| version 1.7, 2004/01/23 14:33:26 | version 1.18, 2008/01/25 17:53:27 | 
| Line 12 | Line 12 | 
 | * 2. Redistributions in binary form must reproduce the above copyright | * 2. Redistributions in binary form must reproduce the above copyright | 
 | *    notice, this list of conditions and the following disclaimer in the | *    notice, this list of conditions and the following disclaimer in the | 
 | *    documentation and/or other materials provided with the distribution. | *    documentation and/or other materials provided with the distribution. | 
 | * 3. The name of the author may not be used to endorse or promote products |  | 
 | *    derived from this software without specific prior written permission. |  | 
 | * | * | 
 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | 
 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | 
| Line 33 | Line 31 | 
 |  |  | 
 |  |  | 
 | void | void | 
| load_segreg(int idx, WORD selector, int exc) | load_segreg(int idx, UINT16 selector, int exc) | 
 | { | { | 
 | selector_t sel; | selector_t sel; | 
 | int rv; | int rv; | 
| Line 47  load_segreg(int idx, WORD selector, int | Line 45  load_segreg(int idx, WORD selector, int | 
 | CPU_REGS_SREG(idx) = selector; | CPU_REGS_SREG(idx) = selector; | 
 |  |  | 
 | memset(&sd, 0, sizeof(sd)); | memset(&sd, 0, sizeof(sd)); | 
 |  | if (idx == CPU_CS_INDEX) { | 
 |  | sd.rpl = CPU_STAT_CPL; | 
 |  | } | 
 | sd.u.seg.limit = CPU_STAT_SREGLIMIT(idx); | sd.u.seg.limit = CPU_STAT_SREGLIMIT(idx); | 
 | CPU_SET_SEGDESC_DEFAULT(&sd, idx, selector); | CPU_SET_SEGDESC_DEFAULT(&sd, idx, selector); | 
 | CPU_STAT_SREG(idx) = sd; | CPU_STAT_SREG(idx) = sd; | 
 |  |  | 
 | if (idx == CPU_CS_INDEX) { |  | 
 | CPU_INST_OP32 = CPU_INST_AS32 = |  | 
 | CPU_STATSAVE.cpu_inst_default.op_32 = |  | 
 | CPU_STATSAVE.cpu_inst_default.as_32 = 0; |  | 
 | } else if (idx == CPU_SS_INDEX) { |  | 
 | CPU_STAT_SS32 = 0; |  | 
 | } |  | 
 | return; | return; | 
 | } | } | 
 |  |  | 
| Line 82  load_segreg(int idx, WORD selector, int | Line 75  load_segreg(int idx, WORD selector, int | 
 |  |  | 
 | switch (idx) { | switch (idx) { | 
 | case CPU_SS_INDEX: | case CPU_SS_INDEX: | 
| if ((CPU_STAT_CPL != sel.rpl) || | if ((CPU_STAT_CPL != sel.rpl) | 
| !sel.desc.s || sel.desc.u.seg.c || !sel.desc.u.seg.wr || | || (CPU_STAT_CPL != sel.desc.dpl) | 
| (CPU_STAT_CPL != sel.desc.dpl)) { | || !sel.desc.s | 
|  | || sel.desc.u.seg.c | 
|  | || !sel.desc.u.seg.wr) { | 
 | EXCEPTION(exc, sel.idx); | EXCEPTION(exc, sel.idx); | 
 | } | } | 
 |  |  | 
| Line 134  load_segreg(int idx, WORD selector, int | Line 129  load_segreg(int idx, WORD selector, int | 
 | * load SS register | * load SS register | 
 | */ | */ | 
 | void | void | 
| load_ss(WORD selector, descriptor_t* sdp, BYTE cpl) | load_ss(UINT16 selector, const descriptor_t *sd, UINT cpl) | 
 | { | { | 
