mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-19 18:40:17 +00:00
73774def6b
This patch adds a simple non-driver protection domain sample to serve as an example for defining other non-driver protection domains. It simply performs a ping-pong test of protection domain switching latency during boot, including optional accesses to a private metadata region, and prints out the results.
97 lines
3.5 KiB
Plaintext
97 lines
3.5 KiB
Plaintext
/*
|
|
* Copyright (C) 2015-2016, Intel Corporation. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the copyright holder nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
|
|
* OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
OUTPUT_FORMAT("elf32-i386")
|
|
|
|
ENTRY(start)
|
|
|
|
SECTIONS {
|
|
/*
|
|
OS-Dev Wiki says it is common for kernels to start at 1M. Addresses before that
|
|
are used by BIOS/EFI, the bootloader and memory-mapped I/O.
|
|
|
|
The UEFI GenFw program inserts a 0x220-byte offset between the image base and
|
|
the .text section. We add that same offset here to align the symbols in the
|
|
UEFI DLL with those in the final UEFI binary to make debugging easier. We also
|
|
apply 32-byte alignments to sections rather than more conventional 4K-byte
|
|
alignments to avoid symbols being shifted from the intermediate DLL to the
|
|
final UEFI image as would occur if the GenFw program shifted the .text section
|
|
from a higher, 4K-aligned offset to the 0x220-byte offset from the image base.
|
|
Such shifting may make debugging more difficult by preventing the DLL from
|
|
being a directly-useful source of symbol information. The debugging symbols
|
|
are not included in the final UEFI image. The GenFw program uses a minimum
|
|
section alignment of 32 bytes, so smaller alignment granularities may also
|
|
result in symbol perturbation.
|
|
*/
|
|
. = 1M + 0x220;
|
|
|
|
.text ALIGN (32) :
|
|
{
|
|
KEEP(*(.multiboot))
|
|
*(.boot_text)
|
|
*(.text*)
|
|
}
|
|
|
|
.rodata ALIGN (32) :
|
|
{
|
|
*(.rodata*)
|
|
|
|
_sdata_kern_startup_func = .;
|
|
KEEP(*(.kern_startup_func))
|
|
_edata_kern_startup_func = .;
|
|
|
|
_sdata_shared_isr = .;
|
|
KEEP(*(.shared_isr_data*))
|
|
_edata_shared_isr = .;
|
|
}
|
|
|
|
.data ALIGN (32) :
|
|
{
|
|
*(.data*)
|
|
}
|
|
|
|
.bss ALIGN (32) :
|
|
{
|
|
*(COMMON)
|
|
*(.main_stack)
|
|
*(.bss*)
|
|
|
|
*(.gdt_bss_start)
|
|
/*
|
|
The other GDT-related sections defined in gdt.h are only used when
|
|
protection domain support is enabled. Thus, they do not need to be
|
|
included here.
|
|
*/
|
|
_ebss_gdt_addr = .;
|
|
}
|
|
|
|
_ebss_pre_dma_addr = ALIGN(32);
|
|
}
|