601650f878
* Tue May 31 2022 Arjun Shankar <arjun@redhat.com> - 2.34-35
- Sync with upstream branch release/2.34/master,
commit ff450cdbdee0b8cb6b9d653d6d2fa892de29be31:
- Fix deadlock when pthread_atfork handler calls pthread_atfork or dlclose
- x86: Fallback {str|wcs}cmp RTM in the ncmp overflow case [BZ #29127]
- string.h: fix __fortified_attr_access macro call [BZ #29162]
- linux: Add a getauxval test [BZ #23293]
- rtld: Use generic argv adjustment in ld.so [BZ #23293]
- S390: Enable static PIE
* Thu May 19 2022 Florian Weimer <fweimer@redhat.com> - 2.34-34
- Sync with upstream branch release/2.34/master,
commit ede8d94d154157d269b18f3601440ac576c1f96a:
- csu: Implement and use _dl_early_allocate during static startup
- Linux: Introduce __brk_call for invoking the brk system call
- Linux: Implement a useful version of _startup_fatal
- ia64: Always define IA64_USE_NEW_STUB as a flag macro
- Linux: Define MMAP_CALL_INTERNAL
- i386: Honor I386_USE_SYSENTER for 6-argument Linux system calls
- i386: Remove OPTIMIZE_FOR_GCC_5 from Linux libc-do-syscall.S
- elf: Remove __libc_init_secure
- Linux: Consolidate auxiliary vector parsing (redo)
- Linux: Include <dl-auxv.h> in dl-sysdep.c only for SHARED
- Revert "Linux: Consolidate auxiliary vector parsing"
- Linux: Consolidate auxiliary vector parsing
- Linux: Assume that NEED_DL_SYSINFO_DSO is always defined
- Linux: Remove DL_FIND_ARG_COMPONENTS
- Linux: Remove HAVE_AUX_SECURE, HAVE_AUX_XID, HAVE_AUX_PAGESIZE
- elf: Merge dl-sysdep.c into the Linux version
- elf: Remove unused NEED_DL_BASE_ADDR and _dl_base_addr
- x86: Optimize {str|wcs}rchr-evex
- x86: Optimize {str|wcs}rchr-avx2
- x86: Optimize {str|wcs}rchr-sse2
- x86: Cleanup page cross code in memcmp-avx2-movbe.S
- x86: Remove memcmp-sse4.S
- x86: Small improvements for wcslen
- x86: Remove AVX str{n}casecmp
- x86: Add EVEX optimized str{n}casecmp
- x86: Add AVX2 optimized str{n}casecmp
- x86: Optimize str{n}casecmp TOLOWER logic in strcmp-sse42.S
- x86: Optimize str{n}casecmp TOLOWER logic in strcmp.S
- x86: Remove strspn-sse2.S and use the generic implementation
- x86: Remove strpbrk-sse2.S and use the generic implementation
- x87: Remove strcspn-sse2.S and use the generic implementation
- x86: Optimize strspn in strspn-c.c
- x86: Optimize strcspn and strpbrk in strcspn-c.c
- x86: Code cleanup in strchr-evex and comment justifying branch
- x86: Code cleanup in strchr-avx2 and comment justifying branch
- x86_64: Remove bcopy optimizations
- x86-64: Remove bzero weak alias in SS2 memset
- x86_64/multiarch: Sort sysdep_routines and put one entry per line
- x86: Improve L to support L(XXX_SYMBOL (YYY, ZZZ))
- fortify: Ensure that __glibc_fortify condition is a constant [BZ #29141]
* Thu May 12 2022 Florian Weimer <fweimer@redhat.com> - 2.34-33
- Sync with upstream branch release/2.34/master,
commit 91c2e6c3db44297bf4cb3a2e3c40236c5b6a0b23:
- dlfcn: Implement the RTLD_DI_PHDR request type for dlinfo
- manual: Document the dlinfo function
- x86: Fix fallback for wcsncmp_avx2 in strcmp-avx2.S [BZ #28896]
- x86: Fix bug in strncmp-evex and strncmp-avx2 [BZ #28895]
- x86: Set .text section in memset-vec-unaligned-erms
- x86-64: Optimize bzero
- x86: Remove SSSE3 instruction for broadcast in memset.S (SSE2 Only)
- x86: Improve vec generation in memset-vec-unaligned-erms.S
- x86-64: Fix strcmp-evex.S
- x86-64: Fix strcmp-avx2.S
- x86: Optimize strcmp-evex.S
- x86: Optimize strcmp-avx2.S
- manual: Clarify that abbreviations of long options are allowed
- Add HWCAP2_AFP, HWCAP2_RPRES from Linux 5.17 to AArch64 bits/hwcap.h
- aarch64: Add HWCAP2_ECV from Linux 5.16
- Add SOL_MPTCP, SOL_MCTP from Linux 5.16 to bits/socket.h
- Update kernel version to 5.17 in tst-mman-consts.py
- Update kernel version to 5.16 in tst-mman-consts.py
- Update syscall lists for Linux 5.17
- Add ARPHRD_CAN, ARPHRD_MCTP to net/if_arp.h
- Update kernel version to 5.15 in tst-mman-consts.py
- Add PF_MCTP, AF_MCTP from Linux 5.15 to bits/socket.h
Resolves: #2091541
95 lines
3.5 KiB
Diff
95 lines
3.5 KiB
Diff
commit 1a5b9d1a231ae788aac3520dab07dc856e404c69
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Wed May 4 15:37:21 2022 +0200
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i386: Honor I386_USE_SYSENTER for 6-argument Linux system calls
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Introduce an int-80h-based version of __libc_do_syscall and use
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it if I386_USE_SYSENTER is defined as 0.
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Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
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(cherry picked from commit 60f0f2130d30cfd008ca39743027f1e200592dff)
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diff --git a/sysdeps/unix/sysv/linux/i386/Makefile b/sysdeps/unix/sysv/linux/i386/Makefile
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index abd0009d58f06303..e379a2e767d96322 100644
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--- a/sysdeps/unix/sysv/linux/i386/Makefile