 |  |  | 
| CPU_STAT_SS32 = sdp->d; | CPU_STAT_SS32 = sd->d; | 
| CPU_REGS_SREG(CPU_SS_INDEX) = (selector & ~3) | (cpl & 3); | CPU_REGS_SREG(CPU_SS_INDEX) = (UINT16)((selector & ~3) | (cpl & 3)); | 
| CPU_STAT_SREG(CPU_SS_INDEX) = *sdp; | CPU_STAT_SREG(CPU_SS_INDEX) = *sd; | 
 | } | } | 
 |  |  | 
 | /* | /* | 
 | * load CS register | * load CS register | 
 | */ | */ | 
 | void | void | 
| load_cs(WORD selector, descriptor_t* sdp, BYTE cpl) | load_cs(UINT16 selector, const descriptor_t *sd, UINT cpl) | 
 | { | { | 
 |  |  | 
 | CPU_INST_OP32 = CPU_INST_AS32 = | CPU_INST_OP32 = CPU_INST_AS32 = | 
 | CPU_STATSAVE.cpu_inst_default.op_32 = | CPU_STATSAVE.cpu_inst_default.op_32 = | 
| CPU_STATSAVE.cpu_inst_default.as_32 = sdp->d; | CPU_STATSAVE.cpu_inst_default.as_32 = sd->d; | 
| CPU_REGS_SREG(CPU_CS_INDEX) = (selector & ~3) | (cpl & 3); | CPU_REGS_SREG(CPU_CS_INDEX) = (UINT16)((selector & ~3) | (cpl & 3)); | 
| CPU_STAT_SREG(CPU_CS_INDEX) = *sdp; | CPU_STAT_SREG(CPU_CS_INDEX) = *sd; | 
| CPU_STAT_CPL = cpl & 3; | CPU_SET_CPL(cpl & 3); | 
 | } | } | 
 |  |  | 
 | /* | /* | 
 | * load LDT register | * load LDT register | 
 | */ | */ | 
 | void | void | 
| load_ldtr(WORD selector, int exc) | load_ldtr(UINT16 selector, int exc) | 
 | { | { | 
 | selector_t sel; | selector_t sel; | 
 | int rv; | int rv; | 
| Line 182  load_ldtr(WORD selector, int exc) | Line 177  load_ldtr(WORD selector, int exc) | 
 | EXCEPTION(exc, sel.selector); | EXCEPTION(exc, sel.selector); | 
 | } | } | 
 |  |  | 
 |  | #if 0 | 
 |  | /* | 
 |  | * LEMM の挙動より LDT セグメントのリミットチェック処理を無効化 | 
 |  | * | 
 |  | * 症状1:リミット 0 の LDT セレクタを LLDT は駄目っぽい。 | 
 |  | * 対策1:リミット 0 の LDT セレクタの代わりにヌルセレクタを LLDT。 | 
 |  | */ | 
 | /* check limit */ | /* check limit */ | 
 | if (sel.desc.u.seg.limit < 7) { | if (sel.desc.u.seg.limit < 7) { | 
 | ia32_panic("load_ldtr: LDTR descriptor limit < 7 (limit = %d)", sel.desc.u.seg.limit); | ia32_panic("load_ldtr: LDTR descriptor limit < 7 (limit = %d)", sel.desc.u.seg.limit); | 
 | } | } | 
 |  | #endif | 
 |  |  | 
 | /* not present */ | /* not present */ | 
 | rv = selector_is_not_present(&sel); | rv = selector_is_not_present(&sel); | 
| Line 193  load_ldtr(WORD selector, int exc) | Line 196  load_ldtr(WORD selector, int exc) | 
 | EXCEPTION((exc == TS_EXCEPTION) ? TS_EXCEPTION : NP_EXCEPTION, sel.selector); | EXCEPTION((exc == TS_EXCEPTION) ? TS_EXCEPTION : NP_EXCEPTION, sel.selector); | 
 | } | } | 
 |  |  | 
| #if defined(DEBUG) | #if defined(MORE_DEBUG) | 
 | ldtr_dump(sel.desc.u.seg.segbase, sel.desc.u.seg.limit); | ldtr_dump(sel.desc.u.seg.segbase, sel.desc.u.seg.limit); | 
 | #endif | #endif | 
 |  |  | 
| Line 202  load_ldtr(WORD selector, int exc) | Line 205  load_ldtr(WORD selector, int exc) | 
 | } | } | 
 |  |  | 
 | void | void | 
| load_descriptor(descriptor_t *descp, DWORD addr) | load_descriptor(descriptor_t *descp, UINT32 addr) | 
