linux-user: Pass CPUArchState to target_restore_altstack

In most cases we were already passing get_sp_from_cpustate
directly to the function.  In other cases, we were passing
a local variable which already contained the same value.
In the rest of the cases, we were passing the stack pointer
out of env directly.

Reviewed by: Warner Losh <imp@bsdimp.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210426025334.1168495-5-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

linux-user/aarch64/signal.c

@@ -561,7 +561,7 @@ long do_rt_sigreturn(CPUARMState *env)
         goto badframe;
     }
 
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/alpha/signal.c

@@ -257,7 +257,7 @@ long do_rt_sigreturn(CPUAlphaState *env)
     set_sigmask(&set);
 
     restore_sigcontext(env, &frame->uc.tuc_mcontext);
-    target_restore_altstack(&frame->uc.tuc_stack, env->ir[IR_SP]);
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/arm/signal.c

@@ -685,7 +685,7 @@ static int do_sigframe_return_v2(CPUARMState *env,
         }
     }
 
-    target_restore_altstack(&uc->tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&uc->tuc_stack, env);
 
 #if 0
     /* Send SIGTRAP if we're single-stepping */
@@ -769,7 +769,7 @@ static long do_rt_sigreturn_v1(CPUARMState *env)
         goto badframe;
     }
 
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
 #if 0
     /* Send SIGTRAP if we're single-stepping */

linux-user/hexagon/signal.c

@@ -260,7 +260,7 @@ long do_rt_sigreturn(CPUHexagonState *env)
     }
 
     restore_ucontext(env, &frame->uc);
-    target_restore_altstack(&frame->uc.uc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.uc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/hppa/signal.c

@@ -187,7 +187,7 @@ long do_rt_sigreturn(CPUArchState *env)
     set_sigmask(&set);
 
     restore_sigcontext(env, &frame->uc.tuc_mcontext);
-    target_restore_altstack(&frame->uc.tuc_stack, env->gr[30]);
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/i386/signal.c

@@ -581,7 +581,7 @@ long do_rt_sigreturn(CPUX86State *env)
         goto badframe;
     }
 
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/m68k/signal.c

@@ -400,7 +400,7 @@ long do_rt_sigreturn(CPUM68KState *env)
     if (target_rt_restore_ucontext(env, &frame->uc))
         goto badframe;
 
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/microblaze/signal.c

@@ -209,7 +209,7 @@ long do_rt_sigreturn(CPUMBState *env)
 
     restore_sigcontext(&frame->uc.tuc_mcontext, env);
 
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/mips/signal.c

@@ -368,7 +368,7 @@ long do_rt_sigreturn(CPUMIPSState *env)
     set_sigmask(&blocked);
 
     restore_sigcontext(env, &frame->rs_uc.tuc_mcontext);
-    target_restore_altstack(&frame->rs_uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->rs_uc.tuc_stack, env);
 
     env->active_tc.PC = env->CP0_EPC;
     mips_set_hflags_isa_mode_from_pc(env);

linux-user/nios2/signal.c

@@ -128,7 +128,7 @@ static int rt_restore_ucontext(CPUNios2State *env, struct target_ucontext *uc,
     __get_user(env->regs[R_RA], &gregs[23]);
     __get_user(env->regs[R_SP], &gregs[28]);
 
-    target_restore_altstack(&uc->tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&uc->tuc_stack, env);
 
     *pr2 = env->regs[2];
     return 0;

linux-user/openrisc/signal.c

@@ -158,7 +158,7 @@ long do_rt_sigreturn(CPUOpenRISCState *env)
     set_sigmask(&set);
 
     restore_sigcontext(env, &frame->uc.tuc_mcontext);
-    target_restore_altstack(&frame->uc.tuc_stack, frame_addr);
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return cpu_get_gpr(env, 11);

linux-user/ppc/signal.c

@@ -655,7 +655,7 @@ long do_rt_sigreturn(CPUPPCState *env)
     if (do_setcontext(&rt_sf->uc, env, 1))
         goto sigsegv;
 
-    target_restore_altstack(&rt_sf->uc.tuc_stack, env->gpr[1]);
+    target_restore_altstack(&rt_sf->uc.tuc_stack, env);
 
     unlock_user_struct(rt_sf, rt_sf_addr, 1);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/riscv/signal.c

@@ -192,7 +192,7 @@ long do_rt_sigreturn(CPURISCVState *env)
     }
 
     restore_ucontext(env, &frame->uc);
-    target_restore_altstack(&frame->uc.uc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.uc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/s390x/signal.c

@@ -307,7 +307,7 @@ long do_rt_sigreturn(CPUS390XState *env)
         goto badframe;
     }
 
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/sh4/signal.c

@@ -323,7 +323,7 @@ long do_rt_sigreturn(CPUSH4State *regs)
     set_sigmask(&blocked);
 
     restore_sigcontext(regs, &frame->uc.tuc_mcontext);
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(regs));
+    target_restore_altstack(&frame->uc.tuc_stack, regs);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;

linux-user/signal-common.h

@@ -24,7 +24,7 @@ int on_sig_stack(unsigned long sp);
 int sas_ss_flags(unsigned long sp);
 abi_ulong target_sigsp(abi_ulong sp, struct target_sigaction *ka);
 void target_save_altstack(target_stack_t *uss, CPUArchState *env);
-abi_long target_restore_altstack(target_stack_t *uss, abi_ulong sp);
+abi_long target_restore_altstack(target_stack_t *uss, CPUArchState *env);
 
 static inline void target_sigemptyset(target_sigset_t *set)
 {

linux-user/signal.c

@@ -297,7 +297,7 @@ void target_save_altstack(target_stack_t *uss, CPUArchState *env)
     __put_user(ts->sigaltstack_used.ss_size, &uss->ss_size);
 }
 
-abi_long target_restore_altstack(target_stack_t *uss, abi_ulong sp)
+abi_long target_restore_altstack(target_stack_t *uss, CPUArchState *env)
 {
     TaskState *ts = (TaskState *)thread_cpu->opaque;
     size_t minstacksize = TARGET_MINSIGSTKSZ;
@@ -315,7 +315,7 @@ abi_long target_restore_altstack(target_stack_t *uss, abi_ulong sp)
     __get_user(ss.ss_size, &uss->ss_size);
     __get_user(ss.ss_flags, &uss->ss_flags);
 
-    if (on_sig_stack(sp)) {
+    if (on_sig_stack(get_sp_from_cpustate(env))) {
         return -TARGET_EPERM;
     }
 
@@ -820,7 +820,7 @@ abi_long do_sigaltstack(abi_ulong uss_addr, abi_ulong uoss_addr,
         if (!lock_user_struct(VERIFY_READ, uss, uss_addr, 1)) {
             goto out;
         }
-        ret = target_restore_altstack(uss, get_sp_from_cpustate(env));
+        ret = target_restore_altstack(uss, env);
         if (ret) {
             goto out;
         }

linux-user/xtensa/signal.c

@@ -253,7 +253,7 @@ long do_rt_sigreturn(CPUXtensaState *env)
     set_sigmask(&set);
 
     restore_sigcontext(env, frame);
-    target_restore_altstack(&frame->uc.tuc_stack, get_sp_from_cpustate(env));
+    target_restore_altstack(&frame->uc.tuc_stack, env);
 
     unlock_user_struct(frame, frame_addr, 0);
     return -TARGET_QEMU_ESIGRETURN;