syscall_emul.cc (11379:bfe4c2a8ad36) syscall_emul.cc (11380:3370547fa302)
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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37#include <string>
38
39#include "arch/utility.hh"
40#include "base/chunk_generator.hh"
41#include "base/trace.hh"
42#include "config/the_isa.hh"
43#include "cpu/base.hh"
44#include "cpu/thread_context.hh"
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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37#include <string>
38
39#include "arch/utility.hh"
40#include "base/chunk_generator.hh"
41#include "base/trace.hh"
42#include "config/the_isa.hh"
43#include "cpu/base.hh"
44#include "cpu/thread_context.hh"
45#include "debug/SyscallBase.hh"
45#include "debug/SyscallVerbose.hh"
46#include "mem/page_table.hh"
47#include "sim/process.hh"
48#include "sim/sim_exit.hh"
49#include "sim/syscall_emul.hh"
50#include "sim/system.hh"
51
52using namespace std;
53using namespace TheISA;
54
55void
56SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
57{
46#include "debug/SyscallVerbose.hh"
47#include "mem/page_table.hh"
48#include "sim/process.hh"
49#include "sim/sim_exit.hh"
50#include "sim/syscall_emul.hh"
51#include "sim/system.hh"
52
53using namespace std;
54using namespace TheISA;
55
56void
57SyscallDesc::doSyscall(int callnum, LiveProcess *process, ThreadContext *tc)
58{
58 if (DTRACE(SyscallVerbose)) {
59 if (DTRACE(SyscallBase)) {
59 int index = 0;
60 int index = 0;
60 IntReg arg[4] M5_VAR_USED;
61 IntReg arg[6] M5_VAR_USED;
61
62 // we can't just put the calls to getSyscallArg() in the
63 // DPRINTF arg list, because C++ doesn't guarantee their order
62
63 // we can't just put the calls to getSyscallArg() in the
64 // DPRINTF arg list, because C++ doesn't guarantee their order
64 for (int i = 0; i < 4; ++i)
65 for (int i = 0; i < 6; ++i)
65 arg[i] = process->getSyscallArg(tc, index);
66
66 arg[i] = process->getSyscallArg(tc, index);
67
67 DPRINTFNR("%d: %s: syscall %s called w/arguments %d,%d,%d,%d\n",
68 curTick(), tc->getCpuPtr()->name(), name,
69 arg[0], arg[1], arg[2], arg[3]);
68 // Linux supports up to six system call arguments through registers
69 // so we want to print all six. Check to the relevant man page to
70 // verify how many are actually used by a given system call.
71 DPRINTF_SYSCALL(Base,
72 "%s called w/arguments %d, %d, %d, %d, %d, %d\n",
73 name, arg[0], arg[1], arg[2], arg[3], arg[4],
74 arg[5]);
70 }
71
72 SyscallReturn retval = (*funcPtr)(this, callnum, process, tc);
73
74 if (retval.needsRetry()) {
75 }
76
77 SyscallReturn retval = (*funcPtr)(this, callnum, process, tc);
78
79 if (retval.needsRetry()) {
75 DPRINTFS(SyscallVerbose, tc->getCpuPtr(), "syscall %s needs retry\n",
76 name);
80 DPRINTF_SYSCALL(Base, "%s needs retry\n", name);
77 } else {
81 } else {
78 DPRINTFS(SyscallVerbose, tc->getCpuPtr(), "syscall %s returns %d\n",
79 name, retval.encodedValue());
82 DPRINTF_SYSCALL(Base, "%s returns %d\n", name,
83 retval.encodedValue());
80 }
81
82 if (!(flags & SyscallDesc::SuppressReturnValue) && !retval.needsRetry())
83 process->setSyscallReturn(tc, retval);
84}
85
86
87SyscallReturn

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196 size_needed = PageBytes - size_needed;
197 tp.memsetBlob(next_page, zero, size_needed);
198 }
199 }
200 }
201 }
202
203 p->brk_point = new_brk;
84 }
85
86 if (!(flags & SyscallDesc::SuppressReturnValue) && !retval.needsRetry())
87 process->setSyscallReturn(tc, retval);
88}
89
90
91SyscallReturn

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200 size_needed = PageBytes - size_needed;
201 tp.memsetBlob(next_page, zero, size_needed);
202 }
203 }
204 }
205 }
206
207 p->brk_point = new_brk;
204 DPRINTF(SyscallVerbose, "Break Point changed to: %#X\n", p->brk_point);
208 DPRINTF_SYSCALL(Verbose, "brk: break point changed to: %#X\n",
209 p->brk_point);
205 return p->brk_point;
206}
207
208
209SyscallReturn
210closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
211{
212 int index = 0;

--- 740 unchanged lines hidden --- 		210 return p->brk_point;
211}
212
213
214SyscallReturn
215closeFunc(SyscallDesc *desc, int num, LiveProcess *p, ThreadContext *tc)
216{
217 int index = 0;

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