mirror of
https://github.com/xcat2/xNBA.git
synced 2025-02-13 17:18:12 +00:00
[prefix] Add printing functions to libprefix.S
Move the printing functions from pxeprefix.S into libprefix.S, so they are available for debug from any prefix.
This commit is contained in:
Michael Brown
parent
12f203c606
commit
297002d7bd
@ -43,6 +43,114 @@
|
||||
|
||||
#define CR0_PE 1
|
||||
|
||||
/*****************************************************************************
|
||||
* Utility function: print character (with LF -> LF,CR translation)
|
||||
*
|
||||
* Parameters:
|
||||
* %al : character to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
* Corrupts:
|
||||
* %ax
|
||||
*****************************************************************************
|
||||
*/
|
||||
.section ".prefix.lib"
|
||||
.code16
|
||||
.globl print_character
|
||||
print_character:
|
||||
/* Preserve registers */
|
||||
pushw %bx
|
||||
pushw %bp
|
||||
/* Print character */
|
||||
movw $0x0007, %bx /* page 0, attribute 7 (normal) */
|
||||
movb $0x0e, %ah /* write char, tty mode */
|
||||
cmpb $0x0a, %al /* '\n'? */
|
||||
jne 1f
|
||||
int $0x10
|
||||
movb $0x0d, %al
|
||||
1: int $0x10
|
||||
/* Restore registers and return */
|
||||
popw %bp
|
||||
popw %bx
|
||||
ret
|
||||
.size print_character, . - print_character
|
||||
|
||||
/*****************************************************************************
|
||||
* Utility function: print a NUL-terminated string
|
||||
*
|
||||
* Parameters:
|
||||
* %ds:si : string to print
|
||||
* Returns:
|
||||
* %ds:si : character after terminating NUL
|
||||
*****************************************************************************
|
||||
*/
|
||||
.section ".prefix.lib"
|
||||
.code16
|
||||
.globl print_message
|
||||
print_message:
|
||||
/* Preserve registers */
|
||||
pushw %ax
|
||||
/* Print string */
|
||||
1: lodsb
|
||||
testb %al, %al
|
||||
je 2f
|
||||
call print_character
|
||||
jmp 1b
|
||||
2: /* Restore registers and return */
|
||||
popw %ax
|
||||
ret
|
||||
.size print_message, . - print_message
|
||||
|
||||
/*****************************************************************************
|
||||
* Utility functions: print hex digit/byte/word/dword
|
||||
*
|
||||
* Parameters:
|
||||
* %al (low nibble) : digit to print
|
||||
* %al : byte to print
|
||||
* %ax : word to print
|
||||
* %eax : dword to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
*****************************************************************************
|
||||
*/
|
||||
.section ".prefix.lib"
|
||||
.code16
|
||||
.globl print_hex_dword
|
||||
print_hex_dword:
|
||||
rorl $16, %eax
|
||||
call print_hex_word
|
||||
rorl $16, %eax
|
||||
/* Fall through */
|
||||
.size print_hex_dword, . - print_hex_dword
|
||||
.globl print_hex_word
|
||||
print_hex_word:
|
||||
xchgb %al, %ah
|
||||
call print_hex_byte
|
||||
xchgb %al, %ah
|
||||
/* Fall through */
|
||||
.size print_hex_word, . - print_hex_word
|
||||
.globl print_hex_byte
|
||||
print_hex_byte:
|
||||
rorb $4, %al
|
||||
call print_hex_nibble
|
||||
rorb $4, %al
|
||||
/* Fall through */
|
||||
.size print_hex_byte, . - print_hex_byte
|
||||
.globl print_hex_nibble
|
||||
print_hex_nibble:
|
||||
/* Preserve registers */
|
||||
pushw %ax
|
||||
/* Print digit (technique by Norbert Juffa <norbert.juffa@amd.com> */
|
||||
andb $0x0f, %al
|
||||
cmpb $10, %al
|
||||
sbbb $0x69, %al
|
||||
das
|
||||
call print_character
|
||||
/* Restore registers and return */
|
||||
popw %ax
|
||||
ret
|
||||
.size print_hex_nibble, . - print_hex_nibble
|
||||
|
||||
/****************************************************************************
|
||||
* pm_call (real-mode near call)
|
||||
*
|
||||
|
||||
@ -320,112 +320,6 @@ print_free_basemem:
|
||||
finished:
|
||||
jmp run_etherboot
|
||||
|
||||
/*****************************************************************************
|
||||
* Subroutine: print character (with LF -> LF,CR translation)
|
||||
*
|
||||
* Parameters:
|
||||
* %al : character to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
*****************************************************************************
|
||||
*/
|
||||
print_character:
|
||||
/* Preserve registers */
