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path: root/DuetPkg/BootSector/efi64.S
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Diffstat (limited to 'DuetPkg/BootSector/efi64.S')
-rw-r--r--DuetPkg/BootSector/efi64.S79
1 files changed, 40 insertions, 39 deletions
diff --git a/DuetPkg/BootSector/efi64.S b/DuetPkg/BootSector/efi64.S
index ec6ad89761..34bd7521b9 100644
--- a/DuetPkg/BootSector/efi64.S
+++ b/DuetPkg/BootSector/efi64.S
@@ -59,15 +59,16 @@ Start:
call ClearScreen
# Populate IDT with meaningful offsets for exception handlers...
- sidt Idtr
+ movl $Idtr, %eax
+ sidt (%eax) # get fword address of IDT
- movl Halt, %eax
+ movl $Halt, %eax
movl %eax,%ebx # use bx to copy 15..0 to descriptors
shrl $16,%eax # use ax to copy 31..16 to descriptors
# 63..32 of descriptors is 0
movl $0x78,%ecx # 78h IDT entries to initialize with unique entry points (exceptions)
- movl (Idtr + 2), %esi
+ movl $(Idtr + 2), %esi
movl (%esi),%edi
LOOP_1: # loop through all IDT entries exception handlers and initialize to default handler
@@ -77,7 +78,7 @@ LOOP_1: # loop through all IDT entries e
movw %ax, 6(%edi) # write bits 31..16 of offset
movl $0, 8(%edi) # write bits 31..16 of offset
addl $16, %edi # move up to next descriptor
- addw DEFAULT_HANDLER_SIZE, %bx # move to next entry point
+ addw $DEFAULT_HANDLER_SIZE, %bx # move to next entry point
loopl LOOP_1 # loop back through again until all descriptors are initialized
## at this point edi contains the offset of the descriptor for INT 20
@@ -126,7 +127,7 @@ LOOP_1: # loop through all IDT entries e
movl 0x30(%ebp),%edi # edi = [[22000 + [22014] + 3c] + 2c] = ImageBase (63..32 is zero, ignore)
movl 0x28(%ebp),%eax # eax = [[22000 + [22014] + 3c] + 24] = EntryPoint
addl %edi,%eax # eax = ImageBase + EntryPoint
- movl %ebx, EfiLdrOffset
+ movl $EfiLdrOffset, %ebx
movl %eax, (%ebx) # Modify far jump instruction for correct entry point
movw 6(%ebp), %bx # bx = Number of sections
@@ -158,8 +159,8 @@ SectionLoop:
cmpw $0,%bx
jne SectionLoop
- movl (Idtr), %eax # get size of IDT
- movzx (%edx), %eax
+ movl $Idtr, %edx # get size of IDT
+ movzxw (%edx), %eax
.byte 0xff
.byte 0xc0
# inc eax
@@ -968,7 +969,7 @@ commonIdtEntry:
##
call ClearScreen
- mov String1, %esi
+ movl $String1, %esi
call PrintString
.byte 0x48
movl 16*8(%ebp),%eax ## move Int number into RAX
@@ -977,11 +978,11 @@ commonIdtEntry:
ja PrintDefaultString
PrintExceptionString:
shll $3,%eax ## multiply by 8 to get offset from StringTable to actual string address
- addl StringTable, %eax
+ addl $StringTable, %eax
movl (%eax),%esi
jmp PrintTheString
PrintDefaultString:
- movl IntUnknownString, %esi
+ movl $IntUnknownString, %esi
# patch Int number
movl %eax,%edx
call A2C
@@ -992,7 +993,7 @@ PrintDefaultString:
movb %al,(%esi)
PrintTheString:
call PrintString
- movl String2, %esi
+ movl $String2, %esi
call PrintString
.byte 0x48
movl 19*8(%ebp),%eax # CS
@@ -1003,24 +1004,24 @@ PrintTheString:
.byte 0x48
movl 18*8(%ebp),%eax # RIP
call PrintQword
- movl String3, %esi
+ movl $String3, %esi
call PrintString
movl $0xb8140,%edi
- movl StringRax, %esi
+ movl $StringRax, %esi
call PrintString
.byte 0x48
movl 15*8(%ebp),%eax
call PrintQword
- movl StringRcx, %esi
+ movl $StringRcx, %esi
call PrintString
.byte 0x48
movl 14*8(%ebp),%eax
call PrintQword
- movl StringRdx, %esi
+ movl $StringRdx, %esi
call PrintString
.byte 0x48
movl 13*8(%ebp),%eax
@@ -1028,19 +1029,19 @@ PrintTheString:
