Module: ASMREPL::Linux

Includes:
Fiddle
Defined in:
lib/asmrepl/linux.rb

Defined Under Namespace

Classes: ThreadState, Tracer

Constant Summary collapse

PROT_READ =

from sys/mman.h on macOS

0x01
PROT_WRITE = 
0x02
PROT_EXEC = 
0x04
MAP_PRIVATE = 
0x0002
MAP_SHARED = 
0x0001
MAP_ANON = 
0x20
PTRACE_TRACEME = 
0
PTRACE_CONT = 
7
PTRACE_GETREGS =

x86_64-linux-gnu/sys/ptrace.h

12

Class Method Summary collapse

Class Method Details

.jitbuffer(size) ⇒ Object 



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# File 'lib/asmrepl/linux.rb', line 37

def self.jitbuffer size
  Fisk::Helpers::JITBuffer.new mmap_jit(size), size
end

.make_function(name, args, ret) ⇒ Object 



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# File 'lib/asmrepl/linux.rb', line 7

def self.make_function name, args, ret
  ptr = Handle::DEFAULT[name]
  func = Function.new ptr, args, ret, name: name
  define_singleton_method name, &func.to_proc
end

.mmap_jit(size) ⇒ Object 



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# File 'lib/asmrepl/linux.rb', line 31

def self.mmap_jit size
  ptr = mmap 0, size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_SHARED | MAP_ANON, -1, 0
  ptr.size = size
  ptr
end

.traceme ⇒ Object 



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# File 'lib/asmrepl/linux.rb', line 48

def self.traceme
  raise unless ptrace(PTRACE_TRACEME, 0, 0, 0).zero?
end