slirp: fix ICMP handling on macOS hosts

[qemu.git] / memory.c

diff --git a/memory.c b/memory.c
index b3051d99f51883f32ab9aede6e4f44e29524feb1..d852f1143daabe0c47973a55d55c74b456c1edc7 100644 (file)
--- a/memory.c
+++ b/memory.c
@@ -374,6 +374,33 @@ static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
     }
 }
 
+static inline void memory_region_shift_read_access(uint64_t *value,
+                                                   signed shift,
+                                                   uint64_t mask,
+                                                   uint64_t tmp)
+{
+    if (shift >= 0) {
+        *value |= (tmp & mask) << shift;
+    } else {
+        *value |= (tmp & mask) >> -shift;
+    }
+}
+
+static inline uint64_t memory_region_shift_write_access(uint64_t *value,
+                                                        signed shift,
+                                                        uint64_t mask)
+{
+    uint64_t tmp;
+
+    if (shift >= 0) {
+        tmp = (*value >> shift) & mask;
+    } else {
+        tmp = (*value << -shift) & mask;
+    }
+
+    return tmp;
+}
+
 static hwaddr memory_region_to_absolute_addr(MemoryRegion *mr, hwaddr offset)
 {
     MemoryRegion *root;
@@ -396,37 +423,11 @@ static int get_cpu_index(void)
     return -1;
 }
 
-static MemTxResult memory_region_oldmmio_read_accessor(MemoryRegion *mr,
-                                                       hwaddr addr,
-                                                       uint64_t *value,
-                                                       unsigned size,
-                                                       unsigned shift,
-                                                       uint64_t mask,
-                                                       MemTxAttrs attrs)
-{
-    uint64_t tmp;
-
-    tmp = mr->ops->old_mmio.read[ctz32(size)](mr->opaque, addr);
-    if (mr->subpage) {
-        trace_memory_region_subpage_read(get_cpu_index(), mr, addr, tmp, size);
-    } else if (mr == &io_mem_notdirty) {
-        /* Accesses to code which has previously been translated into a TB show
-         * up in the MMIO path, as accesses to the io_mem_notdirty
-         * MemoryRegion. */
-        trace_memory_region_tb_read(get_cpu_index(), addr, tmp, size);
-    } else if (TRACE_MEMORY_REGION_OPS_READ_ENABLED) {
-        hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
-        trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
-    }
-    *value |= (tmp & mask) << shift;
-    return MEMTX_OK;
-}
-
 static MemTxResult  memory_region_read_accessor(MemoryRegion *mr,
                                                 hwaddr addr,
                                                 uint64_t *value,
                                                 unsigned size,
-                                                unsigned shift,
+                                                signed shift,
                                                 uint64_t mask,
                                                 MemTxAttrs attrs)
 {
@@ -444,7 +445,7 @@ static MemTxResult  memory_region_read_accessor(MemoryRegion *mr,
         hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
         trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
     }
-    *value |= (tmp & mask) << shift;
+    memory_region_shift_read_access(value, shift, mask, tmp);
     return MEMTX_OK;
 }
 
@@ -452,7 +453,7 @@ static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
                                                           hwaddr addr,
                                                           uint64_t *value,
                                                           unsigned size,
-                                                          unsigned shift,
+                                                          signed shift,
                                                           uint64_t mask,
                                                           MemTxAttrs attrs)
 {
@@ -471,47 +472,20 @@ static MemTxResult memory_region_read_with_attrs_accessor(MemoryRegion *mr,
         hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
         trace_memory_region_ops_read(get_cpu_index(), mr, abs_addr, tmp, size);
     }
-    *value |= (tmp & mask) << shift;
+    memory_region_shift_read_access(value, shift, mask, tmp);
     return r;
 }
 
