diff options
| -rw-r--r-- | arch/hexagon/include/asm/syscall.h | 54 | ||||
| -rw-r--r-- | arch/hexagon/include/asm/unistd.h | 36 | ||||
| -rw-r--r-- | arch/hexagon/kernel/syscall.c | 90 | ||||
| -rw-r--r-- | arch/hexagon/kernel/syscalltab.c | 32 |
4 files changed, 212 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/syscall.h b/arch/hexagon/include/asm/syscall.h new file mode 100644 index 000000000000..3e7d61d38d97 --- /dev/null +++ b/arch/hexagon/include/asm/syscall.h @@ -0,0 +1,54 @@ +/* + * Syscall support for the Hexagon architecture + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#ifndef _ASM_HEXAGON_SYSCALL_H +#define _ASM_HEXAGON_SYSCALL_H + +typedef long (*syscall_fn)(unsigned long, unsigned long, + unsigned long, unsigned long, + unsigned long, unsigned long); + +asmlinkage int sys_execve(char __user *ufilename, char __user * __user *argv, + char __user * __user *envp); +asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, + unsigned long parent_tidp, unsigned long child_tidp); + +#define sys_execve sys_execve +#define sys_clone sys_clone + +#include <asm-generic/syscalls.h> + +extern void *sys_call_table[]; + +static inline long syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->r06; +} + +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); + memcpy(args, &(®s->r00)[i], n * sizeof(args[0])); +} +#endif diff --git a/arch/hexagon/include/asm/unistd.h b/arch/hexagon/include/asm/unistd.h new file mode 100644 index 000000000000..4d0ecde3665f --- /dev/null +++ b/arch/hexagon/include/asm/unistd.h @@ -0,0 +1,36 @@ +/* + * Syscall support for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#if !defined(_ASM_HEXAGON_UNISTD_H) || defined(__SYSCALL) +#define _ASM_HEXAGON_UNISTD_H + +/* + * The kernel pulls this unistd.h in three different ways: + * 1. the "normal" way which gets all the __NR defines + * 2. with __SYSCALL defined to produce function declarations + * 3. with __SYSCALL defined to produce syscall table initialization + * See also: syscalltab.c + */ + +#define sys_mmap2 sys_mmap_pgoff + +#include <asm-generic/unistd.h> + +#endif diff --git a/arch/hexagon/kernel/syscall.c b/arch/hexagon/kernel/syscall.c new file mode 100644 index 000000000000..620dd18197a0 --- /dev/null +++ b/arch/hexagon/kernel/syscall.c @@ -0,0 +1,90 @@ +/* + * Hexagon system calls + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <linux/file.h> +#include <linux/fs.h> +#include <linux/linkage.h> +#include <linux/mm.h> +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/syscalls.h> +#include <linux/unistd.h> +#include <asm/mman.h> +#include <asm/registers.h> + +/* + * System calls with architecture-specific wrappers. + * See signal.c for signal-related system call wrappers. + */ + +asmlinkage int sys_execve(char __user *ufilename, + const char __user *const __user *argv, + const char __user *const __user *envp) +{ + struct pt_regs *pregs = current_thread_info()->regs; + char *filename; + int retval; + + filename = getname(ufilename); + retval = PTR_ERR(filename); + if (IS_ERR(filename)) + return retval; + + retval = do_execve(filename, argv, envp, pregs); + putname(filename); + + return retval; +} + +asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, + unsigned long parent_tidp, unsigned long child_tidp) +{ + struct pt_regs *pregs = current_thread_info()->regs; + + if (!newsp) + newsp = pregs->SP; + return do_fork(clone_flags, newsp, pregs, 0, (int __user *)parent_tidp, + (int __user *)child_tidp); +} + +/* + * Do a system call from the kernel, so as to have a proper pt_regs + * and recycle the sys_execvpe infrustructure. + */ +int kernel_execve(const char *filename, + const char *const argv[], const char *const envp[]) +{ + register unsigned long __a0 asm("r0") = (unsigned long) filename; + register unsigned long __a1 asm("r1") = (unsigned long) argv; + register unsigned long __a2 asm("r2") = (unsigned long) envp; + int retval; + + __asm__ volatile( + " R6 = #%4;\n" + " trap0(#1);\n" + " %0 = R0;\n" + : "=r" (retval) + : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve) + ); + + return retval; +} +EXPORT_SYMBOL(kernel_execve); diff --git a/arch/hexagon/kernel/syscalltab.c b/arch/hexagon/kernel/syscalltab.c new file mode 100644 index 000000000000..c550f4177ab8 --- /dev/null +++ b/arch/hexagon/kernel/syscalltab.c @@ -0,0 +1,32 @@ +/* + * System call table for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <linux/syscalls.h> +#include <linux/signal.h> +#include <linux/unistd.h> + +#include <asm/syscall.h> + +#undef __SYSCALL +#define __SYSCALL(nr, call) [nr] = (call), + +void *sys_call_table[__NR_syscalls] = { +#include <asm/unistd.h> +}; |