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From: "Jonathan M. Bresler" <jmb>
Message-Id: <199612052350.PAA13071@freefall.freebsd.org>
Subject: Re: status of windows, dos and svr4 emulation
To: cracauer@wavehh.hanse.de
Date: Thu, 5 Dec 1996 15:50:05 -0800 (PST)
Cc: vitjok@fasts.com, freebsd-emulation@freebsd.org
In-Reply-To: <9612050912.AA20676@wavehh.hanse.de> from "Martin Cracauer" at Dec 5, 96 10:12:39 am
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Martin Cracauer wrote:
> 
> >When netbsd's svr4 emulation will be ported to FreeBSD?
> 
> The only real issue is keeping Linux ELF binaries and Solaris Binaries
> (with are always ELF) different. NetBSD has the same problem. Most
> folks ended up compiling only one of Linux ELF *or* SVR4 into their
> kernels.

	i have kernel code that distinguishes between Linux ELF binaries
	and Solaris x86 2.4 ELF binaries.  the PT_INTERP is different
	for each type.

	at present solaris_prepsyscall blows the stack.

	anyone have access to Solaris x86 and can compile

	int main(int argc, char *argv[]) { ; }"

	and 

	int main(int argc, char *argv[]) { getpid(); }
jmb

Aspen:[203] id
uid=0(root) gid=0(wheel) groups=0(wheel), 2(kmem), 3(sys), 4(tty), 5(operator), 20(staff), 31(guest)
Aspen:[204] sysctl -w debug.elf_trace=1
debug.elf_trace: 0 -> 1
Aspen:[205] exit
Aspen:[206] exit
Aspen:[11] id
uid=1000(jmb) gid=20(staff) groups=20(staff), 0(wheel), 117(dialer)
Aspen:[12] pwd
/home/jmb/Projects/ELF/linux.bin
Aspen:[13] file ls
ls: ELF 32-bit LSB executable, Intel 80386, version 1
Aspen:[14] ./ls
ELF PT_PHDR section <8000034>
ELF PT_INTERP section </lib/ld-linux.so.1>
ELF PT_LOAD section .text <08000000,00006000> entry=08000cf0
ELF PT_LOAD section .bss size 3144 (c48)
.data <08006000,00001000>
ELF PT_DYNAMIC section ??
interpreter=</lib/ld-linux.so.1> /compat/linux
ELF(file) PT_LOAD section .text <10000000,00005000> entry=10000990
ELF(file) PT_LOAD section .bss size 1636 (664)
.data <10005000,00001000>
ELF(file) PT_DYNAMIC section
Executing Linux binary
./ls: can't open cache '/etc/ld.so.cache'
file           ls             movemail.orig  vi
ktrace.out     movemail       ping
Aspen:[15] cd ../solaris.bin
Aspen:[16] ./ls
ELF PT_PHDR section <8048034>
ELF PT_INTERP section </usr/lib/ld.so.1>
ELF PT_LOAD section .text <08048000,00004000> entry=080498e0
ELF PT_LOAD section .bss size 4920 (1338)
.data <0804c000,00002000>
ELF PT_DYNAMIC section ??
interpreter=</usr/lib/ld.so.1> /compat/solaris
ELF(file) PT_LOAD section .text <10000000,0000d000> entry=10003312
ELF(file) PT_LOAD section .bss size 3944 (f68)
.data <1000d000,00002000>
ELF(file) PT_DYNAMIC section
ELF(file) PT_NOTE section
Executing Solaris binary
Bad system call (core dumped)