220 lines
7.3 KiB
Diff
220 lines
7.3 KiB
Diff
---
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linux-user/main.c | 7 ++-
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linux-user/syscall.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++-----
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2 files changed, 111 insertions(+), 10 deletions(-)
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Index: qemu/linux-user/main.c
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===================================================================
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--- qemu.orig/linux-user/main.c 2007-12-03 19:34:09.000000000 +0000
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+++ qemu/linux-user/main.c 2007-12-03 23:44:45.000000000 +0000
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@@ -391,7 +391,7 @@ do_kernel_trap(CPUARMState *env)
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cpu_unlock();
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break;
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case 0xffff0fe0: /* __kernel_get_tls */
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- env->regs[0] = env->cp15.c13_tls;
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+ env->regs[0] = env->cp15.c13_tls2;
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break;
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default:
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return 1;
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@@ -2037,6 +2037,11 @@ int main(int argc, char **argv)
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int drop_ld_preload = 0, environ_count = 0;
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char **target_environ, **wrk, **dst;
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+ char *assume_kernel = getenv("QEMU_ASSUME_KERNEL");
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+
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+ if (assume_kernel)
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+ setenv("LD_ASSUME_KERNEL", assume_kernel, 1);
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+
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if (argc <= 1)
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usage();
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Index: qemu/linux-user/syscall.c
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===================================================================
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--- qemu.orig/linux-user/syscall.c 2007-12-03 19:34:09.000000000 +0000
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+++ qemu/linux-user/syscall.c 2007-12-03 23:46:54.000000000 +0000
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@@ -61,6 +61,7 @@
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#define tchars host_tchars /* same as target */
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#define ltchars host_ltchars /* same as target */
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+#include <linux/futex.h>
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#include <linux/termios.h>
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#include <linux/unistd.h>
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#include <linux/utsname.h>
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@@ -2694,7 +2695,6 @@ abi_long do_arch_prctl(CPUX86State *env,
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return 0;
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}
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#endif
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-
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#endif /* defined(TARGET_I386) */
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/* this stack is the equivalent of the kernel stack associated with a
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@@ -2729,16 +2729,19 @@ int do_fork(CPUState *env, unsigned int
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TaskState *ts;
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uint8_t *new_stack;
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CPUState *new_env;
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-
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+#if defined(TARGET_I386)
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+ uint64_t *new_gdt_table;
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+#endif
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#ifdef USE_NPTL
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unsigned int nptl_flags;
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if (flags & CLONE_PARENT_SETTID)
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*parent_tidptr = gettid();
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#endif
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-
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if (flags & CLONE_VM) {
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ts = malloc(sizeof(TaskState) + NEW_STACK_SIZE);
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+ if (!ts)
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+ return -ENOMEM;
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memset(ts, 0, sizeof(TaskState));
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new_stack = ts->stack;
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ts->used = 1;
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@@ -2750,6 +2753,29 @@ int do_fork(CPUState *env, unsigned int
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#if defined(TARGET_I386)
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if (!newsp)
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newsp = env->regs[R_ESP];
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+ new_gdt_table = malloc(9 * 8);
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+ if (!new_gdt_table) {
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+ free(new_env);
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+ return -ENOMEM;
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+ }
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+ /* Copy main GDT table from parent, but clear TLS entries */
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+ memcpy(new_gdt_table, g2h(env->gdt.base), 6 * 8);
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+ memset(&new_gdt_table[6], 0, 3 * 8);
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+ new_env->gdt.base = h2g(new_gdt_table);
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+ if (flags & 0x00080000 /* CLONE_SETTLS */) {
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+ ret = do_set_thread_area(new_env, new_env->regs[R_ESI]);
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+ if (ret) {
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+ free(new_gdt_table);
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+ free(new_env);
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+ return ret;
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+ }
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+ }
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+ cpu_x86_load_seg(env, R_CS, new_env->regs[R_CS]);
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+ cpu_x86_load_seg(env, R_DS, new_env->regs[R_DS]);
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+ cpu_x86_load_seg(env, R_ES, new_env->regs[R_ES]);
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+ cpu_x86_load_seg(env, R_SS, new_env->regs[R_SS]);
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+ cpu_x86_load_seg(env, R_FS, new_env->regs[R_FS]);
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+ cpu_x86_load_seg(env, R_GS, new_env->regs[R_GS]);
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new_env->regs[R_ESP] = newsp;
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new_env->regs[R_EAX] = 0;
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#elif defined(TARGET_ARM)
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@@ -3121,6 +3147,68 @@ static inline abi_long host_to_target_ti
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unlock_user_struct(target_ts, target_addr, 1);
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}
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+static long do_futex(target_ulong uaddr, int op, uint32_t val,
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+ target_ulong utime, target_ulong uaddr2,
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+ uint32_t val3)
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+{
