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| version 1.11, 2004/02/20 16:09:04 | version 1.18, 2004/06/15 13:50:13 |
|---|---|
| Line 1 | Line 1 |
| /* $Id$ */ | /* $Id$ */ |
| /* | /* |
| * Copyright (c) 2002-2003 NONAKA Kimihiro | * Copyright (c) 2002-2004 NONAKA Kimihiro |
| * All rights reserved. | * All rights reserved. |
| * | * |
| * Redistribution and use in source and binary forms, with or without | * Redistribution and use in source and binary forms, with or without |
| Line 154 cpu_memorywrite_check(descriptor_t *sd, | Line 154 cpu_memorywrite_check(descriptor_t *sd, |
| sd->flag |= CPU_DESC_FLAG_WRITABLE; | sd->flag |= CPU_DESC_FLAG_WRITABLE; |
| } | } |
| BOOL | void |
| cpu_stack_push_check(descriptor_t *sd, UINT32 esp, UINT length) | cpu_stack_push_check(UINT16 s, descriptor_t *sd, UINT32 esp, UINT length) |
| { | { |
| UINT32 limit; | UINT32 limit; |
| if (CPU_STAT_PM) { | if (CPU_STAT_PM) { |
| if (!sd->valid || !sd->p) | if (!sd->valid || !sd->p) { |
| return FALSE; | VERBOSE(("cpu_stack_push_check: valid = %d, present = %d", sd->valid, sd->p)); |
| if (!sd->s || sd->u.seg.c || !sd->u.seg.wr) | EXCEPTION(SS_EXCEPTION, s & 0xfffc); |
| return FALSE; | } |
| if (!sd->s || sd->u.seg.c || !sd->u.seg.wr) { | |
| VERBOSE(("cpu_stack_push_check: s = %d, c = %d, wr", sd->s, sd->u.seg.c, sd->u.seg.wr)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| if (!sd->d) { | if (!sd->d) { |
| esp &= 0xffff; | |
| limit = 0xffff; | limit = 0xffff; |
| } else { | } else { |
| limit = 0xffffffff; | limit = 0xffffffff; |
| Line 176 cpu_stack_push_check(descriptor_t *sd, U | Line 179 cpu_stack_push_check(descriptor_t *sd, U |
| if ((esp == 0) | if ((esp == 0) |
| || (esp < length) | || (esp < length) |
| || (esp - length <= sd->u.seg.limit) | || (esp - length <= sd->u.seg.limit) |
| || (esp > limit)) | || (esp > limit)) { |
| return FALSE; | VERBOSE(("cpu_stack_push_check: expand-down, esp = %08x, length = %08x", esp, length)); |
| VERBOSE(("cpu_stack_push_check: limit = %08x, seglimit = %08x", limit, sd->u.seg.limit)); | |
| VERBOSE(("cpu_stack_push_check: segbase = %08x, segend = %08x", sd->u.seg.segbase, sd->u.seg.segend)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| } else { | } else { |
| /* expand-up stack */ | /* expand-up stack */ |
| if (esp == 0) { | if (esp == 0) { |
| if ((sd->d && (sd->u.seg.segend != 0xffffffff)) | if ((sd->d && (sd->u.seg.segend != 0xffffffff)) |
| || (!sd->d && (sd->u.seg.segend != 0xffff))) | || (!sd->d && (sd->u.seg.segend != 0xffff))) { |
| return FALSE; | VERBOSE(("cpu_stack_push_check: expand-up, esp = %08x, length = %08x", esp, length)); |
| VERBOSE(("cpu_stack_push_check: limit = %08x, seglimit = %08x", limit, sd->u.seg.limit)); | |
| VERBOSE(("cpu_stack_push_check: segbase = %08x, segend = %08x", sd->u.seg.segbase, sd->u.seg.segend)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| } else { | } else { |
