syscall_desc.hh (11794:97eebddaae84) syscall_desc.hh (11851:824055fe6b30)
1/*
2 * Copyright (c) 2012-2013, 2015 ARM Limited
3 * Copyright (c) 2015-2016 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating

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43 * Brandon Potter
44 */
45
46#ifndef __SIM_SYSCALL_DESC_HH__
47#define __SIM_SYSCALL_DESC_HH__
48
49#include <string>
50
1/*
2 * Copyright (c) 2012-2013, 2015 ARM Limited
3 * Copyright (c) 2015-2016 Advanced Micro Devices, Inc.
4 * All rights reserved
5 *
6 * The license below extends only to copyright in the software and shall
7 * not be construed as granting a license to any other intellectual
8 * property including but not limited to intellectual property relating

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43 * Brandon Potter
44 */
45
46#ifndef __SIM_SYSCALL_DESC_HH__
47#define __SIM_SYSCALL_DESC_HH__
48
49#include <string>
50
51class LiveProcess;
51class Process;
52class SyscallReturn;
53class ThreadContext;
54
55/**
56 * This class provides the wrapper interface for the system call
57 * implementations which are defined in the sim/syscall_emul files and
58 * bound to the ISAs in the architecture specific code
59 * (i.e. arch/X86/linux/process.cc).
60 */
61class SyscallDesc {
62 public:
63 /** Typedef the function pointer here to clean up code below */
64 typedef SyscallReturn (*SyscallExecutor)(SyscallDesc*, int num,
52class SyscallReturn;
53class ThreadContext;
54
55/**
56 * This class provides the wrapper interface for the system call
57 * implementations which are defined in the sim/syscall_emul files and
58 * bound to the ISAs in the architecture specific code
59 * (i.e. arch/X86/linux/process.cc).
60 */
61class SyscallDesc {
62 public:
63 /** Typedef the function pointer here to clean up code below */
64 typedef SyscallReturn (*SyscallExecutor)(SyscallDesc*, int num,
65 LiveProcess*, ThreadContext*);
65 Process*, ThreadContext*);
66
67 SyscallDesc(const char *name, SyscallExecutor sys_exec, int flags = 0)
68 : _name(name), executor(sys_exec), _flags(flags), _warned(false)
69 {
70 }
71
72 /** Provide a mechanism to specify behavior for abnormal system calls */
73 enum Flags {

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86 /**
87 * Interface for invoking the system call funcion pointer. Note that
88 * this acts as a gateway for all system calls and serves a good point
89 * to add filters for behaviors or apply checks for all system calls.
90 * @param callnum Number associated with call (by operating system)
91 * @param proc Handle for the owning Process to pass information
92 * @param tc Handle for owning ThreadContext to pass information
93 */
66
67 SyscallDesc(const char *name, SyscallExecutor sys_exec, int flags = 0)
68 : _name(name), executor(sys_exec), _flags(flags), _warned(false)
69 {
70 }
71
72 /** Provide a mechanism to specify behavior for abnormal system calls */
73 enum Flags {

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86 /**
87 * Interface for invoking the system call funcion pointer. Note that
88 * this acts as a gateway for all system calls and serves a good point
89 * to add filters for behaviors or apply checks for all system calls.
90 * @param callnum Number associated with call (by operating system)
91 * @param proc Handle for the owning Process to pass information
92 * @param tc Handle for owning ThreadContext to pass information
93 */
94 void doSyscall(int callnum, LiveProcess *proc, ThreadContext *tc);
94 void doSyscall(int callnum, Process *proc, ThreadContext *tc);
95
96 /**
97 * Return false if WarnOnce is set and a warning has already been issued.
98 * Otherwise, return true. Updates state as a side effect to help
99 * keep track of issued warnings.
100 */
101 bool needWarning();
102

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96 /**
97 * Return false if WarnOnce is set and a warning has already been issued.
98 * Otherwise, return true. Updates state as a side effect to help
99 * keep track of issued warnings.
100 */
101 bool needWarning();
102

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