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vulkan: Support 32-bit "weak" symbols on MSVC 

MSVC uses different decorated names for 32-bit versus 64-bit. Declare
all argument sizes for 32-bit because computing the actual size would be
difficult.

Fixes: 9be7aa3fc8 ("vulkan: Add a common entrypoint table generator")
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10573>
This commit is contained in:
James Park 2021-05-02 02:24:09 -07:00 committed by Marge Bot
parent a5a86adc23
commit fb7be7870c
1 changed files with 11 additions and 3 deletions
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14
src/vulkan/util/vk_entrypoints_gen.py
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@ -109,6 +109,10 @@ TEMPLATE_C = Template(COPYRIGHT + """
/* Weak aliases for all potential implementations. These will resolve to
* NULL if they're not defined, which lets the resolve_entrypoint() function
* either pick the correct entry point.
*
* MSVC uses different decorated names for 32-bit versus 64-bit. Declare
* all argument sizes for 32-bit because computing the actual size would be
* difficult.
*/
<%def name="entrypoint_table(type, entrypoints, prefixes)">
@ -119,10 +123,14 @@ TEMPLATE_C = Template(COPYRIGHT + """
% endif
% for p in prefixes:
#ifdef _MSC_VER
#pragma comment(linker, "/alternatename:${p}_${e.name}_Weak=${p}_${e.name}_Null")
#pragma comment(linker, "/alternatename:${p}_${e.name}=${p}_${e.name}_Weak")
${e.return_type} (*${p}_${e.name}_Null)(${e.decl_params()}) = 0;
${e.return_type} ${p}_${e.name}_Weak(${e.decl_params()});
#ifdef _M_IX86
% for args_size in [4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 60, 104]:
#pragma comment(linker, "/alternatename:_${p}_${e.name}@${args_size}=_${p}_${e.name}_Null")
% endfor
#else
#pragma comment(linker, "/alternatename:${p}_${e.name}=${p}_${e.name}_Null")
#endif
#else
VKAPI_ATTR ${e.return_type} VKAPI_CALL ${p}_${e.name}(${e.decl_params()}) __attribute__ ((weak));
#endif