exec: Use cpu_untagged_addr in g2h; split out g2h_untagged

Use g2h_untagged in contexts that have no cpu, e.g. the binary
loaders that operate before the primary cpu is created.  As a
colollary, target_mmap and friends must use untagged addresses,
since they are used by the loaders.

Use g2h_untagged on values returned from target_mmap, as the
kernel never applies a tag itself.

Use g2h_untagged on all pc values.  The only current user of
tags, aarch64, removes tags from code addresses upon branch,
so "pc" is always untagged.

Use g2h with the cpu context on hand wherever possible.

Use g2h_untagged in lock_user, which will be updated soon.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210212184902.1251044-13-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

4 files changed, 6 insertions, 6 deletions

diff --git a/target/arm/helper-a64.c b/target/arm/helper-a64.c
index ae611d7..7f56c78 100644
--- a/target/arm/helper-a64.c
+++ b/target/arm/helper-a64.c
@@ -542,7 +542,7 @@ uint64_t HELPER(paired_cmpxchg64_le)(CPUARMState *env, uint64_t addr,
 
 #ifdef CONFIG_USER_ONLY
     /* ??? Enforce alignment.  */
-    uint64_t *haddr = g2h(addr);
+    uint64_t *haddr = g2h(env_cpu(env), addr);
 
     set_helper_retaddr(ra);
     o0 = ldq_le_p(haddr + 0);
@@ -612,7 +612,7 @@ uint64_t HELPER(paired_cmpxchg64_be)(CPUARMState *env, uint64_t addr,
 
 #ifdef CONFIG_USER_ONLY
     /* ??? Enforce alignment.  */
-    uint64_t *haddr = g2h(addr);
+    uint64_t *haddr = g2h(env_cpu(env), addr);
 
     set_helper_retaddr(ra);
     o1 = ldq_be_p(haddr + 0);
diff --git a/target/hppa/op_helper.c b/target/hppa/op_helper.c
index 7ae31e1..96d9391 100644
--- a/target/hppa/op_helper.c
+++ b/target/hppa/op_helper.c
@@ -63,7 +63,7 @@ static void atomic_store_3(CPUHPPAState *env, target_ulong addr, uint32_t val,
 #ifdef CONFIG_USER_ONLY
     uint32_t old, new, cmp;
 
-    uint32_t *haddr = g2h(addr - 1);
+    uint32_t *haddr = g2h(env_cpu(env), addr - 1);
     old = *haddr;
     while (1) {
         new = (old & ~mask) | (val & mask);
diff --git a/target/i386/tcg/mem_helper.c b/target/i386/tcg/mem_helper.c
index e5cd2de..591f512 100644
--- a/target/i386/tcg/mem_helper.c
+++ b/target/i386/tcg/mem_helper.c
@@ -66,7 +66,7 @@ void helper_cmpxchg8b(CPUX86State *env, target_ulong a0)
 
 #ifdef CONFIG_USER_ONLY
     {
-        uint64_t *haddr = g2h(a0);
+        uint64_t *haddr = g2h(env_cpu(env), a0);
         cmpv = cpu_to_le64(cmpv);
         newv = cpu_to_le64(newv);
         oldv = qatomic_cmpxchg__nocheck(haddr, cmpv, newv);
diff --git a/target/s390x/mem_helper.c b/target/s390x/mem_helper.c
index 1901e9d..25cfede 100644
--- a/target/s390x/mem_helper.c
+++ b/target/s390x/mem_helper.c
@@ -1780,7 +1780,7 @@ static uint32_t do_csst(CPUS390XState *env, uint32_t r3, uint64_t a1,
 
             if (parallel) {
 #ifdef CONFIG_USER_ONLY
-                uint32_t *haddr = g2h(a1);
+                uint32_t *haddr = g2h(env_cpu(env), a1);
                 ov = qatomic_cmpxchg__nocheck(haddr, cv, nv);
 #else
                 TCGMemOpIdx oi = make_memop_idx(MO_TEUL | MO_ALIGN, mem_idx);
@@ -1804,7 +1804,7 @@ static uint32_t do_csst(CPUS390XState *env, uint32_t r3, uint64_t a1,
             if (parallel) {
 #ifdef CONFIG_ATOMIC64
 # ifdef CONFIG_USER_ONLY
-                uint64_t *haddr = g2h(a1);
+                uint64_t *haddr = g2h(env_cpu(env), a1);
                 ov = qatomic_cmpxchg__nocheck(haddr, cv, nv);
 # else
                 TCGMemOpIdx oi = make_memop_idx(MO_TEQ | MO_ALIGN, mem_idx);