Merge tag 'pull-tcg-20241013' of https://gitlab.com/rth7680/qemu into staging

linux-user/i386: Emulate orig_ax
linux-user/vm86: Fix compilation with Clang
tcg: remove singlestep_enabled from DisasContextBase
accel/tcg: Add TCGCPUOps.tlb_fill_align
target/hppa: Handle alignment faults in hppa_get_physical_address
target/arm: Fix alignment fault priority in get_phys_addr_lpae

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* tag 'pull-tcg-20241013' of https://gitlab.com/rth7680/qemu: (27 commits)
  target/arm: Fix alignment fault priority in get_phys_addr_lpae
  target/arm: Implement TCGCPUOps.tlb_fill_align
  target/arm: Move device detection earlier in get_phys_addr_lpae
  target/arm: Pass MemOp to get_phys_addr_lpae
  target/arm: Pass MemOp through get_phys_addr_twostage
  target/arm: Pass MemOp to get_phys_addr_nogpc
  target/arm: Pass MemOp to get_phys_addr_gpc
  target/arm: Pass MemOp to get_phys_addr_with_space_nogpc
  target/arm: Pass MemOp to get_phys_addr
  target/hppa: Implement TCGCPUOps.tlb_fill_align
  target/hppa: Handle alignment faults in hppa_get_physical_address
  target/hppa: Fix priority of T, D, and B page faults
  target/hppa: Perform access rights before protection id check
  target/hppa: Add MemOp argument to hppa_get_physical_address
  accel/tcg: Use the alignment test in tlb_fill_align
  accel/tcg: Add TCGCPUOps.tlb_fill_align
  include/exec/memop: Introduce memop_atomicity_bits
  include/exec/memop: Rename get_alignment_bits
  include/exec/memop: Move get_alignment_bits from tcg.h
  accel/tcg: Assert noreturn from write-only page for atomics
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 10 insertions, 68 deletions

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 52c88a6..6cef8db 100644
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -203,7 +203,7 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *en
     (*regs)[12] = tswapreg(env->regs[R_EDX]);
     (*regs)[13] = tswapreg(env->regs[R_ESI]);
     (*regs)[14] = tswapreg(env->regs[R_EDI]);
-    (*regs)[15] = tswapreg(env->regs[R_EAX]); /* XXX */
+    (*regs)[15] = tswapreg(get_task_state(env_cpu_const(env))->orig_ax);
     (*regs)[16] = tswapreg(env->eip);
     (*regs)[17] = tswapreg(env->segs[R_CS].selector & 0xffff);
     (*regs)[18] = tswapreg(env->eflags);
@@ -306,7 +306,7 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *en
     (*regs)[8] = tswapreg(env->segs[R_ES].selector & 0xffff);
     (*regs)[9] = tswapreg(env->segs[R_FS].selector & 0xffff);
     (*regs)[10] = tswapreg(env->segs[R_GS].selector & 0xffff);
-    (*regs)[11] = tswapreg(env->regs[R_EAX]); /* XXX */
+    (*regs)[11] = tswapreg(get_task_state(env_cpu_const(env))->orig_ax);
     (*regs)[12] = tswapreg(env->eip);
     (*regs)[13] = tswapreg(env->segs[R_CS].selector & 0xffff);
     (*regs)[14] = tswapreg(env->eflags);
@@ -4314,7 +4314,7 @@ static int wmr_write_region(void *opaque, target_ulong start,
  */
 static int elf_core_dump(int signr, const CPUArchState *env)
 {
-    const CPUState *cpu = env_cpu((CPUArchState *)env);
+    const CPUState *cpu = env_cpu_const(env);
     const TaskState *ts = (const TaskState *)get_task_state((CPUState *)cpu);
     struct rlimit dumpsize;
     CountAndSizeRegions css;
diff --git a/linux-user/i386/cpu_loop.c b/linux-user/i386/cpu_loop.c
index 92beb68..7a35215 100644
--- a/linux-user/i386/cpu_loop.c
+++ b/linux-user/i386/cpu_loop.c
@@ -172,6 +172,7 @@ static void emulate_vsyscall(CPUX86State *env)
     /*
      * Perform the syscall.  None of the vsyscalls should need restarting.
      */
+    get_task_state(env_cpu(env))->orig_ax = syscall;
     ret = do_syscall(env, syscall, env->regs[R_EDI], env->regs[R_ESI],
                      env->regs[R_EDX], env->regs[10], env->regs[8],
                      env->regs[9], 0, 0);
@@ -221,6 +222,7 @@ void cpu_loop(CPUX86State *env)
         case EXCP_SYSCALL:
 #endif
             /* linux syscall from int $0x80 */
+            get_task_state(cs)->orig_ax = env->regs[R_EAX];
             ret = do_syscall(env,
                              env->regs[R_EAX],
                              env->regs[R_EBX],
@@ -239,6 +241,7 @@ void cpu_loop(CPUX86State *env)
 #ifdef TARGET_X86_64
         case EXCP_SYSCALL:
             /* linux syscall from syscall instruction.  */
+            get_task_state(cs)->orig_ax = env->regs[R_EAX];
             ret = do_syscall(env,
                              env->regs[R_EAX],
                              env->regs[R_EDI],
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index 98ad848..895bdd7 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -114,6 +114,10 @@ struct TaskState {
     uint32_t v86flags;
     uint32_t v86mask;
 #endif
+#if defined(TARGET_I386)
+    /* Last syscall number. */
+    target_ulong orig_ax;
+#endif
     abi_ulong child_tidptr;
 #ifdef TARGET_M68K
     abi_ulong tp_value;
diff --git a/linux-user/vm86.c b/linux-user/vm86.c
index 31a2d70..5091d53 100644
--- a/linux-user/vm86.c
+++ b/linux-user/vm86.c
@@ -47,30 +47,6 @@ static inline void vm_putw(CPUX86State *env, uint32_t segptr,
     cpu_stw_data(env, segptr + (reg16 & 0xffff), val);
 }
 
