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rtld segfault
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Authored by kevans on Oct 19 2020, 5:28 PM.
# gdb -core qemu_kyua.core /usr/bin/kyua
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Reading symbols from /usr/bin/kyua...
Reading symbols from /usr/lib/debug//usr/bin/kyua.debug...
warning: core file may not match specified executable file.
[New LWP 70289]
Core was generated by `kyua'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 memcpy () at /usr/src/contrib/cortex-strings/src/aarch64/memcpy.S:123
123 /usr/src/contrib/cortex-strings/src/aarch64/memcpy.S: No such file or directory.
(gdb) bt
#0 memcpy () at /usr/src/contrib/cortex-strings/src/aarch64/memcpy.S:123
#1 0x0000004000014fc4 in do_copy_relocations (dstobj=0x4002003008) at /usr/src/libexec/rtld-elf/aarch64/reloc.c:119
#2 0x0000004000016f68 in _rtld (sp=<optimized out>, exit_proc=<optimized out>, objp=<optimized out>)
at /usr/src/libexec/rtld-elf/rtld.c:763
#3 0x0000004000014dd8 in rtld_start () at /usr/src/libexec/rtld-elf/aarch64/rtld_start.S:41
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) up
#1 0x0000004000014fc4 in do_copy_relocations (dstobj=0x4002003008) at /usr/src/libexec/rtld-elf/aarch64/reloc.c:119
119 /usr/src/libexec/rtld-elf/aarch64/reloc.c: No such file or directory.
(gdb) print dstaddr
$1 = (void *) 0x360010 <typeinfo for std::length_error>
(gdb) print dstobj->relocbase
$2 = (caddr_t) 0x0
(gdb) print rela->r_offset
$3 = 3538960
(gdb) print dstsym->st_name
value has been optimized out
(gdb) print name
$4 = 0x203fbe "_ZTISt12length_error"

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kevans created this object in space S1 Global.