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Subject[PATCH V2 05/19] csky: System Call
Date
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
---
arch/csky/include/asm/syscall.h | 69 +++++++++++++++++++++++++++++++++++++
arch/csky/include/asm/syscalls.h | 14 ++++++++
arch/csky/include/uapi/asm/unistd.h | 63 +++++++++++++++++++++++++++++++++
arch/csky/kernel/syscall.c | 63 +++++++++++++++++++++++++++++++++
arch/csky/kernel/syscall_table.c | 12 +++++++
5 files changed, 221 insertions(+)
create mode 100644 arch/csky/include/asm/syscall.h
create mode 100644 arch/csky/include/asm/syscalls.h
create mode 100644 arch/csky/include/uapi/asm/unistd.h
create mode 100644 arch/csky/kernel/syscall.c
create mode 100644 arch/csky/kernel/syscall_table.c

diff --git a/arch/csky/include/asm/syscall.h b/arch/csky/include/asm/syscall.h
new file mode 100644
index 0000000..8966739
--- /dev/null
+++ b/arch/csky/include/asm/syscall.h
@@ -0,0 +1,69 @@
+#ifndef __ASM_SYSCALL_H
+#define __ASM_SYSCALL_H
+
+#include <linux/sched.h>
+#include <linux/err.h>
+#include <abi/regdef.h>
+
+static inline int
+syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
+{
+ return regs_syscallid(regs);
+}
+
+static inline void
+syscall_rollback(struct task_struct *task, struct pt_regs *regs)
+{
+ regs->a0 = regs->orig_a0;
+}
+
+static inline long
+syscall_get_error(struct task_struct *task, struct pt_regs *regs)
+{
+ unsigned long error = regs->a0;
+
+ return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long
+syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
+{
+ return regs->a0;
+}
+
+static inline void
+syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
+ int error, long val)
+{
+ regs->a0 = (long) error ?: val;
+}
+
+static inline void
+syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
+ unsigned int i, unsigned int n, unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+ if (i == 0) {
+ args[0] = regs->orig_a0;
+ args++;
+ i++;
+ n--;
+ }
+ memcpy(args, &regs->a1 + i * sizeof(regs->a1), n * sizeof(args[0]));
+}
+
+static inline void
+syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
+ unsigned int i, unsigned int n, const unsigned long *args)
+{
+ BUG_ON(i + n > 6);
+ if (i == 0) {
+ regs->orig_a0 = args[0];
+ args++;
+ i++;
+ n--;
+ }
+ memcpy(&regs->a1 + i * sizeof(regs->a1), args, n * sizeof(regs->a0));
+}
+
+#endif /* __ASM_SYSCALL_H */
diff --git a/arch/csky/include/asm/syscalls.h b/arch/csky/include/asm/syscalls.h
new file mode 100644
index 0000000..c478830
--- /dev/null
+++ b/arch/csky/include/asm/syscalls.h
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#ifndef __ASM_CSKY_SYSCALLS_H
+#define __ASM_CSKY_SYSCALLS_H
+
+#include <asm-generic/syscalls.h>
+
+long sys_cacheflush(void __user *, unsigned long, int);
+
+long sys_set_thread_area(unsigned long addr);
+
+long sys_csky_fadvise64_64(int fd, int advice, loff_t offset, loff_t len);
+
+#endif /* __ASM_CSKY_SYSCALLS_H */
diff --git a/arch/csky/include/uapi/asm/unistd.h b/arch/csky/include/uapi/asm/unistd.h
new file mode 100644
index 0000000..0ea9b5a
--- /dev/null
+++ b/arch/csky/include/uapi/asm/unistd.h
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#define __ARCH_WANT_OLD_READDIR
+#define __ARCH_WANT_RENAMEAT
+#define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SYS_ALARM
+#define __ARCH_WANT_SYS_CLONE
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_GETHOSTNAME
+#define __ARCH_WANT_SYS_GETPGRP
+#define __ARCH_WANT_SYS_IPC
+#define __ARCH_WANT_SYS_LLSEEK
+#define __ARCH_WANT_SYS_NICE
+#define __ARCH_WANT_SYS_OLD_GETRLIMIT
+#define __ARCH_WANT_SYS_OLDUMOUNT
+#define __ARCH_WANT_SYS_PAUSE
+#define __ARCH_WANT_SYS_SIGNAL
