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eglibc-2.14.diff
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eglibc-2.14.diff
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diff -rup eglibc-2.14.orig/libc/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h eglibc-2.14/libc/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h
--- eglibc-2.14.orig/libc/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h 2012-06-29 15:42:49.000000000 -0700
+++ eglibc-2.14/libc/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h 2012-06-29 15:25:53.000000000 -0700
@@ -557,6 +557,17 @@ LLL_STUB_UNWIND_INFO_END
#define lll_islocked(futex) \
(futex != LLL_LOCK_INITIALIZER)
+#define DUNE_SYSCALL \
+ "push %%rax\n\t" \
+ "mov %%cs, %%rax\n\t" \
+ "test $3, %%rax\n\t" \
+ "pop %%rax\n\t" \
+ "jz 69f\n\t" \
+ "syscall\n\t" \
+ "jmp 70f\n\t" \
+ "69:" \
+ "vmcall\n\t" \
+ "70:"
/* The kernel notifies a process with uses CLONE_CLEARTID via futex
wakeup when the clone terminates. The memory location contains the
@@ -571,7 +582,7 @@ LLL_STUB_UNWIND_INFO_END
if (_tid != 0) \
__asm __volatile ("xorq %%r10, %%r10\n\t" \
"1:\tmovq %2, %%rax\n\t" \
- "syscall\n\t" \
+ DUNE_SYSCALL \
"cmpl $0, (%%rdi)\n\t" \
"jne 1b" \
: "=&a" (__ignore) \
diff -rup eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/clone.S eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/clone.S
--- eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/clone.S 2012-06-29 15:42:39.000000000 -0700
+++ eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/clone.S 2012-06-18 14:49:49.000000000 -0700
@@ -79,7 +79,16 @@ ENTRY (BP_SYM (__clone))
/* End FDE now, because in the child the unwind info will be
wrong. */
cfi_endproc;
+ push %rax
+ mov %cs, %rax
+ test $3, %rax
+ pop %rax
+ jnz 1f
+ vmcall
+ jmp 2f
+1:
syscall
+2:
testq %rax,%rax
jl SYSCALL_ERROR_LABEL
@@ -103,7 +112,16 @@ L(thread_start):
movl $-1, %eax
jne 2f
movl $SYS_ify(getpid), %eax
+ push %rax
+ mov %cs, %rax
+ test $3, %rax
+ pop %rax
+ jnz 3f
+ vmcall
+ jmp 4f
+3:
syscall
+4:
2: movl %eax, %fs:PID
movl %eax, %fs:TID
1:
diff -rup eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/getcontext.S eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/getcontext.S
--- eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/getcontext.S 2012-06-29 15:42:39.000000000 -0700
+++ eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/getcontext.S 2012-06-18 14:49:49.000000000 -0700
@@ -76,7 +76,16 @@ ENTRY(__getcontext)
#endif
movl $_NSIG8,%r10d
movl $__NR_rt_sigprocmask, %eax
- syscall
+ push %rax
+ mov %cs, %rax
+ test $3, %rax
+ pop %rax
+ jnz 1f
+ vmcall
+ jmp 2f
+1:
+ syscall
+2:
cmpq $-4095, %rax /* Check %rax for error. */
jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
diff -rup eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/setcontext.S eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/setcontext.S
--- eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/setcontext.S 2012-06-29 15:42:39.000000000 -0700
+++ eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/setcontext.S 2012-06-18 14:49:49.000000000 -0700
@@ -44,7 +44,16 @@ ENTRY(__setcontext)
movl $SIG_SETMASK, %edi
movl $_NSIG8,%r10d
movl $__NR_rt_sigprocmask, %eax
- syscall
+ push %rax
+ mov %cs, %rax
+ test $3, %rax
+ pop %rax
+ jnz 1f
+ vmcall
+ jmp 2f
+1:
+ syscall
+2:
popq %rdi /* Reload %rdi, adjust stack. */
cfi_adjust_cfa_offset(-8)
cmpq $-4095, %rax /* Check %rax for error. */
diff -rup eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/swapcontext.S eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/swapcontext.S
--- eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/swapcontext.S 2012-06-29 15:42:39.000000000 -0700
+++ eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/swapcontext.S 2012-06-18 14:49:49.000000000 -0700
@@ -76,7 +76,16 @@ ENTRY(__swapcontext)
movl $SIG_SETMASK, %edi
movl $_NSIG8,%r10d
movl $__NR_rt_sigprocmask, %eax
- syscall
+ push %rax
+ mov %cs, %rax
+ test $3, %rax
+ pop %rax
+ jnz 1f
+ vmcall
+ jmp 2f
+1:
+ syscall
+2:
cmpq $-4095, %rax /* Check %rax for error. */
jae SYSCALL_ERROR_LABEL /* Jump to error handler if error. */
diff -rup eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/sysdep.h eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/sysdep.h
--- eglibc-2.14.orig/libc/sysdeps/unix/sysv/linux/x86_64/sysdep.h 2012-06-29 15:42:39.000000000 -0700
+++ eglibc-2.14/libc/sysdeps/unix/sysv/linux/x86_64/sysdep.h 2012-06-18 14:49:49.000000000 -0700
@@ -208,7 +208,16 @@
# define DO_CALL(syscall_name, args) \
DOARGS_##args \
movl $SYS_ify (syscall_name), %eax; \
- syscall;
+ push %rax; \
+ mov %cs, %rax; \
+ test $3, %rax; \
+ pop %rax; \
+ jnz 1f; \
+ vmcall; \
+ jmp 2f; \
+1: \
+ syscall; \
+2:
# define DOARGS_0 /* nothing */
# define DOARGS_1 /* nothing */
@@ -241,7 +250,16 @@
LOAD_ARGS_##nr (args) \
LOAD_REGS_##nr \
asm volatile ( \
+ "push %%rax\n\t" \
+ "mov %%cs, %%rax\n\t" \
+ "test $3, %%rax\n\t" \
+ "pop %%rax\n\t" \
+ "jz 1f\n\t" \
"syscall\n\t" \
+ "jmp 2f\n\t" \
+ "1:" \
+ "vmcall\n\t" \
+ "2:" \
: "=a" (resultvar) \
: "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \
(long int) resultvar; })