Le 25/07/2022 à 08:27, Rohan McLure a écrit : > Forward declare all syscall handler prototypes where a generic prototype > is not provided in either linux/syscalls.h or linux/compat.h in > asm/syscalls.h. This is required for compile-time type-checking for > syscall handlers, which is implemented later in this series. > > 32-bit compatibility syscall handlers are expressed in terms of types in > ppc32.h. Expose this header globally. > > Signed-off-by: Rohan McLure <rmcl...@linux.ibm.com> > --- > V1 -> V2: Explicitly include prototypes. > --- > arch/powerpc/{kernel => include/asm}/ppc32.h | 0
I think a new name would be welcome, for instance syscalls_32.h ? > arch/powerpc/include/asm/syscalls.h | 104 ++++++++++++----- > arch/powerpc/kernel/signal_32.c | 2 +- > arch/powerpc/perf/callchain_32.c | 2 +- > 4 files changed, 76 insertions(+), 32 deletions(-) > > diff --git a/arch/powerpc/kernel/ppc32.h b/arch/powerpc/include/asm/ppc32.h > similarity index 100% > rename from arch/powerpc/kernel/ppc32.h > rename to arch/powerpc/include/asm/ppc32.h > diff --git a/arch/powerpc/include/asm/syscalls.h > b/arch/powerpc/include/asm/syscalls.h > index 025d4b877161..8b2757d7f423 100644 > --- a/arch/powerpc/include/asm/syscalls.h > +++ b/arch/powerpc/include/asm/syscalls.h > @@ -8,49 +8,93 @@ > #include <linux/types.h> > #include <linux/compat.h> > > +#ifdef CONFIG_PPC64 > +#include <asm/ppc32.h> > +#endif > +#include <asm/unistd.h> > +#include <asm/ucontext.h> > + > struct rtas_args; > > -asmlinkage long sys_mmap(unsigned long addr, size_t len, > - unsigned long prot, unsigned long flags, > - unsigned long fd, off_t offset); > -asmlinkage long sys_mmap2(unsigned long addr, size_t len, > - unsigned long prot, unsigned long flags, > - unsigned long fd, unsigned long pgoff); > -asmlinkage long sys_ppc64_personality(unsigned long personality); > +#ifndef CONFIG_ARCH_HAS_SYSCALL_WRAPPER > + > +/* > + * PowerPC architecture-specific syscalls > + */ > + > asmlinkage long sys_rtas(struct rtas_args __user *uargs); > -int sys_ppc_select(int n, fd_set __user *inp, fd_set __user *outp, > - fd_set __user *exp, struct __kernel_old_timeval __user *tvp); > -long sys_ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 > offset_low, > - u32 len_high, u32 len_low); > +asmlinkage long sys_ni_syscall(void); > > +#ifdef CONFIG_PPC64 > +asmlinkage long sys_ppc64_personality(unsigned long personality); > #ifdef CONFIG_COMPAT > -unsigned long compat_sys_mmap2(unsigned long addr, size_t len, > - unsigned long prot, unsigned long flags, > - unsigned long fd, unsigned long pgoff); > +asmlinkage long compat_sys_ppc64_personality(unsigned long personality); > +#endif /* CONFIG_COMPAT */ > +#endif /* CONFIG_PPC64 */ > > -compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, > compat_size_t count, > - u32 reg6, u32 pos1, u32 pos2); > +/* Parameters are reordered for powerpc to avoid padding */ > +asmlinkage long sys_ppc_fadvise64_64(int fd, int advice, > + u32 offset_high, u32 offset_low, > + u32 len_high, u32 len_low); > +asmlinkage long sys_swapcontext(struct ucontext __user *old_ctx, > + struct ucontext __user *new_ctx, long ctx_size); > +asmlinkage long sys_mmap(unsigned long addr, size_t len, > + unsigned long prot, unsigned long flags, > + unsigned long fd, off_t offset); > +asmlinkage long sys_mmap2(unsigned long addr, size_t len, > + unsigned long prot, unsigned long flags, > + unsigned long fd, unsigned long pgoff); > +asmlinkage long sys_switch_endian(void); > > -compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, > compat_size_t count, > - u32 reg6, u32 pos1, u32 