author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Access to user system call parameters and results |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* Copyright (C) 2008 Red Hat, Inc. All rights reserved. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* This copyrighted material is made available to anyone wishing to use, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* modify, copy, or redistribute it subject to the terms and conditions |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* of the GNU General Public License v.2. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* This file is a stub providing documentation for what functions |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* asm-ARCH/syscall.h files need to define. Most arch definitions |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* will be simple inlines. |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* All of these functions expect to be called with no locks, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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* and only when the caller is sure that the task of interest |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* cannot return to user mode while we are looking at it. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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#ifndef _ASM_SYSCALL_H |
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Port of Linux 2.6.28 for use with network simulation cradle.
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#define _ASM_SYSCALL_H 1 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct task_struct; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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struct pt_regs; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* syscall_get_nr - find what system call a task is executing |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @task: task of interest, must be blocked |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @regs: task_pt_regs() of @task |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* If @task is executing a system call or is at system call |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* tracing about to attempt one, returns the system call number. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* If @task is not executing a system call, i.e. it's blocked |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* inside the kernel for a fault or signal, returns -1. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* It's only valid to call this when @task is known to be blocked. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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long syscall_get_nr(struct task_struct *task, struct pt_regs *regs); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* syscall_rollback - roll back registers after an aborted system call |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @task: task of interest, must be in system call exit tracing |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* @regs: task_pt_regs() of @task |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* It's only valid to call this when @task is stopped for system |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* call exit tracing (due to TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT), |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* after tracehook_report_syscall_entry() returned nonzero to prevent |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* the system call from taking place. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* This rolls back the register state in @regs so it's as if the |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* system call instruction was a no-op. The registers containing |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* the system call number and arguments are as they were before the |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* system call instruction. This may not be the same as what the |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* register state looked like at system call entry tracing. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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void syscall_rollback(struct task_struct *task, struct pt_regs *regs); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* syscall_get_error - check result of traced system call |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @task: task of interest, must be blocked |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @regs: task_pt_regs() of @task |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Returns 0 if the system call succeeded, or -ERRORCODE if it failed. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* It's only valid to call this when @task is stopped for tracing on exit |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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long syscall_get_error(struct task_struct *task, struct pt_regs *regs); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* syscall_get_return_value - get the return value of a traced system call |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @task: task of interest, must be blocked |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @regs: task_pt_regs() of @task |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Returns the return value of the successful system call. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* This value is meaningless if syscall_get_error() returned nonzero. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* It's only valid to call this when @task is stopped for tracing on exit |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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* from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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Port of Linux 2.6.28 for use with network simulation cradle.
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* syscall_set_return_value - change the return value of a traced system call |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @task: task of interest, must be blocked |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @regs: task_pt_regs() of @task |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @error: negative error code, or zero to indicate success |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @val: user return value if @error is zero |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* This changes the results of the system call that user mode will see. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* If @error is zero, the user sees a successful system call with a |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* return value of @val. If @error is nonzero, it's a negated errno |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* code; the user sees a failed system call with this errno code. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* It's only valid to call this when @task is stopped for tracing on exit |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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* from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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*/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, |
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Port of Linux 2.6.28 for use with network simulation cradle.
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int error, long val); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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|
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/** |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* syscall_get_arguments - extract system call parameter values |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @task: task of interest, must be blocked |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @regs: task_pt_regs() of @task |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @i: argument index [0,5] |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @n: number of arguments; n+i must be [1,6]. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* @args: array filled with argument values |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* Fetches @n arguments to the system call starting with the @i'th argument |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* (from 0 through 5). Argument @i is stored in @args[0], and so on. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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* An arch inline version is probably optimal when @i and @n are constants. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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111 |
* |
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* It's only valid to call this when @task is stopped for tracing on |
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* entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. |
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* It's invalid to call this with @i + @n > 6; we only support system calls |
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* taking up to 6 arguments. |
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*/ |
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void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, |
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unsigned int i, unsigned int n, unsigned long *args); |
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|
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/** |
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* syscall_set_arguments - change system call parameter value |
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* @task: task of interest, must be in system call entry tracing |
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* @regs: task_pt_regs() of @task |
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* @i: argument index [0,5] |
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* @n: number of arguments; n+i must be [1,6]. |
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* @args: array of argument values to store |
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* |
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* Changes @n arguments to the system call starting with the @i'th argument. |
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* Argument @i gets value @args[0], and so on. |
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* An arch inline version is probably optimal when @i and @n are constants. |
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* |
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* It's only valid to call this when @task is stopped for tracing on |
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* entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. |
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* It's invalid to call this with @i + @n > 6; we only support system calls |
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* taking up to 6 arguments. |
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*/ |
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void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, |
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unsigned int i, unsigned int n, |
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const unsigned long *args); |
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|
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#endif /* _ASM_SYSCALL_H */ |