| if ((esp < length) | if ((esp < length) |
| || (esp - 1 > sd->u.seg.limit)) | || (esp - 1 > sd->u.seg.limit)) { |
| return FALSE; | VERBOSE(("cpu_stack_push_check: expand-up, esp = %08x, length = %08x", esp, length)); |
| VERBOSE(("cpu_stack_push_check: limit = %08x, seglimit = %08x", limit, sd->u.seg.limit)); | |
| VERBOSE(("cpu_stack_push_check: segbase = %08x, segend = %08x", sd->u.seg.segbase, sd->u.seg.segend)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| } | } |
| } | } |
| } | } |
| return TRUE; | |
| } | } |
| BOOL | void |
| cpu_stack_pop_check(descriptor_t *sd, UINT32 esp, UINT length) | cpu_stack_pop_check(UINT16 s, descriptor_t *sd, UINT32 esp, UINT length) |
| { | { |
| UINT32 limit; | UINT32 limit; |
| if (CPU_STAT_PM) { | if (CPU_STAT_PM) { |
| if (!sd->valid || !sd->p) | if (!sd->valid || !sd->p) { |
| return FALSE; | VERBOSE(("cpu_stack_pop_check: valid = %d, present = %d", sd->valid, sd->p)); |
| if (!sd->s || sd->u.seg.c || !sd->u.seg.wr) | EXCEPTION(SS_EXCEPTION, s & 0xfffc); |
| return FALSE; | } |
| if (!sd->s || sd->u.seg.c || !sd->u.seg.wr) { | |
| VERBOSE(("cpu_stack_pop_check: s = %d, c = %d, wr", sd->s, sd->u.seg.c, sd->u.seg.wr)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| if (!sd->d) { | if (!sd->d) { |
| esp &= 0xffff; | |
| limit = 0xffff; | limit = 0xffff; |
| } else { | } else { |
| limit = 0xffffffff; | limit = 0xffffffff; |
| Line 214 cpu_stack_pop_check(descriptor_t *sd, UI | Line 231 cpu_stack_pop_check(descriptor_t *sd, UI |
| if (sd->u.seg.ec) { | if (sd->u.seg.ec) { |
| /* expand-down stack */ | /* expand-down stack */ |
| if ((esp == limit) | if ((esp == limit) |
| || ((limit - esp) + 1 < length)) | || ((limit - esp) + 1 < length)) { |
| return FALSE; | VERBOSE(("cpu_stack_pop_check: expand-up, esp = %08x, length = %08x", esp, length)); |
| VERBOSE(("cpu_stack_pop_check: limit = %08x, seglimit = %08x", limit, sd->u.seg.limit)); | |
| VERBOSE(("cpu_stack_pop_check: segbase = %08x, segend = %08x", sd->u.seg.segbase, sd->u.seg.segend)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| } else { | } else { |
| /* expand-up stack */ | /* expand-up stack */ |
| if ((esp == limit) | if ((esp == limit) |
| || (sd->u.seg.segend == 0) | || (sd->u.seg.segend == 0) |
| || (esp > sd->u.seg.limit) | || (esp > sd->u.seg.limit) |
| || ((sd->u.seg.limit - esp) + 1 < length)) | || ((sd->u.seg.limit - esp) + 1 < length)) { |
| return FALSE; | VERBOSE(("cpu_stack_pop_check: expand-up, esp = %08x, length = %08x", esp, length)); |
| VERBOSE(("cpu_stack_pop_check: limit = %08x, seglimit = %08x", limit, sd->u.seg.limit)); | |
| VERBOSE(("cpu_stack_pop_check: segbase = %08x, segend = %08x", sd->u.seg.segbase, sd->u.seg.segend)); | |
| EXCEPTION(SS_EXCEPTION, s & 0xfffc); | |
