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bsd-user: start to move target CPU functions to target_arch*

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Move the CPU functions into target_arch_cpu.c that are unique to each
CPU. These are defined in target_arch.h.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2021-08-03 17:17:17 -06:00 committed by Warner Losh
parent 01a298a57e
commit e2a7472918
7 changed files with 218 additions and 43 deletions
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31
bsd-user/i386/target_arch.h Normal file
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@ -0,0 +1,31 @@
/*
* Intel x86 specific prototypes for bsd-user
*
* Copyright (c) 2013 Stacey D. Son
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_ARCH_H_
#define _TARGET_ARCH_H_
/* target_arch_cpu.c */
void bsd_i386_write_dt(void *ptr, unsigned long addr, unsigned long limit,
int flags);
void bsd_i386_set_idt(int n, unsigned int dpl);
void bsd_i386_set_idt_base(uint64_t base);
#define target_cpu_set_tls(env, newtls)
#endif /* ! _TARGET_ARCH_H_ */

75
bsd-user/i386/target_arch_cpu.c Normal file
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@ -0,0 +1,75 @@
/*
* i386 cpu related code
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu.h"
#include "qemu/timer.h"
#include "target_arch.h"
static uint64_t *idt_table;
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpu_get_host_ticks();
}
int cpu_get_pic_interrupt(CPUX86State *env)
{
return -1;
}
void bsd_i386_write_dt(void *ptr, unsigned long addr, unsigned long limit,
int flags)
{
unsigned int e1, e2;
uint32_t *p;
e1 = (addr << 16) | (limit & 0xffff);
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
e2 |= flags;
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
}
static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
uint32_t addr, unsigned int sel)
{
uint32_t *p, e1, e2;
e1 = (addr & 0xffff) | (sel << 16);
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
}
/* only dpl matters as we do only user space emulation */
void bsd_i386_set_idt(int n, unsigned int dpl)
{
set_gate(idt_table + n, 0, dpl, 0, 0);
}
void bsd_i386_set_idt_base(uint64_t base)
{
idt_table = g2h_untagged(base);
}

35
bsd-user/main.c
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@ -72,13 +72,6 @@ void gemu_log(const char *fmt, ...)
va_end(ap);
}
#if defined(TARGET_I386)
int cpu_get_pic_interrupt(CPUX86State *env)
{
return -1;
}
#endif
void fork_start(void)
{
}
@ -94,11 +87,6 @@ void fork_end(int child)
/***********************************************************/
/* CPUX86 core interface */
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpu_get_host_ticks();
}
static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
int flags)
{
@ -570,29 +558,6 @@ int main(int argc, char **argv)
*/
guest_base = HOST_PAGE_ALIGN(guest_base);
/*
* Read in mmap_min_addr kernel parameter. This value is used
* When loading the ELF image to determine whether guest_base
* is needed.
*
* When user has explicitly set the quest base, we skip this
* test.
*/
if (!have_guest_base) {
FILE *fp;
fp = fopen("/proc/sys/vm/mmap_min_addr", "r");
if (fp != NULL) {
unsigned long tmp;
if (fscanf(fp, "%lu", &tmp) == 1) {
mmap_min_addr = tmp;
qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n",
mmap_min_addr);
}
fclose(fp);
}
}
if (loader_exec(filename, argv + optind, target_environ, regs, info,
&bprm) != 0) {
printf("Error loading %s\n", filename);

31
bsd-user/x86_64/target_arch.h Normal file
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@ -0,0 +1,31 @@
/*
* Intel x86_64 specific prototypes for bsd-user
*
* Copyright (c) 2013 Stacey D. Son
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TARGET_ARCH_H_
#define _TARGET_ARCH_H_
/* target_arch_cpu.c */
void bsd_x86_64_write_dt(void *ptr, unsigned long addr, unsigned long limit,
int flags);
void bsd_x86_64_set_idt(int n, unsigned int dpl);
void bsd_x86_64_set_idt_base(uint64_t base);
#define target_cpu_set_tls(env, newtls)
#endif /* !_TARGET_ARCH_H_ */

75
bsd-user/x86_64/target_arch_cpu.c Normal file
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@ -0,0 +1,75 @@
/*
* x86_64 cpu related code
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <sys/types.h>
#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu.h"
#include "qemu/timer.h"
#include "target_arch.h"
static uint64_t *idt_table;
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpu_get_host_ticks();
}
int cpu_get_pic_interrupt(CPUX86State *env)
{
return -1;
}
void bsd_x86_64_write_dt(void *ptr, unsigned long addr,
unsigned long limit, int flags)
{
unsigned int e1, e2;
uint32_t *p;
e1 = (addr << 16) | (limit & 0xffff);
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
e2 |= flags;
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
}
static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
uint64_t addr, unsigned int sel)
{
uint32_t *p, e1, e2;
e1 = (addr & 0xffff) | (sel << 16);
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
p = ptr;
p[0] = tswap32(e1);
p[1] = tswap32(e2);
p[2] = tswap32(addr >> 32);
p[3] = 0;
}
/* only dpl matters as we do only user space emulation */
void bsd_x86_64_set_idt(int n, unsigned int dpl)
{
set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
}
void bsd_x86_64_set_idt_base(uint64_t base)
{
idt_table = g2h_untagged(base);
}

7
configure vendored
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@ -721,6 +721,7 @@ GNU/kFreeBSD)
;;
FreeBSD)
bsd="yes"
bsd_user="yes"
make="${MAKE-gmake}"
audio_drv_list="oss try-sdl"
audio_possible_drivers="oss sdl pa"
@ -782,12 +783,6 @@ Linux)
;;
esac
if [ "$bsd" = "yes" ] ; then
if [ "$darwin" != "yes" ] ; then
bsd_user="yes"
fi
fi
: ${make=${MAKE-make}}
# We prefer python 3.x. A bare 'python' is traditionally

7
meson.build
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@ -2569,9 +2569,12 @@ foreach target : target_dirs
if 'CONFIG_LINUX_USER' in config_target
base_dir = 'linux-user'
target_inc += include_directories('linux-user/host/' / config_host['ARCH'])
else
endif
if 'CONFIG_BSD_USER' in config_target
base_dir = 'bsd-user'
target_inc += include_directories('bsd-user/freebsd')
target_inc += include_directories('bsd-user/' / targetos)
dir = base_dir / abi
arch_srcs += files(dir / 'target_arch_cpu.c')
endif
target_inc += include_directories(
base_dir,