linux_syscall_support.h

能把所有线程的数据和环境记录到文件,方便调试.

                          type5 arg5) {                                       \
          long __res;                                                         \
          __asm__ __volatile__("movq %5,%%r10; movq %6,%%r8; syscall" :       \
            "=a" (__res) : "0" (__NR_##name),                                 \
            "D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)),       \
            "g" ((long)(arg4)), "g" ((long)(arg5)) :                          \
            "r8", "r10", "r11", "rcx", "memory");                             \
          LSS_RETURN(type, __res);                                            \
      }
    #undef _syscall6
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
          long __res;                                                         \
          __asm__ __volatile__("movq %5,%%r10; movq %6,%%r8; movq %7,%%r9;"   \
                               "syscall" :                                    \
            "=a" (__res) : "0" (__NR_##name),                                 \
            "D" ((long)(arg1)), "S" ((long)(arg2)), "d" ((long)(arg3)),       \
            "g" ((long)(arg4)), "g" ((long)(arg5)), "g" ((long)(arg6)) :      \
            "r8", "r9", "r10", "r11", "rcx", "memory");                       \
          LSS_RETURN(type, __res);                                            \
      }
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __res;
      {
        register void *__tls  __asm__("r8")  = newtls;
        register int  *__ctid __asm__("r10") = child_tidptr;
        __asm__ __volatile__(/* if (fn == NULL)
                              *   return -EINVAL;
                              */
                             "testq  %4,%4\n"
                             "jz     1f\n"

                             /* if (child_stack == NULL)
                              *   return -EINVAL;
                              */
                             "testq  %5,%5\n"
                             "jz     1f\n"

                             /* childstack -= 2*sizeof(void *);
                              */
                             "subq   $16,%5\n"

                             /* Push "arg" and "fn" onto the stack that will be
                              * used by the child.
                              */
                             "movq   %7,8(%5)\n"
                             "movq   %4,0(%5)\n"

                             /* %rax = syscall(%rax = __NR_clone,
                              *                %rdi = flags,
                              *                %rsi = child_stack,
                              *                %rdx = parent_tidptr,
                              *                %r8  = new_tls,
                              *                %r10 = child_tidptr)
                              */
                             "movq   %2,%%rax\n"
                             "syscall\n"

                             /* if (%rax != 0)
                              *   return;
                              */
                             "testq  %%rax,%%rax\n"
                             "jnz    1f\n"

                             /* In the child. Terminate frame pointer chain.
                              */
                             "xorq   %%rbp,%%rbp\n"

                             /* Call "fn(arg)".
                              */
                             "popq   %%rax\n"
                             "popq   %%rdi\n"
                             "call   *%%rax\n"

                             /* Call _exit(%ebx).
                              */
                             "movq   %%rax,%%rdi\n"
                             "movq   %3,%%rax\n"
                             "syscall\n"

