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EmbeddedPkg/Scripts/LauterbachT32: Fix EfiLoadDxe.cmm

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There have been many changes since EfiLoadDxe.cmm was last updated in
2011. The EFI_SYSTEM_TABLE can no longer be found by scanning memory on
4KB boundaries, so require users pass in its address instead. Update
various offsets so that the debug information can be found and loaded
with a recent version of TRACE32.

Signed-off-by: Rebecca Cran <rebecca@os.amperecomputing.com>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
This commit is contained in:
Rebecca Cran
2024-01-29 11:59:16 -07:00
committed by mergify[bot]
parent aceb3490a2
commit e59a40b92c
3 changed files with 19 additions and 73 deletions
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77
EmbeddedPkg/Scripts/LauterbachT32/EfiLoadDxe.cmm
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@@ -1,79 +1,22 @@
;
; Copyright (c) 2024, Ampere Computing LLC. All rights reserved.<BR>
; Copyright (c) 2011, Hewlett-Packard Company. All rights reserved.<BR>
;
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
LOCAL &maxmem &systbl &memsize
&memsize=0x20000000 ; default to 512MB
gosub FindSystemTable &memsize
ENTRY &systbl
if &systbl!=0
(
print "found system table at &systbl"
gosub FindDebugInfo &systbl
)
else
(
print "ERROR: system table not found, check memory size"
)
PARAMETERS &systbl
gosub FindDebugInfo &systbl
enddo
FindSystemTable:
LOCAL &TopOfRam &offset
ENTRY &TopOfRam
print "FindSystemTable"
print "top of mem is &TopOfRam$"
&offset=&TopOfRam
; align to highest 4MB boundary
&offset=&offset&0xFFC00000
; start at top and look on 4MB boundaries for system table ptr structure
while &offset>0
(
; low signature match
if Data.Long(a:&offset)==0x20494249
(
; high signature match
if Data.Long(a:&offset+4)==0x54535953
(
; less than 4GB?
if Data.Long(a:&offset+0x0c)==0
(
; less than top of ram?
if Data.Long(a:&offset+8)<&TopOfRam
(
return Data.Long(a:&offset+8)
)
)
)
)
if &offset<0x400000
(
return 0
)
&offset=&offset-0x400000
)
return 0
FindDebugInfo:
LOCAL &SystemTable &CfgTableEntries &ConfigTable &i &offset &dbghdr &dbgentries &dbgptr &dbginfo &loadedimg
ENTRY &SystemTable
print "FindDebugInfo"
&dbgentries=0
&CfgTableEntries=Data.Long(a:&SystemTable+0x40)
&ConfigTable=Data.Long(a:&SystemTable+0x44)
&CfgTableEntries=Data.Long(a:&SystemTable+0x68)
&ConfigTable=Data.Long(a:&SystemTable+0x70)
print "config table is at &ConfigTable (&CfgTableEntries entries)"
@@ -82,7 +25,7 @@ FindDebugInfo:
&i=0
while &i<&CfgTableEntries
(
&offset=&ConfigTable+(&i*0x14)
&offset=&ConfigTable+(&i*0x18)
if Data.Long(a:&offset)==0x49152E77
(
if Data.Long(a:&offset+4)==0x47641ADA
@@ -120,8 +63,10 @@ FindDebugInfo:
(
if Data.Long(a:&dbginfo)==1 ; normal debug info type
(
&loadedimg=Data.Long(a:&dbginfo+4)
do EfiProcessPeImage Data.Long(a:&loadedimg+0x20)
&loadedimg=Data.Long(a:&dbginfo+8)
&imagebaseptr=&loadedimg+0x40
&imagebase=Data.Long(a:&imagebaseptr)
do ~~~~/EfiProcessPeImage.cmm "&imagebase"
)
)
&i=&i+1