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[linker] Expand and correct symbol requirement macros
REQUIRE_SYMBOL() formerly used a formulation of symbol requirement that would allow a link to succeed despite lacking a required symbol, because it did not introduce any relocations. Fix by renaming it to REQUEST_SYMBOL() (since the soft-requirement behavior can be useful) and add a REQUIRE_SYMBOL() that truly requires. Add EXPORT_SYMBOL() and IMPORT_SYMBOL() for REQUEST_SYMBOL()-like behavior that allows one to make use of the symbol, by combining a weak external on the symbol itself with a REQUEST_SYMBOL() of a second symbol. Signed-off-by: Marty Connor <mdc@etherboot.org>
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@@ -130,6 +130,7 @@ SECTIONS { | |
/DISCARD/ : { | ||
*(.comment) | ||
*(.note) | ||
*(.discard) | ||
} | ||
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/* | ||
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@@ -152,6 +152,7 @@ SECTIONS { | |
*(.eh_frame.*) | ||
*(.rel) | ||
*(.rel.*) | ||
*(.discard) | ||
} | ||
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/* | ||
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@@ -101,5 +101,6 @@ SECTIONS { | |
*(.eh_frame.*) | ||
*(.rel) | ||
*(.rel.*) | ||
*(.discard) | ||
} | ||
} |
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