pos2); > +#ifdef CONFIG_PPC32 > +asmlinkage long sys_sigreturn(void); > +asmlinkage long sys_debug_setcontext(struct ucontext __user *ctx, int ndbg, > + struct sig_dbg_op __user *dbg); > +#endif > > -compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offset1, u32 > offset2, u32 count); > +asmlinkage long sys_rt_sigreturn(void); > > -int compat_sys_truncate64(const char __user *path, u32 reg4, > - unsigned long len1, unsigned long len2); > +asmlinkage long sys_subpage_prot(unsigned long addr, > + unsigned long len, u32 __user *map); > > -long compat_sys_fallocate(int fd, int mode, u32 offset1, u32 offset2, u32 > len1, u32 len2); > +#ifdef CONFIG_COMPAT > +asmlinkage long compat_sys_swapcontext(struct ucontext32 __user *old_ctx, > + struct ucontext32 __user *new_ctx, > + int ctx_size); > +asmlinkage long compat_sys_old_getrlimit(unsigned int resource, > + struct compat_rlimit __user *rlim); > +asmlinkage long compat_sys_sigreturn(void); > +asmlinkage long compat_sys_rt_sigreturn(void); > > -int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long len1, > - unsigned long len2); > +/* Architecture-specific implementations in sys_ppc32.c */ > > -long compat_sys_ppc32_fadvise64(int fd, u32 unused, u32 offset1, u32 offset2, > - size_t len, int advice); > +asmlinkage long compat_sys_mmap2(unsigned long addr, size_t len, > + unsigned long prot, unsigned long flags, > + unsigned long fd, unsigned long pgoff); > +asmlinkage long compat_sys_ppc_pread64(unsigned int fd, > + char __user *ubuf, compat_size_t count, > + u32 reg6, u32 pos1, u32 pos2); > +asmlinkage long compat_sys_ppc_pwrite64(unsigned int fd, > + const char __user *ubuf, compat_size_t > count, > + u32 reg6, u32 pos1, u32 pos2); > +asmlinkage long compat_sys_ppc_readahead(int fd, u32 r4, > + u32 offset1, u32 offset2, u32 count); > +asmlinkage long compat_sys_ppc_truncate64(const char __user *path, u32 reg4, > + unsigned long len1, unsigned long > len2); > +asmlinkage long compat_sys_ppc_fallocate(int fd, int mode, u32 offset1, u32 > offset2, > + u32 len1, u32 len2); > +asmlinkage long compat_sys_ppc_ftruncate64(unsigned int fd, u32 reg4, > + unsigned long len1, unsigned long > len2); > +asmlinkage long compat_sys_ppc32_fadvise64(int fd, u32 unused, u32 offset1, > u32 offset2, > + size_t len, int advice); > +asmlinkage long compat_sys_ppc_sync_file_range2(int fd, unsigned int flags, > + unsigned int offset1, > + unsigned int offset2, > + unsigned int nbytes1, > + unsigned int nbytes2); > +#endif /* CONFIG_COMPAT */ > > -long compat_sys_sync_file_range2(int fd, unsigned int flags, > - unsigned int offset1, unsigned int offset2, > - unsigned int nbytes1, unsigned int nbytes2); > -#endif > +#endif /* CONFIG_ARCH_HAS_SYSCALL_WRAPPER */ > > #endif /* __KERNEL__ */ > #endif /* __ASM_POWERPC_SYSCALLS_H */ > diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c > index 157a7403e3eb..d45c0d7d0a55 100644 > --- a/arch/powerpc/kernel/signal_32.c > +++ b/arch/powerpc/kernel/signal_32.c > @@ -43,7 +43,7 @@ > #include <asm/tm.h> > #include <asm/asm-prototypes.h> > #ifdef CONFIG_PPC64 > -#include "ppc32.h" > +#include <asm/ppc32.h> > #include <asm/unistd.h> > #else > #include <asm/ucontext.h> > diff --git a/arch/powerpc/perf/callchain_32.c > b/arch/powerpc/perf/callchain_32.c > index b83c47b7947f..7e94c32b8398 100644 > --- a/arch/powerpc/perf/callchain_32.c > +++ b/arch/powerpc/perf/callchain_32.c > @@ -19,7 +19,7 @@ > #include "callchain.h" > > #ifdef CONFIG_PPC64 > -#include "../kernel/ppc32.h" > +#include <asm/ppc32.h> > #else /* CONFIG_PPC64 */ > > #define __SIGNAL_FRAMESIZE32 __SIGNAL_FRAMESIZE