-static inline void vm_putl(CPUX86State *env, uint32_t segptr,
-                           unsigned int reg16, unsigned int val)
-{
-    cpu_stl_data(env, segptr + (reg16 & 0xffff), val);
-}
-
-static inline unsigned int vm_getb(CPUX86State *env,
-                                   uint32_t segptr, unsigned int reg16)
-{
-    return cpu_ldub_data(env, segptr + (reg16 & 0xffff));
-}
-
-static inline unsigned int vm_getw(CPUX86State *env,
-                                   uint32_t segptr, unsigned int reg16)
-{
-    return cpu_lduw_data(env, segptr + (reg16 & 0xffff));
-}
-
-static inline unsigned int vm_getl(CPUX86State *env,
-                                   uint32_t segptr, unsigned int reg16)
-{
-    return cpu_ldl_data(env, segptr + (reg16 & 0xffff));
-}
-
 void save_v86_state(CPUX86State *env)
 {
     CPUState *cs = env_cpu(env);
@@ -131,19 +107,6 @@ static inline void return_to_32bit(CPUX86State *env, int retval)
     env->regs[R_EAX] = retval;
 }
 
-static inline int set_IF(CPUX86State *env)
-{
-    CPUState *cs = env_cpu(env);
-    TaskState *ts = get_task_state(cs);
-
-    ts->v86flags |= VIF_MASK;
-    if (ts->v86flags & VIP_MASK) {
-        return_to_32bit(env, TARGET_VM86_STI);
-        return 1;
-    }
-    return 0;
-}
-
 static inline void clear_IF(CPUX86State *env)
 {
     CPUState *cs = env_cpu(env);
@@ -162,34 +125,6 @@ static inline void clear_AC(CPUX86State *env)
     env->eflags &= ~AC_MASK;
 }
 
-static inline int set_vflags_long(unsigned long eflags, CPUX86State *env)
-{
-    CPUState *cs = env_cpu(env);
-    TaskState *ts = get_task_state(cs);
-
-    set_flags(ts->v86flags, eflags, ts->v86mask);
-    set_flags(env->eflags, eflags, SAFE_MASK);
-    if (eflags & IF_MASK)
-        return set_IF(env);
-    else
-        clear_IF(env);
-    return 0;
-}
-
-static inline int set_vflags_short(unsigned short flags, CPUX86State *env)
-{
-    CPUState *cs = env_cpu(env);
-    TaskState *ts = get_task_state(cs);
-
-    set_flags(ts->v86flags, flags, ts->v86mask & 0xffff);
-    set_flags(env->eflags, flags, SAFE_MASK);
-    if (flags & IF_MASK)
-        return set_IF(env);
-    else
-        clear_IF(env);
-    return 0;
-}
-
 static inline unsigned int get_vflags(CPUX86State *env)
 {
     CPUState *cs = env_cpu(env);