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[Qemu-devel] [5666] use target_mmap() to allocate idt, gdt and ldt (Kiri
From: |
Andrzej Zaborowski |
Subject: |
[Qemu-devel] [5666] use target_mmap() to allocate idt, gdt and ldt (Kirill A. |
Date: |
Mon, 10 Nov 2008 02:55:34 +0000 |
Revision: 5666
http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5666
Author: balrog
Date: 2008-11-10 02:55:33 +0000 (Mon, 10 Nov 2008)
Log Message:
-----------
use target_mmap() to allocate idt, gdt and ldt (Kirill A. Shutemov).
env->*dt.base should fit target address space, so we should use
target_mmap to allocate them.
Signed-off-by: Kirill A. Shutemov <address@hidden>
Modified Paths:
--------------
trunk/linux-user/main.c
trunk/linux-user/syscall.c
Modified: trunk/linux-user/main.c
===================================================================
--- trunk/linux-user/main.c 2008-11-10 01:34:27 UTC (rev 5665)
+++ trunk/linux-user/main.c 2008-11-10 02:55:33 UTC (rev 5666)
@@ -23,6 +23,7 @@
#include <string.h>
#include <errno.h>
#include <unistd.h>
+#include <sys/mman.h>
#include "qemu.h"
#include "qemu-common.h"
@@ -282,9 +283,8 @@
p[1] = tswap32(e2);
}
+static uint64_t *idt_table;
#ifdef TARGET_X86_64
-static uint64_t idt_table[512];
-
static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
uint64_t addr, unsigned int sel)
{
@@ -303,8 +303,6 @@
set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
}
#else
-static uint64_t idt_table[256];
-
static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
uint32_t addr, unsigned int sel)
{
@@ -2465,8 +2463,15 @@
#endif
/* linux interrupt setup */
- env->idt.base = h2g(idt_table);
- env->idt.limit = sizeof(idt_table) - 1;
+#ifndef TARGET_ABI32
+ env->idt.limit = 511;
+#else
+ env->idt.limit = 255;
+#endif
+ env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
+ PROT_READ|PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
+ idt_table = g2h(env->idt.base);
set_idt(0, 0);
set_idt(1, 0);
set_idt(2, 0);
@@ -2492,9 +2497,11 @@
/* linux segment setup */
{
uint64_t *gdt_table;
- gdt_table = qemu_mallocz(sizeof(uint64_t) * TARGET_GDT_ENTRIES);
- env->gdt.base = h2g((unsigned long)gdt_table);
+ env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
+ PROT_READ|PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
+ gdt_table = g2h(env->gdt.base);
#ifdef TARGET_ABI32
write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
Modified: trunk/linux-user/syscall.c
===================================================================
--- trunk/linux-user/syscall.c 2008-11-10 01:34:27 UTC (rev 5665)
+++ trunk/linux-user/syscall.c 2008-11-10 02:55:33 UTC (rev 5666)
@@ -2565,12 +2565,16 @@
}
/* allocate the LDT */
if (!ldt_table) {
- ldt_table = malloc(TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
- if (!ldt_table)
+ env->ldt.base = target_mmap(0,
+ TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE,
+ PROT_READ|PROT_WRITE,
+ MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
+ if (env->ldt.base == -1)
return -TARGET_ENOMEM;
- memset(ldt_table, 0, TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
- env->ldt.base = h2g((unsigned long)ldt_table);
+ memset(g2h(env->ldt.base), 0,
+ TARGET_LDT_ENTRIES * TARGET_LDT_ENTRY_SIZE);
env->ldt.limit = 0xffff;
+ ldt_table = g2h(env->ldt.base);
}
/* NOTE: same code as Linux kernel */
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