ELFFileEmit(): building the OW runtime libraries for mips-linux fails with a segmentation fault

[winspool]

I tried mathlib and clib, but i get crashes in differnt programs.
Some code is shared between projects, and this bug is likely in the same location.

( linux.mps.tar.gz )

[<somewhere>/bld/mathlib/library/linux.mps/_s]
$ wmake -v -y -sn
Open Watcom Make Version 2.0 beta Mar  3 2024 23:04:16 (64-bit)
Copyright (c) 2002-xxxx The Open Watcom Contributors. All Rights Reserved.
Portions Copyright (c) 1988-2002 Sybase, Inc. All Rights Reserved.
Source code is available under the Sybase Open Watcom Public License.
See https://github.com/open-watcom/open-watcom-v2#readme for details.
cbrt.obj will be built because of ../../../../../bld/mathlib/c/cbrt.c
	%make echo_cc
	bwccmps -zq -eoe -D_BLDVER=1300 -D_CYEAR=2024 -DNDEBUG -D_ENABLE_AUTODEPEND   ../../../../../bld/mathlib/c/cbrt.c -I"../../../../../bld/mathlib/h" -I"../../../../../bld/hdr/linux/h" -I"../../../../../bld/watcom/h" -I"../../../../../bld/lib_misc/h" -I"../../../../../bld/comp_cfg/h" -wx-wce=C310-j-zastd=c99-we-x-xx-zam-s-oax-zl-wpx -fo=.obj   -bt=linux
Segmentation fault (core dumped)
Error(E42): Last command making (cbrt.obj) returned a bad status

I used gdb with set follow-fork-mode child and got:

Thread 3.1 "bwccmps" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff7f87740 (LWP 329550)]
0x00005555555dd3ba in ELFFileEmit ()
(gdb) bt
#0  0x00005555555dd3ba in ELFFileEmit ()
#1  0x00005555555db21a in OWLFileFini ()
#2  0x00005555555a8af0 in ObjFini ()
#3  0x00005555555b3043 in FiniCG ()
#4  0x000055555559a848 in BEStop ()
#5  0x000055555558c10a in DoCompile ()
#6  0x00005555555611d7 in DoCCompile ()
#7  0x0000555555561404 in FrontEnd ()
#8  0x000055555558043d in IDERunYourSelfArgv ()
#9  0x000055555558fcf9 in IdeDrvExecDLLArgv ()
#10 0x000055555558fee2 in main ()

I also tried to build "*/bld/mathlib/library/linux.ppc/_s/" and got the same crash.

And now another crash for mips-linux,
where the makefile is already present in the OW source tree:

[<somewhere>/bld/clib/cgsupp/library/linux.mps/_s]
$ wmake -v -y -sn 
Open Watcom Make Version 2.0 beta Mar  3 2024 23:04:16 (64-bit)
Copyright (c) 2002-xxxx The Open Watcom Contributors. All Rights Reserved.
Portions Copyright (c) 1988-2002 Sybase, Inc. All Rights Reserved.
Source code is available under the Sybase Open Watcom Public License.
See https://github.com/open-watcom/open-watcom-v2#readme for details.
stksmps.obj will be built because of ../../../a/stksmps.asm
	%make echo_as
	bwasmps -q -oe -D_BLDVER=1300 -D_CYEAR=2024 -DNDEBUG -D__MT__   ../../../a/stksmps.asm -I"../../../h" -I"../../../../../../bld/clib/h"  -I"../../../../../../bld/watcom/h" -I"../../../../../../bld/lib_misc/h" -I"../../../../../../bld/comp_cfg/h"  -we -fo=.obj    -bt=linux
Segmentation fault (core dumped)
Error(E42): Last command making (stksmps.obj) returned a bad status

I used gdb with set follow-fork-mode child and got:

Thread 3.1 "bwasmps" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff7f87740 (LWP 329027)]
0x0000555555567aa0 in ELFFileEmit ()
(gdb) bt
#0  0x0000555555567aa0 in ELFFileEmit ()
#1  0x0000555555565a1b in OWLFileFini ()
#2  0x00005555555606ed in ObjFini ()
#3  0x000055555555fc0b in main ()
(gdb) 

/me wishes for a crash handler.

[jmalak]

This is an unsupported platform. the solution depends on any contributor with knowledge of this platform if taking care of it.

[winspool]

This is an unsupported platform.
the solution depends on any contributor with knowledge of this platform if taking care of it.

The build was running on x86_64-linux.
I know, that mips-linux is not supported yet, but the available code generators for Alpha, Mips and PowerPC are unfortunately unused.

A simple helloworld.c compiles for mips into an object file, but linking fails:

searching libraries
Warning! W1008: cannot open math.lib : No such file or directory
Warning! W1008: cannot open clib.lib : No such file or directory
Error! E2028: _cstart_ is an undefined reference
Error! E2028: puts is an undefined reference
Warning! W1023: no starting address found, using 00000000
Error! E2044: exported symbol _cstart_ not found
Error! E2044: exported symbol puts not found

[jmalak]

No, it is not supported, there is no tools builded for MIPS. Only MIPS C cross-compiler for Intel host is build. It is to get info if C compiler build is somehow broken for MIPS and other RISC architectures. No CRTL implemented for MIPS. No tests etc.

[jmalak]

Only Alpha Windows NT platform is somehow complete that you could build complete OW for Alpha.
But it is untested etc.

[winspool]

Only Alpha Windows NT platform is somehow complete that you could build complete OW for Alpha.
But it is untested etc.

Thanks for the Info.
I will take a look with qemu and my NT4 install CD

For building the mips-linux runtime,
removing the bootstrap tools (bwasmps & bwccmps)
and using links to the tools from a full build instead
eleminates the crashes and
building the mips runtime goes a lot further.

[winspool]

I have no idea, why bwccmps(+ bwasmps) always fail,
but wccmps (+ wasmps) mostly works.

When using wccmps (+wasmps), only a few issues left for building the mips-linux clib runtime (math.lib builds):

clib/mthread:
wccmps fails to compile register.c

W131: No prototype found for function `_beginthread`
W131: No prototype found for function `_endthread`

(flag -we used: treat all warnings as errors)

clib/posix:
wccmps fails to compile ptcreate.c

W131: No prototype found for function `_beginthread`
W308: The function `_beginthread` without prototyped parameters called

(flag -we used: treat all warnings as errors)

clib/startup:
wasmsp crashes while assembling a/cstrtlmp.asm with:

free(): invalid pointer