When execute the following command on LoongArch: make check-gdb TESTS="gdb.base/async-shell.exp" we can see the following message in gdb/testsuite/gdb.sum: UNSUPPORTED: gdb.base/async-shell.exp: displaced stepping modify support_displaced_stepping to support displaced stepping on LoongArch. With this patch: PASS: gdb.base/async-shell.exp: run & PASS: gdb.base/async-shell.exp: shell echo foo PASS: gdb.base/async-shell.exp: interrupt PASS: gdb.base/async-shell.exp: process stopped I did the following tests that use support_displaced_stepping with this patch on LoongArch, there is no failed testcases. loongson@linux:~/gdb.git$ grep -r support_displaced_stepping gdb/testsuite/gdb.* gdb/testsuite/gdb.arch/disp-step-insn-reloc.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.base/step-over-no-symbols.exp: if { $displaced != "off" && ![support_displaced_stepping] } { gdb/testsuite/gdb.base/moribund-step.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.base/async-shell.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.base/inferior-died.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.base/step-over-syscall.exp: if {$displaced == "on" && ![support_displaced_stepping]} { gdb/testsuite/gdb.mi/mi-watch-nonstop.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.mi/mi-ns-stale-regcache.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.mi/mi-nonstop.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.mi/mi-nsmoribund.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.mi/mi-nsintrall.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.mi/mi-nsthrexec.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.mi/mi-nonstop-exit.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.multi/watchpoint-multi.exp:if [support_displaced_stepping] { gdb/testsuite/gdb.python/py-evthreads.exp:if { ![support_displaced_stepping] } { gdb/testsuite/gdb.threads/step-over-lands-on-breakpoint.exp: if { $displaced != "off" && ![support_displaced_stepping] } { gdb/testsuite/gdb.threads/interrupt-while-step-over.exp: if { ${displaced-stepping} != "off" && ![support_displaced_stepping] } { gdb/testsuite/gdb.threads/step-over-trips-on-watchpoint.exp: if { $displaced != "off" && ![support_displaced_stepping] } { Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>