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ovmf/ovmf-gdb-symbols.patch

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From 263791566fbe25755aebde54c98d5aea061414f3 Mon Sep 17 00:00:00 2001
From: Gary Ching-Pang Lin <glin@suse.com>
Date: Tue, 24 Jun 2014 11:57:32 +0800
Subject: [PATCH 1/3] Add DebugPkg
---
DebugPkg/DebugPkg.dec | 34 ++++
DebugPkg/GdbSyms/GdbSyms.c | 70 +++++++
DebugPkg/GdbSyms/GdbSyms.inf | 57 ++++++
DebugPkg/Scripts/gdb_uefi.py | 348 +++++++++++++++++++++++++++++++++++
4 files changed, 509 insertions(+)
create mode 100644 DebugPkg/DebugPkg.dec
create mode 100644 DebugPkg/GdbSyms/GdbSyms.c
create mode 100644 DebugPkg/GdbSyms/GdbSyms.inf
create mode 100644 DebugPkg/Scripts/gdb_uefi.py
Index: edk2-edk2-stable202302/DebugPkg/DebugPkg.dec
===================================================================
--- /dev/null
+++ edk2-edk2-stable202302/DebugPkg/DebugPkg.dec
@@ -0,0 +1,34 @@
+## @file
+# Debug package - various useful stuff for debugging.
+#
+# Copyright (c) 2006 - 2011, Andrei Warkentin <andreiw@motorola.com>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+ DEC_VERSION = 0x00010005
+ PACKAGE_NAME = DebugPkg
+ PACKAGE_GUID = 2d234f34-50e5-4b9d-b8e3-5562334d87e5
+ PACKAGE_VERSION = 0.1
+
+[Includes]
+ Include
+
+[Guids]
+
+[Protocols]
+
+[PcdsFixedAtBuild]
+
+[PcdsDynamic]
+
+[LibraryClasses]
+
Index: edk2-edk2-stable202302/DebugPkg/GdbSyms/GdbSyms.c
===================================================================
--- /dev/null
+++ edk2-edk2-stable202302/DebugPkg/GdbSyms/GdbSyms.c
@@ -0,0 +1,78 @@
+/** @file
+
+ Bare-minimum GDB symbols needed for reloading symbols.
+
+ This is not a "driver" and should not be placed in a FD.
+
+ Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>
+
+ This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include "PiDxe.h"
+
+#include <Library/UefiLib.h>
+#include <Library/UefiDriverEntryPoint.h>
+#include <Library/BaseLib.h>
+#include <Library/UefiRuntimeLib.h>
+#include <Library/DebugLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/DevicePathLib.h>
+#include <Library/PcdLib.h>
+#include <Guid/DebugImageInfoTable.h>
+
+/**
+ Main entry point.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS Successfully initialized.
+
+**/
+EFI_STATUS
+EFIAPI
+Initialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_SYSTEM_TABLE_POINTER ESTP;
+ EFI_DEBUG_IMAGE_INFO_TABLE_HEADER EDIITH;
+ EFI_IMAGE_DOS_HEADER EIDH;
+ EFI_IMAGE_OPTIONAL_HEADER_UNION EIOHU;
+ EFI_IMAGE_DEBUG_DIRECTORY_ENTRY EIDDE;
+ EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY EIDCNE;
+ EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY EIDCRE;
+ EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY EIDCME;
+ UINTN Dummy =
+ (UINTN) &ESTP |
+ (UINTN) &EDIITH |
+ (UINTN) &EIDH |
+ (UINTN) &EIOHU |
+ (UINTN) &EIDDE |
+ (UINTN) &EIDCNE |
+ (UINTN) &EIDCRE |
+ (UINTN) &EIDCME |
+ 1
+ ;
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &ESTP));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EDIITH));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EIDH));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EIOHU));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EIDDE));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EIDCNE));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EIDCRE));
+ DEBUG ((DEBUG_VERBOSE, "%a: %llx\n", __FUNCTION__, &EIDCME));
+ return !!Dummy & EFI_SUCCESS;
+}
+
+
Index: edk2-edk2-stable202302/DebugPkg/GdbSyms/GdbSyms.inf
===================================================================
--- /dev/null
+++ edk2-edk2-stable202302/DebugPkg/GdbSyms/GdbSyms.inf
@@ -0,0 +1,57 @@
+## @file
+#
+# Bare-minimum GDB symbols needed for reloading symbols.
+#
+# This is not a "driver" and should not be placed in a FD.
