diff mbox series

[v2,41/43] windbg: implemented kd_api_search_memory

Message ID 150824596263.6816.4069912549519336456.stgit@Misha-PC.lan02.inno
State New
Headers show
Series Windbg supporting | expand

Commit Message

Mikhail Abakumov Oct. 17, 2017, 1:12 p.m. UTC 
Signed-off-by: Mihail Abakumov <mikhail.abakumov@ispras.ru>
Signed-off-by: Pavel Dovgalyuk <dovgaluk@ispras.ru>
Signed-off-by: Dmitriy Koltunov <koltunov@ispras.ru>
---
 include/exec/windbgstub-utils.h |    1 +
 windbgstub-utils.c              |   33 +++++++++++++++++++++++++++++++++
 windbgstub.c                    |    4 ++++
 3 files changed, 38 insertions(+)
diff mbox series

Patch

diff --git a/include/exec/windbgstub-utils.h b/include/exec/windbgstub-utils.h
index 0199a47343..6c587dadd8 100755
--- a/include/exec/windbgstub-utils.h
+++ b/include/exec/windbgstub-utils.h
@@ -109,6 +109,7 @@  void kd_api_write_physical_memory(CPUState *cpu, PacketData *pd);
 void kd_api_get_version(CPUState *cpu, PacketData *pd);
 void kd_api_read_msr(CPUState *cpu, PacketData *pd);
 void kd_api_write_msr(CPUState *cpu, PacketData *pd);
+void kd_api_search_memory(CPUState *cpu, PacketData *pd);
 void kd_api_unsupported(CPUState *cpu, PacketData *pd);
 
 SizedBuf kd_gen_exception_sc(CPUState *cpu);
diff --git a/windbgstub-utils.c b/windbgstub-utils.c
index 40f859009a..8417de8fb1 100755
--- a/windbgstub-utils.c
+++ b/windbgstub-utils.c
@@ -261,6 +261,39 @@  void kd_api_get_version(CPUState *cpu, PacketData *pd)
     }
 }
 
+void kd_api_search_memory(CPUState *cpu, PacketData *pd)
+{
+    DBGKD_SEARCH_MEMORY *m64c = &pd->m64.u.SearchMemory;
+    int s_len = MAX(ldq_p(&m64c->SearchLength), 1);
+    int p_len = MIN(ldl_p(&m64c->PatternLength), pd->extra_size);
+    target_ulong addr = ldq_p(&m64c->SearchAddress);
+    int size = MIN(s_len, 10);
+    uint8_t mem[size + p_len];
+    int i, err;
+
+    pd->extra_size = 0;
+    pd->m64.ReturnStatus = STATUS_NO_MORE_ENTRIES;
+
+    while (s_len) {
+        err = cpu_memory_rw_debug(cpu, addr, mem, size + p_len, 0);
+        if (!err) {
+            for (i = 0; i < size; ++i) {
+                if (memcmp(mem + i, pd->extra, p_len) == 0) {
+                    stl_p(&m64c->FoundAddress, addr + i);
+                    pd->m64.ReturnStatus = STATUS_SUCCESS;
+                    return;
+                }
+            }
+        } else {
+            WINDBG_DEBUG("search_memory: No physical page mapped: " FMT_ADDR,
+                         addr);
+        }
+        s_len -= size;
+        addr += size;
+        size = MIN(s_len, 10);
+    }
+}
+
 void kd_api_unsupported(CPUState *cpu, PacketData *pd)
 {
     WINDBG_ERROR("Caught unimplemented api %s",
diff --git a/windbgstub.c b/windbgstub.c
index 0268d0818e..d35ff6ba96 100755
--- a/windbgstub.c
+++ b/windbgstub.c
@@ -212,6 +212,10 @@  static void windbg_process_manipulate_packet(ParsingContext *ctx)
     case DbgKdClearAllInternalBreakpointsApi:
         return;
 
+    case DbgKdSearchMemoryApi:
+        kd_api_search_memory(cpu, &ctx->data);
+        break;
+
     default:
         kd_api_unsupported(cpu, &ctx->data);
         break;