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+ struct timespec host_utime;
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+ unsigned long val2 = utime;
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+
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+ if (utime && (op == FUTEX_WAIT || op == FUTEX_LOCK_PI)) {
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+ target_to_host_timespec(&host_utime, utime);
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+ val2 = (unsigned long)&host_utime;
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+ }
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+
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+#ifdef BSWAP_NEEDED
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+ switch(op) {
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+ case FUTEX_CMP_REQUEUE:
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+ val3 = tswap32(val3);
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+ case FUTEX_REQUEUE:
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+ val2 = tswap32(val2);
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+ case FUTEX_WAIT:
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+ case FUTEX_WAKE:
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+ val = tswap32(val);
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+ case FUTEX_LOCK_PI: /* This one's icky, but comes out OK */
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+ case FUTEX_UNLOCK_PI:
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+ break;
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+ default:
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+ gemu_log("qemu: Unsupported futex op %d\n", op);
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+ return -ENOSYS;
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+ }
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+#if 0 /* No, it's worse than this */
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+ if (op == FUTEX_WAKE_OP) {
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+ /* Need to munge the secondary operation (val3) */
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+ val3 = tswap32(val3);
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+ int op2 = (val3 >> 28) & 7;
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+ int cmp = (val3 >> 24) & 15;
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+ int oparg = (val3 << 8) >> 20;
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+ int cmparg = (val3 << 20) >> 20;
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+ int shift = val3 & (FUTEX_OP_OPARG_SHIFT << 28);
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+
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+ if (shift)
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+ oparg = (oparg & 7) + 24 - (oparg & 24);
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+ else oparg =
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+ if (op2 == FUTEX_OP_ADD) {
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+ gemu_log("qemu: Unsupported wrong-endian FUTEX_OP_ADD\n");
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+ return -ENOSYS;
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+ }
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+ if (cmparg == FUTEX_OP_CMP_LT || cmparg == FUTEX_OP_CMP_GE ||
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+ cmparg == FUTEX_OP_CMP_LE || cmparg == FUTEX_OP_CMP_GT) {
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+ gemu_log("qemu: Unsupported wrong-endian futex cmparg %d\n", cmparg);
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+ return -ENOSYS;
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+ }
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+ val3 = shift | (op2<<28) | (cmp<<24) | (oparg<<12) | cmparg;
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+ }
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+#endif
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+#endif
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+ return syscall(__NR_futex, g2h(uaddr), op, val, val2, g2h(uaddr2), val3);
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+}
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+
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+int do_set_tid_address(target_ulong tidptr)
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+{
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+ return syscall(__NR_set_tid_address, g2h(tidptr));
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+}
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+
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/* do_syscall() should always have a single exit point at the end so
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that actions, such as logging of syscall results, can be performed.
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All errnos that do_syscall() returns must be -TARGET_<errcode>. */
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@@ -3145,7 +3233,7 @@ abi_long do_syscall(void *cpu_env, int n
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_mcleanup();
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#endif
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gdb_exit(cpu_env, arg1);
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- /* XXX: should free thread stack and CPU env */
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+ /* XXX: should free thread stack, GDT and CPU env */
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_exit(arg1);
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ret = 0; /* avoid warning */
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break;
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@@ -5569,6 +5657,9 @@ abi_long do_syscall(void *cpu_env, int n
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#elif defined(TARGET_I386) && defined(TARGET_ABI32)
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ret = do_set_thread_area(cpu_env, arg1);
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break;
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+#elif TARGET_i386
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+ ret = get_errno(do_set_thread_area(cpu_env, arg1));
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+ break;
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#else
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goto unimplemented_nowarn;
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#endif
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@@ -5586,6 +5677,16 @@ abi_long do_syscall(void *cpu_env, int n
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goto unimplemented_nowarn;
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#endif
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+#ifdef TARGET_NR_futex
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+ case TARGET_NR_futex:
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+ ret = get_errno(do_futex(arg1, arg2, arg3, arg4, arg5, arg6));
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+ break;
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+#endif
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+#ifdef TARGET_NR_set_robust_list
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+ case TARGET_NR_set_robust_list:
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+ goto unimplemented_nowarn;
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+#endif
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+
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#ifdef TARGET_NR_clock_gettime
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case TARGET_NR_clock_gettime:
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{
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@@ -5627,11 +5728,6 @@ abi_long do_syscall(void *cpu_env, int n
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break;
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#endif
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-#ifdef TARGET_NR_set_robust_list
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- case TARGET_NR_set_robust_list:
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- goto unimplemented_nowarn;
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-#endif
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-
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#if defined(TARGET_NR_utimensat) && defined(__NR_utimensat)
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case TARGET_NR_utimensat:
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{
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