From a04fac976f02377237bb827d46854b669ebc2397 Mon Sep 17 00:00:00 2001 From: Brandon Potter Date: Thu, 17 Mar 2016 10:24:17 -0700 Subject: syscall_emul: extend mmap system call to support file backed mmaps For O3, which has a stat that counts reg reads, there is an additional reg read per mmap() call since there's an arg we no longer ignore. Otherwise, stats should not be affected. --- src/arch/mips/linux/linux.cc | 31 +++++++++++++++++++++++++++++-- src/arch/mips/linux/linux.hh | 21 +++++++++++++++++++-- 2 files changed, 48 insertions(+), 4 deletions(-) (limited to 'src/arch/mips/linux') diff --git a/src/arch/mips/linux/linux.cc b/src/arch/mips/linux/linux.cc index 4861f7cb9..2f0ca6090 100644 --- a/src/arch/mips/linux/linux.cc +++ b/src/arch/mips/linux/linux.cc @@ -28,10 +28,11 @@ * Authors: Korey Sewell */ -#include - #include "arch/mips/linux/linux.hh" +#include +#include + // open(2) flags translation table SyscallFlagTransTable MipsLinux::openFlagTable[] = { #ifdef _MSC_VER @@ -97,3 +98,29 @@ SyscallFlagTransTable MipsLinux::openFlagTable[] = { const int MipsLinux::NUM_OPEN_FLAGS = (sizeof(MipsLinux::openFlagTable)/sizeof(MipsLinux::openFlagTable[0])); + +// mmap(2) flags translation table +SyscallFlagTransTable MipsLinux::mmapFlagTable[] = { + { MipsLinux::TGT_MAP_SHARED, MAP_SHARED }, + { MipsLinux::TGT_MAP_PRIVATE, MAP_PRIVATE }, + { MipsLinux::TGT_MAP_ANON, MAP_ANON }, + { MipsLinux::TGT_MAP_DENYWRITE, MAP_DENYWRITE }, + { MipsLinux::TGT_MAP_EXECUTABLE, MAP_EXECUTABLE }, + { MipsLinux::TGT_MAP_FILE, MAP_FILE }, + { MipsLinux::TGT_MAP_GROWSDOWN, MAP_GROWSDOWN }, + { MipsLinux::TGT_MAP_HUGETLB, MAP_HUGETLB }, + { MipsLinux::TGT_MAP_LOCKED, MAP_LOCKED }, + { MipsLinux::TGT_MAP_NONBLOCK, MAP_NONBLOCK }, + { MipsLinux::TGT_MAP_NORESERVE, MAP_NORESERVE }, + { MipsLinux::TGT_MAP_POPULATE, MAP_POPULATE }, +#ifdef MAP_STACK + { MipsLinux::TGT_MAP_STACK, MAP_STACK }, +#endif + { MipsLinux::TGT_MAP_ANONYMOUS, MAP_ANONYMOUS }, + { MipsLinux::TGT_MAP_FIXED, MAP_FIXED }, +}; + +const unsigned MipsLinux::NUM_MMAP_FLAGS = + sizeof(MipsLinux::mmapFlagTable) / + sizeof(MipsLinux::mmapFlagTable[0]); + diff --git a/src/arch/mips/linux/linux.hh b/src/arch/mips/linux/linux.hh index 6e4b6a82d..f4b18397e 100644 --- a/src/arch/mips/linux/linux.hh +++ b/src/arch/mips/linux/linux.hh @@ -102,8 +102,25 @@ class MipsLinux : public Linux //@} /// For mmap(). - static const unsigned TGT_MAP_ANONYMOUS = 0x800; - static const unsigned TGT_MAP_FIXED = 0x10; + static SyscallFlagTransTable mmapFlagTable[]; + + static const unsigned TGT_MAP_SHARED = 0x00001; + static const unsigned TGT_MAP_PRIVATE = 0x00002; + static const unsigned TGT_MAP_ANON = 0x00800; + static const unsigned TGT_MAP_DENYWRITE = 0x02000; + static const unsigned TGT_MAP_EXECUTABLE = 0x04000; + static const unsigned TGT_MAP_FILE = 0x00000; + static const unsigned TGT_MAP_GROWSDOWN = 0x01000; + static const unsigned TGT_MAP_HUGETLB = 0x80000; + static const unsigned TGT_MAP_LOCKED = 0x08000; + static const unsigned TGT_MAP_NONBLOCK = 0x20000; + static const unsigned TGT_MAP_NORESERVE = 0x00400; + static const unsigned TGT_MAP_POPULATE = 0x10000; + static const unsigned TGT_MAP_STACK = 0x40000; + static const unsigned TGT_MAP_ANONYMOUS = 0x00800; + static const unsigned TGT_MAP_FIXED = 0x00010; + + static const unsigned NUM_MMAP_FLAGS; //@{ /// For getsysinfo(). -- cgit v1.2.3