eada66b378
Copyright on these files is held by kib@ and/or the Foundation, and both agree to this change. Approved by: kib
86 lines
2.5 KiB
C
86 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 2018 The FreeBSD Foundation
|
|
*
|
|
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
|
|
* under sponsorship from the FreeBSD Foundation.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <machine/specialreg.h>
|
|
#include <machine/cpufunc.h>
|
|
|
|
static void
|
|
crt1_handle_rel(const Elf_Rel *r)
|
|
{
|
|
Elf_Addr *where, target;
|
|
u_int cpuid_supported, p[4];
|
|
uint32_t cpu_feature, cpu_feature2;
|
|
uint32_t cpu_stdext_feature, cpu_stdext_feature2;
|
|
|
|
__asm __volatile(
|
|
" pushfl\n"
|
|
" popl %%eax\n"
|
|
" movl %%eax,%%ecx\n"
|
|
" xorl $0x200000,%%eax\n"
|
|
" pushl %%eax\n"
|
|
" popfl\n"
|
|
" pushfl\n"
|
|
" popl %%eax\n"
|
|
" xorl %%eax,%%ecx\n"
|
|
" je 1f\n"
|
|
" movl $1,%0\n"
|
|
" jmp 2f\n"
|
|
"1: movl $0,%0\n"
|
|
"2:\n"
|
|
: "=r" (cpuid_supported) : : "eax", "ecx", "cc");
|
|
if (cpuid_supported) {
|
|
do_cpuid(1, p);
|
|
cpu_feature = p[3];
|
|
cpu_feature2 = p[2];
|
|
do_cpuid(0, p);
|
|
if (p[0] >= 7) {
|
|
cpuid_count(7, 0, p);
|
|
cpu_stdext_feature = p[1];
|
|
cpu_stdext_feature2 = p[2];
|
|
} else {
|
|
cpu_stdext_feature = 0;
|
|
cpu_stdext_feature2 = 0;
|
|
}
|
|
} else {
|
|
cpu_feature = 0;
|
|
cpu_feature2 = 0;
|
|
cpu_stdext_feature = 0;
|
|
cpu_stdext_feature2 = 0;
|
|
}
|
|
|
|
switch (ELF_R_TYPE(r->r_info)) {
|
|
case R_386_IRELATIVE:
|
|
where = (Elf_Addr *)r->r_offset;
|
|
target = ((Elf_Addr (*)(uint32_t, uint32_t, uint32_t,
|
|
uint32_t))*where)(cpu_feature, cpu_feature2,
|
|
cpu_stdext_feature, cpu_stdext_feature2);
|
|
*where = target;
|
|
break;
|
|
}
|
|
}
|