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e1a739d15d
* Assembler blocks in non-pure assembler functions must always declare all changed registers * argc is read as *(long*) in C -> changed plongint to pptrint * fixed ident section
126 lines
3.6 KiB
PHP
126 lines
3.6 KiB
PHP
{-
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* Copyright (c) 2018 The FreeBSD Foundation
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*
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* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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}
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//#include <sys/cdefs.h>
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//__FBSDID("$FreeBSD: releng/12.1/lib/csu/amd64/reloc.c 339351 2018-10-13 23:52:55Z kib $");
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//#include <machine/specialreg.h>
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//#include <machine/cpufunc.h>
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Type
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Elf_Addr = uint64;
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PElf_Addr = ^Elf_Addr;
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TElfAddrProc = function (feat1,feat2,stdextfeat1,stdextfeat2:uint32):Elf_Addr; cdecl;
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const R_X86_64_IRELATIVE = 37;
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procedure freebsdIdentTag;nostackframe;assembler;
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asm
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.section ".note.tag", "a"
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.p2align 2
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.long 8
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.long 4
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.long 1
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.asciz "FreeBSD"
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.long 0
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.text
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end;
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function ELF_R_TYPE(info:elf_addr):uint32;inline;
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begin
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ELF_R_TYPE:=info and uint32($ffffffff);
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end;
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{$asmmode intel}
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procedure do_cpuid(funcnr : integer; var p);
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begin
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asm
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mov rax,funcnr
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cpuid
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mov rsi,@p
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mov [rsi],eax
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mov [rsi+4],ebx
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mov [rsi+8],ecx
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mov [rsi+12],edx
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end['rax','rbx','rcx','rdx','rsi'];
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end;
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procedure cpuid_count(funcnr : integer;count:integer;var p);
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begin
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asm
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mov rax,funcnr
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mov rcx,count
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mov rsi,@p
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cpuid
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mov [rsi],eax
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mov [rsi+4],ebx
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mov [rsi+8],ecx
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mov [rsi+12],edx
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end['rax','rbx','rcx','rdx','rsi'];
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end;
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procedure crt1_handle_rela(r : pelf_rela);
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var p : array[0..3] of uint32;
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ptr,
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where : PElf_Addr;
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target : Elf_Addr;
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cpu_feature,
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cpu_feature2 : uint32;
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cpu_stdext_feature,
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cpu_stdext_feature2 : uint32;
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begin
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do_cpuid(1, p);
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cpu_feature := p[3];
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cpu_feature2 := p[2];
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do_cpuid(0, p);
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if (p[0] >= 7) then
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begin
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cpuid_count(7, 0, p);
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cpu_stdext_feature := p[1];
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cpu_stdext_feature2 := p[2];
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end
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else
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begin
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cpu_stdext_feature := 0;
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cpu_stdext_feature2 := 0;
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end;
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case (ELF_R_TYPE(r^.r_info)) of
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R_X86_64_IRELATIVE:
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begin
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ptr := PElf_Addr(r^.r_addend);
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where := PElf_Addr (r^.r_offset);
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target := TElfAddrProc(ptr)(cpu_feature, cpu_feature2,
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cpu_stdext_feature, cpu_stdext_feature2);
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where^:=target;
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end;
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end;
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end;
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