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-rw-r--r--arch/i386/kernel/Makefile2
-rw-r--r--arch/i386/kernel/semaphore.c134
-rw-r--r--arch/i386/lib/Makefile2
-rw-r--r--arch/i386/lib/semaphore.S154
-rw-r--r--arch/um/sys-i386/Makefile2
-rw-r--r--include/asm-i386/frame.i24
-rw-r--r--include/asm-um/alternative-asm.i6
-rw-r--r--include/asm-um/frame.i6
8 files changed, 193 insertions, 137 deletions
diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 5427a842e84..dab497472de 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -4,7 +4,7 @@
extra-y := head.o init_task.o vmlinux.lds
-obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o \
+obj-y := process.o signal.o entry.o traps.o irq.o \
ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
pci-dma.o i386_ksyms.o i387.o bootflag.o \
quirks.o i8237.o topology.o alternative.o i8253.o tsc.o
diff --git a/arch/i386/kernel/semaphore.c b/arch/i386/kernel/semaphore.c
deleted file mode 100644
index 98352c374c7..00000000000
--- a/arch/i386/kernel/semaphore.c
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * 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 <asm/semaphore.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..
- */
-asm(
-".section .sched.text\n"
-".align 4\n"
-".globl __down_failed\n"
-"__down_failed:\n\t"
-#if defined(CONFIG_FRAME_POINTER)
- "pushl %ebp\n\t"
- "movl %esp,%ebp\n\t"
-#endif
- "pushl %edx\n\t"
- "pushl %ecx\n\t"
- "call __down\n\t"
- "popl %ecx\n\t"
- "popl %edx\n\t"
-#if defined(CONFIG_FRAME_POINTER)
- "movl %ebp,%esp\n\t"
- "popl %ebp\n\t"
-#endif
- "ret"
-);
-
-asm(
-".section .sched.text\n"
-".align 4\n"
-".globl __down_failed_interruptible\n"
-"__down_failed_interruptible:\n\t"
-#if defined(CONFIG_FRAME_POINTER)
- "pushl %ebp\n\t"
- "movl %esp,%ebp\n\t"
-#endif
- "pushl %edx\n\t"
- "pushl %ecx\n\t"
- "call __down_interruptible\n\t"
- "popl %ecx\n\t"
- "popl %edx\n\t"
-#if defined(CONFIG_FRAME_POINTER)
- "movl %ebp,%esp\n\t"
- "popl %ebp\n\t"
-#endif
- "ret"
-);
-
-asm(
-".section .sched.text\n"
-".align 4\n"
-".globl __down_failed_trylock\n"
-"__down_failed_trylock:\n\t"
-#if defined(CONFIG_FRAME_POINTER)
- "pushl %ebp\n\t"
- "movl %esp,%ebp\n\t"
-#endif
- "pushl %edx\n\t"
- "pushl %ecx\n\t"
- "call __down_trylock\n\t"
- "popl %ecx\n\t"
- "popl %edx\n\t"
-#if defined(CONFIG_FRAME_POINTER)
- "movl %ebp,%esp\n\t"
- "popl %ebp\n\t"
-#endif
- "ret"
-);
-
-asm(
-".section .sched.text\n"
-".align 4\n"
-".globl __up_wakeup\n"
-"__up_wakeup:\n\t"
- "pushl %edx\n\t"
- "pushl %ecx\n\t"
- "call __up\n\t"
- "popl %ecx\n\t"
- "popl %edx\n\t"
- "ret"
-);
-
-/*
- * rw spinlock fallbacks
- */
-#if defined(CONFIG_SMP)
-asm(
-".section .sched.text\n"
-".align 4\n"
-".globl __write_lock_failed\n"
-"__write_lock_failed:\n\t"
- LOCK_PREFIX "addl $" RW_LOCK_BIAS_STR ",(%eax)\n"
-"1: rep; nop\n\t"
- "cmpl $" RW_LOCK_BIAS_STR ",(%eax)\n\t"
- "jne 1b\n\t"
- LOCK_PREFIX "subl $" RW_LOCK_BIAS_STR ",(%eax)\n\t"
- "jnz __write_lock_failed\n\t"
- "ret"
-);
-
-asm(
-".section .sched.text\n"
-".align 4\n"
-".globl __read_lock_failed\n"
-"__read_lock_failed:\n\t"
- LOCK_PREFIX "incl (%eax)\n"
-"1: rep; nop\n\t"
- "cmpl $1,(%eax)\n\t"
- "js 1b\n\t"
- LOCK_PREFIX "decl (%eax)\n\t"
- "js __read_lock_failed\n\t"
- "ret"
-);
-#endif
diff --git a/arch/i386/lib/Makefile b/arch/i386/lib/Makefile
index 914933e9ec3..d86a548b8d5 100644
--- a/arch/i386/lib/Makefile
+++ b/arch/i386/lib/Makefile
@@ -4,6 +4,6 @@
lib-y = checksum.o delay.o usercopy.o getuser.o putuser.o memcpy.o strstr.o \
- bitops.o
+ bitops.o semaphore.o
lib-$(CONFIG_X86_USE_3DNOW) += mmx.o
diff --git a/arch/i386/lib/semaphore.S b/arch/i386/lib/semaphore.S
new file mode 100644
index 00000000000..e16ff169639
--- /dev/null
+++ b/arch/i386/lib/semaphore.S
@@ -0,0 +1,154 @@
+/*
+ * 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/config.h>
+#include <linux/linkage.h>
+#include <asm/rwlock.h>
+#include <asm/alternative-asm.i>
+#include <asm/frame.i>
+#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