+#
+# Copyright (c) 2011, Andrei Warkentin <andreiw@motorola.com>
+#
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = GdbSyms
+ FILE_GUID = 22abcb60-fb40-42ac-b01f-3ab1fad9aad8
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = Initialize
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+# VALID_ARCHITECTURES = IA32 X64 IPF EBC ARM
+#
+
+[Sources]
+ GdbSyms.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ BaseMemoryLib
+ DebugLib
+ DxeServicesTableLib
+ HobLib
+ MemoryAllocationLib
+ PcdLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+ UefiLib
+
+[Guids]
+
+[Protocols]
+
+[Depex]
+ TRUE
+
Index: edk2-edk2-stable202302/DebugPkg/Scripts/gdb_uefi.py
===================================================================
--- /dev/null
+++ edk2-edk2-stable202302/DebugPkg/Scripts/gdb_uefi.py
@@ -0,0 +1,350 @@
+"""
+Allows loading TianoCore symbols into a GDB session attached to EFI
+Firmware.
+
+This is how it works: build GdbSyms - it's a dummy binary that
+contains the relevant symbols needed to find and load image symbols.
+
+$ gdb
+(gdb) taget remote ....
+(gdb) source Scripts/gdb_uefi.py
+(gdb) reload-uefi -o /path/to/GdbSyms.dll
+
+The -o option should be used if you've debugging EFI, where the PE
+images were converted from MACH-O or ELF binaries.
+
+"""
+
+import array
+import getopt
+import binascii
+import re
+
+__license__ = "BSD"
+__version = "1.0.0"
+__maintainer__ = "Andrei Warkentin"
+__email__ = "andrey.warkentin@gmail.com"
+__status__ = "Works"
+
+class ReloadUefi (gdb.Command):
+ """Reload UEFI symbols"""
+
+ #
+ # Various constants.
+ #
+
+ EINVAL = 0xffffffff
+ CV_NB10 = 0x3031424E
+ CV_RSDS = 0x53445352
+ CV_MTOC = 0x434F544D
+ DOS_MAGIC = 0x5A4D
+ PE32PLUS_MAGIC = 0x20b
+ EST_SIGNATURE = 0x5453595320494249L
+ DEBUG_GUID = [0x49152E77, 0x1ADA, 0x4764,
+ [0xB7,0xA2,0x7A,0xFE,
+ 0xFE,0xD9,0x5E, 0x8B]]
+ DEBUG_IS_UPDATING = 0x1
+
+ #
+ # If the images were built as ELF/MACH-O and then converted to PE,
+ # then the base address needs to be offset by PE headers.
+ #
+
+ offset_by_headers = False
+
+ def __init__ (self):
+ super (ReloadUefi, self).__init__ ("reload-uefi", gdb.COMMAND_OBSCURE)
+
+ #
+ # Returns gdb.Type for a type.
+ #
+
+ def type (self, typename):
+ return gdb.lookup_type (typename)
+
+ #
+ # Returns gdb.Type for a pointer to a type.
+ #
+
+ def ptype (self, typename):
+ return gdb.lookup_type (typename).pointer ()
+
+ #
+ # Computes CRC32 on an array of data.
+ #
+
+ def crc32 (self, data):
+ return binascii.crc32 (data) & 0xFFFFFFFF
+
+ #
+ # Sets a field in a struct to a value, i.e.
+ # value->field_name = data.
+ #
+ # Newer Py bindings to Gdb provide access to the inferior
+ # memory, but not all, so have to do it this awkward way.
+ #
+
+ def set_field (self, value, field_name, data):
+ gdb.execute ("set *(%s *) 0x%x = 0x%x" % \
+ (str (value[field_name].type), \
+ long (value[field_name].address), \
+ data))
+
+ #
+ # Returns data backing a gdb.Value as an array.
+ # Same comment as above regarding newer Py bindings...
+ #
+
+ def value_data (self, value, bytes=0):
+ value_address = gdb.Value (value.address)
+ array_t = self.ptype ('UINT8')
+ value_array = value_address.cast (array_t)
+ if bytes == 0:
+ bytes = value.type.sizeof
+ data = array.array ('B')
+ for i in range (0, bytes):
+ data.append (value_array[i])
+ return data
+
+ #
+ # Locates the EFI_SYSTEM_TABLE as per UEFI spec 17.4.
+ # Returns base address or -1.
