diff mbox series

[v4,6/7] tcg/tci: Support raising sigbus for user-only

Message ID 20220104021543.396571-7-richard.henderson@linaro.org
State Superseded
Headers show
Series Unaligned access for user only | expand

Commit Message

Richard Henderson Jan. 4, 2022, 2:15 a.m. UTC 
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/tci.c | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

Comments

Philippe Mathieu-Daudé Jan. 4, 2022, 2:01 p.m. UTC | #1 
On 4/1/22 03:15, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   tcg/tci.c | 20 ++++++++++++++------
>   1 file changed, 14 insertions(+), 6 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
diff mbox series

Patch

diff --git a/tcg/tci.c b/tcg/tci.c
index e76087ccac..92a7c81674 100644
--- a/tcg/tci.c
+++ b/tcg/tci.c
@@ -292,11 +292,11 @@  static bool tci_compare64(uint64_t u0, uint64_t u1, TCGCond condition)
 static uint64_t tci_qemu_ld(CPUArchState *env, target_ulong taddr,
                             MemOpIdx oi, const void *tb_ptr)
 {
-    MemOp mop = get_memop(oi) & (MO_BSWAP | MO_SSIZE);
+    MemOp mop = get_memop(oi);
     uintptr_t ra = (uintptr_t)tb_ptr;
 
 #ifdef CONFIG_SOFTMMU
-    switch (mop) {
+    switch (mop & (MO_BSWAP | MO_SSIZE)) {
     case MO_UB:
         return helper_ret_ldub_mmu(env, taddr, oi, ra);
     case MO_SB:
@@ -326,10 +326,14 @@  static uint64_t tci_qemu_ld(CPUArchState *env, target_ulong taddr,
     }
 #else
     void *haddr = g2h(env_cpu(env), taddr);
+    unsigned a_mask = (1u << get_alignment_bits(mop)) - 1;
     uint64_t ret;
 
     set_helper_retaddr(ra);
-    switch (mop) {
+    if (taddr & a_mask) {
+        helper_unaligned_ld(env, taddr);
+    }
+    switch (mop & (MO_BSWAP | MO_SSIZE)) {
     case MO_UB:
         ret = ldub_p(haddr);
         break;
@@ -377,11 +381,11 @@  static uint64_t tci_qemu_ld(CPUArchState *env, target_ulong taddr,
 static void tci_qemu_st(CPUArchState *env, target_ulong taddr, uint64_t val,
                         MemOpIdx oi, const void *tb_ptr)
 {
-    MemOp mop = get_memop(oi) & (MO_BSWAP | MO_SSIZE);
+    MemOp mop = get_memop(oi);
     uintptr_t ra = (uintptr_t)tb_ptr;
 
 #ifdef CONFIG_SOFTMMU
-    switch (mop) {
+    switch (mop & (MO_BSWAP | MO_SIZE)) {
     case MO_UB:
         helper_ret_stb_mmu(env, taddr, val, oi, ra);
         break;
@@ -408,9 +412,13 @@  static void tci_qemu_st(CPUArchState *env, target_ulong taddr, uint64_t val,
     }
 #else
     void *haddr = g2h(env_cpu(env), taddr);
+    unsigned a_mask = (1u << get_alignment_bits(mop)) - 1;
 
     set_helper_retaddr(ra);
-    switch (mop) {
+    if (taddr & a_mask) {
+        helper_unaligned_st(env, taddr);
+    }
+    switch (mop & (MO_BSWAP | MO_SIZE)) {
     case MO_UB:
         stb_p(haddr, val);
         break;