int cpu_watchpoint_insert(CPUState *env, target_ulong addr, target_ulong len, int flags, CPUWatchpoint **watchpoint) { target_ulong len_mask = ~(len - 1); CPUWatchpoint *wp; /* sanity checks: allow power-of-2 lengths, deny unaligned watchpoints */ if ((len != 1 && len != 2 && len != 4 && len != 8) || (addr & ~len_mask)) { fprintf(stderr, "qemu: tried to set invalid watchpoint at " TARGET_FMT_lx ", len=" TARGET_FMT_lu "\n", addr, len); return -EINVAL; } wp = qemu_malloc(sizeof(*wp)); wp->vaddr = addr; wp->len_mask = len_mask; wp->flags = flags; /* keep all GDB-injected watchpoints in front */ if (flags & BP_GDB) TAILQ_INSERT_HEAD(&env->watchpoints, wp, entry); else TAILQ_INSERT_TAIL(&env->watchpoints, wp, entry); tlb_flush_page(env, addr); if (watchpoint) *watchpoint = wp; return 0; }