Ard:
I am not sure who remember the detail history. If no one knows it, I suggest
to keep them as-is.
On alignment, do you suggest use ".text 0x1000 : ALIGN(0x1000) {"?
Thanks
Liming
-----Original Message-----
From: Ard Biesheuvel [mailto:ard.biesheu...@linaro.org]
Sent: Tuesday, June 23, 2015 5:17 PM
To: edk2-devel@lists.sourceforge.net
Subject: Re: [edk2] [Patch 3/3] BaseTools: Added GCC ld script to support 4K
alignment.
On 23 June 2015 at 10:19, Yingke Liu <yingke.d....@intel.com> wrote:
> This script can be used to generate 4K aligned ELF file.
>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Yingke Liu <yingke.d....@intel.com>
> ---
> BaseTools/Scripts/gcc-4K-align-ld-script | 44
> ++++++++++++++++++++++++++++++++
> 1 file changed, 44 insertions(+)
> create mode 100644 BaseTools/Scripts/gcc-4K-align-ld-script
>
> diff --git a/BaseTools/Scripts/gcc-4K-align-ld-script
> b/BaseTools/Scripts/gcc-4K-align-ld-script
> new file mode 100644
> index 0000000..1338433
> --- /dev/null
> +++ b/BaseTools/Scripts/gcc-4K-align-ld-script
> @@ -0,0 +1,44 @@
> +/* OUTPUT_FORMAT(efi-bsdrv-x86_64) */ SECTIONS {
> + /* . = 0 + SIZEOF_HEADERS; */
> + . = 0x280;
> + .text ALIGN(0x1000) :
This puts the .text section at a fixed offset of 0x1000, but doesn't annotate
the .text section as being 4K aligned.
You should probably use
.text : ALIGN(0x1000)
here instead. Same below.
However, can you explain why the text section needs the hole here?
Isn't it enough to simply align .data ?
> + {
> + *(.text .stub .text.* .gnu.linkonce.t.*)
> + . = ALIGN(0x20);
> + } =0x90909090
> + .data ALIGN(0x1000) :
> + {
> + *(
> + .rodata .rodata.* .gnu.linkonce.r.*
I realize that this was in the original file that you copied, but could anyone
comment on the reason .rodata was put into the .data section?
> + .data .data.* .gnu.linkonce.d.*
> + .bss .bss.*
> + *COM*
> + )
> + . = ALIGN(0x20);
> + }
> + .eh_frame ALIGN(0x1000) :
> + {
> + KEEP (*(.eh_frame))
> + }
> + .got ALIGN(0x1000) :
> + {
> + *(.got .got.*)
> + . = ALIGN(0x20);
> + }
> + .rela ALIGN(0x1000) :
> + {
> + *(.rela .rela.*)
> + }
> + /DISCARD/ : {
> + *(.note.GNU-stack) *(.gnu_debuglink)
> + *(.interp)
> + *(.dynsym)
> + *(.dynstr)
> + *(.dynamic)
> + *(.hash)
> + *(.comment)
> + }
> +}
> +
> --
> 1.9.5.msysgit.0
>
>
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