From 029fb693722ee87cf0aebc75ba823d4ed020215a Mon Sep 17 00:00:00 2001
From: Pavel Labath <labath@google.com>
Date: Tue, 27 Feb 2018 22:14:33 +0000
Subject: [lldb] Use vFlash commands when writing to target's flash memory
 regions

Summary:
When writing an object file over gdb-remote, use the vFlashErase, vFlashWrite, and vFlashDone commands if the write address is in a flash memory region.  A bare metal target may have this kind of setup.

- Update ObjectFileELF to set load addresses using physical addresses.  A typical case may be a data section with a physical address in ROM and a virtual address in RAM, which should be loaded to the ROM address.
- Add support for querying the target's qXfer:memory-map, which contains information about flash memory regions, leveraging MemoryRegionInfo data structures with minor modifications
- Update ProcessGDBRemote to use vFlash commands in DoWriteMemory when the target address is in a flash region

Original discussion at http://lists.llvm.org/pipermail/lldb-dev/2018-January/013093.html

Reviewers: clayborg, labath

Reviewed By: labath

Subscribers: arichardson, emaste, mgorny, lldb-commits

Differential Revision: https://reviews.llvm.org/D42145
Patch by Owen Shaw <llvm@owenpshaw.net>

llvm-svn: 326261
---
 .../gdb_remote_client/TestGDBRemoteLoad.py         | 61 ++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 lldb/packages/Python/lldbsuite/test/functionalities/gdb_remote_client/TestGDBRemoteLoad.py

(limited to 'lldb/packages/Python/lldbsuite/test')

diff --git a/lldb/packages/Python/lldbsuite/test/functionalities/gdb_remote_client/TestGDBRemoteLoad.py b/lldb/packages/Python/lldbsuite/test/functionalities/gdb_remote_client/TestGDBRemoteLoad.py
new file mode 100644
index 00000000000..cce19a3bfa7
--- /dev/null
+++ b/lldb/packages/Python/lldbsuite/test/functionalities/gdb_remote_client/TestGDBRemoteLoad.py
@@ -0,0 +1,61 @@
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+from gdbclientutils import *
+
+
+class TestGDBRemoteLoad(GDBRemoteTestBase):
+
+    def test_ram_load(self):
+        """Test loading an object file to a target's ram"""
+        target = self.createTarget("a.yaml")
+        process = self.connect(target)
+        self.dbg.HandleCommand("target modules load -l -s0")
+        self.assertPacketLogContains([
+                "M1000,4:c3c3c3c3",
+                "M1004,2:3232"
+                ])
+
+    @skipIfXmlSupportMissing
+    def test_flash_load(self):
+        """Test loading an object file to a target's flash memory"""
+
+        class Responder(MockGDBServerResponder):
+            def qSupported(self, client_supported):
+                return "PacketSize=3fff;QStartNoAckMode+;qXfer:memory-map:read+"
+
+            def qXferRead(self, obj, annex, offset, length):
+                if obj == "memory-map":
+                    return (self.MEMORY_MAP[offset:offset + length],
+                            offset + length < len(self.MEMORY_MAP))
+                return None, False
+
+            def other(self, packet):
+                if packet[0:11] == "vFlashErase":
+                    return "OK"
+                if packet[0:11] == "vFlashWrite":
+                    return "OK"
+                if packet == "vFlashDone":
+                    return "OK"
+                return ""
+
+            MEMORY_MAP = """<?xml version="1.0"?>
+<memory-map>
+  <memory type="ram" start="0x0" length="0x1000"/>
+  <memory type="flash" start="0x1000" length="0x1000">
+    <property name="blocksize">0x100</property>
+  </memory>
+  <memory type="ram" start="0x2000" length="0x1D400"/>
+</memory-map>
+"""
+
+        self.server.responder = Responder()
+        target = self.createTarget("a.yaml")
+        process = self.connect(target)
+        self.dbg.HandleCommand("target modules load -l -s0")
+        self.assertPacketLogContains([
+                "vFlashErase:1000,100",
+                "vFlashWrite:1000:\xc3\xc3\xc3\xc3",
+                "vFlashWrite:1004:\x32\x32",
+                "vFlashDone"
+                ])
-- 
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