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[107.215.223.229]) by smtp.gmail.com with ESMTPSA id ca8-20020a17090af30800b002858ac5e401sm3359416pjb.45.2023.11.25.19.58.18 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 25 Nov 2023 19:58:18 -0800 (PST) From: Bakul Shah Message-Id: <5668E8DE-B3B3-408D-978E-C2358A614803@iitbombay.org> Content-Type: multipart/alternative; boundary="Apple-Mail=_C2A9D6C6-1581-46BD-BA39-083AF3921076" List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3774.200.91.1.1\)) Subject: Re: sbrk Date: Sat, 25 Nov 2023 19:58:07 -0800 In-Reply-To: Cc: Joseph Holsten , "freebsd-arm@freebsd.org" To: Warner Losh References: <2F758BA2-F7F5-4A2C-85CF-6969EE50309C@iitbombay.org> <949f8f16-1219-4f4a-abf6-f9727c95681b@Spark> X-Mailer: Apple Mail (2.3774.200.91.1.1) X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US] X-Rspamd-Queue-Id: 4SdFLh3Zt2z3CN4 --Apple-Mail=_C2A9D6C6-1581-46BD-BA39-083AF3921076 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 On Nov 25, 2023, at 7:47=E2=80=AFPM, Warner Losh wrote: >=20 > On Sat, Nov 25, 2023, 8:44 PM > wrote: >> Yes, it=E2=80=99s no longer included. It=E2=80=99s long been = deprecated, but that does make porting things like the original vi a bit = challenging. >>=20 >> Is there a particular project you=E2=80=99re trying to use it for? >=20 >=20 > It was never included in FreeBSD/arm64 due to the fact that the = address space is complicated now and there no longer is an area beyond = bss that you can expand into... let alone contract... >=20 > Emacs was not happy with it... Thanks. Note that linux does provide it (may be not perfect but I = thought FreeBSD cared more about compatibility....).=20 This came up in trying to compile the v language https://github.com/vlang/v It uses a libgc which seems to be derived from some ancestor of BDW GC = and there are so many defines my eyes glaze over. >=20 > Warner >=20 >> -- >> Joseph Holsten >> On Nov 25, 2023 at 19:41 -0800, Bakul Shah >, wrote: >>> Does sbrk not exist on FreeBSD-14 on arm64? Is this by design? >>>=20 >>> $ cat sb.c >>> #include >>> #include >>> int main(int c, char**v) { >>> void *x =3D sbrk(102400); >>> printf("%p\n", x); >>> } >>> $ cc sb.c >>> ld: error: undefined symbol: sbrk >>> >>> referenced by sb.c >>> >>> /tmp/sb-e97caf.o:(main) >>> cc: error: linker command failed with exit code 1 (use -v to see = invocation) >>>=20 --Apple-Mail=_C2A9D6C6-1581-46BD-BA39-083AF3921076 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 On Nov 25, = 2023, at 7:47=E2=80=AFPM, Warner Losh <imp@bsdimp.com> = wrote:

On Sat, Nov 25, 2023, 8:44 PM <joseph@josephholsten.com> = wrote:
Yes, it=E2=80=99s no longer included. It=E2=80=99s = long been deprecated, but that does make porting things like the = original vi a bit challenging.

Is there a particular project you=E2=80=99re trying to use it = for?

It was never included in = FreeBSD/arm64 due to the fact that the address space is complicated now = and there no longer is an area beyond bss that you can expand into... = let alone contract...

Emacs was not happy with = it...

Thanks. Note that = linux does provide it (may be not perfect but I thought FreeBSD cared = more about compatibility....). 

This came = up in trying to compile the v language

It uses a libgc which seems to be derived from some = ancestor of BDW GC and there are so many defines my eyes glaze = over.


Warner

--
Joseph Holsten
On Nov 25, 2023 at 19:41 -0800, Bakul = Shah <bakul@iitbombay.org>, wrote:
Does sbrk not exist on FreeBSD-14 = on arm64? Is this by design?

$ cat sb.c
#include <unistd.h>
#include <stdio.h>
int main(int c, char**v) {
        void *x =3D sbrk(102400);
        printf("%p\n", x);
}
$ cc sb.c
ld: error: undefined symbol: sbrk
>>> referenced by sb.c
>>>               = /tmp/sb-e97caf.o:(main)
cc: error: linker command failed with exit code 1 (use -v to see = invocation)


= --Apple-Mail=_C2A9D6C6-1581-46BD-BA39-083AF3921076--