| } | |
| } | |
| } | |
| } | |
| #if defined(IA32_SUPPORT_DEBUG_REGISTER) | |
| INLINE static void | |
| check_memory_break_point(UINT32 address, UINT length, UINT rw) | |
| { | |
| int i; | |
| if (CPU_STAT_BP && !(CPU_EFLAG & RF_FLAG)) { | |
| for (i = 0; i < CPU_DEBUG_REG_INDEX_NUM; i++) { | |
| if ((CPU_STAT_BP & (1 << i)) | |
| && (CPU_DR7_GET_RW(i) & rw) | |
| && ((address <= CPU_DR(i) && address + length > CPU_DR(i)) | |
| || (address > CPU_DR(i) && address < CPU_DR(i) + CPU_DR7_GET_LEN(i)))) { | |
| CPU_STAT_BP_EVENT |= CPU_STAT_BP_EVENT_B(i); | |
| } | |
| } | } |
| } | } |
| return TRUE; | |
| } | } |
| #else | |
| #define check_memory_break_point(address, length, rw) | |
| #endif | |
| /* | /* |
| * code fetch | * code fetch |
| */ | */ |
| #define ucrw (CPU_PAGE_READ_CODE | CPU_STAT_USER_MODE) | |
| UINT8 MEMCALL | UINT8 MEMCALL |
| cpu_codefetch(UINT32 offset) | cpu_codefetch(UINT32 offset) |
| { | { |
| descriptor_t *sd; | descriptor_t *sd; |
| UINT32 addr; | UINT32 addr; |
| #if defined(IA32_SUPPORT_TLB) | |
| TLB_ENTRY_T *ep; | |
| #endif | |
| sd = &CPU_STAT_SREG(CPU_CS_INDEX); | sd = &CPU_STAT_SREG(CPU_CS_INDEX); |
| if (offset <= sd->u.seg.limit) { | if (offset <= sd->u.seg.limit) { |
| addr = CPU_STAT_SREGBASE(CPU_CS_INDEX) + offset; | addr = sd->u.seg.segbase + offset; |
| if (!CPU_STAT_PM) | if (!CPU_STAT_PAGING) |
| return cpu_memoryread(addr); | return cpu_memoryread(addr); |
| return cpu_lcmemoryread(addr); | #if defined(IA32_SUPPORT_TLB) |
| ep = tlb_lookup(addr, ucrw); | |
| if (ep != NULL && ep->memp != NULL) { | |
| return ep->memp[addr & 0xfff]; | |
| } | |
| #endif | |
| return cpu_linear_memory_read_b(addr, ucrw); | |
| } | } |
| EXCEPTION(GP_EXCEPTION, 0); | EXCEPTION(GP_EXCEPTION, 0); |
| return 0; /* compiler happy */ | return 0; /* compiler happy */ |
| Line 254 cpu_codefetch_w(UINT32 offset) | Line 311 cpu_codefetch_w(UINT32 offset) |
| { | { |
| descriptor_t *sd; | descriptor_t *sd; |
| UINT32 addr; | UINT32 addr; |
| #if defined(IA32_SUPPORT_TLB) | |
| TLB_ENTRY_T *ep; | |
| UINT16 value; | |
| #endif | |
| sd = &CPU_STAT_SREG(CPU_CS_INDEX); | sd = &CPU_STAT_SREG(CPU_CS_INDEX); |
| if (offset <= sd->u.seg.limit - 1) { | if (offset <= sd->u.seg.limit - 1) { |
| addr = CPU_STAT_SREGBASE(CPU_CS_INDEX) + offset; | addr = sd->u.seg.segbase + offset; |
| if (!CPU_STAT_PM) | if (!CPU_STAT_PAGING) |
| return cpu_memoryread_w(addr); | return cpu_memoryread_w(addr); |
| return cpu_lcmemoryread_w(addr); | #if defined(IA32_SUPPORT_TLB) |
| ep = tlb_lookup(addr, ucrw); | |
| if (ep != NULL && ep->memp != NULL) { | |
| if ((addr + 1) & 0x00000fff) { | |
| return LOADINTELWORD(ep->memp + (addr & 0xfff)); | |
| } | |
| value = ep->memp[0xfff]; | |
| ep = tlb_lookup(addr + 1, ucrw); | |
| if (ep != NULL && ep->memp != NULL) { | |
| value += (UINT16)ep->memp[0] << 8; | |
