[lld] r228381 - [Core] Update ContentPermissions

Rui Ueyama ruiu at google.com
Fri Feb 6 11:41:45 PST 2015


I don't get it. What do you mean by "all permissions map need to be done in
the writer"? Is that related to making the permission enums non-bitmask?

On Fri, Feb 6, 2015 at 6:58 AM, Shankar Easwaran <shankare at codeaurora.org>
wrote:

>
> Reverted this patch. I think all the permissions map need to be done in
> the writer.
>
>
> On 2/5/2015 11:48 PM, Rui Ueyama wrote:
>
>> This needed a pre-commit review. Obviously they are bitmasks just like
>> Unix
>> file permission. Not sure we want to lose that characteristic.
>>
>> On Thu, Feb 5, 2015 at 9:29 PM, Shankar Easwaran <shankare at codeaurora.org
>> >
>> wrote:
>>
>>  Author: shankare
>>> Date: Thu Feb  5 23:29:49 2015
>>> New Revision: 228381
>>>
>>> URL: http://llvm.org/viewvc/llvm-project?rev=228381&view=rev
>>> Log:
>>> [Core] Update ContentPermissions
>>>
>>> The values are already arranged in ascending order, and all tests still
>>> pass.
>>>
>>> Removing the values as its confusing when new enumerations need to be
>>> added.
>>>
>>> Modified:
>>>      lld/trunk/include/lld/Core/DefinedAtom.h
>>>
>>> Modified: lld/trunk/include/lld/Core/DefinedAtom.h
>>> URL:
>>> http://llvm.org/viewvc/llvm-project/lld/trunk/include/lld/
>>> Core/DefinedAtom.h?rev=228381&r1=228380&r2=228381&view=diff
>>>
>>> ============================================================
>>> ==================
>>> --- lld/trunk/include/lld/Core/DefinedAtom.h (original)
>>> +++ lld/trunk/include/lld/Core/DefinedAtom.h Thu Feb  5 23:29:49 2015
>>> @@ -157,14 +157,14 @@ public:
>>>     // important, because the layout pass may sort atoms by permission if
>>> other
>>>     // attributes are the same.
>>>     enum ContentPermissions {
>>> -    perm___  = 0,           // mapped as unaccessible
>>> -    permR__  = 8,           // mapped read-only
>>> -    permRW_  = 8 + 2,       // mapped readable and writable
>>> -    permRW_L = 8 + 2 + 1,   // initially mapped r/w, then made read-only
>>> -                            // loader writable
>>> -    permR_X  = 8 + 4,       // mapped readable and executable
>>> -    permRWX  = 8 + 2 + 4,   // mapped readable and writable and
>>> executable
>>> -    permUnknown = 16        // unknown or invalid permissions
>>> +    perm___,           // mapped as unaccessible
>>> +    permR__,           // mapped read-only
>>> +    permRW_,           // mapped readable and writable
>>> +    permRW_L,           // initially mapped r/w, then made read-only
>>> +                        // loader writable
>>> +    permR_X,            // mapped readable and executable
>>> +    permRWX,            // mapped readable and writable and executable
>>> +    permUnknown         // unknown or invalid permissions
>>>     };
>>>
>>>     enum SectionChoice {
>>>
>>>
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>>>
>>>
>
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