movl $0xb81e0,%edi
- movl StringRbx, %esi
+ movl $StringRbx, %esi
call PrintString
.byte 0x48
movl 12*8(%ebp),%eax
call PrintQword
- movl StringRsp, %esi
+ movl $StringRsp, %esi
call PrintString
.byte 0x48
movl 21*8(%ebp),%eax
call PrintQword
- movl StringRbp, %esi
+ movl $StringRbp, %esi
call PrintString
.byte 0x48
movl 10*8(%ebp),%eax
@@ -1048,19 +1049,19 @@ PrintTheString:
movl $0xb8280,%edi
- movl StringRsi, %esi
+ movl $StringRsi, %esi
call PrintString
.byte 0x48
movl 9*8(%ebp),%eax
call PrintQword
- movl StringRdi, %esi
+ movl $StringRdi, %esi
call PrintString
.byte 0x48
movl 8*8(%ebp),%eax
call PrintQword
- movl StringEcode, %esi
+ movl $StringEcode, %esi
call PrintString
.byte 0x48
movl 17*8(%ebp),%eax
@@ -1068,19 +1069,19 @@ PrintTheString:
movl $0xb8320,%edi
- movl StringR8, %esi
+ movl $StringR8, %esi
call PrintString
.byte 0x48
movl 7*8(%ebp),%eax
call PrintQword
- movl StringR9, %esi
+ movl $StringR9, %esi
call PrintString
.byte 0x48
movl 6*8(%ebp),%eax
call PrintQword
- movl StringR10, %esi
+ movl $StringR10, %esi
call PrintString
.byte 0x48
movl 5*8(%ebp),%eax
@@ -1088,19 +1089,19 @@ PrintTheString:
movl $0xb83c0,%edi
- movl StringR11, %esi
+ movl $StringR11, %esi
call PrintString
.byte 0x48
movl 4*8(%ebp),%eax
call PrintQword
- movl StringR12, %esi
+ movl $StringR12, %esi
call PrintString
.byte 0x48
movl 3*8(%ebp),%eax
call PrintQword
- movl StringR13, %esi
+ movl $StringR13, %esi
call PrintString
.byte 0x48
movl 2*8(%ebp),%eax
@@ -1108,19 +1109,19 @@ PrintTheString:
movl $0xb8460,%edi
- movl StringR14, %esi
+ movl $StringR14, %esi
call PrintString
.byte 0x48
movl 1*8(%ebp),%eax
call PrintQword
- movl StringR15, %esi
+ movl $StringR15, %esi
call PrintString
.byte 0x48
movl 0*8(%ebp),%eax
call PrintQword
- movl StringSs, %esi
+ movl $StringSs, %esi
call PrintString
.byte 0x48
movl 22*8(%ebp),%eax
@@ -1128,7 +1129,7 @@ PrintTheString:
movl $0xb8500,%edi
- movl StringRflags, %esi
+ movl $StringRflags, %esi
call PrintString
.byte 0x48
movl 20*8(%ebp),%eax
@@ -1152,7 +1153,7 @@ InnerLoop:
movl (%esi),%eax
call PrintQword
addl $8,%esi
- mov $0x00, %al
+ movb $0x20, %al # blank character
movb %al,(%edi)
addl $2,%edi
loop InnerLoop
@@ -1183,7 +1184,7 @@ InnerLoop1:
movl (%esi),%eax
call PrintQword
addl $8,%esi
- movb $0x00, %al
+ movb $0x20, %al # blank character
movb %al,(%edi)
addl $2,%edi
loop InnerLoop1
@@ -1299,7 +1300,7 @@ ClearScreen:
pushl %eax
pushl %ecx
- movb $0x00, %al
+ movb $0x20, %al # blank character
movb $0xc,%ah
movl $0xb8000,%edi
movl $80*24,%ecx
@@ -1347,11 +1348,11 @@ Int18String: .asciz "12h Machine check -"
Int19String: .asciz "13h SIMD Floating-Point Exception -"
IntUnknownString: .asciz "??h Unknown interrupt -"
-StringTable: .long Int0String, Int1String, Int2String, Int3String, \
- Int4String, Int5String, Int6String, Int7String, \
- Int8String, Int9String, Int10String, Int11String, \
- Int12String, Int13String, Int14String, Int15String,\
- Int16String, Int17String, Int18String, Int19String
+StringTable: .long Int0String, 0, Int1String, 0, Int2String, 0, Int3String, 0, \
+ Int4String, 0, Int5String, 0, Int6String, 0, Int7String, 0, \
+ Int8String, 0, Int9String, 0, Int10String, 0, Int11String, 0, \
+ Int12String, 0, Int13String, 0, Int14String, 0, Int15String, 0, \
+ Int16String, 0, Int17String, 0, Int18String, 0, Int19String, 0
String2: .asciz " HALT!! *** ("
String3: .asciz ")"
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-06 23:01:56 +0000