From: "H.J. Lu" <hjl.tools@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH v6] x86_64: Correct THREAD_SETMEM/THREAD_SETMEM_NC for movq [BZ #27591]
Date: Fri, 19 Mar 2021 11:35:36 -0700 [thread overview]
Message-ID: <20210319183536.1663081-1-hjl.tools@gmail.com> (raw)
config/i386/constraints.md in GCC has
(define_constraint "e"
"32-bit signed integer constant, or a symbolic reference known
to fit that range (for immediate operands in sign-extending x86-64
instructions)."
(match_operand 0 "x86_64_immediate_operand"))
Since movq takes a signed 32-bit immediate or a register source operand,
use "er", instead of "nr"/"ir", constraint for 32-bit signed integer
constant or register on movq.
---
sysdeps/x86_64/Makefile | 2 +
sysdeps/x86_64/nptl/tls.h | 10 ++++-
sysdeps/x86_64/tst-x86-64-tls-1.c | 64 +++++++++++++++++++++++++++++++
3 files changed, 74 insertions(+), 2 deletions(-)
create mode 100644 sysdeps/x86_64/tst-x86-64-tls-1.c
diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
index d1d7cb9d2e..06a444b6af 100644
--- a/sysdeps/x86_64/Makefile
+++ b/sysdeps/x86_64/Makefile
@@ -183,6 +183,8 @@ ifeq (no,$(build-hardcoded-path-in-tests))
tests-container += tst-glibc-hwcaps-cache
endif
+tests-internal += tst-x86-64-tls-1
+
endif # $(subdir) == elf
ifeq ($(subdir),csu)
diff --git a/sysdeps/x86_64/nptl/tls.h b/sysdeps/x86_64/nptl/tls.h
index 20f0958780..a78c4f4d01 100644
--- a/sysdeps/x86_64/nptl/tls.h
+++ b/sysdeps/x86_64/nptl/tls.h
@@ -271,8 +271,11 @@ _Static_assert (offsetof (tcbhead_t, __glibc_unused2) == 0x80,
"i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
+ /* Since movq takes a signed 32-bit immediate or a register source \
+ operand, use "er" constraint for 32-bit signed integer constant \
+ or register. */ \
asm volatile ("movq %q0,%%fs:%P1" : \
- : IMM_MODE ((uint64_t) cast_to_integer (value)), \
+ : "er" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member))); \
}})
@@ -296,8 +299,11 @@ _Static_assert (offsetof (tcbhead_t, __glibc_unused2) == 0x80,
"r" (idx)); \
else /* 8 */ \
{ \
+ /* Since movq takes a signed 32-bit immediate or a register source \
+ operand, use "er" constraint for 32-bit signed integer constant \
+ or register. */ \
asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \
- : IMM_MODE ((uint64_t) cast_to_integer (value)), \
+ : "er" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
}})
diff --git a/sysdeps/x86_64/tst-x86-64-tls-1.c b/sysdeps/x86_64/tst-x86-64-tls-1.c
new file mode 100644
index 0000000000..354635884e
--- /dev/null
+++ b/sysdeps/x86_64/tst-x86-64-tls-1.c
@@ -0,0 +1,64 @@
+/* Test THREAD_SETMEM and THREAD_SETMEM_NC for IMM64.
+ 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 <tls.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ unsigned long long int saved_ssp_base, ssp_base;
+ saved_ssp_base = THREAD_GETMEM (THREAD_SELF, header.ssp_base);
+
+ THREAD_SETMEM (THREAD_SELF, header.ssp_base, (1ULL << 57) - 1);
+ ssp_base = THREAD_GETMEM (THREAD_SELF, header.ssp_base);
+ if (ssp_base != ((1ULL << 57) - 1))
+ FAIL_EXIT1 ("THREAD_SETMEM: 0x%llx != 0x%llx",
+ ssp_base, (1ULL << 57) - 1);
+
+ THREAD_SETMEM (THREAD_SELF, header.ssp_base, -1ULL);
+ ssp_base = THREAD_GETMEM (THREAD_SELF, header.ssp_base);
+ if (ssp_base != -1ULL)
+ FAIL_EXIT1 ("THREAD_SETMEM: 0x%llx != 0x%llx", ssp_base, -1ULL);
+
+ THREAD_SETMEM (THREAD_SELF, header.ssp_base, saved_ssp_base);
+#ifndef __ILP32__
+ struct pthread_key_data *saved_specific, *specific;
+ saved_specific = THREAD_GETMEM_NC (THREAD_SELF, specific, 1);
+
+ uintptr_t value = (1UL << 57) - 1;
+ THREAD_SETMEM_NC (THREAD_SELF, specific, 1,
+ (struct pthread_key_data *) value);
+ specific = THREAD_GETMEM_NC (THREAD_SELF, specific, 1);
+ if (specific != (struct pthread_key_data *) value)
+ FAIL_EXIT1 ("THREAD_GETMEM_NC: %p != %p",
+ specific, (struct pthread_key_data *) value);
+
+ THREAD_SETMEM_NC (THREAD_SELF, specific, 1,
+ (struct pthread_key_data *) -1UL);
+ specific = THREAD_GETMEM_NC (THREAD_SELF, specific, 1);
+ if (specific != (struct pthread_key_data *) -1UL)
+ FAIL_EXIT1 ("THREAD_GETMEM_NC: %p != %p",
+ specific, (struct pthread_key_data *) -1UL);
+
+ THREAD_SETMEM_NC (THREAD_SELF, specific, 1, saved_specific);
+#endif
+ return 0;
+}
+
+#include <support/test-driver.c>
--
2.30.2
next reply other threads:[~2021-03-19 18:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-19 18:35 H.J. Lu [this message]
2021-04-01 13:51 ` Carlos O'Donell
-- strict thread matches above, loose matches on Subject: below --
2021-02-02 19:12 [PATCH] x86_64: Update THREAD_SETMEM/THREAD_SETMEM_NC for IMM64 H.J. Lu
2021-03-01 13:30 ` Carlos O'Donell
2021-03-02 14:21 ` [PATCH v2] " H.J. Lu
2021-03-08 22:28 ` Carlos O'Donell
2021-03-09 0:09 ` [PATCH v3] " H.J. Lu
2021-03-15 12:49 ` Carlos O'Donell
2021-03-15 13:29 ` [PATCH v4] " H.J. Lu
2021-03-16 3:01 ` Carlos O'Donell
2021-03-16 9:04 ` Andreas Schwab
2021-03-16 15:45 ` [PATCH v5] x86_64: Update THREAD_SETMEM/THREAD_SETMEM_NC for IMM64 [BZ #27591] H.J. Lu
2021-03-16 16:02 ` Andreas Schwab
2021-03-16 16:10 ` Florian Weimer
2021-03-16 16:34 ` Carlos O'Donell
2021-03-16 16:50 ` [PATCH v6] x86_64: Correct THREAD_SETMEM/THREAD_SETMEM_NC for movq " H.J. Lu
2021-03-16 16:52 ` H.J. Lu
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