[Bug ld/4284] New: Linker "relax" option results in bad subroutine calls
I am compiling and linking C for an ATmega2560. When I use the default options,
the resulting code works fine. When I try to remove unused trampoline entries
by placing -W,--relax in the ld options, the resulting code seems to have bad
subroutine calls.
Not all subroutine calls are bad, nor are all "bad" call targets always called
with a bad address.
Since the code image is around 120KBytes, this is a complex problem and my code
would not serve as a reasonable debugging case. I will try to come up with a
simple example that shows the problem.
I will attach more information as I get it.
--
Summary: Linker "relax" option results in bad subroutine calls
Product: binutils
Version: 2.18 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: unassigned at sources dot redhat dot com
ReportedBy: sbell at dataplay dot com
CC: bug-binutils at gnu dot org
GCC target triplet: avr
http://sourceware.org/bugzilla/show_bug.cgi?id=4284
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[Bug ld/4284] Linker "relax" option results in bad subroutine calls
--- Additional Comments From sbell at dataplay dot com 2007-04-19 22:09 --- This seems to be some interaction between FreeRTOS (currently version 4.2.1) and the relax function of the linker, perhaps because the linker replaces CALL with RCALL (or vice versa). At any rate, it's very difficult to come up with a simple test case that shows this. I will be working on a simpler program using FreeRTOS at some point and perhaps will be able to come up with a small demonstration of the problem. In the meantime, 1200 bytes out of 256K bytes is a small enough price to pay. -- What|Removed |Added Status|NEW |SUSPENDED http://sourceware.org/bugzilla/show_bug.cgi?id=4284 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
[Bug ld/4284] Linker "relax" option results in bad subroutine calls
--- Additional Comments From sbell at dataplay dot com 2007-10-09 21:28 --- The only reason I was interested in this was as a way to save a few bytes when my bootloader was misbehaving. I have fixed my bootloader so I have no interest in trying to chase this any further. Since I seem to be the only one that can reproduce this and I can't spend any more time isolating it, I recommend we close this bug. I'm setting the status to Resolved, WONTFIX. Stu Bell -- What|Removed |Added Status|SUSPENDED |RESOLVED Resolution||WONTFIX http://sourceware.org/bugzilla/show_bug.cgi?id=4284 --- You are receiving this mail because: --- You are on the CC list for the bug, or are watching someone who is. ___ bug-binutils mailing list bug-binutils@gnu.org http://lists.gnu.org/mailman/listinfo/bug-binutils
