From 784567f4b0cb0df300aa9a87de2596df5c0038b3 Mon Sep 17 00:00:00 2001 From: Eric B Munson Date: Mon, 9 Nov 2015 14:58:03 -0800 Subject: mips: add entry for new mlock2 syscall A previous commit introduced the new mlock2 syscall, add entries for the MIPS architecture. Signed-off-by: Eric B Munson Acked-by: Ralf Baechle Cc: Catalin Marinas Cc: Geert Uytterhoeven Cc: Guenter Roeck Cc: Heiko Carstens Cc: Jonathan Corbet Cc: Kirill A. Shutemov Cc: Michael Kerrisk Cc: Michal Hocko Cc: Shuah Khan Cc: Stephen Rothwell Cc: Vlastimil Babka Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/mips/include/uapi/asm/unistd.h | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) (limited to 'arch/mips/include/uapi/asm') diff --git a/arch/mips/include/uapi/asm/unistd.h b/arch/mips/include/uapi/asm/unistd.h index cfabadb135d9..90f03a7da665 100644 --- a/arch/mips/include/uapi/asm/unistd.h +++ b/arch/mips/include/uapi/asm/unistd.h @@ -379,16 +379,17 @@ #define __NR_execveat (__NR_Linux + 356) #define __NR_userfaultfd (__NR_Linux + 357) #define __NR_membarrier (__NR_Linux + 358) +#define __NR_mlock2 (__NR_Linux + 359) /* * Offset of the last Linux o32 flavoured syscall */ -#define __NR_Linux_syscalls 358 +#define __NR_Linux_syscalls 359 #endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */ #define __NR_O32_Linux 4000 -#define __NR_O32_Linux_syscalls 358 +#define __NR_O32_Linux_syscalls 359 #if _MIPS_SIM == _MIPS_SIM_ABI64 @@ -715,16 +716,17 @@ #define __NR_execveat (__NR_Linux + 316) #define __NR_userfaultfd (__NR_Linux + 317) #define __NR_membarrier (__NR_Linux + 318) +#define __NR_mlock2 (__NR_Linux + 319) /* * Offset of the last Linux 64-bit flavoured syscall */ -#define __NR_Linux_syscalls 318 +#define __NR_Linux_syscalls 319 #endif /* _MIPS_SIM == _MIPS_SIM_ABI64 */ #define __NR_64_Linux 5000 -#define __NR_64_Linux_syscalls 318 +#define __NR_64_Linux_syscalls 319 #if _MIPS_SIM == _MIPS_SIM_NABI32 @@ -1055,15 +1057,16 @@ #define __NR_execveat (__NR_Linux + 320) #define __NR_userfaultfd (__NR_Linux + 321) #define __NR_membarrier (__NR_Linux + 322) +#define __NR_mlock2 (__NR_Linux + 323) /* * Offset of the last N32 flavoured syscall */ -#define __NR_Linux_syscalls 322 +#define __NR_Linux_syscalls 323 #endif /* _MIPS_SIM == _MIPS_SIM_NABI32 */ #define __NR_N32_Linux 6000 -#define __NR_N32_Linux_syscalls 322 +#define __NR_N32_Linux_syscalls 323 #endif /* _UAPI_ASM_UNISTD_H */ -- cgit v1.2.1 From ebb5e78cc63417a35254a791de66e1cc84f963cc Mon Sep 17 00:00:00 2001 From: Alex Smith Date: Wed, 21 Oct 2015 09:54:38 +0100 Subject: MIPS: Initial implementation of a VDSO Add an initial implementation of a proper (i.e. an ELF shared library) VDSO. With this commit it does not export any symbols, it only replaces the current signal return trampoline page. A later commit will add user implementations of gettimeofday()/clock_gettime(). To support both new toolchains and old ones which don't generate ABI flags section, we define its content manually and then use a tool (genvdso) to patch up the section to have the correct name and type. genvdso also extracts symbol offsets ({,rt_}sigreturn) needed by the kernel, and generates a C file containing a "struct mips_vdso_image" containing both the VDSO data and these offsets. This C file is compiled into the kernel. On 64-bit kernels we require a different VDSO for each supported ABI, so we may build up to 3 different VDSOs. The VDSO to use is selected by the mips_abi structure. A kernel/user shared data page is created and mapped below the VDSO image. This is currently empty, but will be used by the user time function implementations which are added later. [markos.chandras@imgtec.com: - Add more comments - Move abi detection in genvdso.h since it's the get_symbol function that needs it. - Add an R6 specific way to calculate the base address of VDSO in order to avoid the branch instruction which affects performance. - Do not patch .gnu.attributes since it's not needed for dynamic linking. - Simplify Makefile a little bit. - checkpatch fixes - Restrict VDSO support for binutils < 2.25 for pre-R6 - Include atomic64.h for O32 variant on MIPS64] Signed-off-by: Alex Smith Signed-off-by: Markos Chandras Cc: Matthew Fortune Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11337/ Signed-off-by: Ralf Baechle --- arch/mips/include/uapi/asm/Kbuild | 2 +- arch/mips/include/uapi/asm/auxvec.h | 17 +++++++++++++++++ 2 files changed, 18 insertions(+), 1 deletion(-) create mode 100644 arch/mips/include/uapi/asm/auxvec.h (limited to 'arch/mips/include/uapi/asm') diff --git a/arch/mips/include/uapi/asm/Kbuild b/arch/mips/include/uapi/asm/Kbuild index 96fe7395ed8d..f2cf41461146 100644 --- a/arch/mips/include/uapi/asm/Kbuild +++ b/arch/mips/include/uapi/asm/Kbuild @@ -1,9 +1,9 @@ # UAPI Header export list include include/uapi/asm-generic/Kbuild.asm -generic-y += auxvec.h generic-y += ipcbuf.h +header-y += auxvec.h header-y += bitfield.h header-y += bitsperlong.h header-y += break.h diff --git a/arch/mips/include/uapi/asm/auxvec.h b/arch/mips/include/uapi/asm/auxvec.h new file mode 100644 index 000000000000..c9c7195272c4 --- /dev/null +++ b/arch/mips/include/uapi/asm/auxvec.h @@ -0,0 +1,17 @@ +/* + * Copyright (C) 2015 Imagination Technologies + * Author: Alex Smith + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __ASM_AUXVEC_H +#define __ASM_AUXVEC_H + +/* Location of VDSO image. */ +#define AT_SYSINFO_EHDR 33 + +#endif /* __ASM_AUXVEC_H */ -- cgit v1.2.1