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|
Index: qemu/linux-user/main.c
===================================================================
--- qemu.orig/linux-user/main.c 2007-06-29 10:47:58.000000000 +0000
+++ qemu/linux-user/main.c 2007-06-29 10:47:58.000000000 +0000
@@ -156,7 +156,7 @@
p[1] = tswapl(e2);
}
-uint64_t gdt_table[6];
+uint64_t gdt_table[9];
uint64_t idt_table[256];
/* only dpl matters as we do only user space emulation */
@@ -1768,7 +1768,11 @@
int optind;
const char *r;
int gdbstub_port = 0;
-
+ char *assume_kernel = getenv("QEMU_ASSUME_KERNEL");
+
+ if (assume_kernel)
+ setenv("LD_ASSUME_KERNEL", assume_kernel, 1);
+
if (argc <= 1)
usage();
Index: qemu/linux-user/syscall.c
===================================================================
--- qemu.orig/linux-user/syscall.c 2007-06-29 10:47:58.000000000 +0000
+++ qemu/linux-user/syscall.c 2007-06-29 10:53:44.000000000 +0000
@@ -60,6 +60,7 @@
#define tchars host_tchars /* same as target */
#define ltchars host_ltchars /* same as target */
+#include <linux/futex.h>
#include <linux/termios.h>
#include <linux/unistd.h>
#include <linux/utsname.h>
@@ -2122,6 +2123,80 @@
return ret;
}
+int do_set_thread_area(CPUX86State *env, target_ulong ptr)
+{
+ uint64_t *gdt_table = g2h(env->gdt.base);
+ struct target_modify_ldt_ldt_s ldt_info;
+ struct target_modify_ldt_ldt_s *target_ldt_info;
+ int seg_32bit, contents, read_exec_only, limit_in_pages;
+ int seg_not_present, useable;
+ uint32_t *lp, entry_1, entry_2;
+ int i;
+
+ lock_user_struct(target_ldt_info, ptr, 1);
+ ldt_info.entry_number = tswap32(target_ldt_info->entry_number);
+ ldt_info.base_addr = tswapl(target_ldt_info->base_addr);
+ ldt_info.limit = tswap32(target_ldt_info->limit);
+ ldt_info.flags = tswap32(target_ldt_info->flags);
+ if (ldt_info.entry_number == -1) {
+ for (i=6; i<8; i++)
+ if (gdt_table[i] == 0) {
+ ldt_info.entry_number = i;
+ target_ldt_info->entry_number = tswap32(i);
+ break;
+ }
+ }
+ unlock_user_struct(target_ldt_info, ptr, 0);
+
+ if (ldt_info.entry_number < 6 || ldt_info.entry_number > 8)
+ return -EINVAL;
+ seg_32bit = ldt_info.flags & 1;
+ contents = (ldt_info.flags >> 1) & 3;
+ read_exec_only = (ldt_info.flags >> 3) & 1;
+ limit_in_pages = (ldt_info.flags >> 4) & 1;
+ seg_not_present = (ldt_info.flags >> 5) & 1;
+ useable = (ldt_info.flags >> 6) & 1;
+
+ if (contents == 3) {
+ if (seg_not_present == 0)
+ return -EINVAL;
+ }
+
+ /* NOTE: same code as Linux kernel */
+ /* Allow LDTs to be cleared by the user. */
+ if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
+ if ((contents == 0 &&
+ read_exec_only == 1 &&
+ seg_32bit == 0 &&
+ limit_in_pages == 0 &&
+ seg_not_present == 1 &&
+ useable == 0 )) {
+ entry_1 = 0;
+ entry_2 = 0;
+ goto install;
+ }
+ }
+
+ entry_1 = ((ldt_info.base_addr & 0x0000ffff) << 16) |
+ (ldt_info.limit & 0x0ffff);
+ entry_2 = (ldt_info.base_addr & 0xff000000) |
+ ((ldt_info.base_addr & 0x00ff0000) >> 16) |
+ (ldt_info.limit & 0xf0000) |
+ ((read_exec_only ^ 1) << 9) |
+ (contents << 10) |
+ ((seg_not_present ^ 1) << 15) |
+ (seg_32bit << 22) |
+ (limit_in_pages << 23) |
+ (useable << 20) |
+ 0x7000;
+
+ /* Install the new entry ... */
+install:
+ lp = (uint32_t *)(gdt_table + ldt_info.entry_number);
+ lp[0] = tswap32(entry_1);
+ lp[1] = tswap32(entry_2);
+ return 0;
+}
#endif /* defined(TARGET_I386) */
/* this stack is the equivalent of the kernel stack associated with a
@@ -2154,15 +2229,20 @@
TaskState *ts;
uint8_t *new_stack;
CPUState *new_env;
+#if defined(TARGET_I386)
+ uint64_t *new_gdt_table;
+#endif
#ifdef USE_NPTL
unsigned int nptl_flags;
if (flags & CLONE_PARENT_SETTID)
*parent_tidptr = gettid();
#endif
-
+
if (flags & CLONE_VM) {
ts = malloc(sizeof(TaskState) + NEW_STACK_SIZE);
+ if (!ts)
+ return -ENOMEM;
memset(ts, 0, sizeof(TaskState));
new_stack = ts->stack;
ts->used = 1;
@@ -2174,6 +2254,29 @@
#if defined(TARGET_I386)
if (!newsp)
