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* amd64: set the correct LMA valuesRoger Pau Monné2015-06-261-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The current linker script generates program headers with VMA == LMA: Entry point 0xffffffff802e7000 There are 6 program headers, starting at offset 64 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align PHDR 0x0000000000000040 0xffffffff80200040 0xffffffff80200040 0x0000000000000150 0x0000000000000150 R E 8 INTERP 0x0000000000000190 0xffffffff80200190 0xffffffff80200190 0x000000000000000d 0x000000000000000d R 1 [Requesting program interpreter: /red/herring] LOAD 0x0000000000000000 0xffffffff80200000 0xffffffff80200000 0x00000000010559b0 0x00000000010559b0 R E 200000 LOAD 0x0000000001056000 0xffffffff81456000 0xffffffff81456000 0x0000000000132638 0x000000000052ecf8 RW 200000 DYNAMIC 0x0000000001056000 0xffffffff81456000 0xffffffff81456000 0x00000000000000d0 0x00000000000000d0 RW 8 GNU_STACK 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 RWE 8 This is fine for the FreeBSD loader, because it completely ignores p_paddr and instead uses p_vaddr with a hardcoded offset. Other loaders however acknowledge p_paddr (like the Xen ELF loader), in which case they will try to load the kernel at the wrong place. Fix this by adding an AT keyword to the first section specifying the physical address, other sections will follow suit, so it ends up looking like: Entry point 0xffffffff802e7000 There are 6 program headers, starting at offset 64 Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flags Align PHDR 0x0000000000000040 0xffffffff80200040 0x0000000000200040 0x0000000000000150 0x0000000000000150 R E 8 INTERP 0x0000000000000190 0xffffffff80200190 0x0000000000200190 0x000000000000000d 0x000000000000000d R 1 [Requesting program interpreter: /red/herring] LOAD 0x0000000000000000 0xffffffff80200000 0x0000000000200000 0x00000000010559b0 0x00000000010559b0 R E 200000 LOAD 0x0000000001056000 0xffffffff81456000 0x0000000001456000 0x0000000000132638 0x000000000052ecf8 RW 200000 DYNAMIC 0x0000000001056000 0xffffffff81456000 0x0000000001456000 0x00000000000000d0 0x00000000000000d0 RW 8 GNU_STACK 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 0x0000000000000000 RWE 8 Tested on bare metal using the native FreeBSD loader and grub2 from TRUEOS. Sponsored by: Citrix Systems R&D Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D2783 Notes: svn path=/head/; revision=284870
* The new binutils has correctly redefined MAXPAGESIZE on amd64 as 0x200000Alan Cox2011-03-281-1/+2
| | | | | | | | | | | | | | | | instead of 0x100000. As a side effect, an amd64 kernel now loads at physical address 0x200000 instead of 0x100000. This is probably for the best because it avoids the use of a 2MB page mapping for the first 1MB of the kernel that also spans the fixed MTRRs. However, getmemsize() still thinks that the kernel loads at 0x100000, and so the physical memory between 0x100000 and 0x200000 is lost. Fix this problem by replacing the hard-wired constant in getmemsize() by a symbol "kernphys" that is defined by the linker script. In collaboration with: kib Notes: svn path=/head/; revision=220090
* Sync sys/conf/ldscript.amd64 with the upstream version, preservingDimitry Andric2010-11-041-35/+81
| | | | | | | | FreeBSD-specific customizations (in particular, the addition of _start_ctors and _stop_ctors). Notes: svn path=/projects/binutils-2.17/; revision=214806
* Binutils commit 0c845abb5a0083c6deebc75975608237015badba increasedDimitry Andric2010-11-041-2/+3
| | | | | | | | | | | | | | | | | | ELF_MAXPAGESIZE for amd64 from 0x00100000 to 0x00200000. This caused the kernel to be incorrectly linked, using the existing linker script, resulting in a virtual address of 0xffffffff80000000 for the LOAD program header. The boot loader will load such a kernel at a real address of 0x00000000, which either causes protection faults in btx, crashes the machine, or (in case of a VMware guest) even makes it power down. :) Fix this by partially synchronizing the amd64 linker script with binutils own updated version, in particular replacing a hardcoded value of 0x00100000 by CONSTANT(MAXPAGESIZE). Notes: svn path=/projects/binutils-2.17/; revision=214799
* Use new output format 'elf64-x86-64-freebsd' instead of 'elf64-x86-64',Dimitry Andric2010-11-011-1/+1
| | | | | | | and similarly 'elf64-sparc-freebsd' instead of 'elf64-sparc'. Notes: svn path=/projects/binutils-2.17/; revision=214647
* Provide the _start_ctors and _stop_ctors symbols. As on i386, the addressesTim J. Robbins2004-05-291-0/+4
| | | | | | | of these are the start and end of the .ctors section. Notes: svn path=/head/; revision=129824
* Sync up with the files in the hammer branch in the p4 tree to get basicPeter Wemm2003-05-011-81/+117
| | | | | | | AMD64 support. There is still more to add. Notes: svn path=/head/; revision=114370
* Add two symbols start_ctors and stop_ctors to allow us to find thePoul-Henning Kamp2003-01-061-0/+4
| | | | | | | .ctors section so we can call the constructors. Notes: svn path=/head/; revision=108777
* Use the new freebsd output format from Binutils 2.13.1.David E. O'Brien2002-10-111-1/+1
| | | | Notes: svn path=/head/; revision=104930
* Remove hard coded magic load address. Now to change the load address,Peter Wemm2001-09-181-1/+1
| | | | | | | | we just have to change the pmap.h constants and ld will automatically adapt based on the "kernbase" symbol. Notes: svn path=/head/; revision=83598
* Add $FreeBSD$Peter Wemm2000-01-111-0/+1
| | | | | | | | Make the alpha linker script more like the i386 version - delete the /usr/local and egcs directories Notes: svn path=/head/; revision=55825
* Remove a rather bogus search path reference..Peter Wemm1999-06-031-1/+1
| | | | Notes: svn path=/head/; revision=47719
* Increased kernel virtual address space to 1GB. NOTE: You MUST have fixedDavid Greenman1999-03-111-1/+1
| | | | | | | | | | | bootblocks in order to boot the kernel after this! Also note that this change breaks BSDI BSD/OS compatibility. Also increased default NKPT to 17 so that FreeBSD can boot on machines with >=2GB of RAM. Booting on machines with exactly 4GB requires other patches, not included. Notes: svn path=/head/; revision=44670
* Make the ELF kernel build produce a dynamic executable (!). This enablesPeter Wemm1998-09-301-0/+128
the in-kernel linker to access the _DYNAMIC data for doing loadable elf modules. The alpha kernel is already done this way, I've borrowed some of the hacks from there. This is primarily aimed at the 3-stage boot process which is intended to be able to do pre-loading of kernel modules. Note that the entry point isn't 0xf0100000 any more, it'll be a little further on - but this value is stored in the headers. I don't think this will be a problem, but I'm sure somebody will tell me if it is. :-) I'm not sure if btxboot is going to like this, it doesn't do proper ELF header checking and assumes that there are exactly two program header entries and that they are both PT_LOAD entries - a bad assumption. Notes: svn path=/head/; revision=39818
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