riscv: [Patch 6/5] Improve Linux emulation for RISC-V
This is an add-on patch for the original series that implemented RISC-V that improves the implementation of Linux emulation for SE mode. Basically it cleans up linux/linux.hh by removing constants that haven't been defined for the RISC-V Linux proxy kernel and rearranging the stat struct so it aligns with RISC-V's implementation of it. It also adds placeholders for system calls that have been given numbers in RISC-V but haven't been given implementations yet. These system calls are as follows: - readlinkat - sigprocmask - ioctl - clock_gettime - getrusage - getrlimit - setrlimit The first five patches implemented RISC-V with the base ISA and multiply, floating point, and atomic extensions and added support for detailed CPU models with memory timing. [Fixed incompatibility with changes made from patch 1.] Signed-off by: Alec Roelke Signed-off by: Jason Lowe-Power <jason@lowepower.com>
This commit is contained in:
Alec Roelke
parent
126c0360e2
commit
84020a8aed
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@ -36,41 +36,41 @@
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class RiscvLinux : public Linux
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{
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public:
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static const int TGT_SIGHUP = 0x000001;
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static const int TGT_SIGINT = 0x000002;
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static const int TGT_SIGQUIT = 0x000003;
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static const int TGT_SIGILL = 0x000004;
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static const int TGT_SIGTRAP = 0x000005;
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static const int TGT_SIGIOT = 0x000006;
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static const int TGT_SIGABRT = 0x000006;
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static const int TGT_SIGEMT = 0x000007;
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static const int TGT_SIGFPE = 0x000008;
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static const int TGT_SIGKILL = 0x000009;
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static const int TGT_SIGBUS = 0x00000a;
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static const int TGT_SIGSEGV = 0x00000b;
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static const int TGT_SIGSYS = 0x00000c;
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static const int TGT_SIGPIPE = 0x00000d;
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static const int TGT_SIGALRM = 0x00000e;
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static const int TGT_SIGTERM = 0x00000f;
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static const int TGT_SIGUSR1 = 0x000010;
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static const int TGT_SIGUSR2 = 0x000011;
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static const int TGT_SIGCHLD = 0x000012;
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static const int TGT_SIGCLD = 0x000012;
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static const int TGT_SIGPWR = 0x000013;
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static const int TGT_SIGWINCH = 0x000014;
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static const int TGT_SIGURG = 0x000015;
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static const int TGT_SIGIO = 0x000016;
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static const int TGT_SIGPOLL = 0x000016;
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static const int TGT_SIGSTOP = 0x000017;
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static const int TGT_SIGTSTP = 0x000018;
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static const int TGT_SIGCONT = 0x000019;
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static const int TGT_SIGTTIN = 0x00001a;
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static const int TGT_SIGTTOU = 0x00001b;
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static const int TGT_SIGVTALRM = 0x00001c;
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static const int TGT_SIGPROF = 0x00001d;
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static const int TGT_SIGXCPU = 0x00001e;
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static const int TGT_SIGXFSZ = 0x00001f;
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static const int TGT_SIGHUP = 1;
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static const int TGT_SIGINT = 2;
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static const int TGT_SIGQUIT = 3;
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static const int TGT_SIGILL = 4;
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static const int TGT_SIGTRAP = 5;
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static const int TGT_SIGABRT = 6;
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static const int TGT_SIGIOT = 6;
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static const int TGT_SIGEMT = 7;
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static const int TGT_SIGFPE = 8;
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static const int TGT_SIGKILL = 9;
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static const int TGT_SIGBUS = 10;
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static const int TGT_SIGSEGV = 11;
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static const int TGT_SIGSYS = 12;
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static const int TGT_SIGPIPE = 13;
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static const int TGT_SIGALRM = 14;
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static const int TGT_SIGTERM = 15;
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static const int TGT_SIGURG = 16;
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static const int TGT_SIGSTOP = 17;
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static const int TGT_SIGTSTP = 18;
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static const int TGT_SIGCONT = 19;
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static const int TGT_SIGCHLD = 20;
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static const int TGT_SIGCLD = 20;
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static const int TGT_SIGTTIN = 21;
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static const int TGT_SIGTTOU = 22;
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static const int TGT_SIGPOLL = 23;
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static const int TGT_SIGIO = 23;
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static const int TGT_SIGXCPU = 24;
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static const int TGT_SIGXFSZ = 25;
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static const int TGT_SIGVTALRM = 26;
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static const int TGT_SIGPROF = 27;
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static const int TGT_SIGWINCH = 28;
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static const int TGT_SIGLOST = 29;
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static const int TGT_SIGPWR = 29;
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static const int TGT_SIGUSR1 = 30;
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static const int TGT_SIGUSR2 = 31;
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/// This table maps the target open() flags to the corresponding
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/// host open() flags.
