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syscall_emul: implement fallocate

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This commit is contained in:
Brandon Potter 2016-12-15 13:16:25 -05:00
parent 68e9c0e73b
commit cc84eb813c
3 changed files with 26 additions and 1 deletions
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2
src/arch/x86/linux/process.cc
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@ -503,7 +503,7 @@ static SyscallDesc syscallDescs64[] = {
/* 282 */ SyscallDesc("signalfd", unimplementedFunc),
/* 283 */ SyscallDesc("timerfd_create", unimplementedFunc),
/* 284 */ SyscallDesc("eventfd", unimplementedFunc),
/* 285 */ SyscallDesc("fallocate", unimplementedFunc),
/* 285 */ SyscallDesc("fallocate", fallocateFunc),
/* 286 */ SyscallDesc("timerfd_settime", unimplementedFunc),
/* 287 */ SyscallDesc("timerfd_gettime", unimplementedFunc),
/* 288 */ SyscallDesc("accept4", unimplementedFunc),

21
src/sim/syscall_emul.cc
View file

@ -934,6 +934,27 @@ cloneFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
}
}
SyscallReturn
fallocateFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
ThreadContext *tc)
{
int index = 0;
int tgt_fd = process->getSyscallArg(tc, index);
int mode = process->getSyscallArg(tc, index);
off_t offset = process->getSyscallArg(tc, index);
off_t len = process->getSyscallArg(tc, index);
int sim_fd = process->getSimFD(tgt_fd);
if (sim_fd < 0)
return -EBADF;
int result = fallocate(sim_fd, mode, offset, len);
if (result < 0)
return -errno;
return 0;
}
SyscallReturn
accessFunc(SyscallDesc *desc, int callnum, LiveProcess *p, ThreadContext *tc,
int index)

4
src/sim/syscall_emul.hh
View file

@ -157,6 +157,10 @@ SyscallReturn unimplementedFunc(SyscallDesc *desc, int num,
SyscallReturn ignoreFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
// Target fallocateFunc() handler.
SyscallReturn fallocateFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);
/// Target exit() handler: terminate current context.
SyscallReturn exitFunc(SyscallDesc *desc, int num,
LiveProcess *p, ThreadContext *tc);