits must be valid"); \
+ (((uintptr_t) 1) << (BITS)) - 1; \
+ }))
+
+#endif /* <bits/tagged-address-mask.h> */
diff --git a/bits/tagged-address-valid-bits.h b/bits/tagged-address-valid-bits.h
new file mode 100644
index 0000000000..995bc2899b
--- /dev/null
+++ b/bits/tagged-address-valid-bits.h
@@ -0,0 +1,28 @@
+/* Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _BITS_TAGGED_ADDRESS_VALID_BITS_H
+#define _BITS_TAGGED_ADDRESS_VALID_BITS_H 1
+
+#ifndef _SYS_TAGGED_ADDRESS_H
+# error "Never include this file directly. Use <sys/tagged-address.h> instead"
+#endif
+
+/* Non-zero if constant address BITS is a valid translated address bits. */
+#define TRANSLATED_ADDRESS_VALID_BITS(BITS) 0
+
+#endif /* <bits/tagged-address-valid-bits.h> */
diff --git a/csu/libc-start.c b/csu/libc-start.c
index 0350b006fd..6f8ffa08f0 100644
--- a/csu/libc-start.c
+++ b/csu/libc-start.c
@@ -402,6 +402,9 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
GLRO(dl_debug_printf) ("\ntransferring control: %s\n\n", argv[0]);
#endif
+ /* set_translated_address_mask can only be called before main. */
+ GL(dl_translated_address_mask_locked) = 1;
+
#ifndef SHARED
_dl_debug_initialize (0, LM_ID_BASE);
#endif
diff --git a/elf/dl-support.c b/elf/dl-support.c
index 02e2ed72f5..784fb6a58d 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -212,6 +212,11 @@ struct link_map *_dl_sysinfo_map;
# include "get-dynamic-info.h"
#endif
+
+/* If nonzero, the mask for address bits used in address translation
+ is locked. */
+int _dl_translated_address_mask_locked;
+
#include "setup-vdso.h"
/* Define the vDSO function pointers. */
#include <dl-vdso-setup.c>
diff --git a/include/sys/tagged-address.h b/include/sys/tagged-address.h
new file mode 100644
index 0000000000..4f94dab511
--- /dev/null
+++ b/include/sys/tagged-address.h
@@ -0,0 +1,19 @@
+#include <misc/sys/tagged-address.h>
+
+#ifdef _ISOMAC
+/* Get the current address bits used in address translation. */
+extern unsigned int __libc_get_translated_address_bits (void);
+
+/* Get the current mask for address bits used in address translation. */
+extern uintptr_t __libc_get_translated_address_mask (void);
+
+/* Return the tagged address of __ADDR with the tag value __TAG. */
+extern void *__libc_tag_address (const void *__addr,
+ unsigned int __tag);
+
+/* Return the untagged address of __ADDR. */
+extern void *__libc_untag_address (const void *__addr);
+
+#else
+# include <inline-tagged-address.h>
+#endif
diff --git a/manual/Makefile b/manual/Makefile
index e83444341e..08df2daa6b 100644
--- a/manual/Makefile
+++ b/manual/Makefile
@@ -34,7 +34,8 @@ info: $(objpfx)libc.info
endif
chapters = $(addsuffix .texi, \
- intro errno memory ctype string charset locale \
+ intro errno memory tagged-address ctype string \
+ charset locale \
message search pattern io stdio llio filesys \
pipe socket terminal syslog math arith time \
resource setjmp signal startup process ipc job \
diff --git a/manual/ctype.texi b/manual/ctype.texi
index d0618c5c38..28af73ff0e 100644
--- a/manual/ctype.texi
+++ b/manual/ctype.texi
@@ -1,4 +1,4 @@
-@node Character Handling, String and Array Utilities, Memory, Top
+@node Character Handling, String and Array Utilities, Tagged Address, Top
@c %MENU% Character testing and conversion functions
@chapter Character Handling
diff --git a/manual/memory.texi b/manual/memory.texi
index 0b2b9c8795..2e283e41f9 100644
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -1,4 +1,4 @@
-@node Memory, Character Handling, Error Reporting, Top
+@node Memory, Tagged Address, Error Reporting, Top
@chapter Virtual Memory Allocation And Paging
@c %MENU% Allocating virtual memory and controlling paging
@cindex memory allocation
diff --git a/manual/tagged-address.texi b/manual/tagged-address.texi
new file mode 100644
index 0000000000..d10e67b7e2
--- /dev/null
+++ b/manual/tagged-address.texi
@@ -0,0 +1,48 @@
+@node Tagged Address, Character Handling, Memory, Top
+@c %MENU% Tagged address functions and macros
+@chapter Tagged Address
+
+By default, the number of the address bits used in address translation
+is the number of address bits. But it can be changed by ARM Top-byte
+Ignore (TBI) or Intel Linear Address Masking (LAM).
+
+@Theglibc{} provides one function and two macros in the header file
+@file{sys/tagged-address.h} to manipulate translated address bits,
+which is the number of the address bits used in address translation,
+with restrictions:
+
+@itemize @bullet
+@item
+All bits between 0 and N - 1, where N is the number of translated address
+bits, are used in address translation.
+
+@item
+All pointers participating in a pointer arithmetic operation should have
+the same tag if they point to the same memory object so that pointer
+equality operation can be performed on tagged pointers.
+@end itemize
+
+@pindex sys/tagged-address.h
+
+@deftypefun int set_translated_address_mask (uintptr_t @var{mask})
+@standards{GNU, sys/tagged-address.h}
+@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
+Set the mask for address bits used in address translation to @var{mask}.
