Hi Dave,
On 10/28/2009 12:19 AM, John David Anglin wrote:
From my understanding of things, it shouldn't be necessary to remove the
unwind info for unused weak symbols if they aren't garbage collected.
What do you mean with "garbage collected" ? "dropped from the executable" ?
AFAICS, the weak function was completely dropped from the vmlinux file.
Some more info:
The unwind function in the parisc linux kernel walks the (sorted!) unwind list.
If one entry is wrong this can lead to incorrect unwinding.
In this case:
<arch_mod_section_prepend>: [0x1011fc4c-0x1011fc74] - non-weak function
Entry_GR=1 Save_SP Total_frame_size=8
<arch_mod_section_prepend>: [0x1011fc4c-0x10167cf4] - weak function
Entry_GR=1 Save_SP Total_frame_size=8
<module_arch_cleanup>: [0x1011fc78-0x1011fcb8]
Entry_GR=2 Save_SP Save_RP Total_frame_size=8
I see a those options:
a) drop the second (weak) unwind info entry
b) for the weak function, use the same start- and end-addresses as the non-weak entry.
Option b) would probably need some adjustments to the existing parisc
specific unwind function.
Helge
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