go compiler on AT14.0 on POWER10 is broken
carlelove opened this issue · 4 comments
I am trying to compile a go program from the GDB testsuite and the go compiler segfaults.
Here is how to reproduce the issue.
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on ltcden2-lp1 cd to the GDB go tests. In my case they are in carll@ltcden2-lp1:~/GDB/binutils-gdb-current/gdb/testsuite/gdb.go
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try to compile the intefers.go file, i.e.
carll@ltcden2-lp1:~/GDB/binutils-gdb-current/gdb/testsuite/gdb.go$ go integers.go
Segmentation fault (core dumped)
It looks like there is something wrong with /opt/at14.0/lib64/power10/libgo.so.16:
$ /opt/at14.0/bin/go help
Segmentation fault (core dumped)
$ LD_PRELOAD=/opt/at14.0/lib64/libgo.so.16 /opt/at14.0/bin/go help
Go is a tool for managing Go source code.
...
It's stuck in a function that I can't identify:
=> 0x00007ffff7726f80 <+64>: ld r11,0(r3)
0x00007ffff7726f84 <+68>: ld r12,8(r3)
0x00007ffff7726f88 <+72>: mr r0,r3
0x00007ffff7726f8c <+76>: cmpdi r11,0
0x00007ffff7726f90 <+80>: add r3,r12,r13
0x00007ffff7726f94 <+84>: beqlr
0x00007ffff7726f98 <+88>: mr r3,r0
0x00007ffff7726f9c <+92>: mflr r11
0x00007ffff7726fa0 <+96>: std r11,8(r1)
0x00007ffff7726fa4 <+100>: std r2,24(r1)
0x00007ffff7726fa8 <+104>: ld r12,4744(r2)
0x00007ffff7726fac <+108>: mtctr r12
0x00007ffff7726fb0 <+112>: bctrl
0x00007ffff7726fb4 <+116>: ld r2,24(r1)
0x00007ffff7726fb8 <+120>: ld r11,8(r1)
0x00007ffff7726fbc <+124>: mtlr r11
0x00007ffff7726fc0 <+128>: blr
This function received an r3 value that looks broken:
>>> print/x $r3
$1 = 0xf20
Although unrelated to the issue, I also noticed this function is expecting that a TOC is properly set.
I'm testing if this patch fixes the issue.
I also had to apply commit 2dd7b93778d551b6981c8086ecb38e26f677bd2b.
After that, I was able to build and run one of the tests on P10:
$ ~/opt/at14.0/bin/go run hello.go; echo $?
Before assignment
Hello, world!
0
This issue has been fixed and will be available in AT 14.0-4.