                             /* Return to parent.
                              */
                           "1:\n"
                             : "=a" (__res)
                             : "0"(-EINVAL), "i"(__NR_clone), "i"(__NR_exit),
                               "r"(fn), "S"(child_stack), "D"(flags), "r"(arg),
                               "d"(parent_tidptr), "r"(__tls), "r"(__ctid)
                             : "memory", "r11", "rcx");
      }
      LSS_RETURN(int, __res);
    }
  #elif defined(__ARM_ARCH_3__)
    /* Most definitions of _syscallX() neglect to mark "memory" as being
     * clobbered. This causes problems with compilers, that do a better job
     * at optimizing across __asm__ calls.
     * So, we just have to redefine all fo the _syscallX() macros.
     */
    #undef LSS_REG
    #define LSS_REG(r,a) register long __r##r __asm__("r"#r) = (long)a
    #undef  LSS_BODY
    #define LSS_BODY(type,name,args...)                                       \
          register long __res_r0 __asm__("r0");                               \
          long __res;                                                         \
          __asm__ __volatile__ (__syscall(name)                               \
                                : "=r"(__res_r0) : args : "lr", "memory");    \
          __res = __res_r0;                                                   \
          LSS_RETURN(type, __res)
    #undef _syscall0
    #define _syscall0(type, name)                                             \
      type LSS_NAME(name)() {                                                 \
        LSS_BODY(type, name);                                                 \
      }
    #undef _syscall1
    #define _syscall1(type, name, type1, arg1)                                \
      type LSS_NAME(name)(type1 arg1) {                                       \
        LSS_REG(0, arg1); LSS_BODY(type, name, "r"(__r0));                    \
      }
    #undef _syscall2
    #define _syscall2(type, name, type1, arg1, type2, arg2)                   \
      type LSS_NAME(name)(type1 arg1, type2 arg2) {                           \
        LSS_REG(0, arg1); LSS_REG(1, arg2);                                   \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1));                           \
      }
    #undef _syscall3
    #define _syscall3(type, name, type1, arg1, type2, arg2, type3, arg3)      \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3) {               \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2));                \
      }
    #undef _syscall4
    #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4) {   \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4);                                                     \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3));     \
      }
    #undef _syscall5
    #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5)                                             \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5) {                                       \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4); LSS_REG(4, arg5);                                   \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3),      \
                             "r"(__r4));                                      \
      }
    #undef _syscall6
    #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,  \
                      type5,arg5,type6,arg6)                                  \
      type LSS_NAME(name)(type1 arg1, type2 arg2, type3 arg3, type4 arg4,     \
                          type5 arg5, type6 arg6) {                           \
        LSS_REG(0, arg1); LSS_REG(1, arg2); LSS_REG(2, arg3);                 \
        LSS_REG(3, arg4); LSS_REG(4, arg5); LSS_REG(5, arg6);                 \
        LSS_BODY(type, name, "r"(__r0), "r"(__r1), "r"(__r2), "r"(__r3),      \
                             "r"(__r4), "r"(__r5));                           \
      }
    LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack,
                                   int flags, void *arg, int *parent_tidptr,
                                   void *newtls, int *child_tidptr) {
      long __res;
      {
        register int   __flags __asm__("r0") = flags;
        register void *__stack __asm__("r1") = child_stack;
        register void *__ptid  __asm__("r2") = parent_tidptr;
        register void *__tls   __asm__("r3") = newtls;
        register int  *__ctid  __asm__("r4") = child_tidptr;
        __asm__ __volatile__(/* if (fn == NULL || child_stack == NULL)
                              *   return -EINVAL;
                              */
                             "cmp   %2,#0\n"
                             "cmpne %3,#0\n"
                             "moveq %0,%1\n"
                             "beq   1f\n"

                             /* Push "arg" and "fn" onto the stack that will be
                              * used by the child.
                              */
                             "str   %5,[%3,#-4]!\n"
                             "str   %2,[%3,#-4]!\n"

                             /* %r0 = syscall(%r0 = flags,
                              *               %r1 = child_stack,
                              *               %r2 = parent_tidptr,
                              *               %r3 = newtls,
                              *               %r4 = child_tidptr)
                              */
                             __syscall(clone)"\n"

                             /* if (%r0 != 0)
                              *   return %r0;
                              */
                             "movs  r0,r0\n"
                             "bne   1f\n"

                             /* In the child, now. Call "fn(arg)".
                              */
                             "ldr   r0,[sp, #4]\n"
                             "mov   lr,pc\n"
                             "ldr   pc,[sp]\n"

