static void
exec_one_dummy_insn (struct regcache *regcache)
{
#define DUMMY_INSN_ADDR AIX_TEXT_SEGMENT_BASE+0x200
struct gdbarch *gdbarch = get_regcache_arch (regcache);
int ret, status, pid;
CORE_ADDR prev_pc;
void *bp;
/* We plant one dummy breakpoint into DUMMY_INSN_ADDR address. We
assume that this address will never be executed again by the real
code. */
bp = deprecated_insert_raw_breakpoint (gdbarch, NULL, DUMMY_INSN_ADDR);
/* You might think this could be done with a single ptrace call, and
you'd be correct for just about every platform I've ever worked
on. However, rs6000-ibm-aix4.1.3 seems to have screwed this up --
the inferior never hits the breakpoint (it's also worth noting
powerpc-ibm-aix4.1.3 works correctly). */
prev_pc = regcache_read_pc (regcache);
regcache_write_pc (regcache, DUMMY_INSN_ADDR);
if (ARCH64 ())
ret = rs6000_ptrace64 (PT_CONTINUE, ptid_get_pid (inferior_ptid),
1, 0, NULL);
else
ret = rs6000_ptrace32 (PT_CONTINUE, ptid_get_pid (inferior_ptid),
(int *) 1, 0, NULL);
if (ret != 0)
perror (_("pt_continue"));
do
{
pid = waitpid (ptid_get_pid (inferior_ptid), &status, 0);
}
while (pid != ptid_get_pid (inferior_ptid));
regcache_write_pc (regcache, prev_pc);
deprecated_remove_raw_breakpoint (gdbarch, bp);
}
void
default_skip_permanent_breakpoint (struct regcache *regcache)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
CORE_ADDR current_pc = regcache_read_pc (regcache);
int bp_len;
gdbarch_breakpoint_from_pc (gdbarch, ¤t_pc, &bp_len);
current_pc += bp_len;
regcache_write_pc (regcache, current_pc);
}