Currently I don't need support for wasm. But just in case I set `--no--expose_wasm` and `--jitless` flags.
Thank you for extra information! В 15:11:49 ч. UTC+3на вторник, 1 юни 2021 г. Clemens Backes написа: > Note that WebAssembly far jump tables also read the target address from > the code object (see JumpTableAssembler::EmitFarJumpSlot > <https://source.chromium.org/chromium/chromium/src/+/main:v8/src/wasm/jump-table-assembler.cc;l=32;drc=ffd9e82dd5dd314bad48ab602517bd378b6d2184>). > > There is no workaround for that, so if you want to support WebAssembly, you > would have to change how the far jump table works on x64. > > On Mon, May 31, 2021 at 5:46 PM martin dobrev <martin...@gmail.com> wrote: > >> Looks like this do the job. >> >> Thank you for the fast response. >> >> В 8:46:43 ч. UTC+3на понеделник, 31 май 2021 г. jgr...@chromium.org >> написа: >> >>> Yes, running with a non-readable .text section should work. >>> Pass --no-partial-constant-pool to disable the mechanism you mentioned >>> above. >>> >>> On Wed, May 26, 2021 at 3:43 PM martin dobrev <martin...@gmail.com> >>> wrote: >>> >>>> Hi, >>>> >>>> Recently i ported v8 for unix base platform (architecture is x64) where >>>> all executable memory is "execute only" => each instruction which try to >>>> read from executable memory result in access violation. The problem is >>>> that some of the code generated by `torque` needs to read from the code >>>> segments . For example Math.floor defined this constant >>>> `TNode<Float64T> two_52 = Float64Constant(4503599627370496.0E0);` >>>> >>>> later used in couple places in function implementation. And `torque` >>>> generate following assebly which result in crash, because instuction on >>>> '00000000F34A0909' try to read from the code segment. >>>> [image: asm.png] >>>> >>>> Is there a way to force `torque` to generate immediate/direct mov >>>> instead of relative one for constants or maybe i can move them in data >>>> segments somehow ? >>>> >>>> -- >>>> -- >>>> v8-users mailing list >>>> v8-u...@googlegroups.com >>>> http://groups.google.com/group/v8-users >>>> --- >>>> You received this message because you are subscribed to the Google >>>> Groups "v8-users" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to v8-users+u...@googlegroups.com. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/v8-users/65329c44-c9ed-45be-b600-769260d8a52bn%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/v8-users/65329c44-c9ed-45be-b600-769260d8a52bn%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- >> -- >> v8-users mailing list >> v8-u...@googlegroups.com >> http://groups.google.com/group/v8-users >> --- >> You received this message because you are subscribed to the Google Groups >> "v8-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to v8-users+u...@googlegroups.com. >> > To view this discussion on the web visit >> https://groups.google.com/d/msgid/v8-users/9ec8f5b4-ac7c-4ad1-9a52-7d73819a84a7n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/v8-users/9ec8f5b4-ac7c-4ad1-9a52-7d73819a84a7n%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > > Clemens Backes > > Software Engineer > > clem...@google.com > > Google Germany GmbH > > Erika-Mann-Straße 33 > > 80636 München > > Geschäftsführer: Paul Manicle, Halimah DeLaine Prado > > Registergericht und -nummer: Hamburg, HRB 86891 > > Sitz der Gesellschaft: Hamburg > > Diese E-Mail ist vertraulich. Falls sie diese fälschlicherweise erhalten > haben sollten, leiten Sie diese bitte nicht an jemand anderes weiter, > löschen Sie alle Kopien und Anhänge davon und lassen Sie mich bitte wissen, > dass die E-Mail an die falsche Person gesendet wurde. > > > This e-mail is confidential. If you received this communication by > mistake, please don't forward it to anyone else, please erase all copies > and attachments, and please let me know that it has gone to the wrong > person. > > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/63a67295-4989-4d63-920b-d68173a5cdcbn%40googlegroups.com.