                             /* Call _exit(%r0).
                              */
                             __syscall(exit)"\n"
                           "1:\n"
                             : "=r" (__res)
                             : "i"(-EINVAL),
                               "r"(fn), "r"(__stack), "r"(__flags), "r"(arg),
                               "r"(__ptid), "r"(__tls), "r"(__ctid)
                             : "lr", "memory");
      }
      LSS_RETURN(int, __res);
    }
  #endif
  #define __NR__exit   __NR_exit
  #define __NR__gettid __NR_gettid
  LSS_INLINE _syscall1(int,     chdir,           const char *,p)
  LSS_INLINE _syscall1(int,     close,           int,         f)
  LSS_INLINE _syscall1(int,     dup,             int,         f)
  LSS_INLINE _syscall2(int,     dup2,            int,         s,
                       int,            d)
  LSS_INLINE _syscall3(int,     execve,          const char*, f,
                       const char*const*,a,const char*const*, e)
  LSS_INLINE _syscall1(int,     _exit,           int,         e)
  LSS_INLINE _syscall3(int,     fcntl,           int,         f,
                       int,            c, long,   a)
  LSS_INLINE _syscall0(pid_t,   fork)
  LSS_INLINE _syscall2(int,     fstat,           int,         f,
                       struct stat*,   b)
  LSS_INLINE _syscall4(int,     futex,           int*,        a,
                       int,            o, int,    v, struct timespec *, t)
  LSS_INLINE _syscall3(int,     getdents,        int,         f,
                       struct dirent*, d, int,    c)
  LSS_INLINE _syscall3(int,     getdents64,      int,         f,
                       struct dirent64*, d, int,    c)
  LSS_INLINE _syscall0(gid_t,   getegid)
  LSS_INLINE _syscall0(uid_t,   geteuid)
  LSS_INLINE _syscall0(pid_t,   getpgrp)
  LSS_INLINE _syscall0(pid_t,   getpid)
  LSS_INLINE _syscall0(pid_t,   getppid)
  LSS_INLINE _syscall2(int,     getpriority,     int,         a,
                       int,            b)
  LSS_INLINE _syscall2(int,     getrlimit,       int,         r,
                       struct rlimit*, l)
  LSS_INLINE _syscall1(pid_t,   getsid,          pid_t,       p)
  LSS_INLINE _syscall0(pid_t,   _gettid)
  LSS_INLINE _syscall2(int,     kill,            pid_t,       p,
                       int,            s)
  LSS_INLINE _syscall3(off_t,   lseek,           int,         f,
                       off_t,          o, int,    w)
  LSS_INLINE _syscall2(int,     munmap,          void*,       s,
                       size_t,         l)
  LSS_INLINE _syscall4(void*,   mremap,          void*,       o,
                       size_t,         os,       size_t,      ns,
                       unsigned long,  f)
  LSS_INLINE _syscall3(int,     open,            const char*, p,
                       int,            f, int,    m)
  LSS_INLINE _syscall1(int,     pipe,            int*,        p)
  LSS_INLINE _syscall3(int,     poll,            struct pollfd*, u,
                       unsigned int,   n, int,    t)
  LSS_INLINE _syscall2(int,     prctl,           int,         o,
                       long,           a)
  LSS_INLINE _syscall4(long,    ptrace,          int,         r,
                       pid_t,          p, void *, a, void *, d)
  LSS_INLINE _syscall3(ssize_t, read,            int,         f,
                       void *,         b, size_t, c)
  LSS_INLINE _syscall3(int,     readlink,        const char*, p,
                       char*,          b, size_t, s)
  LSS_INLINE _syscall3(int,     sched_getaffinity,pid_t,      p,
                       unsigned int,   l, unsigned long *, m)
  LSS_INLINE _syscall3(int,     sched_setaffinity,pid_t,      p,
                       unsigned int,   l, unsigned long *, m)
  LSS_INLINE _syscall0(int,     sched_yield)
  LSS_INLINE _syscall1(long,    set_tid_address, int *,       t)
  LSS_INLINE _syscall1(int,     setfsgid,        gid_t,       g)
  LSS_INLINE _syscall1(int,     setfsuid,        uid_t,       u)
  LSS_INLINE _syscall2(int,     setpgid,         pid_t,       p,
                       pid_t,          g)
  LSS_INLINE _syscall3(int,     setpriority,     int,         a,