 | { | { | 
 |  | UINT32 l, h; | 
 |  |  | 
 | memset(descp, 0, sizeof(*descp)); | memset(descp, 0, sizeof(*descp)); | 
 |  |  | 
| descp->addr = addr; | l = cpu_kmemoryread_d(addr); | 
| descp->l = cpu_lmemoryread_d(descp->addr); | h = cpu_kmemoryread_d(addr + 4); | 
| descp->h = cpu_lmemoryread_d(descp->addr + 4); | VERBOSE(("load_descriptor: descriptor address = 0x%08x, h = 0x%08x, l = %08x", addr, h, l)); | 
| VERBOSE(("load_descriptor: descriptor address = 0x%08x, h = 0x%08x, l = %08x", descp->addr, descp->h, descp->l)); |  | 
 |  |  | 
 | descp->flag = 0; | descp->flag = 0; | 
 |  |  | 
| descp->p = (descp->h & CPU_DESC_H_P) == CPU_DESC_H_P; | descp->p = (h & CPU_DESC_H_P) == CPU_DESC_H_P; | 
| descp->type = (descp->h & CPU_DESC_H_TYPE) >> 8; | descp->type = (UINT8)((h & CPU_DESC_H_TYPE) >> 8); | 
| descp->dpl = (descp->h & CPU_DESC_H_DPL) >> 13; | descp->dpl = (UINT8)((h & CPU_DESC_H_DPL) >> 13); | 
| descp->s = (descp->h & CPU_DESC_H_S) == CPU_DESC_H_S; | descp->s = (h & CPU_DESC_H_S) == CPU_DESC_H_S; | 
 |  |  | 
 | VERBOSE(("load_descriptor: present = %s, type = %d, DPL = %d", descp->p ? "true" : "false", descp->type, descp->dpl)); | VERBOSE(("load_descriptor: present = %s, type = %d, DPL = %d", descp->p ? "true" : "false", descp->type, descp->dpl)); | 
 |  |  | 
 | if (descp->s) { | if (descp->s) { | 
 | /* code/data */ | /* code/data */ | 
 | descp->valid = 1; | descp->valid = 1; | 
| descp->d = (descp->h & CPU_SEGDESC_H_D) ? 1 : 0; | descp->d = (h & CPU_SEGDESC_H_D) ? 1 : 0; | 
 |  |  | 
| descp->u.seg.c = (descp->h & CPU_SEGDESC_H_D_C) ? 1 : 0; | descp->u.seg.c = (h & CPU_SEGDESC_H_D_C) ? 1 : 0; | 
| descp->u.seg.g = (descp->h & CPU_SEGDESC_H_G) ? 1 : 0; | descp->u.seg.g = (h & CPU_SEGDESC_H_G) ? 1 : 0; | 
 | descp->u.seg.wr = (descp->type & CPU_SEGDESC_TYPE_WR) ? 1 : 0; | descp->u.seg.wr = (descp->type & CPU_SEGDESC_TYPE_WR) ? 1 : 0; | 
 | descp->u.seg.ec = (descp->type & CPU_SEGDESC_TYPE_EC) ? 1 : 0; | descp->u.seg.ec = (descp->type & CPU_SEGDESC_TYPE_EC) ? 1 : 0; | 
 |  |  | 
| descp->u.seg.segbase  = (descp->l >> 16) & 0xffff; | descp->u.seg.segbase  = (l >> 16) & 0xffff; | 
| descp->u.seg.segbase |= (descp->h & 0xff) << 16; | descp->u.seg.segbase |= (h & 0xff) << 16; | 
| descp->u.seg.segbase |= descp->h & 0xff000000; | descp->u.seg.segbase |= h & 0xff000000; | 
| descp->u.seg.limit = (descp->h & 0xf0000) | (descp->l & 0xffff); | descp->u.seg.limit = (h & 0xf0000) | (l & 0xffff); | 
 | if (descp->u.seg.g) { | if (descp->u.seg.g) { | 
 | descp->u.seg.limit <<= 12; | descp->u.seg.limit <<= 12; | 
 | descp->u.seg.limit |= 0xfff; | descp->u.seg.limit |= 0xfff; | 
| Line 250  load_descriptor(descriptor_t *descp, DWO | Line 253  load_descriptor(descriptor_t *descp, DWO | 
 | switch (descp->type) { | switch (descp->type) { | 