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@ -81,119 +81,77 @@ class RiscvLinux : public Linux
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//@{
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/// open(2) flag values.
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static const int TGT_O_RDONLY = 0x00000000; //!< O_RDONLY
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static const int TGT_O_WRONLY = 0x00000001; //!< O_WRONLY
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static const int TGT_O_RDWR = 0x00000002; //!< O_RDWR
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static const int TGT_O_CREAT = 0x00000100; //!< O_CREAT
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static const int TGT_O_EXCL = 0x00000400; //!< O_EXCL
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static const int TGT_O_NOCTTY = 0x00000800; //!< O_NOCTTY
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static const int TGT_O_TRUNC = 0x00000200; //!< O_TRUNC
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static const int TGT_O_APPEND = 0x00000008; //!< O_APPEND
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static const int TGT_O_NONBLOCK = 0x00000080; //!< O_NONBLOCK
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static const int TGT_O_DSYNC = 0x00000010; //!< O_DSYNC
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static const int TGT_FASYNC = 0x00001000; //!< O_FASYNC
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static const int TGT_O_DIRECT = 0x00008000; //!< O_DIRECT
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static const int TGT_O_LARGEFILE = 0x00002000; //!< O_LARGEFILE
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static const int TGT_O_DIRECTORY = 0x00010000; //!< O_DIRECTORY
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static const int TGT_O_NOFOLLOW = 0x00020000; //!< O_NOFOLLOW
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static const int TGT_O_NOATIME = 0x00040000; //!< O_NOATIME
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static const int TGT_O_CLOEXEC = 0x00080000; //!< O_CLOEXEC
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static const int TGT_O_SYNC = 0x00004010; //!< O_SYNC
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static const int TGT_O_PATH = 0x00200000; //!< O_PATH
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static const int TGT_O_RDONLY = 0x000000; //!< O_RDONLY
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static const int TGT_O_WRONLY = 0x000001; //!< O_WRONLY
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static const int TGT_O_RDWR = 0x000002; //!< O_RDWR
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static const int TGT_O_CREAT = 0x000040; //!< O_CREAT
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static const int TGT_O_EXCL = 0x000080; //!< O_EXCL
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static const int TGT_O_NOCTTY = 0x000100; //!< O_NOCTTY
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static const int TGT_O_TRUNC = 0x000200; //!< O_TRUNC
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static const int TGT_O_APPEND = 0x000400; //!< O_APPEND
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static const int TGT_O_NONBLOCK = 0x000800; //!< O_NONBLOCK
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static const int TGT_O_SYNC = 0x001000; //!< O_SYNC
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static const int TGT_FSYNC = 0x001000; //!< FSYNC
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static const int TGT_FASYNC = 0x008000; //!< FASYNC
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// The following are not present in riscv64-unknown-elf <fcntl.h>
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static const int TGT_O_DSYNC = 0x010000; //!< O_DSYNC
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static const int TGT_O_CLOEXEC = 0x040000; //!< O_CLOEXEC
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static const int TGT_O_NOINHERIT = 0x040000; //!< O_NOINHERIT
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static const int TGT_O_DIRECT = 0x080000; //!< O_DIRECT
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static const int TGT_O_NOFOLLOW = 0x100000; //!< O_NOFOLLOW
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static const int TGT_O_DIRECTORY = 0x200000; //!< O_DIRECTORY
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// The following are not defined by riscv64-unknown-elf
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static const int TGT_O_LARGEFILE = 0x020000; //!< O_LARGEFILE
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static const int TGT_O_NOATIME = 0x800000; //!< O_NOATIME
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static const int TGT_O_PATH = 0x400000; //!< O_PATH
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//@}
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static const unsigned TGT_MAP_SHARED = 0x00001;
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static const unsigned TGT_MAP_PRIVATE = 0x00002;
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static const unsigned TGT_MAP_ANON = 0x00800;
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static const unsigned TGT_MAP_DENYWRITE = 0x02000;
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static const unsigned TGT_MAP_EXECUTABLE = 0x04000;
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static const unsigned TGT_MAP_FILE = 0x00000;
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static const unsigned TGT_MAP_GROWSDOWN = 0x01000;
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static const unsigned TGT_MAP_HUGETLB = 0x80000;
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static const unsigned TGT_MAP_LOCKED = 0x08000;
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static const unsigned TGT_MAP_NONBLOCK = 0x20000;
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static const unsigned TGT_MAP_NORESERVE = 0x00400;
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static const unsigned TGT_MAP_POPULATE = 0x10000;