| return value; | |
| } | |
| } | |
| #endif | |
| return cpu_linear_memory_read_w(addr, ucrw); | |
| } | } |
| EXCEPTION(GP_EXCEPTION, 0); | EXCEPTION(GP_EXCEPTION, 0); |
| return 0; /* compiler happy */ | return 0; /* compiler happy */ |
| Line 271 cpu_codefetch_d(UINT32 offset) | Line 346 cpu_codefetch_d(UINT32 offset) |
| { | { |
| descriptor_t *sd; | descriptor_t *sd; |
| UINT32 addr; | UINT32 addr; |
| #if defined(IA32_SUPPORT_TLB) | |
| TLB_ENTRY_T *ep[2]; | |
| UINT32 value; | |
| UINT remain; | |
| #endif | |
| sd = &CPU_STAT_SREG(CPU_CS_INDEX); | sd = &CPU_STAT_SREG(CPU_CS_INDEX); |
| if (offset <= sd->u.seg.limit - 3) { | if (offset <= sd->u.seg.limit - 3) { |
| addr = CPU_STAT_SREGBASE(CPU_CS_INDEX) + offset; | addr = sd->u.seg.segbase + offset; |
| if (!CPU_STAT_PM) | if (!CPU_STAT_PAGING) |
| return cpu_memoryread_d(addr); | return cpu_memoryread_d(addr); |
| return cpu_lcmemoryread_d(addr); | #if defined(IA32_SUPPORT_TLB) |
| ep[0] = tlb_lookup(addr, ucrw); | |
| if (ep[0] != NULL && ep[0]->memp != NULL) { | |
| remain = 0x1000 - (addr & 0xfff); | |
| if (remain >= 4) { | |
| return LOADINTELDWORD(ep[0]->memp + (addr & 0xfff)); | |
| } | |
| ep[1] = tlb_lookup(addr + remain, ucrw); | |
| if (ep[1] != NULL && ep[1]->memp != NULL) { | |
| switch (remain) { | |
| case 3: | |
| value = ep[0]->memp[0xffd]; | |
| value += (UINT32)LOADINTELWORD(ep[0]->memp + 0xffe) << 8; | |
| value += (UINT32)ep[1]->memp[0] << 24; | |
| break; | |
| case 2: | |
| value = LOADINTELWORD(ep[0]->memp + 0xffe); | |
| value += (UINT32)LOADINTELWORD(ep[1]->memp + 0) << 16; | |
| break; | |
| case 1: | |
| value = ep[0]->memp[0xfff]; | |
| value += (UINT32)LOADINTELWORD(ep[1]->memp + 0) << 8; | |
| value += (UINT32)ep[1]->memp[2] << 24; | |
| break; | |
| default: | |
| ia32_panic("cpu_codefetch_d(): out of range. (remain = %d)\n", remain); | |
| return (UINT32)-1; | |
| } | |
| return value; | |
| } | |
| } | |
| #endif | |
| return cpu_linear_memory_read_d(addr, ucrw); | |
| } | } |
| EXCEPTION(GP_EXCEPTION, 0); | EXCEPTION(GP_EXCEPTION, 0); |
| return 0; /* compiler happy */ | return 0; /* compiler happy */ |
| Line 285 cpu_codefetch_d(UINT32 offset) | Line 400 cpu_codefetch_d(UINT32 offset) |
| /* | /* |
| * virtual address -> linear address | * virtual address memory access functions |
| */ | */ |
| UINT8 MEMCALL | #include "cpu_mem.mcr" |
| cpu_vmemoryread(int idx, UINT32 offset) | |
| { | |
| descriptor_t *sd; | |
| UINT32 addr; | |
| int exc; | |
| __ASSERT((unsigned int)idx < CPU_SEGREG_NUM); | |
| sd = &CPU_STAT_SREG(idx); | |
| if (!sd->valid) { | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| if (!(sd->flag & CPU_DESC_FLAG_READABLE)) { | |
| cpu_memoryread_check(sd, offset, 1, | |
| (idx == CPU_SS_INDEX) ? SS_EXCEPTION : GP_EXCEPTION); | |
| } else { | |
