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DynamicLinking.md: add notes about memory/table exports #234

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@yamt yamt commented Sep 3, 2024

This is my attempt to capture the discussion in
#232

This is my attempt to capture the discussion in
WebAssembly#232
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LGTM % comments

### Note for memory/table exports

The commonly used C conventions including WASIp1 require modules to
export the "memory" memory and the "__indirect_function_table" table.
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Use backticks here instead of quotes?


On the other hand, non-PIE executables need to export these instance
resources as usual.

## Implementation Status
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I wonder if we can/should add something under this header for wasi now?

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do you mean to update the implementation status section?

However, because PIE executables with this dynamic-linking convention
are already importing these instance resources, it's redundant to
export them as well. For that reason, for PIE executables, we don't
require these resources exported.
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Who is "we" here? If its WASI the perhaps this belongs in the wasi repo instead?

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i guess it should be in both. (wasi and here)

i added it here first because i feel the memory/table convention is more widely used than just wasi.

export them as well. For that reason, for PIE executables, we don't
require these resources exported.

Shared libraries don't need to export these instance resoures either
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"Shared libraries should also import these resources, since they share a memory and function table with the main module."

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