I can reproduce the issue on a Debian kernel booted with 'syscall.x32=y'. The failure looks a little different:
# chroot debian-sparc64 *** longjmp causes uninitialized stack frame ***: /bin/bash terminated Unhandled trap: 0x34 pc: 0000000000163860 npc: 0000000000163864 %g0-3: 0000000000000000 0000000000008004 0000000000000000 0000000000000000 %g4-7: 0000000000000002 0000000000000008 4765744346410000 0000004000ee2700 %o0-3: 0000000000000004 00000040007fde59 00000040007fde59 00000000002f09a8 %o4-7: 0000000000000003 00000000002ef400 00000040007fdd99 00000040007fdf01 %l0-3: 000000000000005b 00000000002fced8 0000000000000010 0000000000000000 %l4-7: 00000000002fced8 0000000000000001 000000000000005d 0000004000edc000 %i0-3: 0000004000d778a0 00000040007ff568 0000000000000000 0000000000000004 %i4-7: 0000004000ee08c8 0000004000ee08b0 00000040007fecb1 0000004000d77b00 %f00: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f16: 0000000000000003 0000000000000000 0000000000000000 0000000000000000 %f24: 0000000000000000 0000000000000000 0000000100000000 0000000000000000 %f32: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f40: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f48: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 %f56: 0000000000000001 0000000000000000 0000000000000000 0000000000000000 pstate: 00000092 ccr: 44 (icc: -Z-- xcc: -Z--) asi: f0 tl: 0 pil: 0 cansave: 5 canrestore: 1 otherwin: 0 wstate: 0 cleanwin: 7 cwp: 2 fsr: 0000000000000000 y: 0000000000000000 fprs: 0000000000000004