+ #
+
+ def search_est (self):
+ address = 0
+ estp_t = self.ptype ('EFI_SYSTEM_TABLE_POINTER')
+ while True:
+ estp = gdb.Value(address).cast(estp_t)
+ if estp['Signature'] == self.EST_SIGNATURE:
+ oldcrc = long (estp['Crc32'])
+ self.set_field (estp, 'Crc32', 0)
+ newcrc = self.crc32 (self.value_data (estp.dereference (), 0))
+ self.set_field (estp, 'Crc32', long (oldcrc))
+ if newcrc == oldcrc:
+ return estp['EfiSystemTableBase']
+
+ address = address + 4*1024*1024
+ if long (address) == 0:
+ return gdb.Value(self.EINVAL)
+
+ #
+ # Searches for a vendor-specific configuration table (in EST),
+ # given a vendor-specific table GUID. GUID is a list like -
+ # [32-bit, 16-bit, 16-bit, [8 bytes]]
+ #
+
+ def search_config (self, cfg_table, count, guid):
+ index = 0
+ while index != count:
+ cfg_entry = cfg_table[index]['VendorGuid']
+ if cfg_entry['Data1'] == guid[0] and \
+ cfg_entry['Data2'] == guid[1] and \
+ cfg_entry['Data3'] == guid[2] and \
+ self.value_data (cfg_entry['Data4']).tolist () == guid[3]:
+ return cfg_table[index]['VendorTable']
+ index = index + 1
+ return gdb.Value(self.EINVAL)
+
+ #
+ # Returns a UTF16 string corresponding to a (CHAR16 *) value in EFI.
+ #
+
+ def parse_utf16 (self, value):
+ index = 0
+ data = array.array ('H')
+ while value[index] != 0:
+ data.append (value[index])
+ index = index + 1
+ return data.tostring ().decode ('utf-16')
+
+ #
+ # Returns offset of a field within structure. Useful
+ # for getting container of a structure.
+ #
+
+ def offsetof (self, typename, field):
+ t = gdb.Value (0).cast (self.ptype (typename))
+ return long (t[field].address)
+
+ #
+ # Returns sizeof of a type.
+ #
+
+ def sizeof (self, typename):
+ return self.type (typename).sizeof
+
+ #
+ # Returns the EFI_IMAGE_NT_HEADERS32 pointer, given
+ # an ImageBase address as a gdb.Value.
+ #
+
+ def pe_headers (self, imagebase):
+ dosh_t = self.ptype ('EFI_IMAGE_DOS_HEADER')
+ head_t = self.ptype ('EFI_IMAGE_OPTIONAL_HEADER_UNION')
+ dosh = imagebase.cast(dosh_t)
+ h_addr = imagebase
+ if dosh['e_magic'] == self.DOS_MAGIC:
+ h_addr = h_addr + dosh['e_lfanew']
+ return gdb.Value(h_addr).cast (head_t)
+
+ #
+ # Returns True if pe_headers refer to a PE32+ image.
+ #
+
+ def pe_is_64 (self, pe_headers):
+ if pe_headers['Pe32']['OptionalHeader']['Magic'] == self.PE32PLUS_MAGIC:
+ return True
+ return False
+
+ #
+ # Returns the PE (not so) optional header.
+ #
+
+ def pe_optional (self, pe):
+ if self.pe_is_64 (pe):
+ return pe['Pe32Plus']['OptionalHeader']
+ else:
+ return pe['Pe32']['OptionalHeader']
+
+ #
+ # Returns the symbol file name for a PE image.
+ #
+
+ def pe_parse_debug (self, pe):
+ opt = self.pe_optional (pe)
+ debug_dir_entry = opt['DataDirectory'][6]
+ dep = debug_dir_entry['VirtualAddress'] + opt['ImageBase']
+ dep = dep.cast (self.ptype ('EFI_IMAGE_DEBUG_DIRECTORY_ENTRY'))
+ cvp = dep.dereference ()['RVA'] + opt['ImageBase']
+ cvv = cvp.cast(self.ptype ('UINT32')).dereference ()
+ if cvv == self.CV_NB10:
+ return cvp + self.sizeof('EFI_IMAGE_DEBUG_CODEVIEW_NB10_ENTRY')
+ elif cvv == self.CV_RSDS:
+ return cvp + self.sizeof('EFI_IMAGE_DEBUG_CODEVIEW_RSDS_ENTRY')
+ elif cvv == self.CV_MTOC:
+ return cvp + self.sizeof('EFI_IMAGE_DEBUG_CODEVIEW_MTOC_ENTRY')
+ return gdb.Value(self.EINVAL)
+
+ #
+ # Parses an EFI_LOADED_IMAGE_PROTOCOL, figuring out the symbol file name.
+ # This file name is then appended to list of loaded symbols.
+ #
+ # TBD: Support TE images.
+ #
+
+ def parse_image (self, image, syms):
+ base = image['ImageBase']
+ pe = self.pe_headers (base)
+ opt = self.pe_optional (pe)
+ sym_name = self.pe_parse_debug (pe)
+
+ # For ELF and Mach-O-derived images...
