http://llvm.org/bugs/show_bug.cgi?id=13641
Bug #: 13641
Summary: powerpc64 target does not generate mandatory traceback
table
Product: new-bugs
Version: trunk
Platform: Other
OS/Version: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
On powerpc64-unknown-linux-gnu, the mandatory traceback table for debug and
exception handling support is not produced. See section 3.3 of the 64-bit
PowerPC ELF Application Binary Interface Supplement at
http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html. A
traceback table should appear after the last instruction of each function, and
should look something like this:
blr
.long 0
.byte 0,0,0,0,128,1,0,1
.size foo,.-.L.foo
The .long field is an illegal instruction that signals the start of the
traceback table, and the eight-byte entry that follows is the mandatory portion
of the traceback table. Code generated by LLVM does not include these two
fields.
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