| switch (sd->type) { | |
| case 4: case 5: case 6: case 7: | |
| if (offset <= sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| default: | |
| if (offset > sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| } | |
| } | |
| addr = CPU_STAT_SREGBASE(idx) + offset; | |
| if (!CPU_STAT_PM) | |
| return cpu_memoryread(addr); | |
| return cpu_lmemoryread(addr, CPU_STAT_USER_MODE); | |
| err: | |
| EXCEPTION(exc, 0); | |
| return 0; /* compiler happy */ | |
| } | |
| UINT16 MEMCALL | |
| cpu_vmemoryread_w(int idx, UINT32 offset) | |
| { | |
| descriptor_t *sd; | |
| UINT32 addr; | |
| int exc; | |
| __ASSERT((unsigned int)idx < CPU_SEGREG_NUM); | |
| sd = &CPU_STAT_SREG(idx); | |
| if (!sd->valid) { | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| if (!(sd->flag & CPU_DESC_FLAG_READABLE)) { | |
| cpu_memoryread_check(sd, offset, 2, | |
| (idx == CPU_SS_INDEX) ? SS_EXCEPTION : GP_EXCEPTION); | |
| } else { | |
| switch (sd->type) { | |
| case 4: case 5: case 6: case 7: | |
| if (offset - 1 <= sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| default: | |
| if (offset > sd->u.seg.limit - 1) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| } | |
| } | |
| addr = CPU_STAT_SREGBASE(idx) + offset; | |
| if (!CPU_STAT_PM) | |
| return cpu_memoryread_w(addr); | |
| return cpu_lmemoryread_w(addr, CPU_STAT_USER_MODE); | |
| err: | |
| EXCEPTION(exc, 0); | |
| return 0; /* compiler happy */ | |
| } | |
| UINT32 MEMCALL | |
| cpu_vmemoryread_d(int idx, UINT32 offset) | |
| { | |
| descriptor_t *sd; | |
| UINT32 addr; | |
| int exc; | |
| __ASSERT((unsigned int)idx < CPU_SEGREG_NUM); | |
| sd = &CPU_STAT_SREG(idx); | VIRTUAL_ADDRESS_MEMORY_ACCESS_FUNCTION(b, UINT8, 1) |
| if (!sd->valid) { | VIRTUAL_ADDRESS_MEMORY_ACCESS_FUNCTION(w, UINT16, 2) |
| exc = GP_EXCEPTION; | VIRTUAL_ADDRESS_MEMORY_ACCESS_FUNCTION(d, UINT32, 4) |
| goto err; | |
| } | |
| if (!(sd->flag & CPU_DESC_FLAG_READABLE)) { | |
| cpu_memoryread_check(sd, offset, 4, | |
| (idx == CPU_SS_INDEX) ? SS_EXCEPTION : GP_EXCEPTION); | |
| } else { | |
| switch (sd->type) { | |
| case 4: case 5: case 6: case 7: | |
| if (offset - 3 <= sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| default: | |
| if (offset > sd->u.seg.limit - 3) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| } | |
| } | |
| addr = CPU_STAT_SREGBASE(idx) + offset; | |
| if (!CPU_STAT_PM) | |
| return cpu_memoryread_d(addr); | |
| return cpu_lmemoryread_d(addr, CPU_STAT_USER_MODE); | |
| err: | |
| EXCEPTION(exc, 0); | |
| return 0; /* compiler happy */ | |
| } | |
| /* vaddr memory write */ | |
| void MEMCALL | |
| cpu_vmemorywrite(int idx, UINT32 offset, UINT8 val) | |
| { | |
| descriptor_t *sd; | |
| UINT32 addr; | |
| int exc; | |
| __ASSERT((unsigned int)idx < CPU_SEGREG_NUM); | |
| sd = &CPU_STAT_SREG(idx); | |
