proc_pid_syscall(5) - Linux manual page (original) (raw)

procpidsyscall(5) File Formats Manual procpidsyscall(5)

NAME top

   /proc/pid/syscall - currently executed system call

DESCRIPTION top

   _/proc/_pid_/syscall_ (since Linux 2.6.27)
          This file exposes the system call number and argument
          registers for the system call currently being executed by
          the process, followed by the values of the stack pointer
          and program counter registers.  The values of all six
          argument registers are exposed, although most system calls
          use fewer registers.

          If the process is blocked, but not in a system call, then
          the file displays -1 in place of the system call number,
          followed by just the values of the stack pointer and
          program counter.  If process is not blocked, then the file
          contains just the string "running".

          This file is present only if the kernel was configured with
          **CONFIG_HAVE_ARCH_TRACEHOOK**.

          Permission to access this file is governed by a ptrace
          access mode **PTRACE_MODE_ATTACH_FSCREDS** check; see
          [ptrace(2)](../man2/ptrace.2.html).

SEE ALSO top

   [proc(5)](../man5/proc.5.html)

COLOPHON top

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Linux man-pages 6.10 2024-05-02 procpidsyscall(5)