+Only bits set in @var{mask} will be used in address translation. The
+return value is @code{0} on success and @code{-1} on failure. This
+function can be called only once before @code{main} and thread creation.
+The possible @code{errno} error conditions are @code{ENODEV}, @code{EPERM},
+@code{EINVAL}, and @code{ENOSYS}.
+@end deftypefun
+
+@deftypefn Macro int TRANSLATED_ADDRESS_VALID_BITS (@var{bits})
+This macro returns a nonzero value (true) if @var{bits} is a valid
+constant number of the lower address bits which can be used in address
+translation.
+@end deftypefn
+
+@deftypefn Macro {const uintptr_t} TRANSLATED_ADDRESS_MASK (@var{bits})
+This macro returns a nonzero value which can be passed to
+@code{set_translated_address_mask} to specify the lower address
+@var{bits} for address translation.
+@end deftypefn
diff --git a/misc/Makefile b/misc/Makefile
index 1083ba3bfc..82555c7dc1 100644
--- a/misc/Makefile
+++ b/misc/Makefile
@@ -38,7 +38,10 @@ headers := sys/uio.h bits/uio-ext.h bits/uio_lim.h \
bits/select2.h bits/hwcap.h sys/auxv.h \
sys/sysmacros.h bits/sysmacros.h bits/types/struct_iovec.h \
bits/err-ldbl.h bits/error-ldbl.h \
- sys/single_threaded.h
+ sys/single_threaded.h \
+ sys/tagged-address.h \
+ bits/tagged-address-mask.h \
+ bits/tagged-address-valid-bits.h
routines := brk sbrk sstk ioctl \
readv writev preadv preadv64 pwritev pwritev64 \
@@ -73,7 +76,12 @@ routines := brk sbrk sstk ioctl \
fgetxattr flistxattr fremovexattr fsetxattr getxattr \
listxattr lgetxattr llistxattr lremovexattr lsetxattr \
removexattr setxattr getauxval ifunc-impl-list makedev \
- allocate_once fd_to_filename single_threaded unwind-link
+ allocate_once fd_to_filename single_threaded unwind-link \
+ tagged-address set-translated-address-mask
+
+# Put the initial <sys/tagged-address.h> in libc_nonshared.a for easy
+# backport.
+static-only-routines += tagged-address set-translated-address-mask
generated += tst-error1.mtrace tst-error1-mem.out \
tst-allocate_once.mtrace tst-allocate_once-mem.out
@@ -89,7 +97,11 @@ tests := tst-dirname tst-tsearch tst-fdset tst-mntent tst-hsearch \
tst-preadvwritev2 tst-preadvwritev64v2 tst-warn-wide \
tst-ldbl-warn tst-ldbl-error tst-dbl-efgcvt tst-ldbl-efgcvt \
tst-mntent-autofs tst-syscalls tst-mntent-escape tst-select \
- tst-ioctl
+ tst-ioctl \
+ tst-tagged-address-1 tst-tagged-address-1-static \
+ tst-tagged-address-2 tst-tagged-address-2-static \
+ tst-tagged-address-3 tst-tagged-address-3-static \
+ tst-tagged-address-4 tst-tagged-address-4-static
tests-time64 := \
tst-select-time64 \
@@ -99,11 +111,24 @@ tests-time64 := \
# Tests which need libdl.
ifeq (yes,$(build-shared))
-tests += tst-gethostid
+tests += tst-gethostid \
+ tst-tagged-address-5 \
+ tst-tagged-address-6 \
+ tst-tagged-address-7
+modules-names-tst-tagged-address = \
+ tst-tagged-address-mod-5 \
+ tst-tagged-address-mod-6 \
+ tst-tagged-address-mod-7
+modules-names += $(modules-names-tst-tagged-address)
+modules-names-tests += $(modules-names-tst-tagged-address)
endif
tests-internal := tst-atomic tst-atomic-long tst-allocate_once
-tests-static := tst-empty
+tests-static := tst-empty \
+ tst-tagged-address-1-static \
+ tst-tagged-address-2-static \
+ tst-tagged-address-3-static \
+ tst-tagged-address-4-static
# Test for the internal, non-exported __fd_to_filename function.
tests-internal += tst-fd_to_filename
@@ -149,6 +174,10 @@ CFLAGS-sbrk.op = $(no-stack-protector)
CFLAGS-brk.o = $(no-stack-protector)
CFLAGS-brk.op = $(no-stack-protector)
+# Compile set-translated-address-mask.oS in libc_nonshared.a with -DSHARED
+# to use GL(dl_XXX) in ld.so, instead of _dl_XXX in libc.a.
