add get_file_size function, get size of kernel file in bytes, get number of pages needed for it
This commit is contained in:
rgimad
@@ -67,6 +67,67 @@ endp
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
|
||||
; return in rax file size
|
||||
proc get_file_size uses r12 r13, _root, _name, _file_size
|
||||
mov [_root], rcx
|
||||
mov [_name], rdx
|
||||
mov [_file_size], r8
|
||||
xor r12, r12 ; default return value is 0
|
||||
; mov rbx, [efi_table]
|
||||
|
||||
mov r10, [_root]
|
||||
mov r11, [_name]
|
||||
mov [file_handle], 0 ; to know its empty if open fails
|
||||
fstcall [r10 + EFI_FILE_PROTOCOL.Open], r10, file_handle, r11, EFI_FILE_MODE_READ, 0
|
||||
test eax, eax
|
||||
jnz .error
|
||||
|
||||
; mov rax, rsp
|
||||
; fstcall efi_print_hex_fixed, rax
|
||||
|
||||
mov rcx, [file_handle]
|
||||
mov [buf_size], 0
|
||||
fstcall [rcx + EFI_FILE_PROTOCOL.GetInfo], rcx, fid_guid, buf_size, 0
|
||||
mov rdx, EFI_BUFFER_TOO_SMALL
|
||||
cmp rax, rdx ; TODO how to do with imm?
|
||||
jnz .error ; if error is not EFI_BUFFER_TOO_SMALL then error
|
||||
|
||||
mov r10, [rbx + EFI_SYSTEM_TABLE.BootServices]
|
||||
mov [buf_ptr], 0 ; to know its none if AllocatePool fails
|
||||
fstcall [r10 + EFI_BOOT_SERVICES.AllocatePool], EFI_LOADER_DATA, buf_size, buf_ptr
|
||||
test eax, eax
|
||||
jnz .error
|
||||
|
||||
mov rcx, [file_handle]
|
||||
fstcall [rcx + EFI_FILE_PROTOCOL.GetInfo], rcx, fid_guid, buf_size, [buf_ptr]
|
||||
test eax, eax
|
||||
jnz .error
|
||||
|
||||
mov rcx, [buf_ptr]
|
||||
mov r12, [rcx + EFI_FILE_INFO.FileSize] ; here is the file size
|
||||
jmp .exit
|
||||
|
||||
.error:
|
||||
fstcall efi_puts, msg_get_file_size_error
|
||||
|
||||
.exit:
|
||||
cmp [file_handle], 0
|
||||
jz @f
|
||||
mov rcx, [file_handle]
|
||||
fstcall [rcx + EFI_FILE_PROTOCOL.Close], rcx
|
||||
@@:
|
||||
cmp [buf_ptr], 0
|
||||
jz @f
|
||||
mov r10, [rbx + EFI_SYSTEM_TABLE.BootServices]
|
||||
fstcall [r10 + EFI_BOOT_SERVICES.FreePool], [buf_ptr]
|
||||
@@:
|
||||
mov rax, [_file_size]
|
||||
mov [rax], r12
|
||||
ret
|
||||
endp
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
|
||||
proc main _efi_handle, _efi_table
|
||||
mov [efi_handle], rcx
|
||||
mov [efi_table], rdx
|
||||
@@ -177,7 +238,7 @@ proc main _efi_handle, _efi_table
|
||||
fstcall efi_set_text_color, EFI_LIGHTGRAY
|
||||
|
||||
|
||||
;;;;;;;;;;;;;; loading kernel to memory
|
||||
;;;;;;;;;;;;;;;;; loading kernel to memory
|
||||
mov r10, [rbx + EFI_SYSTEM_TABLE.BootServices]
|
||||
fstcall [r10 + EFI_BOOT_SERVICES.HandleProtocol], [efi_handle], lip_guid, lip_interface
|
||||
test eax, eax
|
||||
@@ -203,12 +264,14 @@ proc main _efi_handle, _efi_table
|
||||
fstcall efi_puts, msg_error_sfsp_openvolume
|
||||
jmp $
|
||||
@@:
|
||||
|
||||
;;;;;;;;;;;;;;;;; read kernel file header
|
||||
fstcall efi_puts, msg_newline
|
||||
; fstcall efi_print_hex_fixed, [volume_root]
|
||||
fstcall efi_puts, msg_reading_kernel_header
|
||||
fstcall load_file, [volume_root], kernel_file_path, kernel_header_buf, 8*5, 0 ; TODO maybe kernel header make as struct => dont hardcode size use sizeof
|
||||
|
||||
fstcall efi_puts, msg_newline
|
||||
; fstcall efi_puts, msg_newline
|
||||
fstcall efi_puts, msg_thisis_kernel_header
|
||||
xor r14, r14
|
||||
@@:
|
||||
@@ -225,11 +288,30 @@ proc main _efi_handle, _efi_table
|
||||
fstcall efi_print_hex_no_lz, [kernel_header_buf + 16]
|
||||
fstcall efi_puts, msg_newline
|
||||
|
||||
;;;;;;;;;;;;;;;;; get the kernel file size
|
||||
fstcall efi_puts, msg_newline
|
||||
fstcall get_file_size, [volume_root], kernel_file_path, kernel_file_size
