[Webkit-unassigned] [Bug 208671] New: [JSC] Cage JIT pointers to the JIT region
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Thu Mar 5 15:54:21 PST 2020
https://bugs.webkit.org/show_bug.cgi?id=208671
Bug ID: 208671
Summary: [JSC] Cage JIT pointers to the JIT region
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: JavaScriptCore
Assignee: webkit-unassigned at lists.webkit.org
Reporter: msaboff at apple.com
The idea here is that we emit code that cages code pointers to the JIT region so that JIT execution does not escape to not-JIT'ed regions except to known destinations. For functions that the JIT'ed code needs to call out to in C++ code space, provide a whitelist of allowable entry points. Finally, verify that the emitted instructions follow the designed restrictions.
This change is currently only implemented for ARM64 hardware.
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