+CPPFLAGS-set-translated-address-mask.oS += -DSHARED
+
include ../Rules
$(objpfx)libg.a: $(dep-dummy-lib); $(make-dummy-lib)
@@ -172,3 +201,12 @@ $(objpfx)tst-select: $(librt)
$(objpfx)tst-select-time64: $(librt)
$(objpfx)tst-pselect: $(librt)
$(objpfx)tst-pselect-time64: $(librt)
+
+$(objpfx)tst-tagged-address-2: $(shared-thread-library)
+$(objpfx)tst-tagged-address-2-static: $(static-thread-library)
+$(objpfx)tst-tagged-address-5: $(objpfx)tst-tagged-address-mod-5.so
+$(objpfx)tst-tagged-address-mod-5.so: $(libsupport)
+$(objpfx)tst-tagged-address-6: $(objpfx)tst-tagged-address-mod-6.so
+$(objpfx)tst-tagged-address-mod-6.so: $(libsupport)
+$(objpfx)tst-tagged-address-7.out: $(objpfx)tst-tagged-address-mod-7.so
+$(objpfx)tst-tagged-address-mod-7.so: $(libsupport)
diff --git a/misc/set-translated-address-mask.c b/misc/set-translated-address-mask.c
new file mode 100644
index 0000000000..e29797a22e
--- /dev/null
+++ b/misc/set-translated-address-mask.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <sys/tagged-address.h>
+#include <ldsodefs.h>
+
+#ifdef LIBC_NONSHARED
+/* Use the global errno in libc_nonshared.a. */
+# undef errno
+extern __thread int errno;
+# undef __set_errno
+# define __set_errno(n) errno = n
+#endif
+
+/* Set the mask for address bits used in address translation. Return 0
+ on success. Return -1 on error. */
+
+int
+set_translated_address_mask (uintptr_t mask)
+{
+ if (GL(dl_translated_address_mask_locked) != 0)
+ __set_errno (EPERM);
+ else
+ {
+ /* set_translated_address_mask can only be called once. */
+ GL(dl_translated_address_mask_locked) = 1;
+
+ /* Only NOP is allowed. */
+ if (mask == __get_translated_address_mask ())
+ return 0;
+
+ __set_errno (ENOSYS);
+ }
+ return -1;
+}
diff --git a/misc/sys/tagged-address.h b/misc/sys/tagged-address.h
new file mode 100644
index 0000000000..a0a91bad75
--- /dev/null
+++ b/misc/sys/tagged-address.h
@@ -0,0 +1,33 @@
+/* Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_TAGGED_ADDRESS_H
+#define _SYS_TAGGED_ADDRESS_H 1
+
+#include <features.h>
+#include <stdint.h>
+#include <bits/tagged-address-mask.h>
+
+__BEGIN_DECLS
+
+/* Set the mask for address bits used in address translation. Return 0
+ on success. Return -1 on error. */
+extern int set_translated_address_mask (uintptr_t __mask);
+
+__END_DECLS
+
+#endif /* <sys/tagged-address.h> */
diff --git a/misc/tagged-address.c b/misc/tagged-address.c
new file mode 100644
index 0000000000..7c405facff
--- /dev/null
+++ b/misc/tagged-address.c
@@ -0,0 +1,50 @@
+/* Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <sys/tagged-address.h>
+
+/* Get the current address bits used in address translation. */
+
+unsigned int
+__libc_get_translated_address_bits (void)
+{
+ return __get_translated_address_bits ();
+}
+
+/* Get the current mask for address bits used in address translation. */
+
+uintptr_t
+__libc_get_translated_address_mask (void)
+{
+ return __get_translated_address_mask ();
+}
+
+/* Return the tagged address of ADDR with the tag value TAG. */
+
+void *
+__libc_tag_address (const void *addr, unsigned int tag)
+{
+ return __tag_address (addr, tag);
+}
+
+/* Return the untagged address of ADDR. */
+
+void *
+__libc_untag_address (const void *addr)
+{
+ return __untag_address (addr);
+}
diff --git a/misc/tst-tagged-address-1-static.c b/misc/tst-tagged-address-1-static.c
new file mode 100644
index 0000000000..3ed71a66c2
--- /dev/null
+++ b/misc/tst-tagged-address-1-static.c
@@ -0,0 +1 @@
+#include <tst-tagged-address-1.c>
diff --git a/misc/tst-tagged-address-1.c b/misc/tst-tagged-address-1.c
new file mode 100644
index 0000000000..0751be9b24
--- /dev/null
+++ b/misc/tst-tagged-address-1.c
@@ -0,0 +1,55 @@
+/* Tests for set_translated_address_mask before main.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static void
+init_0 (void)
+{
+ if (set_translated_address_mask (__libc_get_translated_address_mask ())
+ != 0)
+ FAIL_EXIT1 ("set_translated_address_mask failed: %m");
+}
+
+static void
+init_1 (void)
+{
+ if (set_translated_address_mask (__libc_get_translated_address_mask ())
+ == 0)
+ FAIL_EXIT1 ("set_translated_address_mask should fail");
+
+ if (errno != EPERM)
+ FAIL_EXIT1 ("set_translated_address_mask: errno (%m) != EPERM");
+}
+
+static void (*init_array []) (void)
+ __attribute__ ((used, section (".init_array"), aligned (sizeof (void *)))) =
+{
+ &init_0,
+ &init_1
+};
+
+static int
+do_test (void)
+{
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-2-static.c b/misc/tst-tagged-address-2-static.c
new file mode 100644
index 0000000000..ac0d95e6c0
--- /dev/null
+++ b/misc/tst-tagged-address-2-static.c
@@ -0,0 +1 @@
+#include <tst-tagged-address-2.c>
diff --git a/misc/tst-tagged-address-2.c b/misc/tst-tagged-address-2.c
new file mode 100644
index 0000000000..00a97148f8
--- /dev/null
+++ b/misc/tst-tagged-address-2.c
@@ -0,0 +1,45 @@
+/* Test for set_translated_address_mask before main with pthread.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/tagged-address.h>
+#include <support/xthread.h>
+#include <support/check.h>
+
+static void *
+tf (void *arg)
+{
+ if (set_translated_address_mask (__libc_get_translated_address_mask ())
+ == 0)
+ FAIL_EXIT1 ("set_translated_address_mask should fail");
+
+ if (errno != EPERM)
+ FAIL_EXIT1 ("set_translated_address_mask: errno (%m) != EPERM");
+
+ return NULL;
+}
+
+static int
+do_test (void)
+{
+ pthread_t thr = xpthread_create (NULL, tf, NULL);
+ xpthread_join (thr);
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-3-static.c b/misc/tst-tagged-address-3-static.c
new file mode 100644
index 0000000000..1e3591e0d6
--- /dev/null
+++ b/misc/tst-tagged-address-3-static.c
@@ -0,0 +1 @@
+#include <tst-tagged-address-3.c>
