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[prefix] Add .text16.early section

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Add a section .text16.early which is always kept inline with the
prefix.  This will allow for some code sharing between the .prefix and
.text16 sections.

Note that the simple solution of just prepending the .prefix section
to the .text16 section will not work, because a bug in Wyse Streaming
Manager server (WLDRM13.BIN) requires us to place a dummy PXENV+ entry
point at the start of .text16.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-04-20 11:05:53 +01:00
parent 6c35a525da
commit 9068249e24
4 changed files with 150 additions and 39 deletions
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22
src/arch/i386/scripts/i386.lds
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@@ -45,17 +45,25 @@ SECTIONS {
*
*/
.text16 0x0 : AT ( _text16_lma ) {
.text16.early 0x0 : AT ( _text16_early_lma ) {
_text16 = .;
*(.text16.null)
. += 1; /* Prevent NULL being valid */
*(.text16.early)
*(.text16.early.*)
_etext16_early = .;
} .text16.late ALIGN ( _max_align ) : AT ( _text16_late_lma ) {
_text16_late = .;
*(.text16)
*(.text16.*)
_mtext16 = .;
} .bss.text16 (NOLOAD) : AT ( _end_lma ) {
_etext16 = .;
}
_text16_filesz = ABSOLUTE ( _mtext16 - _text16 );
_text16_early_filesz = ABSOLUTE ( _etext16_early - _text16 );
_text16_early_memsz = ABSOLUTE ( _etext16_early - _text16 );
_text16_late_filesz = ABSOLUTE ( _mtext16 - _text16_late );
_text16_late_memsz = ABSOLUTE ( _etext16 - _text16_late );
_text16_memsz = ABSOLUTE ( _etext16 - _text16 );
/*
@@ -168,10 +176,14 @@ SECTIONS {
_prefix_lma = .;
. += _prefix_filesz;
. = ALIGN ( _max_align );
_text16_early_lma = .;
. += _text16_early_filesz;
. = ALIGN ( _max_align );
_payload_lma = .;
_text16_lma = .;
. += _text16_filesz;
_text16_late_lma = .;
. += _text16_late_filesz;
. = ALIGN ( _max_align );
_data16_lma = .;
@@ -194,8 +206,6 @@ SECTIONS {
* Values calculated to save code from doing it
*
*/
_prefix_memsz_pgh = ( ( _prefix_memsz + 15 ) / 16 );
_prefix_memsz_sect = ( ( _prefix_memsz + 511 ) / 512 );
_text16_memsz_pgh = ( ( _text16_memsz + 15 ) / 16 );
_data16_memsz_pgh = ( ( _data16_memsz + 15 ) / 16 );
}