Merge remote-tracking branch 'remotes/rth/tags/pull-tcg-20210921' into staging

Move cpu_signal_handler declaration.
Restrict cpu_handle_halt to sysemu.
Make do_unaligned_access noreturn.
Misc tcg/mips cleanup
Misc tcg/sparc cleanup
Misc tcg/riscv cleanup

# gpg: Signature made Tue 21 Sep 2021 10:47:29 PM EDT
# gpg:                using RSA key 7A481E78868B4DB6A85A05C064DF38E8AF7E215F
# gpg:                issuer "richard.henderson@linaro.org"
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" [ultimate]

* remotes/rth/tags/pull-tcg-20210921:
  tcg/riscv: Remove add with zero on user-only memory access
  hw/core: Make do_unaligned_access noreturn
  tcg/sparc: Introduce tcg_out_mov_delay
  tcg/sparc: Drop inline markers
  tcg/mips: Drop special alignment for code_gen_buffer
  tcg/mips: Unset TCG_TARGET_HAS_direct_jump
  tcg/mips: Allow JAL to be out of range in tcg_out_bswap_subr
  tcg/mips: Drop inline markers
  accel/tcg: Restrict cpu_handle_halt() to sysemu
  include/exec: Move cpu_signal_handler declaration

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

2 files changed, 15 insertions, 1 deletions

diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index 5d1b6d80fb..9d5987ba04 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -662,6 +662,19 @@ static inline tb_page_addr_t get_page_addr_code_hostp(CPUArchState *env,
     }
     return addr;
 }
+
+/**
+ * cpu_signal_handler
+ * @signum: host signal number
+ * @pinfo: host siginfo_t
+ * @puc: host ucontext_t
+ *
+ * To be called from the SIGBUS and SIGSEGV signal handler to inform the
+ * virtual cpu of exceptions.  Returns true if the signal was handled by
+ * the virtual CPU.
+ */
+int cpu_signal_handler(int signum, void *pinfo, void *puc);
+
 #else
 static inline void mmap_lock(void) {}
 static inline void mmap_unlock(void) {}
diff --git a/include/hw/core/tcg-cpu-ops.h b/include/hw/core/tcg-cpu-ops.h
index 55123cb4d2..6cbe17f2e6 100644
--- a/include/hw/core/tcg-cpu-ops.h
+++ b/include/hw/core/tcg-cpu-ops.h
@@ -78,10 +78,11 @@ struct TCGCPUOps {
                                   MemTxResult response, uintptr_t retaddr);
     /**
      * @do_unaligned_access: Callback for unaligned access handling
+     * The callback must exit via raising an exception.
      */
     void (*do_unaligned_access)(CPUState *cpu, vaddr addr,
                                 MMUAccessType access_type,
-                                int mmu_idx, uintptr_t retaddr);
+                                int mmu_idx, uintptr_t retaddr) QEMU_NORETURN;
 
     /**
      * @adjust_watchpoint_address: hack for cpu_check_watchpoint used by ARM