diff --git a/misc/tst-tagged-address-3.c b/misc/tst-tagged-address-3.c
new file mode 100644
index 0000000000..04d2f8d3da
--- /dev/null
+++ b/misc/tst-tagged-address-3.c
@@ -0,0 +1,48 @@
+/* Tests for set_translated_address_mask to turn off tagged address.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static void
+init (void)
+{
+ uintptr_t mask = (uintptr_t) -1;
+ if (set_translated_address_mask (mask) != 0)
+ FAIL_EXIT1 ("set_translated_address_mask failed: %m");
+}
+
+static void (*init_array []) (void)
+ __attribute__ ((used, section (".init_array"), aligned (sizeof (void *)))) =
+{
+ &init
+};
+
+static int
+do_test (void)
+{
+ uintptr_t mask = (uintptr_t) -1;
+ uintptr_t curent_mask = __libc_get_translated_address_mask ();
+ if (curent_mask != mask)
+ FAIL_EXIT1 ("get_translated_address_mask failed: %p != %p",
+ (void *) curent_mask, (void *) mask);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-4-static.c b/misc/tst-tagged-address-4-static.c
new file mode 100644
index 0000000000..b0681f6f9b
--- /dev/null
+++ b/misc/tst-tagged-address-4-static.c
@@ -0,0 +1 @@
+#include <tst-tagged-address-4.c>
diff --git a/misc/tst-tagged-address-4.c b/misc/tst-tagged-address-4.c
new file mode 100644
index 0000000000..9131373ba1
--- /dev/null
+++ b/misc/tst-tagged-address-4.c
@@ -0,0 +1,36 @@
+/* Test for set_translated_address_mask after main.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ if (set_translated_address_mask (__libc_get_translated_address_mask ())
+ == 0)
+ FAIL_EXIT1 ("set_translated_address_mask should fail");
+
+ if (errno != EPERM)
+ FAIL_EXIT1 ("set_translated_address_mask: errno (%m) != EPERM");
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-5.c b/misc/tst-tagged-address-5.c
new file mode 100644
index 0000000000..f3c6ce5935
--- /dev/null
+++ b/misc/tst-tagged-address-5.c
@@ -0,0 +1,25 @@
+/* Tests for set_translated_address_mask in a shared library before main.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+static int
+do_test (void)
+{
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-6.c b/misc/tst-tagged-address-6.c
new file mode 100644
index 0000000000..60c6497af2
--- /dev/null
+++ b/misc/tst-tagged-address-6.c
@@ -0,0 +1,34 @@
+/* Tests for set_translated_address_mask to turn off tagged address.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ uintptr_t mask = (uintptr_t) -1;
+ uintptr_t curent_mask = __libc_get_translated_address_mask ();
+ if (curent_mask != mask)
+ FAIL_EXIT1 ("get_translated_address_mask failed: %p != %p",
+ (void *) curent_mask, (void *) mask);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-7.c b/misc/tst-tagged-address-7.c
new file mode 100644
index 0000000000..7d987e19e3
--- /dev/null
+++ b/misc/tst-tagged-address-7.c
@@ -0,0 +1,41 @@
+/* Test for set_translated_address_mask in a dlopened shared library
+ after main.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <stddef.h>
+#include <dlfcn.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ const char *modname = "$ORIGIN/tst-tagged-address-mod-7.so";
+ void *h = dlopen (modname, RTLD_LAZY);
+
+ if (h == NULL)
+ {
+ const char *err = dlerror ();
+ FAIL_EXIT1 ("cannot open '%s': %s\n", modname, err);
+ }
+
+ dlclose (h);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/misc/tst-tagged-address-mod-5.c b/misc/tst-tagged-address-mod-5.c
new file mode 100644
index 0000000000..88b8d6a261
--- /dev/null
+++ b/misc/tst-tagged-address-mod-5.c
@@ -0,0 +1,47 @@
+/* Tests for set_translated_address_mask in a shared library.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static void
+init_0 (void)
+{
+ if (set_translated_address_mask (__libc_get_translated_address_mask ())
+ != 0)
+ FAIL_EXIT1 ("set_translated_address_mask failed: %m");
+}
+
+static void
+init_1 (void)
+{
+ if (set_translated_address_mask (__libc_get_translated_address_mask ())
+ == 0)
+ FAIL_EXIT1 ("set_translated_address_mask should fail");
+
+ if (errno != EPERM)
+ FAIL_EXIT1 ("set_translated_address_mask: errno (%m) != EPERM");
+}
+
+static void (*init_array []) (void)
+ __attribute__ ((used, section (".init_array"), aligned (sizeof (void *)))) =
+{
+ &init_0,
+ &init_1
+};
diff --git a/misc/tst-tagged-address-mod-6.c b/misc/tst-tagged-address-mod-6.c
new file mode 100644
index 0000000000..4d9396425d
--- /dev/null
+++ b/misc/tst-tagged-address-mod-6.c
@@ -0,0 +1,34 @@
+/* Tests for set_translated_address_mask to turn off tagged address.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static void
+init (void)
+{
+ uintptr_t mask = (uintptr_t) -1;
+ if (set_translated_address_mask (mask) != 0)
+ FAIL_EXIT1 ("set_translated_address_mask failed: %m");
+}
+
+static void (*init_array []) (void)
+ __attribute__ ((used, section (".init_array"), aligned (sizeof (void *)))) =
+{
+ &init
+};
diff --git a/misc/tst-tagged-address-mod-7.c b/misc/tst-tagged-address-mod-7.c
new file mode 100644
index 0000000000..7d8f80a232
--- /dev/null
+++ b/misc/tst-tagged-address-mod-7.c
@@ -0,0 +1,35 @@
+/* Tests for set_translated_address_mask to turn off tagged address in
+ a shared library.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <sys/tagged-address.h>
+#include <support/check.h>
+
+static void
+init (void)
+{
+ uintptr_t mask = (uintptr_t) -1;
+ if (set_translated_address_mask (mask) == 0)
+ FAIL_EXIT1 ("set_translated_address_mask should have failed");
+}
+
+static void (*init_array []) (void)
+ __attribute__ ((used, section (".init_array"), aligned (sizeof (void *)))) =
+{
+ &init
+};
diff --git a/sysdeps/generic/inline-tagged-address.h b/sysdeps/generic/inline-tagged-address.h
new file mode 100644
index 0000000000..3b733e437b
--- /dev/null
+++ b/sysdeps/generic/inline-tagged-address.h
@@ -0,0 +1,43 @@
+/* Inline tagged address functions. Generic version.
