gcc targetting hppa generates a call to memcpy() with -fno-builtin

[Philippe Biondi <phil@secdev.org>]

>Submitter-Id:  net
>Originator:    Philippe Biondi
>Organization:  SecDev.org
>Confidential:  no
>Synopsis:      gcc targetting hppa uses memcpy() with -fno-builtin
>Severity:      critical
>Priority:      low
>Category:      c
>Class:         wrong-code
>Release:       3.2.3 20030221 (Debian prerelease) (Debian
testing/unstable)
>Environment:
System: Linux rigel 2.4.21 #1 Tue Aug 19 13:11:08 CEST 2003 i686 GNU/Linux
Architecture: i686
host: i386-pc-linux-gnu
build: i386-pc-linux-gnu
target: hppa-unknown-linux-gnu
configured with: ../src/configure -v --enable-languages=c --prefix=/usr
--infodir=/usr/share/info --mandir=/usr/share/man
--with-gxx-include-dir=/usr/hppa-linux/include/g++ --enable-shared
--with-gnu-as --with-gnu-ld --with-system-zlib --enable-long-long
--enable-nls --without-included-gettext --disable-checking
--build=i386-linux --host=i386-linux --target=hppa-linux
>Description:
When using initialization for variables in the stack, data
must be copied from the .rodata section to the stack.
When the target is hppa, memcpy() is used, even if -fno-builtins is used.
>How-To-Repeat:
>How-To-Repeat:
$ cat hello.c
int main(void)
{
        char buf[] = "Hello world!\n";
        write(1, buf, sizeof(buf));
}
$ hppa-linux-gcc -S -o - -fno-builtins hello.c
        .LEVEL 1.1
        .section        .rodata
        .align 4
.LC0:
.stringz"Hello world!\n"
        .text
        .align 4
.globl main
                .type            main,@function
main:
        .PROC
        .CALLINFO FRAME=128,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3
        .ENTRY
        stw %r2,-20(%r30)
        copy %r3,%r1
        copy %r30,%r3
        stwm %r1,128(%r30)
        ldil LR'.LC0,%r19
        ldo RR'.LC0(%r19),%r19
        ldo 8(%r3),%r20
        ldi 14,%r21
        copy %r20,%r26
        copy %r19,%r25
        copy %r21,%r24
        bl memcpy,%r2  <<<< Here
        nop
        ldi 1,%r26
        ldo 8(%r3),%r25
        ldi 14,%r24
        bl write,%r2
        nop
        ldi 5,%r26
        bl exit,%r2
        nop
        nop
        .EXIT
        .PROCEND
.Lfe1:
        .size   main,.Lfe1-main
        .ident  "GCC: (GNU) 3.2.3 20030221 (Debian prerelease)"

>Fix:
??


-- 
Philippe Biondi <phil@ secdev.org>      SecDev.org
Security Consultant/R&D                 http://www.secdev.org
PGP KeyID:3D9A43E2  FingerPrint:C40A772533730E39330DC0985EE8FF5F3D9A43E2