Hi group,
since no reply came in the g++.help group, maybe someone on gcc.help
knows why this is happening? Fullquote attached & fup2 gnu.gcc.help.
Kind regards,
Johannes
Johannes Bauer wrote:
Hello group,
I'm using gcc to hack some low-level stuff - until recently I was
developing on x86_32 (i686), but now I switched to x86-64. As the
calling convention is different obviously I had to change large portions
of my code. Something was weird, however:
When calling functions, gcc always emits code to clear %rax before the
call is made. Is this some kind of calling convention I'm not aware of?
Can I specify a certain function attribute to stop gcc from emitting
that clearing beforehand?
Kind regards,
Johannes
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