+ Copyright (C) 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+
+static inline unsigned int
+__get_translated_address_bits (void)
+{
+ return sizeof (uintptr_t) * 8;
+}
+
+static inline uintptr_t
+__get_translated_address_mask (void)
+{
+ return (uintptr_t) -1;
+}
+
+static inline void *
+__tag_address (const void *addr, unsigned int tag)
+{
+ return (void *) addr;
+}
+
+static inline void *
+__untag_address (const void *addr)
+{
+ return (void *) addr;
+}
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index d49529da0d..e13e526bd8 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -492,6 +492,10 @@ struct rtld_global
EXTERN struct __pthread **_dl_pthread_threads;
__libc_rwlock_define (EXTERN, _dl_pthread_threads_lock)
#endif
+
+ /* If nonzero, the mask for address bits used in address translation
+ is locked. */
+ EXTERN int _dl_translated_address_mask_locked;
#ifdef SHARED
};
# define __rtld_global_attribute__
--
2.31.1
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 16:53 [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> H.J. Lu
2021-09-24 16:53 ` [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address H.J. Lu
@ 2021-09-24 18:08 ` Joseph Myers
2021-09-24 18:39 ` H.J. Lu
2021-11-15 13:34 ` Florian Weimer
2 siblings, 1 reply; 11+ messages in thread
From: Joseph Myers @ 2021-09-24 18:08 UTC (permalink / raw)
To: H.J. Lu; +Cc: libc-alpha, Florian Weimer, Szabolcs Nagy, Kirill A . Shutemov
On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:
> Changes in v7:
>
> 1. Move set_translated_address_mask to libc_nonshared.a.
Code in *_nonshared.a or crt*.o should include the LGPL exception wording:
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The GNU Lesser General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
Note that people who make modified versions of this file are not
obligated to grant this special exception for their modified
versions; it is their choice whether to do so. The GNU Lesser
General Public License gives permission to release a modified
version without this exception; this exception also makes it
possible to release a modified version which carries forward this
exception.
(The point being that people linking with glibc should be able to meet
their LGPL obligations by linking dynamically, without also needing to
provide a way to relink with modified versions of the *_nonshared.a code.)
Presumably when we get DCO contributions to such files we also need to
adjust the exception wording accordingly regarding who gives the above
permission.
--
Joseph S. Myers
joseph@codesourcery.com
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 18:08 ` [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> Joseph Myers
@ 2021-09-24 18:39 ` H.J. Lu
2021-09-24 18:53 ` Joseph Myers
0 siblings, 1 reply; 11+ messages in thread
From: H.J. Lu @ 2021-09-24 18:39 UTC (permalink / raw)
To: Joseph Myers
Cc: GNU C Library, Florian Weimer, Szabolcs Nagy, Kirill A . Shutemov
On Fri, Sep 24, 2021 at 11:08 AM Joseph Myers <joseph@codesourcery.com> wrote:
>
> On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:
>
> > Changes in v7:
> >
> > 1. Move set_translated_address_mask to libc_nonshared.a.
>
> Code in *_nonshared.a or crt*.o should include the LGPL exception wording:
>
> In addition to the permissions in the GNU Lesser General Public
> License, the Free Software Foundation gives you unlimited
> permission to link the compiled version of this file with other
> programs, and to distribute those programs without any restriction
> coming from the use of this file. (The GNU Lesser General Public
> License restrictions do apply in other respects; for example, they
> cover modification of the file, and distribution when not linked
> into another program.)
>
> Note that people who make modified versions of this file are not
> obligated to grant this special exception for their modified
> versions; it is their choice whether to do so. The GNU Lesser
> General Public License gives permission to release a modified
> version without this exception; this exception also makes it
> possible to release a modified version which carries forward this
> exception.
>
> (The point being that people linking with glibc should be able to meet
> their LGPL obligations by linking dynamically, without also needing to
> provide a way to relink with modified versions of the *_nonshared.a code.)
>
> Presumably when we get DCO contributions to such files we also need to
> adjust the exception wording accordingly regarding who gives the above
> permission.
