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Re: [PATCH 20/24] bsd-user/arm/target_arch_signal.h: arm set_sigtramp_ar


From: Warner Losh
Subject: Re: [PATCH 20/24] bsd-user/arm/target_arch_signal.h: arm set_sigtramp_args
Date: Thu, 28 Oct 2021 16:22:52 -0600



On Thu, Oct 28, 2021 at 11:35 AM Kyle Evans <kevans@freebsd.org> wrote:
On Thu, Oct 28, 2021 at 12:25 PM Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On 10/19/21 9:44 AM, Warner Losh wrote:
> > +    regs->regs[TARGET_REG_PC] = ka->_sa_handler;
>
> Surely there should be some handling of thumb addresses here.
>

Honestly, this wouldn't surprise me- we're kind of a thumb landmine.
The other thumb-ish support is relatively recent as we hit something
that had an entry point on a thumb instruction; but we don't typically
build/run binaries including thumb instructions.

Yes. We don't have good, extensive test cases for this. We likely should.

Warner

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