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Tested-by: Emil Velikov <[email protected]>
Reviewed-and-Tested-by: Andreas Boll <[email protected]>
Reviewed-by: Jordan Justen <[email protected]>
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x86_64_entry_start needs to be declared static in the C code,
in order to have the correct address in entry_get_public
(seems not to be needed on x86).
The compiler needs to lookup a local not a global object.
Otherwise addresses needed for _glapi_proc_address will be computed
from some random offset (0x6400229a61058b48 in my case).
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In bridge mode, mapi no longer implements glapi.h. It becomes a user of
glapi.h. Imagine an app that uses both libGL.so and libGLESv2.so.
There will be two copies of glapi in the app's memory. It is possible
that _glapi_get_dispatch does not return what _glapi_set_dispatch set,
if they access different copies of the global variables. The solution
to this situation to build either one of the libraries as a bridge to
the other. Or build both libraries as bridges to another shared
glapi library.
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When MAPI_MODE_GLAPI is defined, u_current_table is renamed to
_glapi_Dispatch or _glapi_tls_Dispatch. The ASM dispatchers should not
use hardcoded name.
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Given a dispatch slot, entry_get_public returns the address of the
corresponding public entry point. There may be more than one of them.
But since they are all equivalent, it is fine to return any one of them.
With entry_get_public, the address of any public entry point can be
calculated at runtime when an assembly dispatcher is used. There is no
need to have a mapping table in such case. This omits the unnecessary
relocations from the binary.
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Try not to use macros to make u_current.h appear to be glapi.h. Use
u_current.h to implement glapi.h instead whenever possible.
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TLS requires kernel >= 2.4.20. Per glapi.
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Do not use "void *" in arithmetics.
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That is, replace the old _glapi_* names by new names that start with
u_current_. When MAPI_GLAPI_CURRENT is defined, u_current.h defines
rename macros to restore the old names. That is done for ABI
compatibility.
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