 | case CPU_SYSDESC_TYPE_LDT:              /* LDT */ | case CPU_SYSDESC_TYPE_LDT:              /* LDT */ | 
 | descp->valid = 1; | descp->valid = 1; | 
| descp->u.seg.g = (descp->h & CPU_SEGDESC_H_G) ? 1 : 0; | descp->u.seg.g = (h & CPU_SEGDESC_H_G) ? 1 : 0; | 
 |  |  | 
| descp->u.seg.segbase  = descp->h & 0xff000000; | descp->u.seg.segbase  = h & 0xff000000; | 
| descp->u.seg.segbase |= (descp->h & 0xff) << 16; | descp->u.seg.segbase |= (h & 0xff) << 16; | 
| descp->u.seg.segbase |= descp->l >> 16; | descp->u.seg.segbase |= l >> 16; | 
| descp->u.seg.limit  = descp->h & 0xf0000; | descp->u.seg.limit  = h & 0xf0000; | 
| descp->u.seg.limit |= descp->l & 0xffff; | descp->u.seg.limit |= l & 0xffff; | 
 | if (descp->u.seg.g) { | if (descp->u.seg.g) { | 
 | descp->u.seg.limit <<= 12; | descp->u.seg.limit <<= 12; | 
 | descp->u.seg.limit |= 0xfff; | descp->u.seg.limit |= 0xfff; | 
| Line 269  load_descriptor(descriptor_t *descp, DWO | Line 272  load_descriptor(descriptor_t *descp, DWO | 
 |  |  | 
 | case CPU_SYSDESC_TYPE_TASK:             /* task gate */ | case CPU_SYSDESC_TYPE_TASK:             /* task gate */ | 
 | descp->valid = 1; | descp->valid = 1; | 
| descp->u.gate.selector = descp->l >> 16; | descp->u.gate.selector = (UINT16)(l >> 16); | 
 |  |  | 
 | VERBOSE(("load_descriptor: task descriptor: selector = 0x%04x", descp->u.gate.selector)); | VERBOSE(("load_descriptor: task descriptor: selector = 0x%04x", descp->u.gate.selector)); | 
 | break; | break; | 
| Line 279  load_descriptor(descriptor_t *descp, DWO | Line 282  load_descriptor(descriptor_t *descp, DWO | 
 | case CPU_SYSDESC_TYPE_TSS_32:           /* 386 TSS */ | case CPU_SYSDESC_TYPE_TSS_32:           /* 386 TSS */ | 
 | case CPU_SYSDESC_TYPE_TSS_BUSY_32:      /* 386 TSS Busy */ | case CPU_SYSDESC_TYPE_TSS_BUSY_32:      /* 386 TSS Busy */ | 
 | descp->valid = 1; | descp->valid = 1; | 
| descp->d = (descp->h & CPU_GATEDESC_H_D) ? 1 : 0; | descp->d = (h & CPU_GATEDESC_H_D) ? 1 : 0; | 
| descp->u.seg.g = (descp->h & CPU_SEGDESC_H_G) ? 1 : 0; | descp->u.seg.g = (h & CPU_SEGDESC_H_G) ? 1 : 0; | 
 |  |  | 
| descp->u.seg.segbase  = descp->h & 0xff000000; | descp->u.seg.segbase  = h & 0xff000000; | 
| descp->u.seg.segbase |= (descp->h & 0xff) << 16; | descp->u.seg.segbase |= (h & 0xff) << 16; | 
| descp->u.seg.segbase |= descp->l >> 16; | descp->u.seg.segbase |= l >> 16; | 
| descp->u.seg.limit  = descp->h & 0xf0000; | descp->u.seg.limit  = h & 0xf0000; | 
| descp->u.seg.limit |= descp->l & 0xffff; | descp->u.seg.limit |= l & 0xffff; | 
 | if (descp->u.seg.g) { | if (descp->u.seg.g) { | 
 | descp->u.seg.limit <<= 12; | descp->u.seg.limit <<= 12; | 
 | descp->u.seg.limit |= 0xfff; | descp->u.seg.limit |= 0xfff; | 
 | } | } | 
 | descp->u.seg.segend = descp->u.seg.segbase + descp->u.seg.limit; | descp->u.seg.segend = descp->u.seg.segbase + descp->u.seg.limit; | 
 |  |  | 
