On 06/27/2018 06:25 PM, Nick Clifton wrote:
OK - so if I change annobin so that it creates its own function start symbol,
eg libxsmm_crc32_u64_start and then it references this symbol in the .weak
directive, (instead of libxsmm_crc32_u64), then everything should be OK right ?
Since the new symbol will be exclusive to annobin, it will not be used in any
function calls, and so no R_X86_64_PC32 relocs should be generated against it.
Superficially, this will work.
But I'm a bit worried that the .weak still makes the symbol global, so
that it ends up in the dynamic symbol table.
Consider this:
.text
foo:
.long 0
bar:
.long 0
.globl baz
baz:
.long 0
.section .other
.weak bar
.quad bar
I see bar and baz in .dynsym as a result, and we definitely only want
baz there because foo and bar should remain local.
Thanks,
Florian
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