• Junliang Yan's avatar
    PPC/s390: [builtins] Improve CallApiCallback calling convention. · 421cf613
    Junliang Yan authored
    Port c142e0a2
    
    Original Commit Message:
    
        Refactor the CallApiCallback builtin to
    
        - pass the context as with other stubs, and
        - pass holder and call data in registers.
    
        This avoids having to place holder and call data onto the stack, and
        thus makes it possible to easily call the CallApiCallback builtin from
        other builtins while just forwarding the (stack) arguments. The idea
        is to use this in the future to optimize the general case of calling
        into any API method via a FunctionTemplateInfo and doing appropriate
        security and/or interface checks upfront as necessary (eventually making
        the HandleApiCall C++ builtin obsolete at some point).
    
    R=bmeurer@chromium.org, joransiu@ca.ibm.com, michael_dawson@ca.ibm.com
    BUG=
    LOG=N
    
    Change-Id: Ic6c246bb28a6affa6fe015c1207c773b375a2b30
    Reviewed-on: https://chromium-review.googlesource.com/c/1470443Reviewed-by: 's avatarMilad Farazmand <miladfar@ca.ibm.com>
    Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
    Cr-Commit-Position: refs/heads/master@{#59562}
    421cf613
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