diff options
Diffstat (limited to 'src/arch/i386/prefix/libprefix.S')
| -rw-r--r-- | src/arch/i386/prefix/libprefix.S | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/src/arch/i386/prefix/libprefix.S b/src/arch/i386/prefix/libprefix.S index 60dce8e4..7159d745 100644 --- a/src/arch/i386/prefix/libprefix.S +++ b/src/arch/i386/prefix/libprefix.S @@ -199,6 +199,39 @@ print_pci_busdevfn: ret .size print_pci_busdevfn, . - print_pci_busdevfn +/***************************************************************************** + * Utility function: clear current line + * + * Parameters: + * %ds:di : output buffer (or %di=0 to print to console) + * Returns: + * %ds:di : next character in output buffer (if applicable) + ***************************************************************************** + */ + .section ".prefix.lib" + .code16 + .globl print_kill_line +print_kill_line: + /* Preserve registers */ + pushw %ax + pushw %cx + /* Print CR */ + movb $'\r', %al + call print_character + /* Print 79 spaces */ + movb $' ', %al + movw $79, %cx +1: call print_character + loop 1b + /* Print CR */ + movb $'\r', %al + call print_character + /* Restore registers and return */ + popw %cx + popw %ax + ret + .size print_kill_line, . - print_kill_line + /**************************************************************************** * pm_call (real-mode near call) * |