[Bug tdep/29405] New: [gdb,tdep/aarch64] FAIL: gdb.base/step-over-syscall.exp: vfork: displaced=on/off: pc after stepi matches insn addr after syscall

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29405

            Bug ID: 29405
           Summary: [gdb,tdep/aarch64] FAIL:
                    gdb.base/step-over-syscall.exp: vfork:
                    displaced=on/off: pc after stepi matches insn addr
                    after syscall
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: tdep
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

On aarch64, I run into:
...
FAIL: gdb.base/step-over-syscall.exp: vfork: displaced=off: pc after stepi
matches insn addr after syscall
FAIL: gdb.base/step-over-syscall.exp: vfork: displaced=on: pc after stepi
matches insn addr after syscall
...

In more detail:
...
(gdb) PASS: gdb.base/step-over-syscall.exp: vfork: displaced=off: syscall
number matches
PASS: gdb.base/step-over-syscall.exp: vfork: displaced=off: find syscall insn
in vfork
x/2i $pc^M
=> 0xfffff7e31c0c <vfork+12>:   svc     #0x0^M
   0xfffff7e31c10 <vfork+16>:   cmn     x0, #0xfff^M
(gdb) PASS: gdb.base/step-over-syscall.exp: vfork: displaced=off: pc
before/after syscall instruction
stepi^M
[Detaching after vfork from child process 8493]^M
0x0000fffff7e31c14 in vfork () from /lib64/libc.so.6^M
1: x/i $pc^M
=> 0xfffff7e31c14 <vfork+20>:   b.cs    0xfffff7e31c1c <vfork+28>  // b.hs,
b.nlast^M
(gdb) PASS: gdb.base/step-over-syscall.exp: vfork: displaced=off: stepi vfork
insn
print /x $pc^M
$2 = 0xfffff7e31c14^M
(gdb) PASS: gdb.base/step-over-syscall.exp: vfork: displaced=off: pc after
stepi
FAIL: gdb.base/step-over-syscall.exp: vfork: displaced=off: pc after stepi
matches insn addr after syscall
...

I suppose the test-case expects to land on the cmn insn, but instead it lands
on  the next insn.

-- 
You are receiving this mail because:
You are on the CC list for the bug.