| VERBOSE(("load_descriptor: %dbit %sTSS descriptor", descp->d ? 32 : 16, (descp->type & CPU_SYSDESC_TYPE_TSS_BUSY) ? "busy " : "")); | VERBOSE(("load_descriptor: %dbit %sTSS descriptor", descp->d ? 32 : 16, (descp->type & CPU_SYSDESC_TYPE_TSS_BUSY_IND) ? "busy " : "")); | 
 | VERBOSE(("load_descriptor: TSS base address = 0x%08x, limit = 0x%08x", descp->u.seg.segbase, descp->u.seg.limit)); | VERBOSE(("load_descriptor: TSS base address = 0x%08x, limit = 0x%08x", descp->u.seg.segbase, descp->u.seg.limit)); | 
 | VERBOSE(("load_descriptor: d = %s, g = %s", descp->d ? "on" : "off", descp->u.seg.g ? "on" : "off")); | VERBOSE(("load_descriptor: d = %s, g = %s", descp->d ? "on" : "off", descp->u.seg.g ? "on" : "off")); | 
 | break; | break; | 
| Line 304  load_descriptor(descriptor_t *descp, DWO | Line 307  load_descriptor(descriptor_t *descp, DWO | 
 | case CPU_SYSDESC_TYPE_CALL_32:          /* 386 call gate */ | case CPU_SYSDESC_TYPE_CALL_32:          /* 386 call gate */ | 
 | case CPU_SYSDESC_TYPE_INTR_32:          /* 386 interrupt gate */ | case CPU_SYSDESC_TYPE_INTR_32:          /* 386 interrupt gate */ | 
 | case CPU_SYSDESC_TYPE_TRAP_32:          /* 386 trap gate */ | case CPU_SYSDESC_TYPE_TRAP_32:          /* 386 trap gate */ | 
| if ((descp->h & 0x0000000e0) == 0) { | if ((h & 0x0000000e0) == 0) { | 
 | descp->valid = 1; | descp->valid = 1; | 
| descp->d = (descp->h & CPU_GATEDESC_H_D) ? 1:0; | descp->d = (h & CPU_GATEDESC_H_D) ? 1:0; | 
| descp->u.gate.selector = descp->l >> 16; | descp->u.gate.selector = (UINT16)(l >> 16); | 
| descp->u.gate.offset  = descp->h & 0xffff0000; | descp->u.gate.offset  = h & 0xffff0000; | 
| descp->u.gate.offset |= descp->l & 0xffff; | descp->u.gate.offset |= l & 0xffff; | 
| descp->u.gate.count = descp->h & 0x1f; | descp->u.gate.count = (BYTE)(h & 0x1f); | 
 |  |  | 
 | VERBOSE(("load_descriptor: %dbit %s gate descriptor", descp->d ? 32 : 16, ((descp->type & CPU_SYSDESC_TYPE_MASKBIT) == CPU_SYSDESC_TYPE_CALL) ? "call" : (((descp->type & CPU_SYSDESC_TYPE_MASKBIT) == CPU_SYSDESC_TYPE_INTR) ? "interrupt" : "trap"))); | VERBOSE(("load_descriptor: %dbit %s gate descriptor", descp->d ? 32 : 16, ((descp->type & CPU_SYSDESC_TYPE_MASKBIT) == CPU_SYSDESC_TYPE_CALL) ? "call" : (((descp->type & CPU_SYSDESC_TYPE_MASKBIT) == CPU_SYSDESC_TYPE_INTR) ? "interrupt" : "trap"))); | 
 | VERBOSE(("load_descriptor: selector = 0x%04x, offset = 0x%08x, count = %d, d = %s", descp->u.gate.selector, descp->u.gate.offset, descp->u.gate.count, descp->d ? "on" : "off")); | VERBOSE(("load_descriptor: selector = 0x%04x, offset = 0x%08x, count = %d, d = %s", descp->u.gate.selector, descp->u.gate.offset, descp->u.gate.count, descp->d ? "on" : "off")); | 
| Line 322  load_descriptor(descriptor_t *descp, DWO | Line 325  load_descriptor(descriptor_t *descp, DWO | 
