Messages in this thread | | | Date | Sun, 16 Jan 2000 14:11:32 -0500 (EST) | From | Chris Noe <> | Subject | Re: _syscall2 in PIC code on ix86 |
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On Sun, 16 Jan 2000, Horst von Brand wrote: > %ebx is used to hold a pointer to the GOT for PIC, and syscalls are trying > to use ot for the second argument.
Right. That was the original problem that Keith was running into, that I tried to fix without fully understanding how the asm constraints worked. :)
> BTW, how is this important? glibc is doing it right, I'd say leave it along > (and perhaps point people who want to build their own shlib using raw > syscalls to glibc for ideas)
'Twas meant as more of a mental exercise for myself than a needed feature. I'll agree that it's not something needed in the kernel proper. Though maybe there should be a comment or something in unistd.h to the effect of "we use %ebx in syscalls -- if you're using -fpic, get ready for writing your own syscall entry macros"...
Thanks all.
Chris Noe (stiker@northlink.com)
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