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Message-ID: <1447795019-30176-14-git-send-email-ynorov@caviumnetworks.com> Date: Wed, 18 Nov 2015 00:16:53 +0300 From: Yury Norov <ynorov@...iumnetworks.com> To: <arnd@...db.de>, <catalin.marinas@....com>, <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org> CC: <pinskia@...il.com>, <ddaney.cavm@...il.com>, <jan.dakinevich@...il.com>, <Prasun.Kapoor@...iumnetworks.com>, <christoph.muellner@...obroma-systems.com>, <philipp.tomsich@...obroma-systems.com>, <broonie@...nel.org>, <andrey.konovalov@...aro.org>, <Nathan_Lynch@...tor.com>, <agraf@...e.de>, <bamvor.zhangjian@...wei.com>, <klimov.linux@...il.com>, <joseph@...esourcery.com>, <schwab@...e.de>, Yury Norov <ynorov@...iumnetworks.com> Subject: [PATCH v6 13/19] arm64: ilp32: common 32-bit wrappers From: Jan Dakinevich <jan.dakinevich@...il.com> Reviewed-by: David Daney <ddaney@...iumnetworks.com> Signed-off-by: Yury Norov <ynorov@...iumnetworks.com> Signed-off-by: Jan Dakinevich <jan.dakinevich@...il.com> --- arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/entry32-common.S | 37 +++++++++++++++++++++++++++++++++++++ arch/arm64/kernel/entry32.S | 29 ----------------------------- 3 files changed, 38 insertions(+), 29 deletions(-) create mode 100644 arch/arm64/kernel/entry32-common.S diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile index 1470332..35a59af 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -24,6 +24,7 @@ arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \ sys_compat.o entry32.o \ ../../arm/kernel/opcodes.o arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o +arm64-obj-$(CONFIG_COMPAT) += entry32-common.o arm64-obj-$(CONFIG_MODULES) += arm64ksyms.o module.o arm64-obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o arm64-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o diff --git a/arch/arm64/kernel/entry32-common.S b/arch/arm64/kernel/entry32-common.S new file mode 100644 index 0000000..2ad5912 --- /dev/null +++ b/arch/arm64/kernel/entry32-common.S @@ -0,0 +1,37 @@ +#include <linux/linkage.h> +#include <linux/const.h> + +#include <asm/assembler.h> +#include <asm/asm-offsets.h> +#include <asm/errno.h> +#include <asm/page.h> + +ENTRY(compat_sys_statfs64_wrapper) + mov w3, #84 + cmp w1, #88 + csel w1, w3, w1, eq + b compat_sys_statfs64 +ENDPROC(compat_sys_statfs64_wrapper) + +ENTRY(compat_sys_fstatfs64_wrapper) + mov w3, #84 + cmp w1, #88 + csel w1, w3, w1, eq + b compat_sys_fstatfs64 +ENDPROC(compat_sys_fstatfs64_wrapper) + +/* + * Note: off_4k (w5) is always in units of 4K. If we can't do the + * requested offset because it is not page-aligned, we return -EINVAL. + */ +ENTRY(compat_sys_mmap2_wrapper) +#if PAGE_SHIFT > 12 + tst w5, #~PAGE_MASK >> 12 + b.ne 1f + lsr w5, w5, #PAGE_SHIFT - 12 +#endif + b sys_mmap_pgoff +1: mov x0, #-EINVAL + ret +ENDPROC(compat_sys_mmap2_wrapper) + diff --git a/arch/arm64/kernel/entry32.S b/arch/arm64/kernel/entry32.S index f332d5d..8026129 100644 --- a/arch/arm64/kernel/entry32.S +++ b/arch/arm64/kernel/entry32.S @@ -40,35 +40,6 @@ ENTRY(compat_sys_rt_sigreturn_wrapper) b compat_sys_rt_sigreturn ENDPROC(compat_sys_rt_sigreturn_wrapper) -ENTRY(compat_sys_statfs64_wrapper) - mov w3, #84 - cmp w1, #88 - csel w1, w3, w1, eq - b compat_sys_statfs64 -ENDPROC(compat_sys_statfs64_wrapper) - -ENTRY(compat_sys_fstatfs64_wrapper) - mov w3, #84 - cmp w1, #88 - csel w1, w3, w1, eq - b compat_sys_fstatfs64 -ENDPROC(compat_sys_fstatfs64_wrapper) - -/* - * Note: off_4k (w5) is always in units of 4K. If we can't do the - * requested offset because it is not page-aligned, we return -EINVAL. - */ -ENTRY(compat_sys_mmap2_wrapper) -#if PAGE_SHIFT > 12 - tst w5, #~PAGE_MASK >> 12 - b.ne 1f - lsr w5, w5, #PAGE_SHIFT - 12 -#endif - b sys_mmap_pgoff -1: mov x0, #-EINVAL - ret -ENDPROC(compat_sys_mmap2_wrapper) - /* * Wrappers for AArch32 syscalls that either take 64-bit parameters * in registers or that take 32-bit parameters which require sign -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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