[Bug c/24528] New: [ARM EB] strcpy() of small string constant produces wrong instructions

[Bug c/24528] New: [ARM EB] strcpy() of small string constant produces wrong instructions

[djohnson+gcc at sw dot starentnetworks dot com]

Given the following c code from sysvinit's init.c:

        if (ch->action == SYSINIT) strcpy(ch->rlevel, "#");

gcc is producing the correct set of instructions for little endian arm, but
incorrect set of instructions for big endian arm.


That line when compiled with -mlittle-endian (correct):

        ldr     r1, [r5, #40]
        cmp     r1, #13
        moveq   r3, #35
        moveq   r2, #0
        streqb  r3, [r5, #28]
        streqb  r2, [r5, #29]

That line when compiled with -mbig-endian (wrong):

        ldr     r1, [r5, #40]
        cmp     r1, #13
        moveq   r3, #0
        streqb  r3, [r5, #29]
        streqb  r3, [r5, #28]

This results in ch->rlevel[0] set to zero instead of '#'.

Offsets/enums are correct (40 for action, 28 for start of rlevel, and 13 for
SYSINIT).

I can post entire preprocessed and compiled output if needed.


compile line is:

arm-linux-gcc -c -mlong-calls -fPIC -mbig-endian -Wall -O2 -D_GNU_SOURCE init.c 

gcc version 3.3.6


-- 
           Summary: [ARM EB] strcpy() of small string constant produces
                    wrong instructions
           Product: gcc
           Version: 3.3.6
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: djohnson+gcc at sw dot starentnetworks dot com
 GCC build triplet: i686-linux
  GCC host triplet: i686-linux
GCC target triplet: arm-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24528

[Bug target/24528] [ARM EB] strcpy() of small string constant produces wrong instructions

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2005-10-25 21:40 -------
Can you attach the preprocessed source for the code you have?


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
           Keywords|                            |wrong-code


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24528

[Bug target/24528] [ARM EB] strcpy() of small string constant produces wrong instructions

[djohnson+gcc at sw dot starentnetworks dot com]

------- Comment #2 from djohnson+gcc at sw dot starentnetworks dot com  2005-10-25 21:43 -------
Created an attachment (id=10057)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10057&action=view)
preprocessed file


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24528

[Bug target/24528] [ARM EB] strcpy() of small string constant produces wrong instructions

[djohnson+gcc at sw dot starentnetworks dot com]

-- 

djohnson+gcc at sw dot starentnetworks dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |UNCONFIRMED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24528

[Bug target/24528] [ARM EB] strcpy() of small string constant produces wrong instructions

[rearnsha at gcc dot gnu dot org]

------- Comment #3 from rearnsha at gcc dot gnu dot org  2005-10-26 12:33 -------
If you can't upgrade to gcc-3.4, see the patch link in the bug this is a
duplicate of

*** This bug has been marked as a duplicate of 22528 ***


-- 

rearnsha at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24528