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+++ b/sysdeps/unix/sysv/linux/i386/Makefile
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@@ -14,7 +14,7 @@ install-bin += lddlibc4
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endif
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ifeq ($(subdir),io)
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-sysdep_routines += libc-do-syscall
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+sysdep_routines += libc-do-syscall libc-do-syscall-int80
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endif
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ifeq ($(subdir),stdlib)
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diff --git a/sysdeps/unix/sysv/linux/i386/libc-do-syscall-int80.S b/sysdeps/unix/sysv/linux/i386/libc-do-syscall-int80.S
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new file mode 100644
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index 0000000000000000..2c472f255734b357
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/i386/libc-do-syscall-int80.S
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@@ -0,0 +1,25 @@
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+/* Out-of-line syscall stub for six-argument syscalls from C. For static PIE.
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+ Copyright (C) 2022 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#ifndef SHARED
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+# define I386_USE_SYSENTER 0
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+# include <sysdep.h>
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+
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+# define __libc_do_syscall __libc_do_syscall_int80
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+# include "libc-do-syscall.S"
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+#endif
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diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
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index 39d6a3c13427abb5..4c6358c7fe43fe0b 100644
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--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
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+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
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@@ -43,6 +43,15 @@
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# endif
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#endif
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+#if !I386_USE_SYSENTER && IS_IN (libc) && !defined SHARED
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+/* Inside static libc, we have two versions. For compilation units
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+ with !I386_USE_SYSENTER, the vDSO entry mechanism cannot be
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+ used. */
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+# define I386_DO_SYSCALL_STRING "__libc_do_syscall_int80"
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+#else
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+# define I386_DO_SYSCALL_STRING "__libc_do_syscall"
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+#endif
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+
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#ifdef __ASSEMBLER__
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/* Linux uses a negative return value to indicate syscall errors,
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@@ -302,7 +311,7 @@ struct libc_do_syscall_args
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}; \
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asm volatile ( \
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"movl %1, %%eax\n\t" \
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- "call __libc_do_syscall" \
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+ "call " I386_DO_SYSCALL_STRING \
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: "=a" (resultvar) \
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: "i" (__NR_##name), "c" (arg2), "d" (arg3), "S" (arg4), "D" (&_xv) \
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: "memory", "cc")
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@@ -316,7 +325,7 @@ struct libc_do_syscall_args
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}; \
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asm volatile ( \
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"movl %1, %%eax\n\t" \
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- "call __libc_do_syscall" \
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+ "call " I386_DO_SYSCALL_STRING \
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: "=a" (resultvar) \
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: "a" (name), "c" (arg2), "d" (arg3), "S" (arg4), "D" (&_xv) \
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: "memory", "cc")
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