| if (!sd->valid) { | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| if (!(sd->flag & CPU_DESC_FLAG_WRITABLE)) { | |
| cpu_memorywrite_check(sd, offset, 1, | |
| (idx == CPU_SS_INDEX) ? SS_EXCEPTION : GP_EXCEPTION); | |
| } else { | |
| switch (sd->type) { | |
| case 6: case 7: | |
| if (offset <= sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| default: | |
| if (offset > sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| } | |
| } | |
| addr = CPU_STAT_SREGBASE(idx) + offset; | |
| if (!CPU_STAT_PM) { | |
| /* real mode */ | |
| cpu_memorywrite(addr, val); | |
| } else { | |
| /* protected mode */ | |
| cpu_lmemorywrite(addr, val, CPU_STAT_USER_MODE); | |
| } | |
| return; | |
| err: | |
| EXCEPTION(exc, 0); | |
| } | |
| void MEMCALL | |
| cpu_vmemorywrite_w(int idx, UINT32 offset, UINT16 val) | |
| { | |
| descriptor_t *sd; | |
| UINT32 addr; | |
| int exc; | |
| __ASSERT((unsigned int)idx < CPU_SEGREG_NUM); | |
| sd = &CPU_STAT_SREG(idx); | |
| if (!sd->valid) { | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| if (!(sd->flag & CPU_DESC_FLAG_WRITABLE)) { | |
| cpu_memorywrite_check(sd, offset, 2, | |
| (idx == CPU_SS_INDEX) ? SS_EXCEPTION : GP_EXCEPTION); | |
| } else { | |
| switch (sd->type) { | |
| case 6: case 7: | |
| if (offset - 1 <= sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| default: | |
| if (offset > sd->u.seg.limit - 1) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| } | |
| } | |
| addr = CPU_STAT_SREGBASE(idx) + offset; | |
| if (!CPU_STAT_PM) { | |
| /* real mode */ | |
| cpu_memorywrite_w(addr, val); | |
| } else { | |
| /* protected mode */ | |
| cpu_lmemorywrite_w(addr, val, CPU_STAT_USER_MODE); | |
| } | |
| return; | |
| err: | |
| EXCEPTION(exc, 0); | |
| } | |
| void MEMCALL | |
| cpu_vmemorywrite_d(int idx, UINT32 offset, UINT32 val) | |
| { | |
| descriptor_t *sd; | |
| UINT32 addr; | |
| int exc; | |
| __ASSERT((unsigned int)idx < CPU_SEGREG_NUM); | |
| sd = &CPU_STAT_SREG(idx); | |
| if (!sd->valid) { | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| if (!(sd->flag & CPU_DESC_FLAG_WRITABLE)) { | |
| cpu_memorywrite_check(sd, offset, 4, | |
| (idx == CPU_SS_INDEX) ? SS_EXCEPTION : GP_EXCEPTION); | |
| } else { | |
| switch (sd->type) { | |
| case 6: case 7: | |
| if (offset - 3 <= sd->u.seg.limit) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| default: | |
| if (offset > sd->u.seg.limit - 3) { | |
| if (idx == CPU_SS_INDEX) | |
| exc = SS_EXCEPTION; | |
| else | |
| exc = GP_EXCEPTION; | |
| goto err; | |
| } | |
| break; | |
| } | |
| } | |
| addr = CPU_STAT_SREGBASE(idx) + offset; | |
| if (!CPU_STAT_PM) { | |
| /* real mode */ | |
| cpu_memorywrite_d(addr, val); | |
| } else { | |
| /* protected mode */ | |
| cpu_lmemorywrite_d(addr, val, CPU_STAT_USER_MODE); | |
| } | |
| return; | |
| err: | |
| EXCEPTION(exc, 0); | |
| } |