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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., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, 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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|
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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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#ifndef TARGET_SPARC64
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case 0x80: |
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#else
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case 0x100: |
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#endif
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syscall_nr = env->gregs[1];
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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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#if defined(TARGET_SPARC64)
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syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG | |
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TARGET_OPENBSD_SYSCALL_G2RFLAG); |
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#endif
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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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} |
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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_SPARC64)
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if (bsd_type == target_openbsd &&
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env->gregs[1] & TARGET_OPENBSD_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 (bsd_type == target_openbsd && |
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env->gregs[1] & TARGET_OPENBSD_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); |
321 |
} |
322 |
} |
323 |
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#endif
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static void usage(void) |
327 |
{ |
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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" |
330 |
"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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349 |
, |
350 |
TARGET_ARCH, |
351 |
interp_prefix, |
352 |
x86_stack_size, |
353 |
DEBUG_LOGFILE); |
354 |
_exit(1);
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} |
356 |
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357 |
THREAD CPUState *thread_env; |
358 |
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359 |
/* Assumes contents are already zeroed. */
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360 |
void init_task_state(TaskState *ts)
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{ |
362 |
int i;
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363 |
|
364 |
ts->used = 1;
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ts->first_free = ts->sigqueue_table; |
366 |
for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { |
367 |
ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
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368 |
} |
369 |
ts->sigqueue_table[i].next = NULL;
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370 |
} |
371 |
|
372 |
int main(int argc, char **argv) |
373 |
{ |
374 |
const char *filename; |
375 |
const char *cpu_model; |
376 |
struct target_pt_regs regs1, *regs = ®s1;
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377 |
struct image_info info1, *info = &info1;
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378 |
TaskState ts1, *ts = &ts1; |
379 |
CPUState *env; |
380 |
int optind;
|
381 |
const char *r; |
382 |
int gdbstub_port = 0; |
383 |
int drop_ld_preload = 0, environ_count = 0; |
384 |
char **target_environ, **wrk, **dst;
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385 |
enum BSDType bsd_type = target_openbsd;
|
386 |
|
387 |
if (argc <= 1) |
388 |
usage(); |
389 |
|
390 |
/* init debug */
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391 |
cpu_set_log_filename(DEBUG_LOGFILE); |
392 |
|
393 |
cpu_model = NULL;
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394 |
optind = 1;
|
395 |
for(;;) {
|
396 |
if (optind >= argc)
|
397 |
break;
|
398 |
r = argv[optind]; |
399 |
if (r[0] != '-') |
400 |
break;
|
401 |
optind++; |
402 |
r++; |
403 |
if (!strcmp(r, "-")) { |
404 |
break;
|
405 |
} else if (!strcmp(r, "d")) { |
406 |
int mask;
|
407 |
const CPULogItem *item;
|
408 |
|
409 |
if (optind >= argc)
|
410 |
break;
|
411 |
|
412 |
r = argv[optind++]; |
413 |
mask = cpu_str_to_log_mask(r); |
414 |
if (!mask) {
|
415 |
printf("Log items (comma separated):\n");
|
416 |
for(item = cpu_log_items; item->mask != 0; item++) { |
417 |
printf("%-10s %s\n", item->name, item->help);
|
418 |
} |
419 |
exit(1);
|
420 |
} |
421 |
cpu_set_log(mask); |
