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Make hex0 one byte smaller.

This commit is contained in:
Andrius Štikonas 2022-10-11 00:59:36 +01:00
parent d518c45e8d
commit dbc06eff76
3 changed files with 11 additions and 14 deletions
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3
amd64/Development/hex0.M1
View File

@ -296,8 +296,7 @@ DEFINE xor_r9,r9 4D31C9
mov_rcx,r12 # arg1 = fin
push !1 # size = 1
mov_rdx,rsp # arg2 = &size
xor_esi,esi # zero rsi
push_rsi # allocate stack
push !0 # allocate stack
mov_r8,rsp # arg3 = &input
push_rax # allocate shadow stack space for UEFI function
push_rax # allocate shadow stack space for UEFI function

3
amd64/Development/hex0.hex2
View File

@ -225,8 +225,7 @@
4C89E1 ; mov_rcx,r12 # arg1 = fin
6A 01 ; push !1 # size = 1
4889E2 ; mov_rdx,rsp # arg2 = &size
31F6 ; xor_esi,esi # zero rsi
56 ; push_rsi # allocate stack
6A 00 ; push !0 # allocate stack
4989E0 ; mov_r8,rsp # arg3 = &input
50 ; push_rax # allocate shadow stack space for UEFI function
50 ; push_rax # allocate shadow stack space for UEFI function

19
amd64/hex0.hex0
View File

@ -128,9 +128,9 @@ F0 00 # SizeOfOptionalHeader
# [0x148]
# Start of section headers
00 00 00 00 00 00 00 00 ; Name of the section (empty) but could set to ".text"
D1 01 00 00 ; VirtualSize
D0 01 00 00 ; VirtualSize
00 10 00 00 ; VirtualAddress
D1 01 00 00 ; SizeOfRawData
D0 01 00 00 ; SizeOfRawData
70 01 00 00 ; PointerToRawData
00 00 00 00 ; PointerToRelocations
00 00 00 00 ; PointerToLinenumbers
@ -148,7 +148,7 @@ D1 01 00 00 ; SizeOfRawData
# Open Loaded Image protocol
4D89F9 ; mov_r9,r15 # arg4 = image_handle
488D15 9D010000 ; lea_rdx,[rip+DWORD] %LOADED_IMAGE_PROTOCOL # guid = &LOADED_IMAGE_PROTOCOL
488D15 9C010000 ; lea_rdx,[rip+DWORD] %LOADED_IMAGE_PROTOCOL # guid = &LOADED_IMAGE_PROTOCOL
4C89C9 ; mov_rcx,r9 # arg1 = image_handle
50 ; push_rax # allocate stack for image
4989E0 ; mov_r8,rsp # arg3 = &image
@ -161,7 +161,7 @@ D1 01 00 00 ; SizeOfRawData
# Get root file system
4D89F9 ; mov_r9,r15 # arg4 = image_handle
488D15 88010000 ; lea_rdx,[rip+DWORD] %SIMPLE_FS_PROTOCOL # guid = &SIMPLE_FS_PROTOCOL
488D15 87010000 ; lea_rdx,[rip+DWORD] %SIMPLE_FS_PROTOCOL # guid = &SIMPLE_FS_PROTOCOL
488B4F 18 ; mov_rcx,[rdi+BYTE] !24 # arg1 = root_device = image->device
4989CD ; mov_r13,rcx # save root_device
50 ; push_rax # allocate stack for rootfs
@ -354,8 +354,7 @@ D1 01 00 00 ; SizeOfRawData
4C89E1 ; mov_rcx,r12 # arg1 = fin
6A 01 ; push !1 # size = 1
4889E2 ; mov_rdx,rsp # arg2 = &size
31F6 ; xor_esi,esi # zero rsi
56 ; push_rsi # allocate stack
6A 00 ; push_rsi # allocate stack
4989E0 ; mov_r8,rsp # arg3 = &input
50 ; push_rax # allocate shadow stack space for UEFI function
50 ; push_rax # allocate shadow stack space for UEFI function
@ -373,7 +372,7 @@ D1 01 00 00 ; SizeOfRawData
C3 ; ret # return
# :terminate [_start+0x161]
# :terminate [_start+0x160]
58 ; pop_rax # remove last return address from stack
5E ; pop_rsi # restore rootdir
415F ; pop_r15 # restore image_handle
@ -406,16 +405,16 @@ D1 01 00 00 ; SizeOfRawData
# Protocol GUIDs
# :LOADED_IMAGE_PROTOCOL [_start+0x1B1]
# :LOADED_IMAGE_PROTOCOL [_start+0x1B0]
A1 31 1B 5B ; %0x5b1b31a1
62 95 ; @0x9562
D2 11 ; @0x11d2
8E 3F 00 A0 C9 69 72 3B ; !0x8e !0x3f !0 !0xa0 !0xc9 !0x69 !0x72 !0x3b
# :SIMPLE_FS_PROTOCOL [_start+0x1C1]
# :SIMPLE_FS_PROTOCOL [_start+0x1C0]
22 5B 4E 96 ; %0x0964e5b22
59 64 ; @0x6459
D2 11 ; @0x11d2
8E 39 00 A0 C9 69 72 3B ; !0x8e !0x39 !0 !0xa0 !0xc9 !0x69 !0x72 !0x3b
# :ELF_end [_start+0x1D1]
# :ELF_end [_start+0x1D0]