+ENTRY(__down_failed)
+ CFI_STARTPROC
+ FRAME
+ pushl %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edx,0
+ pushl %ecx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ecx,0
+ call __down
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ecx
+ popl %edx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE edx
+ ENDFRAME
+ ret
+ CFI_ENDPROC
+ END(__down_failed)
+
+ENTRY(__down_failed_interruptible)
+ CFI_STARTPROC
+ FRAME
+ pushl %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edx,0
+ pushl %ecx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ecx,0
+ call __down_interruptible
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ecx
+ popl %edx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE edx
+ ENDFRAME
+ ret
+ CFI_ENDPROC
+ END(__down_failed_interruptible)
+
+ENTRY(__down_failed_trylock)
+ CFI_STARTPROC
+ FRAME
+ pushl %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edx,0
+ pushl %ecx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ecx,0
+ call __down_trylock
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ecx
+ popl %edx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE edx
+ ENDFRAME
+ ret
+ CFI_ENDPROC
+ END(__down_failed_trylock)
+
+ENTRY(__up_wakeup)
+ CFI_STARTPROC
+ FRAME
+ pushl %edx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edx,0
+ pushl %ecx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ecx,0
+ call __up
+ popl %ecx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ecx
+ popl %edx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE edx
+ ENDFRAME
+ ret
+ CFI_ENDPROC
+ END(__up_wakeup)
+
+/*
+ * rw spinlock fallbacks
+ */
+#ifdef CONFIG_SMP
+ENTRY(__write_lock_failed)
+ CFI_STARTPROC simple
+ FRAME
+2: LOCK_PREFIX
+ addl $ RW_LOCK_BIAS,(%eax)
+1: rep; nop
+ cmpl $ RW_LOCK_BIAS,(%eax)
+ jne 1b
+ LOCK_PREFIX
+ subl $ RW_LOCK_BIAS,(%eax)
+ jnz 2b
+ ENDFRAME
+ ret
+ CFI_ENDPROC
+ END(__write_lock_failed)
+
+ENTRY(__read_lock_failed)
+ CFI_STARTPROC
+ FRAME
+2: LOCK_PREFIX
+ incl (%eax)
+1: rep; nop
+ cmpl $1,(%eax)
+ js 1b
+ LOCK_PREFIX
+ decl (%eax)
+ js 2b
+ ENDFRAME
+ ret
+ CFI_ENDPROC
+ END(__read_lock_failed)
+
+#endif
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile
index 374d61a1943..6289779ca67 100644
--- a/arch/um/sys-i386/Makefile
+++ b/arch/um/sys-i386/Makefile
@@ -4,7 +4,7 @@ obj-y = bugs.o checksum.o delay.o fault.o ksyms.o ldt.o ptrace.o \
obj-$(CONFIG_MODE_SKAS) += stub.o stub_segv.o
-subarch-obj-y = lib/bitops.o kernel/semaphore.o
+subarch-obj-y = lib/bitops.o lib/semaphore.o
subarch-obj-$(CONFIG_HIGHMEM) += mm/highmem.o
subarch-obj-$(CONFIG_MODULES) += kernel/module.o
diff --git a/include/asm-i386/frame.i b/include/asm-i386/frame.i
new file mode 100644
index 00000000000..4d68ddce18b
--- /dev/null
+++ b/include/asm-i386/frame.i
@@ -0,0 +1,24 @@
+#include <linux/config.h>
+#include <asm/dwarf2.h>
+
+/* The annotation hides the frame from the unwinder and makes it look
+ like a ordinary ebp save/restore. This avoids some special cases for
+ frame pointer later */
+#ifdef CONFIG_FRAME_POINTER
+ .macro FRAME
+ pushl %ebp
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebp,0
+ movl %esp,%ebp
+ .endm
+ .macro ENDFRAME
+ popl %ebp
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ebp
+ .endm
+#else
+ .macro FRAME
+ .endm
+ .macro ENDFRAME
+ .endm
+#endif
diff --git a/include/asm-um/alternative-asm.i b/include/asm-um/alternative-asm.i
new file mode 100644
index 00000000000..cae9faca132
--- /dev/null
+++ b/include/asm-um/alternative-asm.i
@@ -0,0 +1,6 @@
+#ifndef __UM_ALTERNATIVE_ASM_I
+#define __UM_ALTERNATIVE_ASM_I
+
+#include "asm/arch/alternative-asm.i"
+
+#endif
diff --git a/include/asm-um/frame.i b/include/asm-um/frame.i
new file mode 100644
index 00000000000..09d5dca5d92
--- /dev/null
+++ b/include/asm-um/frame.i
@@ -0,0 +1,6 @@
+#ifndef __UM_FRAME_I
+#define __UM_FRAME_I
+
+#include "asm/arch/frame.i"
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-25 17:19:50 +0000