+ if self.offset_by_headers:
+ base = base + opt['SizeOfHeaders']
+ if sym_name != self.EINVAL:
+ sym_name = sym_name.cast (self.ptype('CHAR8')).string ()
+ sym_name = re.sub(r"\.dll$", ".debug", sym_name)
+ syms.append ("add-symbol-file %s 0x%x" % \
+ (sym_name,
+ long (base)))
+
+ #
+ # Parses table EFI_DEBUG_IMAGE_INFO structures, builds
+ # a list of add-symbol-file commands, and reloads debugger
+ # symbols.
+ #
+
+ def parse_edii (self, edii, count):
+ index = 0
+ syms = []
+ while index != count:
+ entry = edii[index]
+ if entry['ImageInfoType'].dereference () == 1:
+ entry = entry['NormalImage']
+ self.parse_image(entry['LoadedImageProtocolInstance'], syms)
+ else:
+ print "Skipping unknown EFI_DEBUG_IMAGE_INFO (Type 0x%x)" % \
+ entry['ImageInfoType'].dereference ()
+ index = index + 1
+ gdb.execute ("symbol-file")
+ print "Loading new symbols..."
+ for sym in syms:
+ print sym
+ gdb.execute (sym)
+
+ #
+ # Parses EFI_DEBUG_IMAGE_INFO_TABLE_HEADER, in order to load
+ # image symbols.
+ #
+
+ def parse_dh (self, dh):
+ dh_t = self.ptype ('EFI_DEBUG_IMAGE_INFO_TABLE_HEADER')
+ dh = dh.cast (dh_t)
+ print "DebugImageInfoTable @ 0x%x, 0x%x entries" \
+ % (long (dh['EfiDebugImageInfoTable']), dh['TableSize'])
+ if dh['UpdateStatus'] & self.DEBUG_IS_UPDATING:
+ print "EfiDebugImageInfoTable update in progress, retry later"
+ return
+ self.parse_edii (dh['EfiDebugImageInfoTable'], dh['TableSize'])
+
+ #
+ # Parses EFI_SYSTEM_TABLE, in order to load image symbols.
+ #
+
+ def parse_est (self, est):
+ est_t = self.ptype ('EFI_SYSTEM_TABLE')
+ est = est.cast (est_t)
+ print "Connected to %s (Rev. 0x%x)" % \
+ (self.parse_utf16 (est['FirmwareVendor']), \
+ long (est['FirmwareRevision']))
+ print "ConfigurationTable @ 0x%x, 0x%x entries" \
+ % (long (est['ConfigurationTable']), est['NumberOfTableEntries'])
+
+ dh = self.search_config(est['ConfigurationTable'],
+ est['NumberOfTableEntries'],
+ self.DEBUG_GUID)
+ if dh == self.EINVAL:
+ print "No EFI_DEBUG_IMAGE_INFO_TABLE_HEADER"
+ return
+ self.parse_dh (dh)
+
+ #
+ # Usage information.
+ #
+
+ def usage (self):
+ print "Usage: reload-uefi [-o] /path/to/GdbSyms.dll"
+
+ #
+ # Handler for reload-uefi.
+ #
+
+ def invoke (self, arg, from_tty):
+ args = arg.split(' ')
+ try:
+ opts, args = getopt.getopt(args, "o", ["offset-by-headers"])
+ except getopt.GetoptError, err:
+ self.usage ()
+ return
+ for opt, arg in opts:
+ if opt == "-o":
+ self.offset_by_headers = True
+
+ if len(args) < 1:
+ self.usage ()
+ return
+
+ gdb.execute ("symbol-file")
+ gdb.execute ("symbol-file %s" % args[0])
+ est = self.search_est ()
+ if est == self.EINVAL:
+ print "No EFI_SYSTEM_TABLE..."
+ return
+
+ print "EFI_SYSTEM_TABLE @ 0x%x" % est
+ self.parse_est (est)
+
+ReloadUefi ()
+
+
Index: edk2-edk2-stable202302/OvmfPkg/OvmfPkgX64.dsc
===================================================================
--- edk2-edk2-stable202302.orig/OvmfPkg/OvmfPkgX64.dsc
+++ edk2-edk2-stable202302/OvmfPkg/OvmfPkgX64.dsc
@@ -1123,3 +1123,5 @@
# TPM support
#
!include OvmfPkg/Include/Dsc/OvmfTpmComponentsDxe.dsc.inc
+
+ DebugPkg/GdbSyms/GdbSyms.inf
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