422 |
} else if (!strcmp(r, "s")) { |
423 |
r = argv[optind++]; |
424 |
x86_stack_size = strtol(r, (char **)&r, 0); |
425 |
if (x86_stack_size <= 0) |
426 |
usage(); |
427 |
if (*r == 'M') |
428 |
x86_stack_size *= 1024 * 1024; |
429 |
else if (*r == 'k' || *r == 'K') |
430 |
x86_stack_size *= 1024;
|
431 |
} else if (!strcmp(r, "L")) { |
432 |
interp_prefix = argv[optind++]; |
433 |
} else if (!strcmp(r, "p")) { |
434 |
qemu_host_page_size = atoi(argv[optind++]); |
435 |
if (qemu_host_page_size == 0 || |
436 |
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { |
437 |
fprintf(stderr, "page size must be a power of two\n");
|
438 |
exit(1);
|
439 |
} |
440 |
} else if (!strcmp(r, "g")) { |
441 |
gdbstub_port = atoi(argv[optind++]); |
442 |
} else if (!strcmp(r, "r")) { |
443 |
qemu_uname_release = argv[optind++]; |
444 |
} else if (!strcmp(r, "cpu")) { |
445 |
cpu_model = argv[optind++]; |
446 |
if (strcmp(cpu_model, "?") == 0) { |
447 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
448 |
#if defined(cpu_list)
|
449 |
cpu_list(stdout, &fprintf); |
450 |
#endif
|
451 |
_exit(1);
|
452 |
} |
453 |
} else if (!strcmp(r, "drop-ld-preload")) { |
454 |
drop_ld_preload = 1;
|
455 |
} else if (!strcmp(r, "bsd")) { |
456 |
if (!strcasecmp(argv[optind], "freebsd")) { |
457 |
bsd_type = target_freebsd; |
458 |
} else if (!strcasecmp(argv[optind], "netbsd")) { |
459 |
bsd_type = target_netbsd; |
460 |
} else if (!strcasecmp(argv[optind], "openbsd")) { |
461 |
bsd_type = target_openbsd; |
462 |
} else {
|
463 |
usage(); |
464 |
} |
465 |
optind++; |
466 |
} else if (!strcmp(r, "strace")) { |
467 |
do_strace = 1;
|
468 |
} else
|
469 |
{ |
470 |
usage(); |
471 |
} |
472 |
} |
473 |
if (optind >= argc)
|
474 |
usage(); |
475 |
filename = argv[optind]; |
476 |
|
477 |
/* Zero out regs */
|
478 |
memset(regs, 0, sizeof(struct target_pt_regs)); |
479 |
|
480 |
/* Zero out image_info */
|
481 |
memset(info, 0, sizeof(struct image_info)); |
482 |
|
483 |
/* Scan interp_prefix dir for replacement files. */
|
484 |
init_paths(interp_prefix); |
485 |
|
486 |
if (cpu_model == NULL) { |
487 |
#if defined(TARGET_SPARC)
|
488 |
#ifdef TARGET_SPARC64
|
489 |
cpu_model = "TI UltraSparc II";
|
490 |
#else
|
491 |
cpu_model = "Fujitsu MB86904";
|
492 |
#endif
|
493 |
#else
|
494 |
cpu_model = "any";
|
495 |
#endif
|
496 |
} |
497 |
cpu_exec_init_all(0);
|
498 |
/* NOTE: we need to init the CPU at this stage to get
|
499 |
qemu_host_page_size */
|
500 |
env = cpu_init(cpu_model); |
501 |
if (!env) {
|
502 |
fprintf(stderr, "Unable to find CPU definition\n");
|
503 |
exit(1);
|
504 |
} |
505 |
thread_env = env; |
506 |
|
507 |
if (getenv("QEMU_STRACE")) { |
508 |
do_strace = 1;
|
509 |
} |
510 |
|
511 |
wrk = environ; |
512 |
while (*(wrk++))
|
513 |
environ_count++; |
514 |
|
515 |
target_environ = malloc((environ_count + 1) * sizeof(char *)); |
516 |
if (!target_environ)
|
517 |
abort(); |
518 |
for (wrk = environ, dst = target_environ; *wrk; wrk++) {
|
519 |
if (drop_ld_preload && !strncmp(*wrk, "LD_PRELOAD=", 11)) |
520 |
continue;
|
521 |
*(dst++) = strdup(*wrk); |
522 |
} |
523 |
*dst = NULL; /* NULL terminate target_environ */ |
524 |
|
525 |
if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) { |
526 |
printf("Error loading %s\n", filename);
|
527 |
_exit(1);
|
528 |
} |
529 |
|
530 |
for (wrk = target_environ; *wrk; wrk++) {
|
531 |
free(*wrk); |
532 |
} |
533 |
|
534 |
free(target_environ); |
535 |
|
536 |
log_page_dump(); |
537 |
|
538 |
qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); |
539 |
qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); |
540 |
qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", |
541 |
info->start_code); |
542 |
qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", |
543 |
info->start_data); |
544 |
qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); |
545 |
qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", |
546 |
info->start_stack); |
547 |
qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); |
548 |
qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); |
549 |
|
550 |
target_set_brk(info->brk); |
551 |
syscall_init(); |
552 |
signal_init(); |
553 |
|
554 |
/* build Task State */
|
555 |
memset(ts, 0, sizeof(TaskState)); |
556 |
init_task_state(ts); |
557 |
ts->info = info; |
558 |
env->opaque = ts; |
559 |
|
560 |
#if defined(TARGET_SPARC)
|
561 |
{ |
562 |
int i;
|
563 |
env->pc = regs->pc; |
564 |
env->npc = regs->npc; |
565 |
env->y = regs->y; |
566 |
for(i = 0; i < 8; i++) |
567 |
env->gregs[i] = regs->u_regs[i]; |
568 |
for(i = 0; i < 8; i++) |
569 |
env->regwptr[i] = regs->u_regs[i + 8];
|
570 |
} |
571 |
#else
|
572 |
#error unsupported target CPU
|
573 |
#endif
|
574 |
|
575 |
if (gdbstub_port) {
|
576 |
gdbserver_start (gdbstub_port); |
577 |
gdb_handlesig(env, 0);
|
578 |
} |
579 |
cpu_loop(env, bsd_type); |
580 |
/* never exits */
|
581 |
return 0; |
582 |
} |