other/10415: problem with stack

other/10415: problem with stack

[b.grzes]

>Number:         10415
>Category:       other
>Synopsis:       problem with stack
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          wrong-code
>Submitter-Id:   net
>Arrival-Date:   Tue Apr 15 18:06:01 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Grzegorz Bieda
>Release:        Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2/specs
>Organization:
>Environment:
Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --host=i386-redhat-linux --with-system-zlib --enable-__cxa_atexit
Thread model: posix
gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)
>Description:
char buf[1], char buf[2], char buf[4] allocate on the stack 4 bytes:
pushl   %ebp
        movl    %esp, %ebp
        subl    $4, %esp

char buf[3], char buf[5], ... char buf[7] allocate 24 bytes
pushl   %ebp
        movl    %esp, %ebp
        subl    $24, %esp

char buf[8] alloocate 8 bytes:
pushl   %ebp
        movl    %esp, %ebp
        subl    $8, %esp

I compile program with option -S.
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
 Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --host=i386-redhat-linux --with-system-zlib --enable-__cxa_atexit
 Thread model: posix
 gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)
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