>
> --
> Joseph S. Myers
> joseph@codesourcery.com
I added the following change to set-translated-address-mask.c:
@@ -6,6 +6,15 @@
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
+ In addition to the permissions in the GNU Lesser General Public
+ License, the Free Software Foundation gives you unlimited
+ permission to link the compiled version of this file with other
+ programs, and to distribute those programs without any restriction
+ coming from the use of this file. (The Lesser General Public
+ License restrictions do apply in other respects; for example, they
+ cover modification of the file, and distribution when not linked
+ into another program.)
+
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
--
H.J.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 18:39 ` H.J. Lu
@ 2021-09-24 18:53 ` Joseph Myers
2021-09-24 18:58 ` H.J. Lu
0 siblings, 1 reply; 11+ messages in thread
From: Joseph Myers @ 2021-09-24 18:53 UTC (permalink / raw)
To: H.J. Lu; +Cc: Florian Weimer, Szabolcs Nagy, GNU C Library, Kirill A . Shutemov
On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:
> > In addition to the permissions in the GNU Lesser General Public
> > License, the Free Software Foundation gives you unlimited
> > permission to link the compiled version of this file with other
> > programs, and to distribute those programs without any restriction
> > coming from the use of this file. (The GNU Lesser General Public
> > License restrictions do apply in other respects; for example, they
> > cover modification of the file, and distribution when not linked
> > into another program.)
> >
> > Note that people who make modified versions of this file are not
> > obligated to grant this special exception for their modified
> > versions; it is their choice whether to do so. The GNU Lesser
> > General Public License gives permission to release a modified
> > version without this exception; this exception also makes it
> > possible to release a modified version which carries forward this
> > exception.
> I added the following change to set-translated-address-mask.c:
>
> @@ -6,6 +6,15 @@
> License as published by the Free Software Foundation; either
> version 2.1 of the License, or (at your option) any later version.
>
> + In addition to the permissions in the GNU Lesser General Public
> + License, the Free Software Foundation gives you unlimited
> + permission to link the compiled version of this file with other
> + programs, and to distribute those programs without any restriction
> + coming from the use of this file. (The Lesser General Public
> + License restrictions do apply in other respects; for example, they
> + cover modification of the file, and distribution when not linked
> + into another program.)
It's supposed to be both paragraphs quoted above, not just one.
--
Joseph S. Myers
joseph@codesourcery.com
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 18:53 ` Joseph Myers
@ 2021-09-24 18:58 ` H.J. Lu
2021-09-24 19:34 ` Joseph Myers
0 siblings, 1 reply; 11+ messages in thread
From: H.J. Lu @ 2021-09-24 18:58 UTC (permalink / raw)
To: Joseph Myers
Cc: Florian Weimer, Szabolcs Nagy, GNU C Library, Kirill A . Shutemov
On Fri, Sep 24, 2021 at 11:53 AM Joseph Myers <joseph@codesourcery.com> wrote:
>
> On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:
>
> > > In addition to the permissions in the GNU Lesser General Public
> > > License, the Free Software Foundation gives you unlimited
> > > permission to link the compiled version of this file with other
> > > programs, and to distribute those programs without any restriction
> > > coming from the use of this file. (The GNU Lesser General Public
> > > License restrictions do apply in other respects; for example, they
> > > cover modification of the file, and distribution when not linked
> > > into another program.)
> > >
> > > Note that people who make modified versions of this file are not
> > > obligated to grant this special exception for their modified
> > > versions; it is their choice whether to do so. The GNU Lesser
> > > General Public License gives permission to release a modified
> > > version without this exception; this exception also makes it
> > > possible to release a modified version which carries forward this
> > > exception.
>
> > I added the following change to set-translated-address-mask.c:
> >
> > @@ -6,6 +6,15 @@
> > License as published by the Free Software Foundation; either
> > version 2.1 of the License, or (at your option) any later version.
> >
> > + In addition to the permissions in the GNU Lesser General Public
> > + License, the Free Software Foundation gives you unlimited
> > + permission to link the compiled version of this file with other
> > + programs, and to distribute those programs without any restriction
> > + coming from the use of this file. (The Lesser General Public
> > + License restrictions do apply in other respects; for example, they
> > + cover modification of the file, and distribution when not linked
> > + into another program.)
>
> It's supposed to be both paragraphs quoted above, not just one.
>
> --
> Joseph S. Myers
> joseph@codesourcery.com
Here is the full text:
/* Copyright (C) 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.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The Lesser General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
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
<https://www.gnu.org/licenses/>. */
Does it look OK? If not, please attach the full text in your reply.
Thanks.
--
H.J.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 18:58 ` H.J. Lu
@ 2021-09-24 19:34 ` Joseph Myers
2021-09-24 22:00 ` H.J. Lu
0 siblings, 1 reply; 11+ messages in thread
From: Joseph Myers @ 2021-09-24 19:34 UTC (permalink / raw)
To: H.J. Lu; +Cc: Florian Weimer, Szabolcs Nagy, GNU C Library, Kirill A . Shutemov
On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:
> Here is the full text:
>
> /* Copyright (C) 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.
>
> In addition to the permissions in the GNU Lesser General Public
> License, the Free Software Foundation gives you unlimited
> permission to link the compiled version of this file with other
> programs, and to distribute those programs without any restriction
> coming from the use of this file. (The Lesser General Public
> License restrictions do apply in other respects; for example, they
> cover modification of the file, and distribution when not linked
> into another program.)
>
> 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
> <https://www.gnu.org/licenses/>. */
>
> Does it look OK? If not, please attach the full text in your reply.
See stdlib/atexit.c, for example. You're missing the "Note that people
who make modified versions of this file" paragraph.
