Re: port-mips/59064 (jemalloc switch to 5.3 broke userland)

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

If I run in live gdb, it works fine -- the value v0 fished out of the
GOT seems plausible:

(gdb) set environment LD_LIBRARY_PATH = /var/tmp/20250413/lib
(gdb) break malloc_default
Function "malloc_default" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (malloc_default) pending.
(gdb) run
Starting program: /var/tmp/20250413/rdhwr
tcb_syscall 0x786b2000
tcb_rdhwr 0x786b2000

Breakpoint 1, 0x7853be1c in malloc_default ()
   from /var/tmp/20250413/lib/libc.so.12
(gdb) display/i $pc
1: x/i $pc
=> 0x7853be1c <malloc_default+20>:      lw      v0,-23368(gp)
(gdb) si
0x7853be20 in malloc_default () from /var/tmp/20250413/lib/libc.so.12
1: x/i $pc
=> 0x7853be20 <malloc_default+24>:      .word   0x7c03e83b
(gdb) si
0x7853be24 in malloc_default () from /var/tmp/20250413/lib/libc.so.12
1: x/i $pc
=> 0x7853be24 <malloc_default+28>:      sd      s1,64(sp)
(gdb) print $v0
$1 = -28664
(gdb) print (void *)$v1
$2 = (void *) 0x786b9008

I get the same address in $gp live or post-mortem:

(gdb) print (void *)$gp
$4 = (void *) 0x78694270 <path+752>

So whatever is initializing -23368(gp), that is, 0x7868e728, in the
GOT, seems to be doing something wrong -- but only when run normally,
not under gdb!