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9474689020
When using syscall wrappers the __SYSCALL_DEFINEx() and related macros
add a "__powerpc_" prefix to all syscall entry points.
So for example sys_mmap becomes __powerpc_sys_mmap.
This risks breaking workflows and tools that expect the old naming
scheme. At a minimum setting a breakpoint on eg. sys_mmap with gdb no
longer works.
There seems to be no compelling reason to add the "__powerpc_" prefix,
other than that it follows what some other arches do (x86, arm64, s390).
But unlike other arches powerpc doesn't always enable syscall wrappers,
so the syscall entry points can change name depending on CONFIG options.
For those reasons drop the "__powerpc_" prefix, reverting to the
existing naming.
Doing so reveals two prototypes in signal.h that have the incorrect type
when syscall wrappers are enabled. There are already prototypes for both
functions in syscalls.h, so drop the ones from signal.h.
Fixes: 7e92e01b72 ("powerpc: Provide syscall wrapper")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221006135940.1223988-1-mpe@ellerman.id.au
210 lines
6.6 KiB
C
210 lines
6.6 KiB
C
/*
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* Copyright (c) 2007 Benjamin Herrenschmidt, IBM Corporation
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* Extracted from signal_32.c and signal_64.c
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file README.legal in the main directory of
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* this archive for more details.
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*/
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#ifndef _POWERPC_ARCH_SIGNAL_H
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#define _POWERPC_ARCH_SIGNAL_H
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void __user *get_sigframe(struct ksignal *ksig, struct task_struct *tsk,
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size_t frame_size, int is_32);
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extern int handle_signal32(struct ksignal *ksig, sigset_t *oldset,
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struct task_struct *tsk);
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extern int handle_rt_signal32(struct ksignal *ksig, sigset_t *oldset,
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struct task_struct *tsk);
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static inline int __get_user_sigset(sigset_t *dst, const sigset_t __user *src)
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{
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BUILD_BUG_ON(sizeof(sigset_t) != sizeof(u64));
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return __get_user(dst->sig[0], (u64 __user *)&src->sig[0]);
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}
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#define unsafe_get_user_sigset(dst, src, label) do { \
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sigset_t *__dst = dst; \
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const sigset_t __user *__src = src; \
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int i; \
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\
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for (i = 0; i < _NSIG_WORDS; i++) \
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unsafe_get_user(__dst->sig[i], &__src->sig[i], label); \
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} while (0)
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#ifdef CONFIG_VSX
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extern unsigned long copy_vsx_to_user(void __user *to,
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struct task_struct *task);
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extern unsigned long copy_ckvsx_to_user(void __user *to,
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struct task_struct *task);
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extern unsigned long copy_vsx_from_user(struct task_struct *task,
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void __user *from);
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extern unsigned long copy_ckvsx_from_user(struct task_struct *task,
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void __user *from);
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unsigned long copy_fpr_to_user(void __user *to, struct task_struct *task);
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unsigned long copy_ckfpr_to_user(void __user *to, struct task_struct *task);
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unsigned long copy_fpr_from_user(struct task_struct *task, void __user *from);
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unsigned long copy_ckfpr_from_user(struct task_struct *task, void __user *from);
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#define unsafe_copy_fpr_to_user(to, task, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)to; \
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int i; \
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\
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for (i = 0; i < ELF_NFPREG - 1 ; i++) \
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unsafe_put_user(__t->thread.TS_FPR(i), &buf[i], label); \
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unsafe_put_user(__t->thread.fp_state.fpscr, &buf[i], label); \
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} while (0)
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#define unsafe_copy_vsx_to_user(to, task, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)to; \
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int i; \
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\
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for (i = 0; i < ELF_NVSRHALFREG ; i++) \
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unsafe_put_user(__t->thread.fp_state.fpr[i][TS_VSRLOWOFFSET], \
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&buf[i], label);\
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} while (0)
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#define unsafe_copy_fpr_from_user(task, from, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)from; \
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int i; \
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\
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for (i = 0; i < ELF_NFPREG - 1; i++) \
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unsafe_get_user(__t->thread.TS_FPR(i), &buf[i], label); \
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unsafe_get_user(__t->thread.fp_state.fpscr, &buf[i], label); \
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} while (0)
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#define unsafe_copy_vsx_from_user(task, from, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)from; \
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int i; \
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\
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for (i = 0; i < ELF_NVSRHALFREG ; i++) \
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unsafe_get_user(__t->thread.fp_state.fpr[i][TS_VSRLOWOFFSET], \
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&buf[i], label); \
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} while (0)
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#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
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#define unsafe_copy_ckfpr_to_user(to, task, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)to; \
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int i; \
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\
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for (i = 0; i < ELF_NFPREG - 1 ; i++) \
