From 942fa985e9f161ac018ce2230d3e6f7668cca6ac Mon Sep 17 00:00:00 2001 From: Yury Norov Date: Wed, 16 May 2018 11:18:49 +0300 Subject: 32-bit userspace ABI: introduce ARCH_32BIT_OFF_T config option All new 32-bit architectures should have 64-bit userspace off_t type, but existing architectures has 32-bit ones. To enforce the rule, new config option is added to arch/Kconfig that defaults ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing 32-bit architectures enable it explicitly. New option affects force_o_largefile() behaviour. Namely, if userspace off_t is 64-bits long, we have no reason to reject user to open big files. Note that even if architectures has only 64-bit off_t in the kernel (arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32), a libc may use 32-bit off_t, and therefore want to limit the file size to 4GB unless specified differently in the open flags. Signed-off-by: Yury Norov Acked-by: Arnd Bergmann Signed-off-by: Yury Norov Signed-off-by: Arnd Bergmann --- arch/unicore32/Kconfig | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/unicore32') diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig index c3a41bfe161b..a7f1ae58d211 100644 --- a/arch/unicore32/Kconfig +++ b/arch/unicore32/Kconfig @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 config UNICORE32 def_bool y + select ARCH_32BIT_OFF_T select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_MIGHT_HAVE_PC_PARPORT select ARCH_MIGHT_HAVE_PC_SERIO -- cgit v1.2.3 From 80d7da1cac62f28b3df4880e8143b39cabb4b59a Mon Sep 17 00:00:00 2001 From: Yury Norov Date: Wed, 16 May 2018 11:18:50 +0300 Subject: asm-generic: Drop getrlimit and setrlimit syscalls from default list The newer prlimit64 syscall provides all the functionality of getrlimit and setrlimit syscalls and adds the pid of target process, so future architectures won't need to include getrlimit and setrlimit. Therefore drop getrlimit and setrlimit syscalls from the generic syscall list unless __ARCH_WANT_SET_GET_RLIMIT is defined by the architecture's unistd.h prior to including asm-generic/unistd.h, and adjust all architectures using the generic syscall list to define it so that no in-tree architectures are affected. Cc: Arnd Bergmann Cc: linux-arch@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-hexagon@vger.kernel.org Cc: uclinux-h8-devel@lists.sourceforge.jp Signed-off-by: Yury Norov Acked-by: Arnd Bergmann Acked-by: Mark Salter [c6x] Acked-by: James Hogan [metag] Acked-by: Ley Foon Tan [nios2] Acked-by: Stafford Horne [openrisc] Acked-by: Will Deacon [arm64] Acked-by: Vineet Gupta #arch/arc bits Signed-off-by: Yury Norov Signed-off-by: Arnd Bergmann --- arch/unicore32/include/uapi/asm/unistd.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/unicore32') diff --git a/arch/unicore32/include/uapi/asm/unistd.h b/arch/unicore32/include/uapi/asm/unistd.h index 1e8fe5941b8a..2b575c0cf177 100644 --- a/arch/unicore32/include/uapi/asm/unistd.h +++ b/arch/unicore32/include/uapi/asm/unistd.h @@ -12,6 +12,7 @@ */ #define __ARCH_WANT_RENAMEAT +#define __ARCH_WANT_SET_GET_RLIMIT /* Use the standard ABI for syscalls. */ #include -- cgit v1.2.3 From c8ce48f06503eee20f189eed5b2aa736272b7344 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 18 Feb 2019 17:30:06 +0100 Subject: asm-generic: Make time32 syscall numbers optional We don't want new architectures to even provide the old 32-bit time_t based system calls any more, or define the syscall number macros. Add a new __ARCH_WANT_TIME32_SYSCALLS macro that gets enabled for all existing 32-bit architectures using the generic system call table, so we don't change any current behavior. Since this symbol is evaluated in user space as well, we cannot use a Kconfig CONFIG_* macro but have to define it in uapi/asm/unistd.h. On 64-bit architectures, the same system call numbers mostly refer to the system calls we want to keep, as they already pass 64-bit time_t. As new architectures no longer provide these, we need new exceptions in checksyscalls.sh. Signed-off-by: Arnd Bergmann --- arch/unicore32/include/uapi/asm/unistd.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/unicore32') diff --git a/arch/unicore32/include/uapi/asm/unistd.h b/arch/unicore32/include/uapi/asm/unistd.h index 2b575c0cf177..4e5e624f5d7e 100644 --- a/arch/unicore32/include/uapi/asm/unistd.h +++ b/arch/unicore32/include/uapi/asm/unistd.h @@ -13,6 +13,7 @@ #define __ARCH_WANT_RENAMEAT #define __ARCH_WANT_SET_GET_RLIMIT +#define __ARCH_WANT_TIME32_SYSCALLS /* Use the standard ABI for syscalls. */ #include -- cgit v1.2.3 From 8e9f51a8851b6942f587d9842d748c4aacbf7d4f Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 18 Feb 2019 17:35:58 +0100 Subject: unicore32: Fix __ARCH_WANT_STAT64 definition The __ARCH_WANT_STAT64 macro must be defined before including asm-generic/unistd.h. I got this right for everything except unicore32. Fixes: bf4b6a7d371e ("y2038: Remove stat64 family from default syscall set") Signed-off-by: Arnd Bergmann --- arch/unicore32/include/uapi/asm/unistd.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/unicore32') diff --git a/arch/unicore32/include/uapi/asm/unistd.h b/arch/unicore32/include/uapi/asm/unistd.h index 4e5e624f5d7e..54a7378a70b1 100644 --- a/arch/unicore32/include/uapi/asm/unistd.h +++ b/arch/unicore32/include/uapi/asm/unistd.h @@ -13,9 +13,9 @@ #define __ARCH_WANT_RENAMEAT #define __ARCH_WANT_SET_GET_RLIMIT +#define __ARCH_WANT_STAT64 #define __ARCH_WANT_TIME32_SYSCALLS /* Use the standard ABI for syscalls. */ #include -#define __ARCH_WANT_STAT64 #define __ARCH_WANT_SYS_CLONE -- cgit v1.2.3