[Bug c++/17736] New: GDB only read 1 character from STDIN

["mohd_shahril_96 at yahoo dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=17736

            Bug ID: 17736
           Summary: GDB only read 1 character from STDIN
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
          Assignee: unassigned at sourceware dot org
          Reporter: mohd_shahril_96 at yahoo dot com

Currently I'm now learning assembly language, out of curiosity, I want to see
how my program that was coded using assembly work under the hood, so I load up
GDB (with -tui and layout asm ) and start debugging.

It came at my surprise when GDB asking for STDIN input, it only take 1
character and then stop taking others even if I'm not pressing enter.

I tried again in terminal, it's working fine and my program can take multiple
STDIN input without any problem.

Here I provide partion from my testing assembly, this problem is reproducible
with following assembly :

global main

segment .bss                        ; hold uninitialize buffer

szinput     resb    10              ; declare 10 bytes uninitialize buffer
nszinput    equ     $ - szinput     ; equ is meaning constant

segment .text

main:

    pusha
    mov     eax, DWORD 3            ; read syscall
    mov     ebx, DWORD 0            ; 0 is stdin file descriptor
    mov     ecx, szinput            ; void *buf
    mov     edx, nszinput           ; size_t count
    int     80h                     ; invoke syscall
    popa
    ret

Note that this assembly is for NASM assembler.

Running gdb --version, and this is the result : GNU gdb (GDB)
7.8.50.20141221-cvs

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