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Rich Felker d16d7b1099 early stage ldso: remove symbolic references via error handling function while the error handling function should not be reached in stage 2 (assuming ldso itself was linked correctly), this was not statically determinate from the compiler's perspective, and in theory a compiler performing LTO could lift the TLS references (errno and other things) out of the printf-family functions called in a stage where TLS is not yet initialized. instead, perform the call via a static-storage, internal-linkage function pointer which will be set to a no-op function until the stage where the real error handling function should be reachable. inspired by commit `63c67053a3`.	4 years ago
..
dlstart.c	define and use internal macros for hidden visibility, weak refs	8 years ago
dynlink.c	early stage ldso: remove symbolic references via error handling function	4 years ago

Rich Felker d16d7b1099 early stage ldso: remove symbolic references via error handling function

while the error handling function should not be reached in stage 2
(assuming ldso itself was linked correctly), this was not statically
determinate from the compiler's perspective, and in theory a compiler
performing LTO could lift the TLS references (errno and other things)
out of the printf-family functions called in a stage where TLS is not
yet initialized.

instead, perform the call via a static-storage, internal-linkage
function pointer which will be set to a no-op function until the stage
where the real error handling function should be reachable.

inspired by commit 63c67053a3.

4 years ago

dlstart.c define and use internal macros for hidden visibility, weak refs 8 years ago

dynlink.c early stage ldso: remove symbolic references via error handling function 4 years ago