syscall_desc.cc (13557:fc33e6048b25) syscall_desc.cc (13995:5d459168a680)
1/*
2 * Copyright (c) 2016 Advanced Micro Devices, Inc.
3 * Copyright (c) 2003-2005 The Regents of The University of Michigan
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright

--- 32 unchanged lines hidden (view full) ---

41#include "cpu/base.hh"
42#include "cpu/thread_context.hh"
43#include "sim/faults.hh"
44#include "sim/process.hh"
45#include "sim/syscall_debug_macros.hh"
46#include "sim/syscall_return.hh"
47
48void
1/*
2 * Copyright (c) 2016 Advanced Micro Devices, Inc.
3 * Copyright (c) 2003-2005 The Regents of The University of Michigan
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright

--- 32 unchanged lines hidden (view full) ---

41#include "cpu/base.hh"
42#include "cpu/thread_context.hh"
43#include "sim/faults.hh"
44#include "sim/process.hh"
45#include "sim/syscall_debug_macros.hh"
46#include "sim/syscall_return.hh"
47
48void
49SyscallDesc::doSyscall(int callnum, Process *process, ThreadContext *tc,
50 Fault *fault)
49SyscallDesc::doSyscall(int callnum, ThreadContext *tc, Fault *fault)
51{
52 RegVal arg[6] M5_VAR_USED;
50{
51 RegVal arg[6] M5_VAR_USED;
52 auto process = tc->getProcessPtr();
53
54 /**
55 * Step through the first six parameters for the system call and
56 * retrieve their values. Note that index is incremented as a
57 * side-effect of the getSyscallArg method.
58 */
59 int index = 0;
60 for (int i = 0; i < 6; i++)
61 arg[i] = process->getSyscallArg(tc, index);
62
63 /**
64 * Linux supports up to six system call arguments through registers
65 * so we want to print all six. Check to the relevant man page to
66 * verify how many are actually used by a given system call.
67 */
68 DPRINTF_SYSCALL(Base, "%s called w/arguments %d, %d, %d, %d, %d, %d\n",
69 _name, arg[0], arg[1], arg[2], arg[3], arg[4], arg[5]);
70
71 /** Invoke the system call */
53
54 /**
55 * Step through the first six parameters for the system call and
56 * retrieve their values. Note that index is incremented as a
57 * side-effect of the getSyscallArg method.
58 */
59 int index = 0;
60 for (int i = 0; i < 6; i++)
61 arg[i] = process->getSyscallArg(tc, index);
62
63 /**
64 * Linux supports up to six system call arguments through registers
65 * so we want to print all six. Check to the relevant man page to
66 * verify how many are actually used by a given system call.
67 */
68 DPRINTF_SYSCALL(Base, "%s called w/arguments %d, %d, %d, %d, %d, %d\n",
69 _name, arg[0], arg[1], arg[2], arg[3], arg[4], arg[5]);
70
71 /** Invoke the system call */
72 SyscallReturn retval = (*executor)(this, callnum, process, tc);
72 SyscallReturn retval = (*executor)(this, callnum, tc);
73
74 /**
75 * If the system call needs to be restarted, most likely due to
76 * blocking behavior, warn that the system call will retry;
77 * alternatively, print the return value.
78 */
79 if (retval.needsRetry()) {
80 *fault = std::make_shared<SyscallRetryFault>();

--- 15 unchanged lines hidden --- 		73
74 /**
75 * If the system call needs to be restarted, most likely due to
76 * blocking behavior, warn that the system call will retry;
77 * alternatively, print the return value.
78 */
79 if (retval.needsRetry()) {
80 *fault = std::make_shared<SyscallRetryFault>();

--- 15 unchanged lines hidden ---