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syscall_emul: add support for x86 statfs system calls

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This commit is contained in:
Brandon Potter 2016-12-15 13:16:03 -05:00
parent 4ff1b165d0
commit 68e9c0e73b
3 changed files with 49 additions and 3 deletions
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18
src/arch/x86/linux/linux.hh
View file

@ -67,6 +67,24 @@ class X86Linux64 : public Linux
int64_t unused0[3];
} tgt_stat64;
typedef struct {
long val[2];
} tgt_fsid;
typedef struct {
long f_type;
long f_bsize;
long f_blocks;
long f_bfree;
long f_bavail;
long f_files;
long f_ffree;
tgt_fsid f_fsid;
long f_namelen;
long f_frsize;
long f_spare[5];
} tgt_statfs;
static const int TGT_SIGHUP = 0x000001;
static const int TGT_SIGINT = 0x000002;
static const int TGT_SIGQUIT = 0x000003;

2
src/arch/x86/linux/process.cc
View file

@ -355,7 +355,7 @@ static SyscallDesc syscallDescs64[] = {
/* 134 */ SyscallDesc("uselib", unimplementedFunc),
/* 135 */ SyscallDesc("personality", unimplementedFunc),
/* 136 */ SyscallDesc("ustat", unimplementedFunc),
/* 137 */ SyscallDesc("statfs", unimplementedFunc),
/* 137 */ SyscallDesc("statfs", statfsFunc<X86Linux64>),
/* 138 */ SyscallDesc("fstatfs", unimplementedFunc),
/* 139 */ SyscallDesc("sysfs", unimplementedFunc),
/* 140 */ SyscallDesc("getpriority", unimplementedFunc),

32
src/sim/syscall_emul.hh
View file

@ -62,6 +62,7 @@
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <unistd.h>
@ -451,6 +452,7 @@ getElapsedTimeNano(T1 &sec, T2 &nsec)
//
//////////////////////////////////////////////////////////////////////
typedef struct statfs hst_statfs;
#if NO_STAT64
typedef struct stat hst_stat;
typedef struct stat hst_stat64;
@ -556,6 +558,32 @@ copyOutStat64Buf(SETranslatingPortProxy &mem, Addr addr,
tgt.copyOut(mem);
}
template <class OS>
static void
copyOutStatfsBuf(SETranslatingPortProxy &mem, Addr addr,
hst_statfs *host)
{
TypedBufferArg<typename OS::tgt_statfs> tgt(addr);
#if defined(__OpenBSD__) || defined(__APPLE__) || defined(__FreeBSD__)
tgt->f_type = 0;
#else
tgt->f_type = TheISA::htog(host->f_type);
#endif
tgt->f_bsize = TheISA::htog(host->f_bsize);
tgt->f_blocks = TheISA::htog(host->f_blocks);
tgt->f_bfree = TheISA::htog(host->f_bfree);
tgt->f_bavail = TheISA::htog(host->f_bavail);
tgt->f_files = TheISA::htog(host->f_files);
tgt->f_ffree = TheISA::htog(host->f_ffree);
memcpy(&tgt->f_fsid, &host->f_fsid, sizeof(host->f_fsid));
tgt->f_namelen = TheISA::htog(host->f_namelen);
tgt->f_frsize = TheISA::htog(host->f_frsize);
memcpy(&tgt->f_spare, &host->f_spare, sizeof(host->f_spare));
tgt.copyOut(mem);
}
/// Target ioctl() handler. For the most part, programs call ioctl()
/// only to find out if their stdout is a tty, to determine whether to
/// do line or block buffering. We always claim that output fds are
@ -1156,7 +1184,7 @@ statfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
if (result < 0)
return -errno;
OS::copyOutStatfsBuf(tc->getMemProxy(), bufPtr, &hostBuf);
copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
return 0;
}
@ -1182,7 +1210,7 @@ fstatfsFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
if (result < 0)
return -errno;
OS::copyOutStatfsBuf(tc->getMemProxy(), bufPtr, &hostBuf);
copyOutStatfsBuf<OS>(tc->getMemProxy(), bufPtr, &hostBuf);
return 0;
}