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static const unsigned TGT_MAP_STACK = 0x40000;
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static const unsigned TGT_MAP_ANONYMOUS = 0x00800;
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static const unsigned TGT_MAP_FIXED = 0x00010;
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// Only defined in riscv-unknown-elf for proxy kernel and not linux kernel
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static const unsigned TGT_MAP_SHARED = 0x0001;
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static const unsigned TGT_MAP_PRIVATE = 0x0002;
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static const unsigned TGT_MAP_FIXED = 0x0010;
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static const unsigned TGT_MAP_ANONYMOUS = 0x0020;
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static const unsigned TGT_MAP_POPULATE = 0x1000;
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static const unsigned TGT_MREMAP_FIXED = 0x0020;
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static const unsigned NUM_MMAP_FLAGS;
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//@{
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/// For getsysinfo().
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static const unsigned GSI_PLATFORM_NAME = 103; //!< platform name as string
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static const unsigned GSI_CPU_INFO = 59; //!< CPU information
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static const unsigned GSI_PROC_TYPE = 60; //!< get proc_type
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static const unsigned GSI_MAX_CPU = 30; //!< max # cpus
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static const unsigned GSI_CPUS_IN_BOX = 55; //!< # of CPUs in system
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static const unsigned GSI_PHYSMEM = 19; //!< Physical memory in KB
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static const unsigned GSI_CLK_TCK = 42; //!< clock freq in Hz
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//@}
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typedef int64_t time_t;
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typedef uint64_t dev_t;
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typedef uint64_t ino_t;
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typedef uint32_t mode_t;
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typedef uint32_t nlink_t;
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typedef uint32_t uid_t;
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typedef uint32_t gid_t;
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typedef int64_t off_t;
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typedef uint64_t blksize_t;
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typedef uint64_t blkcnt_t;
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//@{
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/// For setsysinfo().
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static const unsigned SSI_IEEE_FP_CONTROL = 14; //!< ieee_set_fp_control()
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//@}
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//@{
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/// ioctl() command codes.
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static const unsigned TGT_TCGETA = 0x5401;
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static const unsigned TGT_TCSETAW = 0x5403;
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static const unsigned TGT_TCGETS = 0x540d;
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static const unsigned TGT_FIONREAD = 0x467f;
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static const unsigned TGT_TIOCGETP = 0x7408;
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static const unsigned TGT_TIOCSETP = 0x7409;
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static const unsigned TGT_TIOCSETN = 0x740a;
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//@}
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static bool
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isTtyReq(unsigned req)
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{
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switch (req) {
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case TGT_TIOCGETP:
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case TGT_TIOCSETP:
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case TGT_TIOCSETN:
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case TGT_FIONREAD:
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case TGT_TCGETS:
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case TGT_TCGETA:
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case TGT_TCSETAW:
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return true;
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default:
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return false;
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}
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}
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/// For table().
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static const int TBL_SYSINFO = 12;
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/// Resource constants for getrlimit() (overide some generics).
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static const unsigned TGT_RLIMIT_NPROC = 8;
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static const unsigned TGT_RLIMIT_AS = 6;
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static const unsigned TGT_RLIMIT_RSS = 7;
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static const unsigned TGT_RLIMIT_NOFILE = 5;
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static const unsigned TGT_RLIMIT_MEMLOCK = 9;
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/// Offset used to make sure that processes don't
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/// assign themselves to process IDs reserved for
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/// the root users.
