From: Jan Dakinevich <[email protected]> statfs64, fstat64 and mmap_pgoff has wrappers that needed both by aarch32 and ilp32 to workaround some issues. Here we create common file to share aarch32 workarounds to with ilp32 code.
Reviewed-by: David Daney <[email protected]> Signed-off-by: Yury Norov <[email protected]> Signed-off-by: Jan Dakinevich <[email protected]> --- arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/entry32-common.S | 37 +++++++++++++++++++++++++++++++++++++ arch/arm64/kernel/entry32.S | 29 ----------------------------- arch/arm64/kernel/sys_ilp32.c | 9 +++++++++ 4 files changed, 47 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 8787347..837d730 100644 --- a/arch/arm64/kernel/Makefile +++ b/arch/arm64/kernel/Makefile @@ -25,6 +25,7 @@ arm64-obj-$(CONFIG_AARCH32_EL0) += sys32.o kuser32.o signal32.o \ ../../arm/kernel/opcodes.o arm64-obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o entry-ftrace.o arm64-obj-$(CONFIG_ARM64_ILP32) += sys_ilp32.o +arm64-obj-$(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 diff --git a/arch/arm64/kernel/sys_ilp32.c b/arch/arm64/kernel/sys_ilp32.c index 8ce79db..c282fa2 100644 --- a/arch/arm64/kernel/sys_ilp32.c +++ b/arch/arm64/kernel/sys_ilp32.c @@ -45,6 +45,15 @@ #define compat_sys_open_by_handle_at sys_open_by_handle_at #define compat_sys_openat sys_openat +asmlinkage long compat_sys_mmap2_wrapper(void); +#define sys_mmap2 compat_sys_mmap2_wrapper + +asmlinkage long compat_sys_fstatfs64_wrapper(void); +#define compat_sys_fstatfs64 compat_sys_fstatfs64_wrapper + +asmlinkage long compat_sys_statfs64_wrapper(void); +#define compat_sys_statfs64 compat_sys_statfs64_wrapper + #include <asm/syscall.h> #undef __SYSCALL -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
