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Diffstat (limited to 'arch/powerpc/kernel/sys_ppc32.c')
-rw-r--r-- | arch/powerpc/kernel/sys_ppc32.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c new file mode 100644 index 0000000000..d451a82292 --- /dev/null +++ b/arch/powerpc/kernel/sys_ppc32.c @@ -0,0 +1,135 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * sys_ppc32.c: 32-bit system calls with complex calling conventions. + * + * Copyright (C) 2001 IBM + * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) + * + * 32-bit system calls with 64-bit arguments pass those in register pairs. + * This must be specially dealt with on 64-bit kernels. The compat_arg_u64_dual + * in generic compat syscalls is not always usable because the register + * pairing is constrained depending on preceding arguments. + * + * An analogous problem exists on 32-bit kernels with ARCH_HAS_SYSCALL_WRAPPER, + * the defined system call functions take the pt_regs as an argument, and there + * is a mapping macro which maps registers to arguments + * (SC_POWERPC_REGS_TO_ARGS) which also does not deal with these 64-bit + * arguments. + * + * This file contains these system calls. + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/mm.h> +#include <linux/file.h> +#include <linux/signal.h> +#include <linux/resource.h> +#include <linux/times.h> +#include <linux/smp.h> +#include <linux/sem.h> +#include <linux/msg.h> +#include <linux/shm.h> +#include <linux/poll.h> +#include <linux/personality.h> +#include <linux/stat.h> +#include <linux/in.h> +#include <linux/syscalls.h> +#include <linux/unistd.h> +#include <linux/sysctl.h> +#include <linux/binfmts.h> +#include <linux/security.h> +#include <linux/compat.h> +#include <linux/ptrace.h> +#include <linux/elf.h> +#include <linux/ipc.h> +#include <linux/slab.h> + +#include <asm/ptrace.h> +#include <asm/types.h> +#include <linux/uaccess.h> +#include <asm/unistd.h> +#include <asm/time.h> +#include <asm/mmu_context.h> +#include <asm/ppc-pci.h> +#include <asm/syscalls.h> +#include <asm/switch_to.h> + +#ifdef CONFIG_PPC32 +#define PPC32_SYSCALL_DEFINE4 SYSCALL_DEFINE4 +#define PPC32_SYSCALL_DEFINE5 SYSCALL_DEFINE5 +#define PPC32_SYSCALL_DEFINE6 SYSCALL_DEFINE6 +#else +#define PPC32_SYSCALL_DEFINE4 COMPAT_SYSCALL_DEFINE4 +#define PPC32_SYSCALL_DEFINE5 COMPAT_SYSCALL_DEFINE5 +#define PPC32_SYSCALL_DEFINE6 COMPAT_SYSCALL_DEFINE6 +#endif + +PPC32_SYSCALL_DEFINE6(ppc_pread64, + unsigned int, fd, + char __user *, ubuf, compat_size_t, count, + u32, reg6, u32, pos1, u32, pos2) +{ + return ksys_pread64(fd, ubuf, count, merge_64(pos1, pos2)); +} + +PPC32_SYSCALL_DEFINE6(ppc_pwrite64, + unsigned int, fd, + const char __user *, ubuf, compat_size_t, count, + u32, reg6, u32, pos1, u32, pos2) +{ + return ksys_pwrite64(fd, ubuf, count, merge_64(pos1, pos2)); +} + +PPC32_SYSCALL_DEFINE5(ppc_readahead, + int, fd, u32, r4, + u32, offset1, u32, offset2, u32, count) +{ + return ksys_readahead(fd, merge_64(offset1, offset2), count); +} + +PPC32_SYSCALL_DEFINE4(ppc_truncate64, + const char __user *, path, u32, reg4, + unsigned long, len1, unsigned long, len2) +{ + return ksys_truncate(path, merge_64(len1, len2)); +} + +PPC32_SYSCALL_DEFINE4(ppc_ftruncate64, + unsigned int, fd, u32, reg4, + unsigned long, len1, unsigned long, len2) +{ + return ksys_ftruncate(fd, merge_64(len1, len2)); +} + +PPC32_SYSCALL_DEFINE6(ppc32_fadvise64, + int, fd, u32, unused, u32, offset1, u32, offset2, + size_t, len, int, advice) +{ + return ksys_fadvise64_64(fd, merge_64(offset1, offset2), len, + advice); +} + +PPC32_SYSCALL_DEFINE6(ppc_sync_file_range2, + int, fd, unsigned int, flags, + unsigned int, offset1, unsigned int, offset2, + unsigned int, nbytes1, unsigned int, nbytes2) +{ + loff_t offset = merge_64(offset1, offset2); + loff_t nbytes = merge_64(nbytes1, nbytes2); + + return ksys_sync_file_range(fd, offset, nbytes, flags); +} + +#ifdef CONFIG_PPC32 +SYSCALL_DEFINE6(ppc_fallocate, + int, fd, int, mode, + u32, offset1, u32, offset2, u32, len1, u32, len2) +{ + return ksys_fallocate(fd, mode, + merge_64(offset1, offset2), + merge_64(len1, len2)); +} +#endif |