--
Joseph S. Myers
joseph@codesourcery.com
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 19:34 ` Joseph Myers
@ 2021-09-24 22:00 ` H.J. Lu
0 siblings, 0 replies; 11+ messages in thread
From: H.J. Lu @ 2021-09-24 22:00 UTC (permalink / raw)
To: Joseph Myers
Cc: Florian Weimer, Szabolcs Nagy, GNU C Library, Kirill A . Shutemov
On Fri, Sep 24, 2021 at 12:35 PM Joseph Myers <joseph@codesourcery.com> wrote:
>
> On Fri, 24 Sep 2021, H.J. Lu via Libc-alpha wrote:
>
> > Here is the full text:
> >
> > /* Copyright (C) 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.
> >
> > In addition to the permissions in the GNU Lesser General Public
> > License, the Free Software Foundation gives you unlimited
> > permission to link the compiled version of this file with other
> > programs, and to distribute those programs without any restriction
> > coming from the use of this file. (The Lesser General Public
> > License restrictions do apply in other respects; for example, they
> > cover modification of the file, and distribution when not linked
> > into another program.)
> >
> > 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
> > <https://www.gnu.org/licenses/>. */
> >
> > Does it look OK? If not, please attach the full text in your reply.
>
> See stdlib/atexit.c, for example. You're missing the "Note that people
> who make modified versions of this file" paragraph.
>
Here is the updated full text:
/* Copyright (C) 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.
In addition to the permissions in the GNU Lesser General Public
License, the Free Software Foundation gives you unlimited
permission to link the compiled version of this file with other
programs, and to distribute those programs without any restriction
coming from the use of this file. (The GNU Lesser General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into another program.)
Note that people who make modified versions of this file are not
obligated to grant this special exception for their modified
versions; it is their choice whether to do so. The GNU Lesser
General Public License gives permission to release a modified
version without this exception; this exception also makes it
possible to release a modified version which carries forward this
exception.
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
<https://www.gnu.org/licenses/>. */
Thanks.
--
H.J.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address
2021-09-24 16:53 ` [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address H.J. Lu
@ 2021-10-04 13:58 ` H.J. Lu
0 siblings, 0 replies; 11+ messages in thread
From: H.J. Lu @ 2021-10-04 13:58 UTC (permalink / raw)
To: GNU C Library
Cc: Florian Weimer, Joseph Myers, Kirill A . Shutemov, Szabolcs Nagy,
Adhemerval Zanella, Sunil K Pandey
On Fri, Sep 24, 2021 at 9:53 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> By default, the number of the address bits used in address translation
> is the number of address bits. But it can be changed by ARM Top-byte
> Ignore (TBI) or Intel Linear Address Masking (LAM).
>
> <sys/tagged-address.h> provides an API for tagged address manipulation
> with restrictions:
>
> 1. All bits between 0 and N - 1, where N is the number of tagged address
> bits, are used in address translation.
> 2. All pointers participating in a pointer arithmetic operation should have
> the same tag if they point to the same memory object so that pointer
> equality operation can be performed on tagged pointers.
>
> /* Set the mask for address bits used in address translation. Return 0
> on success. Return -1 on error. */
> extern int set_translated_address_mask (uintptr_t __mask);
>
> /* Non-zero if constant address BITS is a valid tagged address bits. */
> #define TRANSLATED_ADDRESS_VALID_BITS(BITS)
>
> /* A mask for constant address BITS used in address translation. */
> #define TRANSLATED_ADDRESS_MASK(BITS)
>
> 1. set_translated_address_mask should be called as early as possible.
> 2. set_translated_address_mask shouldn't be allowed after main or thread
> creation.
> 3. After set_translated_address_mask is called, don't allow it to be
> called again to change the tagged address mask. Otherwise, the previously
> tagged addresses may not work anymore.
> ---
> NEWS | 2 +
> bits/tagged-address-mask.h | 47 +++++++++++++++++++++
> bits/tagged-address-valid-bits.h | 28 +++++++++++++
> csu/libc-start.c | 3 ++
> elf/dl-support.c | 5 +++
> include/sys/tagged-address.h | 19 +++++++++
> manual/Makefile | 3 +-
> manual/ctype.texi | 2 +-
> manual/memory.texi | 2 +-
> manual/tagged-address.texi | 48 +++++++++++++++++++++
> misc/Makefile | 48 ++++++++++++++++++---
> misc/set-translated-address-mask.c | 49 ++++++++++++++++++++++
> misc/sys/tagged-address.h | 33 +++++++++++++++
> misc/tagged-address.c | 50 ++++++++++++++++++++++
> misc/tst-tagged-address-1-static.c | 1 +
> misc/tst-tagged-address-1.c | 55 +++++++++++++++++++++++++
> misc/tst-tagged-address-2-static.c | 1 +
> misc/tst-tagged-address-2.c | 45 ++++++++++++++++++++
> misc/tst-tagged-address-3-static.c | 1 +
> misc/tst-tagged-address-3.c | 48 +++++++++++++++++++++
> misc/tst-tagged-address-4-static.c | 1 +
> misc/tst-tagged-address-4.c | 36 ++++++++++++++++
> misc/tst-tagged-address-5.c | 25 +++++++++++