 | case 0: case 8: case 10: case 13: /* reserved */ | case 0: case 8: case 10: case 13: /* reserved */ | 
 | default: | default: | 
 | descp->valid = 0; | descp->valid = 0; | 
 | ia32_panic("load_descriptor: bad descriptor (type = %d)", descp->type); |  | 
 | break; | break; | 
 | } | } | 
 | } | } | 
 | } | } | 
 |  |  | 
 | int | int | 
| parse_selector(selector_t* ssp, WORD selector) | parse_selector(selector_t *ssp, UINT16 selector) | 
 | { | { | 
| DWORD base; | UINT32 base; | 
| WORD limit; | UINT limit; | 
| WORD idx; | UINT idx; | 
 |  |  | 
 | ssp->selector = selector; | ssp->selector = selector; | 
 | ssp->idx = selector & ~3; | ssp->idx = selector & ~3; | 
 | ssp->rpl = selector & 3; | ssp->rpl = selector & 3; | 
| ssp->ldt = selector & CPU_SEGMENT_TABLE_IND; | ssp->ldt = (UINT8)(selector & CPU_SEGMENT_TABLE_IND); | 
 |  |  | 
 | VERBOSE(("parse_selector: selector = %04x, index = %d, RPL = %d, %cDT", ssp->selector, ssp->idx >> 3, ssp->rpl, ssp->ldt ? 'L' : 'G')); | VERBOSE(("parse_selector: selector = %04x, index = %d, RPL = %d, %cDT", ssp->selector, ssp->idx >> 3, ssp->rpl, ssp->ldt ? 'L' : 'G')); | 
 |  |  | 
 | /* descriptor table */ | /* descriptor table */ | 
| idx = selector & ~7; | idx = selector & CPU_SEGMENT_SELECTOR_INDEX_MASK; | 
 | if (ssp->ldt) { | if (ssp->ldt) { | 
 | /* LDT */ | /* LDT */ | 
 | if (!CPU_LDTR_DESC.valid) { | if (!CPU_LDTR_DESC.valid) { | 
| Line 365  parse_selector(selector_t* ssp, WORD sel | Line 367  parse_selector(selector_t* ssp, WORD sel | 
 | VERBOSE(("parse_selector: segment limit check failed")); | VERBOSE(("parse_selector: segment limit check failed")); | 
 | return -3; | return -3; | 
 | } | } | 
 |  |  | 
 | /* load descriptor */ | /* load descriptor */ | 
| CPU_SET_SEGDESC(&ssp->desc, base + idx); | ssp->addr = base + idx; | 
|  | load_descriptor(&ssp->desc, ssp->addr); | 
 | if (!ssp->desc.valid) { | if (!ssp->desc.valid) { | 
 | VERBOSE(("parse_selector: segment descriptor is invalid")); | VERBOSE(("parse_selector: segment descriptor is invalid")); | 
 | return -4; | return -4; | 
 | } | } | 
 |  |  | 
 | return 0; | return 0; | 
 | } | } | 
 |  |  | 
 | int | int | 
| selector_is_not_present(selector_t* ssp) | selector_is_not_present(const selector_t *ssp) | 
 | { | { | 
 |  | UINT32 h; | 
 |  |  | 
 | /* not present */ | /* not present */ | 
 | if (!ssp->desc.p) { | if (!ssp->desc.p) { | 
 | VERBOSE(("selector_is_not_present: not present")); | VERBOSE(("selector_is_not_present: not present")); | 
 | return -1; | return -1; | 
 | } | } | 
| CPU_SET_SEGDESC_POSTPART(&ssp->desc); |  | 
|  | /* set access bit if code/data segment descriptor */ | 
|  | if (ssp->desc.s) { | 
|  | h = cpu_kmemoryread_d(ssp->addr + 4); | 
|  | if (!(h & CPU_SEGDESC_H_A)) { | 
|  | h |= CPU_SEGDESC_H_A; | 
|  | cpu_kmemorywrite_d(ssp->addr + 4, h); | 
|  | } | 
|  | } | 
|  |  | 
 | return 0; | return 0; | 
 | } | } |