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unsafe_put_user(__t->thread.TS_CKFPR(i), &buf[i], label);\
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unsafe_put_user(__t->thread.ckfp_state.fpscr, &buf[i], label); \
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} while (0)
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#define unsafe_copy_ckvsx_to_user(to, task, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)to; \
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int i; \
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\
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for (i = 0; i < ELF_NVSRHALFREG ; i++) \
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unsafe_put_user(__t->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET], \
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&buf[i], label);\
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} while (0)
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#define unsafe_copy_ckfpr_from_user(task, from, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)from; \
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int i; \
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\
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for (i = 0; i < ELF_NFPREG - 1 ; i++) \
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unsafe_get_user(__t->thread.TS_CKFPR(i), &buf[i], label);\
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unsafe_get_user(__t->thread.ckfp_state.fpscr, &buf[i], failed); \
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} while (0)
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#define unsafe_copy_ckvsx_from_user(task, from, label) do { \
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struct task_struct *__t = task; \
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u64 __user *buf = (u64 __user *)from; \
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int i; \
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\
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for (i = 0; i < ELF_NVSRHALFREG ; i++) \
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unsafe_get_user(__t->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET], \
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&buf[i], label); \
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} while (0)
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#endif
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#elif defined(CONFIG_PPC_FPU_REGS)
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#define unsafe_copy_fpr_to_user(to, task, label) \
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unsafe_copy_to_user(to, (task)->thread.fp_state.fpr, \
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ELF_NFPREG * sizeof(double), label)
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#define unsafe_copy_fpr_from_user(task, from, label) \
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unsafe_copy_from_user((task)->thread.fp_state.fpr, from, \
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ELF_NFPREG * sizeof(double), label)
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static inline unsigned long
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copy_fpr_to_user(void __user *to, struct task_struct *task)
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{
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return __copy_to_user(to, task->thread.fp_state.fpr,
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ELF_NFPREG * sizeof(double));
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}
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static inline unsigned long
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copy_fpr_from_user(struct task_struct *task, void __user *from)
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{
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return __copy_from_user(task->thread.fp_state.fpr, from,
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ELF_NFPREG * sizeof(double));
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}
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#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
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#define unsafe_copy_ckfpr_to_user(to, task, label) \
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unsafe_copy_to_user(to, (task)->thread.ckfp_state.fpr, \
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ELF_NFPREG * sizeof(double), label)
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inline unsigned long copy_ckfpr_to_user(void __user *to, struct task_struct *task)
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{
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return __copy_to_user(to, task->thread.ckfp_state.fpr,
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ELF_NFPREG * sizeof(double));
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}
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static inline unsigned long
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copy_ckfpr_from_user(struct task_struct *task, void __user *from)
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{
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return __copy_from_user(task->thread.ckfp_state.fpr, from,
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ELF_NFPREG * sizeof(double));
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}
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#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
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#else
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#define unsafe_copy_fpr_to_user(to, task, label) do { if (0) goto label;} while (0)
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#define unsafe_copy_fpr_from_user(task, from, label) do { if (0) goto label;} while (0)
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static inline unsigned long
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copy_fpr_to_user(void __user *to, struct task_struct *task)
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{
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return 0;
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}
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static inline unsigned long
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copy_fpr_from_user(struct task_struct *task, void __user *from)
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{
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return 0;
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}
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#endif
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#ifdef CONFIG_PPC64
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extern int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
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struct task_struct *tsk);
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#else /* CONFIG_PPC64 */
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static inline int handle_rt_signal64(struct ksignal *ksig, sigset_t *set,
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struct task_struct *tsk)
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{
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return -EFAULT;
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}
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#endif /* !defined(CONFIG_PPC64) */
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void signal_fault(struct task_struct *tsk, struct pt_regs *regs,
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const char *where, void __user *ptr);
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#endif /* _POWERPC_ARCH_SIGNAL_H */
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