newsp = env->regs[R_ESP];
+ new_gdt_table = malloc(9 * 8);
+ if (!new_gdt_table) {
+ free(new_env);
+ return -ENOMEM;
+ }
+ /* Copy main GDT table from parent, but clear TLS entries */
+ memcpy(new_gdt_table, g2h(env->gdt.base), 6 * 8);
+ memset(&new_gdt_table[6], 0, 3 * 8);
+ new_env->gdt.base = h2g(new_gdt_table);
+ if (flags & 0x00080000 /* CLONE_SETTLS */) {
+ ret = do_set_thread_area(new_env, new_env->regs[R_ESI]);
+ if (ret) {
+ free(new_gdt_table);
+ free(new_env);
+ return ret;
+ }
+ }
+ cpu_x86_load_seg(env, R_CS, new_env->regs[R_CS]);
+ cpu_x86_load_seg(env, R_DS, new_env->regs[R_DS]);
+ cpu_x86_load_seg(env, R_ES, new_env->regs[R_ES]);
+ cpu_x86_load_seg(env, R_SS, new_env->regs[R_SS]);
+ cpu_x86_load_seg(env, R_FS, new_env->regs[R_FS]);
+ cpu_x86_load_seg(env, R_GS, new_env->regs[R_GS]);
new_env->regs[R_ESP] = newsp;
new_env->regs[R_EAX] = 0;
#elif defined(TARGET_ARM)
@@ -2517,6 +2620,68 @@
unlock_user_struct(target_ts, target_addr, 1);
}
+static long do_futex(target_ulong uaddr, int op, uint32_t val,
+ target_ulong utime, target_ulong uaddr2,
+ uint32_t val3)
+{
+ struct timespec host_utime;
+ unsigned long val2 = utime;
+
+ if (utime && (op == FUTEX_WAIT || op == FUTEX_LOCK_PI)) {
+ target_to_host_timespec(&host_utime, utime);
+ val2 = (unsigned long)&host_utime;
+ }
+
+#ifdef BSWAP_NEEDED
+ switch(op) {
+ case FUTEX_CMP_REQUEUE:
+ val3 = tswap32(val3);
+ case FUTEX_REQUEUE:
+ val2 = tswap32(val2);
+ case FUTEX_WAIT:
+ case FUTEX_WAKE:
+ val = tswap32(val);
+ case FUTEX_LOCK_PI: /* This one's icky, but comes out OK */
+ case FUTEX_UNLOCK_PI:
+ break;
+ default:
+ gemu_log("qemu: Unsupported futex op %d\n", op);
+ return -ENOSYS;
+ }
+#if 0 /* No, it's worse than this */
+ if (op == FUTEX_WAKE_OP) {
+ /* Need to munge the secondary operation (val3) */
+ val3 = tswap32(val3);
+ int op2 = (val3 >> 28) & 7;
+ int cmp = (val3 >> 24) & 15;
+ int oparg = (val3 << 8) >> 20;
+ int cmparg = (val3 << 20) >> 20;
+ int shift = val3 & (FUTEX_OP_OPARG_SHIFT << 28);
+
+ if (shift)
+ oparg = (oparg & 7) + 24 - (oparg & 24);
+ else oparg =
+ if (op2 == FUTEX_OP_ADD) {
+ gemu_log("qemu: Unsupported wrong-endian FUTEX_OP_ADD\n");
+ return -ENOSYS;
+ }
+ if (cmparg == FUTEX_OP_CMP_LT || cmparg == FUTEX_OP_CMP_GE ||
+ cmparg == FUTEX_OP_CMP_LE || cmparg == FUTEX_OP_CMP_GT) {
+ gemu_log("qemu: Unsupported wrong-endian futex cmparg %d\n", cmparg);
+ return -ENOSYS;
+ }
+ val3 = shift | (op2<<28) | (cmp<<24) | (oparg<<12) | cmparg;
+ }
+#endif
+#endif
+ return syscall(__NR_futex, g2h(uaddr), op, val, val2, g2h(uaddr2), val3);
+}
+
+int do_set_tid_address(target_ulong tidptr)
+{
+ return syscall(__NR_set_tid_address, g2h(tidptr));
+}
+
long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6)
{
@@ -2534,7 +2699,7 @@
_mcleanup();
#endif
gdb_exit(cpu_env, arg1);
- /* XXX: should free thread stack and CPU env */
+ /* XXX: should free thread stack, GDT and CPU env */
_exit(arg1);
ret = 0; /* avoid warning */
break;
@@ -4642,6 +4807,9 @@
((CPUMIPSState *) cpu_env)->tls_value = arg1;
ret = 0;
break;
+#elif TARGET_i386
+ ret = get_errno(do_set_thread_area(cpu_env, arg1));
+ break;
#else
goto unimplemented_nowarn;
#endif
@@ -4655,6 +4823,21 @@
goto unimplemented_nowarn;
#endif
+#ifdef TARGET_NR_futex
+ case TARGET_NR_futex:
+ ret = get_errno(do_futex(arg1, arg2, arg3, arg4, arg5, arg6));
+ break;
+#endif
+#ifdef TARGET_NR_set_tid_address
+ case TARGET_NR_set_tid_address:
+ ret = get_errno(do_set_tid_address(arg1));
+ break;
+#endif
+#ifdef TARGET_NR_set_robust_list
+ case TARGET_NR_set_robust_list:
+ goto unimplemented_nowarn;
+#endif
+
#ifdef TARGET_NR_clock_gettime
case TARGET_NR_clock_gettime:
{
@@ -4678,12 +4861,6 @@
}
#endif
-#if defined(TARGET_NR_set_tid_address) && defined(__NR_set_tid_address)
- case TARGET_NR_set_tid_address:
- ret = get_errno(set_tid_address((int *) arg1));
- break;
-#endif
-
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);
|
