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| author | H. Peter Anvin <hpa@zytor.com> | 2010-02-24 11:14:04 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2010-02-24 11:14:04 -0800 |
| commit | a2656772d030444ee1e2bdd289d3726edcf2d741 (patch) | |
| tree | ae95480e57bdf09238cadb873f5d773f2dfee926 /core/syslinux.ld | |
| parent | e0e20f0ab948e372444c748ffbef65a30aafe4f8 (diff) | |
| download | syslinux-a2656772d030444ee1e2bdd289d3726edcf2d741.tar.gz | |
core: move aligned segments earlier
Move the aligned segments downward, to provide for the largest
possible contiguous lowmem heap. This minimizes the necessary lowmem
footprint. (Note: the heap doesn't actually need to be contiguous,
but having it not be makes it harder to size.)
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'core/syslinux.ld')
| -rw-r--r-- | core/syslinux.ld | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/core/syslinux.ld b/core/syslinux.ld index 6c7cd974..fd5c5fe6 100644 --- a/core/syslinux.ld +++ b/core/syslinux.ld @@ -196,8 +196,24 @@ SECTIONS __assert_end16 = ASSERT(_end16 <= 0x10000, "64K overflow"); /* - * The auxilliary data segment is allowed to spill out of the - * low 64K. + * Special 16-bit segments + */ + + . = ALIGN(65536); + .real_mode (NOLOAD) : { + *(.real_mode) + } + real_mode_seg = core_real_mode >> 4; + + . = ALIGN(65536); + .xfer_buf (NOLOAD) : { + *(.xfer_buf) + } + xfer_buf_seg = core_xfer_buf >> 4; + + /* + * The auxilliary data segment is used by the 16-bit code + * for items that don't need to live in the bottom 64K. */ . = ALIGN(16); @@ -226,21 +242,6 @@ SECTIONS __high_clear_len = __high_clear_end - __high_clear_start; __high_clear_dwords = (__high_clear_len + 3) >> 2; - /* - * Special 16-bit segments - */ - . = ALIGN(65536); - .real_mode (NOLOAD) : { - *(.real_mode) - } - real_mode_seg = core_real_mode >> 4; - - . = ALIGN(65536); - .xfer_buf (NOLOAD) : { - *(.xfer_buf) - } - xfer_buf_seg = core_xfer_buf >> 4; - /* Start of the lowmem heap */ __lowmem_heap = .; |