[Webkit-unassigned] [Bug 40231] Add native call support for ARM and Thumb-2 JIT with JSValue32

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=40231


Gabor Loki <loki at webkit.org> changed:

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  Attachment #58020|                            |review?, commit-queue-
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--- Comment #1 from Gabor Loki <loki at webkit.org>  2010-06-07 06:09:33 PST ---
Created an attachment (id=58020)
 --> (https://bugs.webkit.org/attachment.cgi?id=58020)
Add native call support for ARM and Thumb-2 JIT with JSValue32.

Same technique was used as on x86_64 with some limitations.
- we cannot use regT0 for the new callframe, because r0 (=regT0) should be the first argument of the host function.
- a callee preserved register should be used to hold the return address instead of the stack.
- preserveReturnAddressAfterCall/restoreReturnAddressBeforeReturn functions should be used to work with return address (instead of peek/poke on stack).

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