+#define __ARCH_WANT_SYS_SIGPENDING
+#define __ARCH_WANT_SYS_SIGPROCMASK
+#define __ARCH_WANT_SYS_SOCKETCALL
+#define __ARCH_WANT_SYS_TIME
+#define __ARCH_WANT_SYS_UTIME
+#define __ARCH_WANT_SYS_VFORK
+#define __ARCH_WANT_SYS_WAITPID
+
+#include <asm-generic/unistd.h>
+
+/*
+ * other define
+ */
+#define __NR_set_thread_area (__NR_arch_specific_syscall + 0)
+__SYSCALL(__NR_set_thread_area, sys_set_thread_area)
+#define __NR_ipc (__NR_arch_specific_syscall + 1)
+__SYSCALL(__NR_ipc, sys_ipc)
+#define __NR_socketcall (__NR_arch_specific_syscall + 2)
+__SYSCALL(__NR_socketcall, sys_socketcall)
+#define __NR_ugetrlimit (__NR_arch_specific_syscall + 3)
+__SYSCALL(__NR_ugetrlimit, sys_getrlimit)
+#define __NR_cacheflush (__NR_arch_specific_syscall + 4)
+__SYSCALL(__NR_cacheflush, sys_cacheflush)
+#define __NR_sysfs (__NR_arch_specific_syscall + 5)
+__SYSCALL(__NR_sysfs, sys_sysfs)
+
+__SYSCALL(__NR_fadvise64_64, sys_csky_fadvise64_64)
+
+#define __NR_setgroups32 __NR_setgroups
+#define __NR_getgid32 __NR_getgid
+#define __NR_getgroups32 __NR_getgroups
+#define __NR_setuid32 __NR_setuid
+#define __NR_setgid32 __NR_setgid
+#define __NR_getresgid32 __NR_getresgid
+#define __NR_setfsuid32 __NR_setfsuid
+#define __NR_setfsgid32 __NR_setfsgid
+#define __NR_fchown32 __NR_fchown
+#define __NR_geteuid32 __NR_geteuid
+#define __NR_getegid32 __NR_getegid
+#define __NR_getresuid32 __NR_getresuid
+#define __NR_setresuid32 __NR_setresuid
+#define __NR_setresgid32 __NR_setresgid
+#define __NR_setreuid32 __NR_setreuid
+#define __NR_setregid32 __NR_setregid
+#define __NR__llseek __NR_llseek
+
diff --git a/arch/csky/kernel/syscall.c b/arch/csky/kernel/syscall.c
new file mode 100644
index 0000000..f0a1294
--- /dev/null
+++ b/arch/csky/kernel/syscall.c
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#include <linux/syscalls.h>
+
+SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
+{
+ struct thread_info *ti = task_thread_info(current);
+ struct pt_regs *reg = current_pt_regs();
+
+ reg->tls = addr;
+ ti->tp_value = addr;
+
+ return 0;
+}
+
+SYSCALL_DEFINE6(mmap2,
+ unsigned long, addr,
+ unsigned long, len,
+ unsigned long, prot,
+ unsigned long, flags,
+ unsigned long, fd,
+ off_t, offset)
+{
+ if (unlikely(offset & (~PAGE_MASK >> 12)))
+ return -EINVAL;
+ return sys_mmap_pgoff(addr, len, prot, flags, fd,
+ offset >> (PAGE_SHIFT - 12));
+}
+
+struct mmap_arg_struct {
+ unsigned long addr;
+ unsigned long len;
+ unsigned long prot;
+ unsigned long flags;
+ unsigned long fd;
+ unsigned long offset;
+};
+
+SYSCALL_DEFINE1(mmap,
+ struct mmap_arg_struct *, arg)
+{
+ struct mmap_arg_struct a;
+
+ if (copy_from_user(&a, arg, sizeof(a)))
+ return -EINVAL;
+
+ if (unlikely(a.offset & ~PAGE_MASK))
+ return -EINVAL;
+
+ return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, a.offset >> PAGE_SHIFT);
+}
+
+/*
+ * for abiv1 the 64bits args should be even th, So we need mov the advice forward.
+ */
+SYSCALL_DEFINE4(csky_fadvise64_64,
+ int, fd,
+ int, advice,
+ loff_t, offset,
+ loff_t, len)
+{
+ return sys_fadvise64_64(fd, offset, len, advice);
+}
diff --git a/arch/csky/kernel/syscall_table.c b/arch/csky/kernel/syscall_table.c
new file mode 100644
index 0000000..bea8558
--- /dev/null
+++ b/arch/csky/kernel/syscall_table.c
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
+#include <linux/syscalls.h>
+#include <asm/syscalls.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, call) [nr] = (call),
+
+void * const sys_call_table[__NR_syscalls] __page_aligned_data = {
+ [0 ... __NR_syscalls - 1] = sys_ni_syscall,
+#include <asm/unistd.h>
+};
--
2.7.4
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