andrius
/
stage0-uefi
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

hex0.S: open source file for reading.

This commit is contained in:
Andrius Štikonas 2022-07-15 00:43:57 +01:00
parent 34060fc7e5
commit 159d30e184
1 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
amd64/Development/hex0.S
View File

@ -78,13 +78,13 @@ loop_options2: # Skip argv[1]
add rsp, 72 # deallocate stacks
sub rsp, 32 # allocate stack
lea rdx, [rsp+24] # arg2 = &rootdir
lea rdx, [RootDir] # arg2 = &rootdir
call [rcx+8] # rootfs->open_volume(rootfs, &rootdir)
# Open file for writing
mov rcx, [rsp+24] # arg1 = rootdir
add rsp, 32 # deallocate stack
mov rcx, [RootDir] # arg1 = rootdir
pop r8 # arg3 = out
sub rsp, 48 # allocate stack
lea rdx, [rsp+40] # arg2 = &fout
@ -92,10 +92,20 @@ loop_options2: # Skip argv[1]
mov qword ptr [rsp+32], 0 # arg5 = 0
call [rcx+8] # rootdir->open()
# Open file for reading
mov r12, [rsp+40] # save fout
add rsp, 48 # deallocate stack
pop r8 # in
mov rcx, [RootDir] # arg1 = rootdir
pop r8 # arg3 = in
sub rsp, 48 # allocate stack
lea rdx, [rsp+40] # arg2 = &fin
mov r9, 1 # arg4 = EFI_FILE_MODE_READ
mov qword ptr [rsp+32], 1 # arg5 = EFI_FILE_READ_ONLY
call [rcx+8] # rootdir->open()
mov r13, [rsp+40] # save fin
add rsp, 48 # deallocate stack
Done:
ret
@ -103,6 +113,7 @@ Done:
ImageHandle: .quad 0
SystemBoot: .quad 0
RootDir: .quad 0
# Protocol GUIDs
LOADED_IMAGE_PROTOCOL: