mirror of
https://github.com/Motorhead1991/qemu.git
synced 2025-08-30 05:21:55 -06:00
Preliminary BSD user emulator support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5544 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
blueswir1
parent
46f42f2940
commit
84778508d7
24 changed files with 5943 additions and 1 deletions
576
bsd-user/main.c
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576
bsd-user/main.c
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/*
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* qemu user main
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <machine/trap.h>
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#include "qemu.h"
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#include "qemu-common.h"
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/* For tb_lock */
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#include "exec-all.h"
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#define DEBUG_LOGFILE "/tmp/qemu.log"
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static const char *interp_prefix = CONFIG_QEMU_PREFIX;
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const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
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extern char **environ;
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/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
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we allocate a bigger stack. Need a better solution, for example
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by remapping the process stack directly at the right place */
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unsigned long x86_stack_size = 512 * 1024;
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void gemu_log(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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}
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#ifdef TARGET_SPARC
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#define SPARC64_STACK_BIAS 2047
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//#define DEBUG_WIN
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/* WARNING: dealing with register windows _is_ complicated. More info
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can be found at http://www.sics.se/~psm/sparcstack.html */
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static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
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{
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index = (index + cwp * 16) % (16 * env->nwindows);
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/* wrap handling : if cwp is on the last window, then we use the
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registers 'after' the end */
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if (index < 8 && env->cwp == env->nwindows - 1)
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index += 16 * env->nwindows;
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return index;
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}
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/* save the register window 'cwp1' */
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static inline void save_window_offset(CPUSPARCState *env, int cwp1)
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{
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unsigned int i;
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abi_ulong sp_ptr;
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sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
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#ifdef TARGET_SPARC64
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if (sp_ptr & 3)
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sp_ptr += SPARC64_STACK_BIAS;
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#endif
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#if defined(DEBUG_WIN)
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printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
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sp_ptr, cwp1);
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#endif
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for(i = 0; i < 16; i++) {
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/* FIXME - what to do if put_user() fails? */
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put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
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sp_ptr += sizeof(abi_ulong);
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}
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}
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static void save_window(CPUSPARCState *env)
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{
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#ifndef TARGET_SPARC64
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unsigned int new_wim;
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new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
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((1LL << env->nwindows) - 1);
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save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
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env->wim = new_wim;
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#else
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save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
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env->cansave++;
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env->canrestore--;
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#endif
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}
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static void restore_window(CPUSPARCState *env)
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{
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#ifndef TARGET_SPARC64
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unsigned int new_wim;
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#endif
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unsigned int i, cwp1;
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abi_ulong sp_ptr;
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#ifndef TARGET_SPARC64
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new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
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((1LL << env->nwindows) - 1);
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#endif
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/* restore the invalid window */
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cwp1 = cpu_cwp_inc(env, env->cwp + 1);
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sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
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#ifdef TARGET_SPARC64
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if (sp_ptr & 3)
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sp_ptr += SPARC64_STACK_BIAS;
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#endif
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#if defined(DEBUG_WIN)
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printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
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sp_ptr, cwp1);
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#endif
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for(i = 0; i < 16; i++) {
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/* FIXME - what to do if get_user() fails? */
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get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
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sp_ptr += sizeof(abi_ulong);
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}
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#ifdef TARGET_SPARC64
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env->canrestore++;
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if (env->cleanwin < env->nwindows - 1)
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env->cleanwin++;
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env->cansave--;
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#else
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env->wim = new_wim;
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#endif
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}
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static void flush_windows(CPUSPARCState *env)
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{
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int offset, cwp1;
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offset = 1;
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for(;;) {
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/* if restore would invoke restore_window(), then we can stop */
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cwp1 = cpu_cwp_inc(env, env->cwp + offset);
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#ifndef TARGET_SPARC64
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if (env->wim & (1 << cwp1))
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break;
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#else
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if (env->canrestore == 0)
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break;
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env->cansave++;
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env->canrestore--;
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#endif
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save_window_offset(env, cwp1);
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offset++;
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}
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cwp1 = cpu_cwp_inc(env, env->cwp + 1);
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#ifndef TARGET_SPARC64
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/* set wim so that restore will reload the registers */
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env->wim = 1 << cwp1;
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#endif
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#if defined(DEBUG_WIN)
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printf("flush_windows: nb=%d\n", offset - 1);
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#endif
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}
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void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type)
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{
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int trapnr, ret, syscall_nr;
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//target_siginfo_t info;
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while (1) {
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trapnr = cpu_sparc_exec (env);
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switch (trapnr) {
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case 0x100:
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syscall_nr = env->gregs[1];
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#if defined(TARGET_SPARC)
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syscall_nr &= ~(SYSCALL_G7RFLAG | SYSCALL_G2RFLAG);
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#endif
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if (bsd_type == target_freebsd)
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ret = do_freebsd_syscall(env, syscall_nr,
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env->regwptr[0], env->regwptr[1],
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env->regwptr[2], env->regwptr[3],
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env->regwptr[4], env->regwptr[5]);
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else if (bsd_type == target_netbsd)
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ret = do_netbsd_syscall(env, syscall_nr,
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env->regwptr[0], env->regwptr[1],
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env->regwptr[2], env->regwptr[3],
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env->regwptr[4], env->regwptr[5]);
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else //if (bsd_type == target_openbsd)
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ret = do_openbsd_syscall(env, syscall_nr,
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env->regwptr[0], env->regwptr[1],
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env->regwptr[2], env->regwptr[3],
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env->regwptr[4], env->regwptr[5]);
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if ((unsigned int)ret >= (unsigned int)(-515)) {
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#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
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env->xcc |= PSR_CARRY;
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#else
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env->psr |= PSR_CARRY;
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#endif
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} else {
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#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
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env->xcc &= ~PSR_CARRY;
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#else
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env->psr &= ~PSR_CARRY;
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#endif
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}
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env->regwptr[0] = ret;
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/* next instruction */
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#if defined(TARGET_SPARC)
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if (env->gregs[1] & SYSCALL_G2RFLAG) {
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env->pc = env->gregs[2];
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env->npc = env->pc + 4;
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} else if (env->gregs[1] & SYSCALL_G7RFLAG) {
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env->pc = env->gregs[7];
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env->npc = env->pc + 4;
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} else {
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env->pc = env->npc;
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env->npc = env->npc + 4;
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}
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#else
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env->pc = env->npc;
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env->npc = env->npc + 4;
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#endif
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break;
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case 0x83: /* flush windows */
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#ifdef TARGET_ABI32
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case 0x103:
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#endif
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flush_windows(env);
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/* next instruction */
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env->pc = env->npc;
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env->npc = env->npc + 4;
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break;
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#ifndef TARGET_SPARC64
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case TT_WIN_OVF: /* window overflow */
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save_window(env);
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break;
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case TT_WIN_UNF: /* window underflow */
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restore_window(env);
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break;
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case TT_TFAULT:
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case TT_DFAULT:
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#if 0
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{
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info.si_signo = SIGSEGV;
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info.si_errno = 0;
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/* XXX: check env->error_code */
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info.si_code = TARGET_SEGV_MAPERR;
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info._sifields._sigfault._addr = env->mmuregs[4];
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queue_signal(env, info.si_signo, &info);
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}
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#endif
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break;
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#else
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case TT_SPILL: /* window overflow */
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save_window(env);
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break;
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case TT_FILL: /* window underflow */
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restore_window(env);
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break;
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case TT_TFAULT:
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case TT_DFAULT:
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#if 0
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{
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info.si_signo = SIGSEGV;
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info.si_errno = 0;
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/* XXX: check env->error_code */
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info.si_code = TARGET_SEGV_MAPERR;
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if (trapnr == TT_DFAULT)
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info._sifields._sigfault._addr = env->dmmuregs[4];
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else
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info._sifields._sigfault._addr = env->tsptr->tpc;
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//queue_signal(env, info.si_signo, &info);
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}
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#endif
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break;
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#endif
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case EXCP_INTERRUPT:
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/* just indicate that signals should be handled asap */
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break;
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case EXCP_DEBUG:
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{
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int sig;
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sig = gdb_handlesig (env, TARGET_SIGTRAP);
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#if 0
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if (sig)
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{
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info.si_signo = sig;
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info.si_errno = 0;
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info.si_code = TARGET_TRAP_BRKPT;
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//queue_signal(env, info.si_signo, &info);
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}
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#endif
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}
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break;
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default:
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printf ("Unhandled trap: 0x%x\n", trapnr);
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cpu_dump_state(env, stderr, fprintf, 0);
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exit (1);
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}
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process_pending_signals (env);
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}
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}
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#endif
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static void usage(void)
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{
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printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
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"usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
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"BSD CPU emulator (compiled for %s emulation)\n"
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"\n"
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"Standard options:\n"
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"-h print this help\n"
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"-g port wait gdb connection to port\n"
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"-L path set the elf interpreter prefix (default=%s)\n"
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"-s size set the stack size in bytes (default=%ld)\n"
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"-cpu model select CPU (-cpu ? for list)\n"
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"-drop-ld-preload drop LD_PRELOAD for target process\n"
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"-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
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"\n"
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"Debug options:\n"
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"-d options activate log (logfile=%s)\n"
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"-p pagesize set the host page size to 'pagesize'\n"
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"-strace log system calls\n"
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"\n"
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"Environment variables:\n"
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"QEMU_STRACE Print system calls and arguments similar to the\n"
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" 'strace' program. Enable by setting to any value.\n"
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,
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TARGET_ARCH,
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interp_prefix,
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x86_stack_size,
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DEBUG_LOGFILE);
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_exit(1);
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}
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THREAD CPUState *thread_env;
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/* Assumes contents are already zeroed. */
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void init_task_state(TaskState *ts)
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{
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int i;
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ts->used = 1;
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ts->first_free = ts->sigqueue_table;
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for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
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ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
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}
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ts->sigqueue_table[i].next = NULL;
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}
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int main(int argc, char **argv)
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{
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const char *filename;
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const char *cpu_model;
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struct target_pt_regs regs1, *regs = ®s1;
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struct image_info info1, *info = &info1;
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TaskState ts1, *ts = &ts1;
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CPUState *env;
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int optind;
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const char *r;
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int gdbstub_port = 0;
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int drop_ld_preload = 0, environ_count = 0;
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char **target_environ, **wrk, **dst;