-static MemTxResult memory_region_oldmmio_write_accessor(MemoryRegion *mr,
-                                                        hwaddr addr,
-                                                        uint64_t *value,
-                                                        unsigned size,
-                                                        unsigned shift,
-                                                        uint64_t mask,
-                                                        MemTxAttrs attrs)
-{
-    uint64_t tmp;
-
-    tmp = (*value >> shift) & mask;
-    if (mr->subpage) {
-        trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
-    } else if (mr == &io_mem_notdirty) {
-        /* Accesses to code which has previously been translated into a TB show
-         * up in the MMIO path, as accesses to the io_mem_notdirty
-         * MemoryRegion. */
-        trace_memory_region_tb_write(get_cpu_index(), addr, tmp, size);
-    } else if (TRACE_MEMORY_REGION_OPS_WRITE_ENABLED) {
-        hwaddr abs_addr = memory_region_to_absolute_addr(mr, addr);
-        trace_memory_region_ops_write(get_cpu_index(), mr, abs_addr, tmp, size);
-    }
-    mr->ops->old_mmio.write[ctz32(size)](mr->opaque, addr, tmp);
-    return MEMTX_OK;
-}
-
 static MemTxResult memory_region_write_accessor(MemoryRegion *mr,
                                                 hwaddr addr,
                                                 uint64_t *value,
                                                 unsigned size,
-                                                unsigned shift,
+                                                signed shift,
                                                 uint64_t mask,
                                                 MemTxAttrs attrs)
 {
-    uint64_t tmp;
+    uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
 
-    tmp = (*value >> shift) & mask;
     if (mr->subpage) {
         trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
     } else if (mr == &io_mem_notdirty) {
@@ -531,13 +505,12 @@ static MemTxResult memory_region_write_with_attrs_accessor(MemoryRegion *mr,
                                                            hwaddr addr,
                                                            uint64_t *value,
                                                            unsigned size,
-                                                           unsigned shift,
+                                                           signed shift,
                                                            uint64_t mask,
                                                            MemTxAttrs attrs)
 {
-    uint64_t tmp;
+    uint64_t tmp = memory_region_shift_write_access(value, shift, mask);
 
-    tmp = (*value >> shift) & mask;
     if (mr->subpage) {
         trace_memory_region_subpage_write(get_cpu_index(), mr, addr, tmp, size);
     } else if (mr == &io_mem_notdirty) {
@@ -562,7 +535,7 @@ static MemTxResult access_with_adjusted_size(hwaddr addr,
                                                    hwaddr addr,
                                                    uint64_t *value,
                                                    unsigned size,
-                                                   unsigned shift,
+                                                   signed shift,
                                                    uint64_t mask,
                                                    MemTxAttrs attrs),
                                       MemoryRegion *mr,
@@ -1394,16 +1367,12 @@ static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
                                          mr->ops->impl.max_access_size,
                                          memory_region_read_accessor,
                                          mr, attrs);
-    } else if (mr->ops->read_with_attrs) {
+    } else {
         return access_with_adjusted_size(addr, pval, size,
                                          mr->ops->impl.min_access_size,
                                          mr->ops->impl.max_access_size,
                                          memory_region_read_with_attrs_accessor,
                                          mr, attrs);
-    } else {
-        return access_with_adjusted_size(addr, pval, size, 1, 4,
-                                         memory_region_oldmmio_read_accessor,
-                                         mr, attrs);
     }
 }
 
@@ -1475,17 +1444,13 @@ MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
                                          mr->ops->impl.max_access_size,
                                          memory_region_write_accessor, mr,
                                          attrs);
-    } else if (mr->ops->write_with_attrs) {
+    } else {
         return
             access_with_adjusted_size(addr, &data, size,
                                       mr->ops->impl.min_access_size,
                                       mr->ops->impl.max_access_size,
                                       memory_region_write_with_attrs_accessor,
                                       mr, attrs);
-    } else {
-        return access_with_adjusted_size(addr, &data, size, 1, 4,
-                                         memory_region_oldmmio_write_accessor,
-                                         mr, attrs);
     }
 }