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ipxe
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Prevent NULL from ever pointing to some real code or data. (This was 

causing the serial console to ignore input, because it happened to end up
linked with serial_ischar() at address 0, which core/console.c decided was
invalid).
This commit is contained in:
Michael Brown 2006-12-20 20:28:20 +00:00
parent 6ceaa158da
commit 43d976edd0
2 changed files with 10 additions and 0 deletions
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4
src/arch/i386/scripts/i386-kir.lds
View File

@ -64,6 +64,8 @@ SECTIONS {
. = _text16_link_addr;
_text16 = .;
. += 1; /* Prevent NULL being valid */
.text16 : AT ( _text16_load_offset + __text16 ) {
__text16 = .;
*(.text.null_trap)
@ -80,6 +82,8 @@ SECTIONS {
. = _data16_link_addr;
_data16 = .;
. += 1; /* Prevent NULL being valid */
.rodata16 : AT ( _data16_load_offset + __rodata16 ) {
__rodata16 = .;
*(.rodata16)

6
src/arch/i386/scripts/i386.lds
View File

@ -65,6 +65,8 @@ SECTIONS {
. = _text16_link_addr;
_text16 = .;
. += 1; /* Prevent NULL being valid */
.text16 : AT ( _text16_load_offset + __text16 ) {
__text16 = .;
*(.text16)
@ -78,6 +80,8 @@ SECTIONS {
. = _data16_link_addr;
_data16 = .;
. += 1; /* Prevent NULL being valid */
.rodata16 : AT ( _data16_load_offset + __rodata16 ) {
__rodata16 = .;
*(.rodata16)
@ -115,6 +119,8 @@ SECTIONS {
_text = .;
. += 1; /* Prevent NULL being valid */
.text : AT ( _textdata_load_offset + __text ) {
__text = .;
*(.text.null_trap)