|
||||
fstcall efi_puts, "kernel file size = "
|
||||
fstcall efi_print_hex_no_lz, [kernel_file_size]
|
||||
fstcall efi_puts, msg_newline
|
||||
|
||||
mov rax, [kernel_file_size]
|
||||
add rax, 4095
|
||||
and rax, -4096 ; round up to next 4k boundary
|
||||
shr rax, 12 ; / 4096
|
||||
mov [kernel_file_size_pages], rax
|
||||
|
||||
fstcall efi_puts, "Number of 4k pages needed for kernel image = "
|
||||
fstcall efi_print_hex_no_lz, [kernel_file_size_pages]
|
||||
fstcall efi_puts, msg_newline
|
||||
|
||||
;; TODO
|
||||
;; read allocpages for kernel code and stack a contignuous range of pages
|
||||
;; allocpages for kernel code and stack a contignuous range of pages
|
||||
;; put phys start / end to kernel header
|
||||
;; read the kernel file to allocated memory
|
||||
;; set kernel rsp, jmp to k64_entry (offset is in kernel header)
|
||||
|
||||
;;;;;;;;;;;;;;;;; test output
|
||||
fstcall efi_set_text_color, EFI_LIGHTGRAY
|
||||
fstcall efi_puts, <"-----------------",0>
|
||||
|
||||
@@ -279,6 +361,7 @@ gop_guid db EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID
|
||||
lip_guid db EFI_LOADED_IMAGE_PROTOCOL_GUID
|
||||
sfsp_guid db EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID
|
||||
pcirbiop_guid db EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GUID
|
||||
fid_guid db EFI_FILE_INFO_ID
|
||||
|
||||
kernel_file_path du '\EFI\KERNEL64.BIN', 0
|
||||
|
||||
@@ -294,6 +377,7 @@ msg_error_open_file du "Error: can't open file ",0
|
||||
msg_error_efi_lip_handle du "efi_handle can't handle LIP",13,10,0
|
||||
msg_error_lip_dev_sfsp du "LIP device handle can't handle SFSP",13,10,0
|
||||
msg_error_sfsp_openvolume du "SFSP OpenVolume failed",13,10,0
|
||||
msg_get_file_size_error du "Error getting file size",13,10,0
|
||||
|
||||
; msg_end_1 du 13,10,"---------- test printing functions:", 13,10,0
|
||||
msg_newline du 13,10,0
|
||||
@@ -321,10 +405,16 @@ e820_typenames:
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
section '.bss' data readable writeable discardable
|
||||
memory_map dq ?
|
||||
volume_root dq ?
|
||||
file_handle dq ?
|
||||
kernel_header_buf dq 4 dup(?)
|
||||
memory_map dq ?
|
||||
volume_root dq ?
|
||||
file_handle dq ? ; for load_file, get_file_size
|
||||
kernel_header_buf dq 4 dup(?)
|
||||
kernel_file_size dq ?
|
||||
kernel_file_size_pages dq ?
|
||||
buf_size dq ? ; for get_file_size
|
||||
buf_ptr dq ? ; for get_file_size
|
||||
|
||||
tmp123 rq 1024
|
||||
|
||||
|
||||
section '.reloc' fixups data discardable
|
||||
|
||||
@@ -80,7 +80,10 @@ EFI_PROTOCOL_ERROR = EFIERR or 24
|
||||
|
||||
|
||||
EFI_FILE_SYSTEM_INFO_ID equ 0x93,0x6e,0x57,0x09,0x3f,0x6d,0xd2,0x11, \
|
||||
0x39,0x8e,0x00,0xa0,0xc9,0x69,0x72,0x3b
|
||||
0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b
|
||||
|
||||
EFI_FILE_INFO_ID equ 0x92,0x6e,0x57,0x09,0x3f,0x6d,0xd2,0x11, \
|
||||
0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b
|
||||
|
||||
EFI_SYSTEM_TABLE_SIGNATURE equ 0x49,0x42,0x49,0x20,0x53,0x59,0x53,0x54
|
||||
|
||||
@@ -155,6 +158,17 @@ struct EFI_FILE_SYSTEM_INFO
|
||||
VolumeLabel rw 32
|
||||
ends
|
||||
|
||||
struct EFI_FILE_INFO
|
||||
Size DQ ?
|
||||
FileSize DQ ?
|
||||
PhysicalSize DQ ?
|
||||
CreateTime rb 16 ; sizeof(EFI_TIME) = 16
|
||||
LastAccessTime rb 16
|
||||
ModificationTime rb 16
|
||||
Attribute DQ ?
|
||||
FileName rw 32 ; but in orig it is FileName []; i.e any size
|
||||
ends
|
||||
|
||||
struct EFI_TABLE_HEADER
|
||||
Signature DQ ?
|
||||
Revision dd ?
|
||||
|
||||
Reference in New Issue
Block a user