Quoted from https://cygwin.com/pipermail/cygwin-cvs/2020q3/014516.html:
"The file mapping will be only a single page, 4K, and since 64 bit systems
don't support the AT_ROUND_TO_PAGE flag, the remainder of the 64K slot will
result in a SEGV when accessed."
"The justification is that there's very
re email.
>
>
> --- Original Message ---
> On Wednesday, February 15th, 2023 at 23:33, Corinna Vinschen
> corinna-cyg...@cygwin.com wrote:
>
>
>
> > On Feb 15 15:31, w6b7rk5yu4mt25v3 via Cygwin wrote:
> >
> > > I asked the developer of the inte
Feb 15 15:31, w6b7rk5yu4mt25v3 via Cygwin wrote:
>
> > I asked the developer of the interpreter. He said it's OK to use the
> > PAGE_SIZE value different than 4096. So I used this dirty hack:
> >
> > #ifndef CYGWIN
> > #define PAGE_SIZE 4096
> > #en
ll, it's
Cygwin's quirks here.
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--- Forwarded Message ---
From: Oskar Skog via Cygwin
Date: On Wednesday, February 15th, 2023 at 20:02
Subject: Re: Fw: Re: Why do these mprotect always fail?
To: cygwin@cygwin.com
> On 2023-02-15 14:40, w6
h, 2023 at 19:13, Corinna Vinschen
wrote:
> On Feb 15 11:14, w6b7rk5yu4mt25v3 via Cygwin wrote:
>
> > Corinna Vinschen wrote:
> >
> > > cygwin-developers is for developers woking on Cygwin itself, not for
> > > developers using Cygwin to develop something else. I d
don't top-post. Thanks.
>
> On Feb 15 09:43, w6b7rk5yu4mt25v3 via Cygwin wrote:
>
> > Almost forgot, PAGE_SIZE is set to 4096. This is a Linux application,
> > when I compile on Cygwin it complained that PAGE_SIZE is redefined but
> > the compilation was success never
Almost forgot, PAGE_SIZE is set to 4096. This is a Linux application, when I
compile on Cygwin it complained that PAGE_SIZE is redefined but the compilation
was success nevertheless. Only when I run the application, I always exited with
"Unable to mprotect".
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mprotect 1:
unsigned char* buffer;
int32_t available, size;
if(size > PAGE_SIZE) {
factor = size / PAGE_SIZE + 1;
}
available = factor * PAGE_SIZE;
if(posix_memalign((void**)&buffer, PAGE_SIZE, available)) {
std::wcerr << L"Unable to allocate JIT m
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