diff options
| -rw-r--r-- | include/asm-powerpc/ptrace.h | 1 | ||||
| -rw-r--r-- | include/asm-powerpc/syscall.h | 84 |
2 files changed, 85 insertions, 0 deletions
diff --git a/include/asm-powerpc/ptrace.h b/include/asm-powerpc/ptrace.h index 3d6e31024e56..734e0754fb9b 100644 --- a/include/asm-powerpc/ptrace.h +++ b/include/asm-powerpc/ptrace.h @@ -84,6 +84,7 @@ struct pt_regs { #ifndef __ASSEMBLY__ #define instruction_pointer(regs) ((regs)->nip) +#define user_stack_pointer(regs) ((regs)->gpr[1]) #define regs_return_value(regs) ((regs)->gpr[3]) #ifdef CONFIG_SMP diff --git a/include/asm-powerpc/syscall.h b/include/asm-powerpc/syscall.h new file mode 100644 index 000000000000..efa7f0b879f3 --- /dev/null +++ b/include/asm-powerpc/syscall.h @@ -0,0 +1,84 @@ +/* + * Access to user system call parameters and results + * + * Copyright (C) 2008 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License v.2. + * + * See asm-generic/syscall.h for descriptions of what we must do here. + */ + +#ifndef _ASM_SYSCALL_H +#define _ASM_SYSCALL_H 1 + +#include <linux/sched.h> + +static inline long syscall_get_nr(struct task_struct *task, + struct pt_regs *regs) +{ + return TRAP(regs) == 0xc00 ? regs->gpr[0] : -1L; +} + +static inline void syscall_rollback(struct task_struct *task, + struct pt_regs *regs) +{ + regs->gpr[3] = regs->orig_gpr3; +} + +static inline long syscall_get_error(struct task_struct *task, + struct pt_regs *regs) +{ + return (regs->ccr & 0x1000) ? -regs->gpr[3] : 0; +} + +static inline long syscall_get_return_value(struct task_struct *task, + struct pt_regs *regs) +{ + return regs->gpr[3]; +} + +static inline void syscall_set_return_value(struct task_struct *task, + struct pt_regs *regs, + int error, long val) +{ + if (error) { + regs->ccr |= 0x1000L; + regs->gpr[3] = -error; + } else { + regs->ccr &= ~0x1000L; + regs->gpr[3] = 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); +#ifdef CONFIG_PPC64 + if (test_tsk_thread_flag(task, TIF_32BIT)) { + /* + * Zero-extend 32-bit argument values. The high bits are + * garbage ignored by the actual syscall dispatch. + */ + while (n-- > 0) + args[n] = (u32) regs->gpr[3 + i + n]; + return; + } +#endif + memcpy(args, ®s->gpr[3 + i], 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); + memcpy(®s->gpr[3 + i], args, n * sizeof(args[0])); +} + +#endif /* _ASM_SYSCALL_H */ |