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[Bug 1001466] /dev/null serial driver


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--- Comment #9 from Sergei Gavrikov <sergei.gavrikov@gmail.com> 2012-02-16 15:57:43 GMT ---
(In reply to comment #6)

> Maybe the proper solution is in the stdio lib?

My check for eCos fopen("/dev/null", ...) from the box

The eCos template:

  cdl_configuration eCos {
      template    default ;
      package CYGPKG_IO_FILEIO current ;
  };

Example of GDB session:

  % arm-eabi-gdb -q examples/hello
  (gdb) target remote /dev/ttyUSB0
  Remote debugging using /dev/ttyUSB0
  0x00002d48 in ?? ()
  (gdb) load
  Loading section .rom_vectors, size 0x40 lma 0x81008000
  Loading section .text, size 0x9714 lma 0x81008040
  Loading section .rodata, size 0x344 lma 0x81011754
  Loading section .data, size 0x484 lma 0x81011a98
  Start address 0x81008040, load size 40732
  Transfer rate: 3 KB/sec, 299 bytes/write.
  (gdb) b main
  Breakpoint 1 at 0x81008534: file hello.c, line 7.
  (gdb) b exit
  Breakpoint 2 at 0x81010ad0: file
/home/sg/repo/ecos-hg/packages/language/c/libc/startup/current/src/exit.cxx,
line 74.
  (gdb) cont
  Continuing.
  [New Thread 2]
  [Switching to Thread 2]

  Breakpoint 1, main () at hello.c:7
  7        FILE           *fh = fopen("/dev/null", "r+");
  (gdb) l
  2    #include <stdlib.h>
  3    
  4    int
  5    main(void)
  6    {
  7        FILE           *fh = fopen("/dev/null", "r+");
  8        fprintf(stdout, "Hello, eCos world! (at stdout)\n");
  9        fprintf(fh, "Hello, eCos world! (at /dev/null)\n");
  10        fclose(fh);
  11        fprintf(stdout, "Bye! (at stdout)\n");
  (gdb) cont
  Continuing.
  Hello, eCos world! (at stdout)
  Bye! (at stdout)

  Breakpoint 2, exit (status=0)
      at
/home/sg/repo/ecos-hg/packages/language/c/libc/startup/current/src/exit.cxx:74
  74    exit( int status )
  Current language:  auto; currently c++
  (gdb) 

And what you get?

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