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static const int NUM_ROOT_PROCS = 2;
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struct timespec {
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time_t tv_sec;
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int64_t tv_nsec;
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};
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typedef struct {
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int32_t uptime; /* Seconds since boot */
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uint32_t loads[3]; /* 1, 5, and 15 minute load averages */
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uint32_t totalram; /* Total usable main memory size */
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uint32_t freeram; /* Available memory size */
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uint32_t sharedram; /* Amount of shared memory */
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uint32_t bufferram; /* Memory used by buffers */
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uint32_t totalswap; /* Total swap space size */
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uint32_t freeswap; /* swap space still available */
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uint16_t procs; /* Number of current processes */
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uint32_t totalhigh; /* Total high memory size */
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uint32_t freehigh; /* Available high memory size */
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uint32_t mem_unit; /* Memory unit size in bytes */
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} tgt_sysinfo;
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dev_t st_dev;
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ino_t st_ino;
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mode_t st_mode;
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nlink_t st_nlink;
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uid_t st_uid;
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gid_t st_gid;
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dev_t st_rdev;
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dev_t __pad1;
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off_t st_size;
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blksize_t st_blksize;
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blkcnt_t st_blocks;
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uint64_t st_atimeX;
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uint64_t st_atime_nsec;
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uint64_t st_mtimeX;
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uint64_t st_mtime_nsec;
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uint64_t st_ctimeX;
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uint64_t st_ctime_nsec;
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int32_t ___glibc_reserved[2];
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} tgt_stat64;
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};
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#endif
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@ -71,13 +71,13 @@ unameFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
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std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
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{17, SyscallDesc("getcwd", getcwdFunc)},
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{23, SyscallDesc("dup", dupFunc)},
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{25, SyscallDesc("fcntl", fcntlFunc)},
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{25, SyscallDesc("fcntl", fcntl64Func)},
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{29, SyscallDesc("ioctl", ioctlFunc<RiscvLinux>)},
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{34, SyscallDesc("mkdirat", unimplementedFunc)},
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{35, SyscallDesc("unlinkat", unlinkatFunc<RiscvLinux>)},
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{37, SyscallDesc("linkat", unimplementedFunc)},
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{38, SyscallDesc("renameat", renameatFunc<RiscvLinux>)},
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{46, SyscallDesc("ftruncate", ftruncateFunc)},
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{46, SyscallDesc("ftruncate", ftruncate64Func)},
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{48, SyscallDesc("faccessat", faccessatFunc<RiscvLinux>)},
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{49, SyscallDesc("chdir", unimplementedFunc)},
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{56, SyscallDesc("openat", openatFunc<RiscvLinux>)},
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@ -88,10 +88,10 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
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{64, SyscallDesc("write", writeFunc)},
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{66, SyscallDesc("writev", writevFunc<RiscvLinux>)},
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{67, SyscallDesc("pread", unimplementedFunc)},
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{68, SyscallDesc("pwrite", unimplementedFunc)},
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{68, SyscallDesc("pwrite", pwrite64Func<RiscvLinux>)},
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{78, SyscallDesc("readlinkat", readlinkatFunc<RiscvLinux>)},
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{79, SyscallDesc("fstatat", unimplementedFunc)},
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{80, SyscallDesc("fstat", fstatFunc<RiscvLinux>)},
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{79, SyscallDesc("fstatat", fstatat64Func<RiscvLinux>)},
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{80, SyscallDesc("fstat", fstat64Func<RiscvLinux>)},
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{93, SyscallDesc("exit", exitFunc)},
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{94, SyscallDesc("exit_group", exitGroupFunc)},
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{113, SyscallDesc("clock_gettime", clock_gettimeFunc<RiscvLinux>)},
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@ -119,8 +119,8 @@ std::map<int, SyscallDesc> RiscvLinuxProcess::syscallDescs = {
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{1026, SyscallDesc("unlink", unlinkFunc)},
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{1030, SyscallDesc("mkdir", mkdirFunc)},
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{1033, SyscallDesc("access", accessFunc)},
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{1038, SyscallDesc("stat", statFunc<RiscvLinux>)},
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{1039, SyscallDesc("lstat", lstatFunc<RiscvLinux>)},
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{1038, SyscallDesc("stat", stat64Func<RiscvLinux>)},
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{1039, SyscallDesc("lstat", lstat64Func<RiscvLinux>)},
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{1062, SyscallDesc("time", timeFunc<RiscvLinux>)},
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{2011, SyscallDesc("getmainvars", unimplementedFunc)},
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};
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