From: Richard Henderson <richard.henderson@linaro.org>
To: "Lucas Mateus Castro(alqotel)" <lucas.araujo@eldorado.org.br>,
qemu-ppc@nongnu.org, qemu-devel@nongnu.org
Cc: danielhb413@gmail.com
Subject: Re: [PATCH 1/2] tests/tcg/ppc64le: Added an overflow with OE=1 test
Date: Thu, 18 Aug 2022 08:32:15 -0700 [thread overview]
Message-ID: <b219c68d-76e2-dd95-7855-99a58b5e5e95@linaro.org> (raw)
In-Reply-To: <20220817165704.165291-1-lucas.araujo@eldorado.org.br>
On 8/17/22 09:57, Lucas Mateus Castro(alqotel) wrote:
> +void sigfpe_handler(int sig, siginfo_t *si, void *ucontext)
> +{
> + uint64_t t;
> + uint64_t ch = 0x5fcfffe4965a17e0ull;
> + asm (
> + "stfd 2, %0\n\t"
> + : "=m"(t)
> + :
> + : "memory", "fr2"
> + );
No, you need to fetch f2 from ucontext. There's no guarantee of any specific values being
present in the signal handler otherwise.
> + return -1;
exit(-1), which return from main equates to, helpful over EXIT_FAILURE.
But here I'd tend to abort(), since it really shouldn't be reachable.
r~
next prev parent reply other threads:[~2022-08-18 15:53 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-17 16:57 [PATCH 1/2] tests/tcg/ppc64le: Added an overflow with OE=1 test Lucas Mateus Castro(alqotel)
2022-08-17 16:57 ` [PATCH 2/2] tests/tcg/ppc64le: Added an underflow with UE=1 test Lucas Mateus Castro(alqotel)
2022-08-18 15:32 ` Richard Henderson [this message]
2022-08-18 16:14 ` [PATCH 1/2] tests/tcg/ppc64le: Added an overflow with OE=1 test Lucas Mateus Martins Araujo e Castro
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=b219c68d-76e2-dd95-7855-99a58b5e5e95@linaro.org \
--to=richard.henderson@linaro.org \
--cc=danielhb413@gmail.com \
--cc=lucas.araujo@eldorado.org.br \
--cc=qemu-devel@nongnu.org \
--cc=qemu-ppc@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).