> misc/tst-tagged-address-6.c | 34 +++++++++++++++
> misc/tst-tagged-address-7.c | 41 ++++++++++++++++++
> misc/tst-tagged-address-mod-5.c | 47 +++++++++++++++++++++
> misc/tst-tagged-address-mod-6.c | 34 +++++++++++++++
> misc/tst-tagged-address-mod-7.c | 35 ++++++++++++++++
> sysdeps/generic/inline-tagged-address.h | 43 +++++++++++++++++++
> sysdeps/generic/ldsodefs.h | 4 ++
> 30 files changed, 782 insertions(+), 8 deletions(-)
> create mode 100644 bits/tagged-address-mask.h
> create mode 100644 bits/tagged-address-valid-bits.h
> create mode 100644 include/sys/tagged-address.h
> create mode 100644 manual/tagged-address.texi
> create mode 100644 misc/set-translated-address-mask.c
> create mode 100644 misc/sys/tagged-address.h
> create mode 100644 misc/tagged-address.c
> create mode 100644 misc/tst-tagged-address-1-static.c
> create mode 100644 misc/tst-tagged-address-1.c
> create mode 100644 misc/tst-tagged-address-2-static.c
> create mode 100644 misc/tst-tagged-address-2.c
> create mode 100644 misc/tst-tagged-address-3-static.c
> create mode 100644 misc/tst-tagged-address-3.c
> create mode 100644 misc/tst-tagged-address-4-static.c
> create mode 100644 misc/tst-tagged-address-4.c
> create mode 100644 misc/tst-tagged-address-5.c
> create mode 100644 misc/tst-tagged-address-6.c
> create mode 100644 misc/tst-tagged-address-7.c
> create mode 100644 misc/tst-tagged-address-mod-5.c
> create mode 100644 misc/tst-tagged-address-mod-6.c
> create mode 100644 misc/tst-tagged-address-mod-7.c
> create mode 100644 sysdeps/generic/inline-tagged-address.h
>
The full Intel LAM support is on users/intel/lam/master branch:
https://gitlab.com/x86-glibc/glibc/-/tree/users/intel/lam/master
including Intel LAM marker checks and Intel LAM tests:
https://gitlab.com/x86-glibc/glibc/-/commit/c442a3becb0ec5bbc4c150dd48e64ebd7d287c32
--
H.J.
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-09-24 16:53 [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> H.J. Lu
2021-09-24 16:53 ` [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address H.J. Lu
2021-09-24 18:08 ` [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> Joseph Myers
@ 2021-11-15 13:34 ` Florian Weimer
2021-11-15 13:49 ` H.J. Lu
2 siblings, 1 reply; 11+ messages in thread
From: Florian Weimer @ 2021-11-15 13:34 UTC (permalink / raw)
To: H.J. Lu
Cc: libc-alpha, Joseph Myers, Kirill A . Shutemov, Szabolcs Nagy,
Adhemerval Zanella, Sunil K Pandey
* H. J. Lu:
> By default, the number of the address bits used in address translation
> is the number of address bits. But it can be changed by ARM Top-byte
> Ignore (TBI) or Intel Linear Address Masking (LAM).
>
> <sys/tagged-address.h> provides an API for tagged address manipulation.
H.J.,
we had an off-list discussion regarding this, and I want to double-check
if my recollection of the conclusion is correct.
Basically, we said that we would try to enable HWSAN on x86-64 as well
(using Intel LAM) *without* glibc changes or a new ABI. Once we have a
better understanding of how address tagging is used/could be used by
applications, we plan to define a general-purpose programming interface
for it.
Thanks,
Florian
^ permalink raw reply [flat|nested] 11+ messages in thread
* Re: [PATCH v7 0/1] RFC: Add <sys/tagged-address.h>
2021-11-15 13:34 ` Florian Weimer
@ 2021-11-15 13:49 ` H.J. Lu
0 siblings, 0 replies; 11+ messages in thread
From: H.J. Lu @ 2021-11-15 13:49 UTC (permalink / raw)
To: Florian Weimer
Cc: GNU C Library, Joseph Myers, Kirill A . Shutemov, Szabolcs Nagy,
Adhemerval Zanella, Sunil K Pandey
On Mon, Nov 15, 2021 at 5:34 AM Florian Weimer <fweimer@redhat.com> wrote:
>
> * H. J. Lu:
>
> > By default, the number of the address bits used in address translation
> > is the number of address bits. But it can be changed by ARM Top-byte
> > Ignore (TBI) or Intel Linear Address Masking (LAM).
> >
> > <sys/tagged-address.h> provides an API for tagged address manipulation.
>
> H.J.,
>
> we had an off-list discussion regarding this, and I want to double-check
> if my recollection of the conclusion is correct.
>
> Basically, we said that we would try to enable HWSAN on x86-64 as well
> (using Intel LAM) *without* glibc changes or a new ABI. Once we have a
> better understanding of how address tagging is used/could be used by
> applications, we plan to define a general-purpose programming interface
> for it.
I withdrew this patch.
My current LAM patch is
https://gitlab.com/x86-glibc/glibc/-/commit/9d8fb211169fe677d3feca74aef5e87595f934ef
I will submit it after the LAM kernel interface is finalized.
--
H.J.
^ permalink raw reply [flat|nested] 11+ messages in thread
end of thread, other threads:[~2021-11-15 13:49 UTC | newest]
Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-09-24 16:53 [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> H.J. Lu
2021-09-24 16:53 ` [PATCH v7 1/1] <sys/tagged-address.h>: An API for tagged address H.J. Lu
2021-10-04 13:58 ` H.J. Lu
2021-09-24 18:08 ` [PATCH v7 0/1] RFC: Add <sys/tagged-address.h> Joseph Myers
2021-09-24 18:39 ` H.J. Lu
2021-09-24 18:53 ` Joseph Myers
2021-09-24 18:58 ` H.J. Lu
2021-09-24 19:34 ` Joseph Myers
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2021-11-15 13:49 ` H.J. Lu
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