|
||||
pushw %ax
|
||||
pushw %bx
|
||||
pushw %bp
|
||||
/* Print character */
|
||||
movw $0x0007, %bx /* page 0, attribute 7 (normal) */
|
||||
movb $0x0e, %ah /* write char, tty mode */
|
||||
cmpb $0x0a, %al /* '\n'? */
|
||||
jne 1f
|
||||
int $0x10
|
||||
movb $0x0d, %al
|
||||
1: int $0x10
|
||||
/* Restore registers and return */
|
||||
popw %bp
|
||||
popw %bx
|
||||
popw %ax
|
||||
ret
|
||||
|
||||
/*****************************************************************************
|
||||
* Subroutine: print a NUL-terminated string
|
||||
*
|
||||
* Parameters:
|
||||
* %ds:%si : string to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
*****************************************************************************
|
||||
*/
|
||||
print_message:
|
||||
/* Preserve registers */
|
||||
pushw %ax
|
||||
pushw %si
|
||||
/* Print string */
|
||||
1: lodsb
|
||||
testb %al, %al
|
||||
je 2f
|
||||
call print_character
|
||||
jmp 1b
|
||||
2: /* Restore registers and return */
|
||||
popw %si
|
||||
popw %ax
|
||||
ret
|
||||
|
||||
/*****************************************************************************
|
||||
* Subroutine: print hex digit
|
||||
*
|
||||
* Parameters:
|
||||
* %al (low nibble) : digit to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
*****************************************************************************
|
||||
*/
|
||||
print_hex_nibble:
|
||||
/* Preserve registers */
|
||||
pushw %ax
|
||||
/* Print digit (technique by Norbert Juffa <norbert.juffa@amd.com> */
|
||||
andb $0x0f, %al
|
||||
cmpb $10, %al
|
||||
sbbb $0x69, %al
|
||||
das
|
||||
call print_character
|
||||
/* Restore registers and return */
|
||||
popw %ax
|
||||
ret
|
||||
|
||||
/*****************************************************************************
|
||||
* Subroutine: print hex byte
|
||||
*
|
||||
* Parameters:
|
||||
* %al : byte to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
*****************************************************************************
|
||||
*/
|
||||
print_hex_byte:
|
||||
rorb $4, %al
|
||||
call print_hex_nibble
|
||||
rorb $4, %al
|
||||
call print_hex_nibble
|
||||
ret
|
||||
|
||||
/*****************************************************************************
|
||||
* Subroutine: print hex word
|
||||
*
|
||||
* Parameters:
|
||||
* %ax : word to print
|
||||
* Returns:
|
||||
* Nothing
|
||||
*****************************************************************************
|
||||
*/
|
||||
print_hex_word:
|
||||
xchgb %al, %ah
|
||||
call print_hex_byte
|
||||
xchgb %al, %ah
|
||||
call print_hex_byte
|
||||
ret
|
||||
|
||||
/*****************************************************************************
|
||||
* Subroutine: print segment:offset address
|
||||
*
|
||||
|
||||
@ -180,7 +180,8 @@ gotpmm: /* PMM allocation succeeded: copy ROM to PMM block */
|
||||
/* Shrink ROM and update checksum */
|
||||
xorw %bx, %bx
|
||||
xorw %si, %si
|
||||
movb $_prefix_size_sect, romheader_size
|
||||
movw $_prefix_size_sect, %cx
|
||||
movb %cl, romheader_size
|
||||
shlw $9, %cx
|
||||
1: lodsb
|
||||
addb %al, %bl
|
||||
@ -213,7 +214,7 @@ init_message_pmm_failed:
|
||||
.asciz " (failed)"
|
||||
.size init_message_pmm_failed, . - init_message_pmm_failed
|
||||
init_message_crlf:
|
||||
.asciz "\r\n"
|
||||
.asciz "\n"
|
||||
.size init_message_crlf, . - init_message_crlf
|
||||
|
||||
/* ROM image location
|
||||
@ -309,7 +310,7 @@ exec: /* Set %ds = %cs */
|
||||
.previous
|
||||
|
||||
exec_message:
|
||||
.asciz "gPXE starting boot\r\n"
|
||||
.asciz "gPXE starting boot\n"
|
||||
.size exec_message, . - exec_message
|
||||
|
||||
/* UNDI loader
|
||||
@ -350,22 +351,3 @@ undiloader:
|
||||
popl %esi
|
||||
lret
|
||||
.size undiloader, . - undiloader
|
||||
|
||||
/* Utility function: print string
|
||||
*/
|
||||
print_message:
|
||||
pushw %ax
|
||||
pushw %bx
|
||||
pushw %bp
|
||||
movw $0x0007, %bx
|
||||
1: lodsb
|
||||
testb %al, %al
|
||||
je 2f
|
||||
movb $0x0e, %ah /* write char, tty mode */
|
||||
int $0x10
|
||||
jmp 1b
|
||||
2: popw %bp
|
||||
popw %bx
|
||||
popw %ax
|
||||
ret
|
||||
.size print_message, . - print_message
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user