lib-y += usercopy_$(BITS).o getuser.o putuser.o
lib-y += memcpy_$(BITS).o
lib-$(CONFIG_SMP) += rwlock.o
+lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
lib-$(CONFIG_INSTRUCTION_DECODER) += insn.o inat.o
obj-y += msr.o msr-reg.o msr-reg-export.o
lib-y += atomic64_cx8_32.o
lib-y += checksum_32.o
lib-y += strstr_32.o
- lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += semaphore_32.o
lib-y += string_32.o
lib-y += cmpxchg.o
ifneq ($(CONFIG_X86_CMPXCHG64),y)
lib-y += thunk_64.o clear_page_64.o copy_page_64.o
lib-y += memmove_64.o memset_64.o
lib-y += copy_user_64.o copy_user_nocache_64.o
- lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem_64.o
lib-y += cmpxchg16b_emu.o
endif
+/*
+ * x86 semaphore implementation.
+ *
+ * (C) Copyright 1999 Linus Torvalds
+ *
+ * Portions Copyright 1999 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * rw semaphores implemented November 1999 by Benjamin LaHaise <bcrl@kvack.org>
+ */
+
+#include <linux/linkage.h>
+#include <asm/alternative-asm.h>
+#include <asm/dwarf2.h>
+
+#define __ASM_HALF_REG(reg) __ASM_SEL(reg, e##reg)
+#define __ASM_HALF_SIZE(inst) __ASM_SEL(inst##w, inst##l)
+
+#ifdef CONFIG_X86_32
+
+/*
+ * The semaphore operations have a special calling sequence that
+ * allow us to do a simpler in-line version of them. These routines
+ * need to convert that sequence back into the C sequence when
+ * there is contention on the semaphore.
+ *
+ * %eax contains the semaphore pointer on entry. Save the C-clobbered
+ * registers (%eax, %edx and %ecx) except %eax whish is either a return
+ * value or just clobbered..
+ */
+
+#define save_common_regs \
+ pushl_cfi %ecx; CFI_REL_OFFSET ecx, 0
+
+#define restore_common_regs \
+ popl_cfi %ecx; CFI_RESTORE ecx
+
+ /* Avoid uglifying the argument copying x86-64 needs to do. */
+ .macro movq src, dst
+ .endm
+
+#else
+
/*
* x86-64 rwsem wrappers
*
* but %rdi, %rsi, %rcx, %r8-r11 always need saving.
*/
-#include <linux/linkage.h>
-#include <asm/rwlock.h>
-#include <asm/alternative-asm.h>
-#include <asm/frame.h>
-#include <asm/dwarf2.h>
-
#define save_common_regs \
pushq_cfi %rdi; CFI_REL_OFFSET rdi, 0; \
pushq_cfi %rsi; CFI_REL_OFFSET rsi, 0; \
popq_cfi %rsi; CFI_RESTORE rsi; \
popq_cfi %rdi; CFI_RESTORE rdi
+#endif
+
/* Fix up special calling conventions */
ENTRY(call_rwsem_down_read_failed)
CFI_STARTPROC
save_common_regs
- pushq_cfi %rdx
- CFI_REL_OFFSET rdx, 0
+ __ASM_SIZE(push,_cfi) %__ASM_REG(dx)
+ CFI_REL_OFFSET __ASM_REG(dx), 0
movq %rax,%rdi
call rwsem_down_read_failed
- popq_cfi %rdx
- CFI_RESTORE rdx
+ __ASM_SIZE(pop,_cfi) %__ASM_REG(dx)
+ CFI_RESTORE __ASM_REG(dx)
restore_common_regs
ret
CFI_ENDPROC
ENTRY(call_rwsem_wake)
CFI_STARTPROC
- decl %edx /* do nothing if still outstanding active readers */
+ /* do nothing if still outstanding active readers */
+ __ASM_HALF_SIZE(dec) %__ASM_HALF_REG(dx)
jnz 1f
save_common_regs
movq %rax,%rdi
CFI_ENDPROC
ENDPROC(call_rwsem_wake)
-/* Fix up special calling conventions */
ENTRY(call_rwsem_downgrade_wake)
CFI_STARTPROC
save_common_regs
- pushq_cfi %rdx
- CFI_REL_OFFSET rdx, 0
+ __ASM_SIZE(push,_cfi) %__ASM_REG(dx)
+ CFI_REL_OFFSET __ASM_REG(dx), 0
movq %rax,%rdi
call rwsem_downgrade_wake
- popq_cfi %rdx
- CFI_RESTORE rdx
+ __ASM_SIZE(pop,_cfi) %__ASM_REG(dx)
+ CFI_RESTORE __ASM_REG(dx)
restore_common_regs
ret
CFI_ENDPROC
+++ /dev/null
-/*
- * i386 semaphore implementation.
- *
- * (C) Copyright 1999 Linus Torvalds
- *
- * Portions Copyright 1999 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * rw semaphores implemented November 1999 by Benjamin LaHaise <bcrl@kvack.org>
- */
-
-#include <linux/linkage.h>
-#include <asm/frame.h>
-#include <asm/dwarf2.h>
-
-/*
- * The semaphore operations have a special calling sequence that
- * allow us to do a simpler in-line version of them. These routines
- * need to convert that sequence back into the C sequence when
- * there is contention on the semaphore.
- *
- * %eax contains the semaphore pointer on entry. Save the C-clobbered
- * registers (%eax, %edx and %ecx) except %eax whish is either a return
- * value or just clobbered..
- */
- .section .sched.text, "ax"
-
-/* Fix up special calling conventions */
-ENTRY(call_rwsem_down_read_failed)
- CFI_STARTPROC
- pushl_cfi %ecx
- CFI_REL_OFFSET ecx,0
- pushl_cfi %edx
- CFI_REL_OFFSET edx,0
- call rwsem_down_read_failed
- popl_cfi %edx
- popl_cfi %ecx
- ret
- CFI_ENDPROC
- ENDPROC(call_rwsem_down_read_failed)
-
-ENTRY(call_rwsem_down_write_failed)
- CFI_STARTPROC
- pushl_cfi %ecx
- CFI_REL_OFFSET ecx,0
- calll rwsem_down_write_failed
- popl_cfi %ecx
- ret
- CFI_ENDPROC
- ENDPROC(call_rwsem_down_write_failed)
-
-ENTRY(call_rwsem_wake)
- CFI_STARTPROC
- decw %dx /* do nothing if still outstanding active readers */
- jnz 1f
- pushl_cfi %ecx
- CFI_REL_OFFSET ecx,0
- call rwsem_wake
- popl_cfi %ecx
-1: ret
- CFI_ENDPROC
- ENDPROC(call_rwsem_wake)
-
-/* Fix up special calling conventions */
-ENTRY(call_rwsem_downgrade_wake)
- CFI_STARTPROC
- pushl_cfi %ecx
- CFI_REL_OFFSET ecx,0
- pushl_cfi %edx
- CFI_REL_OFFSET edx,0
- call rwsem_downgrade_wake
- popl_cfi %edx
- popl_cfi %ecx
- ret
- CFI_ENDPROC
- ENDPROC(call_rwsem_downgrade_wake)
git.openpandora.org / pandora-kernel.git / commitdiff