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enum BSDType bsd_type = target_openbsd;
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if (argc <= 1)
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usage();
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/* init debug */
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cpu_set_log_filename(DEBUG_LOGFILE);
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cpu_model = NULL;
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optind = 1;
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for(;;) {
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if (optind >= argc)
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break;
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r = argv[optind];
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if (r[0] != '-')
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break;
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optind++;
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r++;
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if (!strcmp(r, "-")) {
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break;
|
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} else if (!strcmp(r, "d")) {
|
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int mask;
|
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const CPULogItem *item;
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if (optind >= argc)
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break;
|
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r = argv[optind++];
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mask = cpu_str_to_log_mask(r);
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if (!mask) {
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printf("Log items (comma separated):\n");
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for(item = cpu_log_items; item->mask != 0; item++) {
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printf("%-10s %s\n", item->name, item->help);
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}
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exit(1);
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}
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cpu_set_log(mask);
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} else if (!strcmp(r, "s")) {
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r = argv[optind++];
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x86_stack_size = strtol(r, (char **)&r, 0);
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if (x86_stack_size <= 0)
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usage();
|
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if (*r == 'M')
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x86_stack_size *= 1024 * 1024;
|
||||
else if (*r == 'k' || *r == 'K')
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x86_stack_size *= 1024;
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} else if (!strcmp(r, "L")) {
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interp_prefix = argv[optind++];
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} else if (!strcmp(r, "p")) {
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qemu_host_page_size = atoi(argv[optind++]);
|
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if (qemu_host_page_size == 0 ||
|
||||
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
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fprintf(stderr, "page size must be a power of two\n");
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exit(1);
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}
|
||||
} else if (!strcmp(r, "g")) {
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gdbstub_port = atoi(argv[optind++]);
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} else if (!strcmp(r, "r")) {
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qemu_uname_release = argv[optind++];
|
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} else if (!strcmp(r, "cpu")) {
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cpu_model = argv[optind++];
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if (strcmp(cpu_model, "?") == 0) {
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||||
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
||||
#if defined(cpu_list)
|
||||
cpu_list(stdout, &fprintf);
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||||
#endif
|
||||
_exit(1);
|
||||
}
|
||||
} else if (!strcmp(r, "drop-ld-preload")) {
|
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drop_ld_preload = 1;
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} else if (!strcmp(r, "bsd")) {
|
||||
if (!strcasecmp(argv[optind], "freebsd")) {
|
||||
bsd_type = target_freebsd;
|
||||
} else if (!strcasecmp(argv[optind], "netbsd")) {
|
||||
bsd_type = target_netbsd;
|
||||
} else if (!strcasecmp(argv[optind], "openbsd")) {
|
||||
bsd_type = target_openbsd;
|
||||
} else {
|
||||
usage();
|
||||
}
|
||||
optind++;
|
||||
} else if (!strcmp(r, "strace")) {
|
||||
do_strace = 1;
|
||||
} else
|
||||
{
|
||||
usage();
|
||||
}
|
||||
}
|
||||
if (optind >= argc)
|
||||
usage();
|
||||
filename = argv[optind];
|
||||
|
||||
/* Zero out regs */
|
||||
memset(regs, 0, sizeof(struct target_pt_regs));
|
||||
|
||||
/* Zero out image_info */
|
||||
memset(info, 0, sizeof(struct image_info));
|
||||
|
||||
/* Scan interp_prefix dir for replacement files. */
|
||||
init_paths(interp_prefix);
|
||||
|
||||
if (cpu_model == NULL) {
|
||||
#if defined(TARGET_SPARC)
|
||||
#ifdef TARGET_SPARC64
|
||||
cpu_model = "TI UltraSparc II";
|
||||
#else
|
||||
cpu_model = "Fujitsu MB86904";
|
||||
#endif
|
||||
#else
|
||||
cpu_model = "any";
|
||||
#endif
|
||||
}
|
||||
cpu_exec_init_all(0);
|
||||
/* NOTE: we need to init the CPU at this stage to get
|
||||
qemu_host_page_size */
|
||||
env = cpu_init(cpu_model);
|
||||
if (!env) {
|
||||
fprintf(stderr, "Unable to find CPU definition\n");
|
||||
exit(1);
|
||||
}
|
||||
thread_env = env;
|
||||
|
||||
if (getenv("QEMU_STRACE")) {
|
||||
do_strace = 1;
|
||||
}
|
||||
|
||||
wrk = environ;
|
||||
while (*(wrk++))
|
||||
environ_count++;
|
||||
|
||||
target_environ = malloc((environ_count + 1) * sizeof(char *));
|
||||
if (!target_environ)
|
||||
abort();
|
||||
for (wrk = environ, dst = target_environ; *wrk; wrk++) {
|
||||
if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11))
|
||||
continue;
|
||||
*(dst++) = strdup(*wrk);
|
||||
}
|
||||
*dst = NULL; /* NULL terminate target_environ */
|
||||
|
||||
if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
|
||||
printf("Error loading %s\n", filename);
|
||||
_exit(1);
|
||||
}
|
||||
|
||||
for (wrk = target_environ; *wrk; wrk++) {
|
||||
free(*wrk);
|
||||
}
|
||||
|
||||
free(target_environ);
|
||||
|
||||
if (loglevel) {
|
||||
page_dump(logfile);
|
||||
|
||||
fprintf(logfile, "start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
|
||||
fprintf(logfile, "end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
|
||||
fprintf(logfile, "start_code 0x" TARGET_ABI_FMT_lx "\n",
|
||||
info->start_code);
|
||||
fprintf(logfile, "start_data 0x" TARGET_ABI_FMT_lx "\n",
|
||||
info->start_data);
|
||||
fprintf(logfile, "end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
|
||||
fprintf(logfile, "start_stack 0x" TARGET_ABI_FMT_lx "\n",
|
||||
info->start_stack);
|
||||
fprintf(logfile, "brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
|
||||
fprintf(logfile, "entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
|
||||
}
|
||||
|
||||
target_set_brk(info->brk);
|
||||
syscall_init();
|
||||
signal_init();
|
||||
|
||||
/* build Task State */
|
||||
memset(ts, 0, sizeof(TaskState));
|
||||
init_task_state(ts);
|
||||
ts->info = info;
|
||||
env->opaque = ts;
|
||||
env->user_mode_only = 1;
|
||||
|
||||
#if defined(TARGET_SPARC)
|
||||
{
|
||||
int i;
|
||||
env->pc = regs->pc;
|
||||
env->npc = regs->npc;
|
||||
env->y = regs->y;
|
||||
for(i = 0; i < 8; i++)
|
||||
env->gregs[i] = regs->u_regs[i];
|
||||
for(i = 0; i < 8; i++)
|
||||
env->regwptr[i] = regs->u_regs[i + 8];
|
||||
}
|
||||
#else
|
||||
#error unsupported target CPU
|
||||
#endif
|
||||
|
||||
if (gdbstub_port) {
|
||||
gdbserver_start (gdbstub_port);
|
||||
gdb_handlesig(env, 0);
|
||||
}
|
||||
cpu_loop(env, bsd_type);
|
||||
/* never exits */
|
||||
return 0;
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue