mirror of https://github.com/acidanthera/audk.git
130 lines
2.8 KiB
Plaintext
130 lines
2.8 KiB
Plaintext
;
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; Copyright (c) 2011, Hewlett-Packard Company. All rights reserved.<BR>
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;
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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LOCAL &maxmem &systbl &memsize
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&memsize=0x20000000 ; default to 512MB
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gosub FindSystemTable &memsize
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ENTRY &systbl
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if &systbl!=0
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(
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print "found system table at &systbl"
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gosub FindDebugInfo &systbl
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)
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else
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(
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print "ERROR: system table not found, check memory size"
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)
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enddo
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FindSystemTable:
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LOCAL &TopOfRam &offset
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ENTRY &TopOfRam
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print "FindSystemTable"
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print "top of mem is &TopOfRam$"
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&offset=&TopOfRam
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; align to highest 4MB boundary
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&offset=&offset&0xFFC00000
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; start at top and look on 4MB boundaries for system table ptr structure
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while &offset>0
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(
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; low signature match
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if Data.Long(a:&offset)==0x20494249
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(
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; high signature match
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if Data.Long(a:&offset+4)==0x54535953
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(
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; less than 4GB?
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if Data.Long(a:&offset+0x0c)==0
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(
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; less than top of ram?
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if Data.Long(a:&offset+8)<&TopOfRam
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(
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return Data.Long(a:&offset+8)
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)
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)
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)
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)
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if &offset<0x400000
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(
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return 0
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)
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&offset=&offset-0x400000
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)
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return 0
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FindDebugInfo:
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LOCAL &SystemTable &CfgTableEntries &ConfigTable &i &offset &dbghdr &dbgentries &dbgptr &dbginfo &loadedimg
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ENTRY &SystemTable
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print "FindDebugInfo"
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&dbgentries=0
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&CfgTableEntries=Data.Long(a:&SystemTable+0x40)
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&ConfigTable=Data.Long(a:&SystemTable+0x44)
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print "config table is at &ConfigTable (&CfgTableEntries entries)"
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; now search for debug info entry with guid 49152E77-1ADA-4764-B7A2-7AFEFED95E8B
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; 0x49152E77 0x47641ADA 0xFE7AA2B7 0x8B5ED9FE
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&i=0
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while &i<&CfgTableEntries
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(
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&offset=&ConfigTable+(&i*0x14)
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if Data.Long(a:&offset)==0x49152E77
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(
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if Data.Long(a:&offset+4)==0x47641ADA
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(
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if Data.Long(a:&offset+8)==0xFE7AA2B7
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(
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if Data.Long(a:&offset+0xc)==0x8B5ED9FE
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(
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&dbghdr=Data.Long(a:&offset+0x10)
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&dbgentries=Data.Long(a:&dbghdr+4)
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&dbgptr=Data.Long(a:&dbghdr+8)
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)
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)
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)
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)
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&i=&i+1
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)
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if &dbgentries==0
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(
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print "no debug entries found"
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return
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)
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print "debug table at &dbgptr (&dbgentries entries)"
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symbol.reset
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&i=0
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while &i<&dbgentries
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(
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&dbginfo=Data.Long(a:&dbgptr+(&i*4))
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if &dbginfo!=0
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(
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if Data.Long(a:&dbginfo)==1 ; normal debug info type
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(
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&loadedimg=Data.Long(a:&dbginfo+4)
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do EfiProcessPeImage Data.Long(a:&loadedimg+0x20)
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)
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)
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&i=&i+1
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)
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return
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