From: Brian Gerst <bgerst@quark.didntduck.org>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Linux-Kernel <linux-kernel@vger.kernel.org>
Subject: [PATCH] asm offsets for i386
Date: Thu, 27 Mar 2003 08:51:58 -0500 [thread overview]
Message-ID: <3E8301FE.3000808@quark.didntduck.org> (raw)
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[Resend]
This patch creates an asm-offsets.c file for i386, and removes the
hardcoded constants from several asm files.
--
Brian Gerst
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diff -urN linux-2.5.65-bk1/arch/i386/kernel/asm-offsets.c linux/arch/i386/kernel/asm-offsets.c
--- linux-2.5.65-bk1/arch/i386/kernel/asm-offsets.c 1969-12-31 19:00:00.000000000 -0500
+++ linux/arch/i386/kernel/asm-offsets.c 2003-03-19 14:59:27.000000000 -0500
@@ -0,0 +1,60 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed to extract
+ * and format the required data.
+ */
+
+#include <linux/thread_info.h>
+#include <linux/ptrace.h>
+#include <asm/processor.h>
+#include <asm/fixmap.h>
+
+#define DEFINE(sym, val) \
+ asm volatile("\n->" #sym " %0 " #val : : "i" (val))
+
+#define ADDR(sym, val) \
+ asm volatile("\n->" #sym " %0 " #val : : "m" (val))
+
+#define BLANK() asm volatile("\n->" : : )
+
+void foo(void)
+{
+ DEFINE(TI_TASK, offsetof(struct thread_info, task));
+ DEFINE(TI_EXEC_DOMAIN, offsetof(struct thread_info, exec_domain));
+ DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
+ DEFINE(TI_STATUS, offsetof(struct thread_info, status));
+ DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
+ DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
+ DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
+ DEFINE(TI_RESTART_BLOCK, offsetof(struct thread_info, restart_block));
+ BLANK();
+
+ DEFINE(EBX, offsetof(struct pt_regs, ebx));
+ DEFINE(ECX, offsetof(struct pt_regs, ecx));
+ DEFINE(EDX, offsetof(struct pt_regs, edx));
+ DEFINE(ESI, offsetof(struct pt_regs, esi));
+ DEFINE(EDI, offsetof(struct pt_regs, edi));
+ DEFINE(EBP, offsetof(struct pt_regs, ebp));
+ DEFINE(EAX, offsetof(struct pt_regs, eax));
+ DEFINE(DS, offsetof(struct pt_regs, xds));
+ DEFINE(ES, offsetof(struct pt_regs, xes));
+ DEFINE(ORIG_EAX, offsetof(struct pt_regs, orig_eax));
+ DEFINE(EIP, offsetof(struct pt_regs, eip));
+ DEFINE(CS, offsetof(struct pt_regs, xcs));
+ DEFINE(EFLAGS, offsetof(struct pt_regs, eflags));
+ DEFINE(OLDESP, offsetof(struct pt_regs, esp));
+ DEFINE(OLDSS, offsetof(struct pt_regs, xss));
+ BLANK();
+
+ ADDR(X86, new_cpu_data.x86);
+ ADDR(X86_VENDOR, new_cpu_data.x86_vendor);
+ ADDR(X86_MODEL, new_cpu_data.x86_model);
+ ADDR(X86_MASK, new_cpu_data.x86_mask);
+ ADDR(X86_HARD_MATH, new_cpu_data.hard_math);
+ ADDR(X86_CPUID, new_cpu_data.cpuid_level);
+ ADDR(X86_CAPABILITY, new_cpu_data.x86_capability[0]);
+ ADDR(X86_VENDOR_ID, new_cpu_data.x86_vendor_id[0]);
+ BLANK();
+
+ DEFINE(SYSENTER_BASE, __fix_to_virt(FIX_VSYSCALL));
+}
diff -urN linux-2.5.65-bk1/arch/i386/kernel/entry.S linux/arch/i386/kernel/entry.S
--- linux-2.5.65-bk1/arch/i386/kernel/entry.S 2003-03-17 18:04:44.000000000 -0500
+++ linux/arch/i386/kernel/entry.S 2003-03-19 14:13:32.000000000 -0500
@@ -47,24 +47,9 @@
#include <asm/segment.h>
#include <asm/smp.h>
#include <asm/page.h>
+#include <asm/asm_offsets.h>
#include "irq_vectors.h"
-EBX = 0x00
-ECX = 0x04
-EDX = 0x08
-ESI = 0x0C
-EDI = 0x10
-EBP = 0x14
-EAX = 0x18
-DS = 0x1C
-ES = 0x20
-ORIG_EAX = 0x24
-EIP = 0x28
-CS = 0x2C
-EFLAGS = 0x30
-OLDESP = 0x34
-OLDSS = 0x38
-
CF_MASK = 0x00000001
TF_MASK = 0x00000100
IF_MASK = 0x00000200
@@ -231,7 +216,7 @@
#endif
/* Points to after the "sysenter" instruction in the vsyscall page */
-#define SYSENTER_RETURN 0xffffe010
+#define SYSENTER_RETURN SYSENTER_BASE + 0x10
# sysenter call handler stub
ENTRY(sysenter_entry)
diff -urN linux-2.5.65-bk1/arch/i386/kernel/head.S linux/arch/i386/kernel/head.S
--- linux-2.5.65-bk1/arch/i386/kernel/head.S 2003-03-17 18:04:44.000000000 -0500
+++ linux/arch/i386/kernel/head.S 2003-03-19 14:23:43.000000000 -0500
@@ -16,6 +16,7 @@
#include <asm/pgtable.h>
#include <asm/desc.h>
#include <asm/cache.h>
+#include <asm/asm_offsets.h>
#define OLD_CL_MAGIC_ADDR 0x90020
#define OLD_CL_MAGIC 0xA33F
@@ -24,20 +25,6 @@
#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
/*
- * References to members of the new_cpu_data structure.
- */
-
-#define CPU_PARAMS new_cpu_data
-#define X86 CPU_PARAMS+0
-#define X86_VENDOR CPU_PARAMS+1
-#define X86_MODEL CPU_PARAMS+2
-#define X86_MASK CPU_PARAMS+3
-#define X86_HARD_MATH CPU_PARAMS+6
-#define X86_CPUID CPU_PARAMS+8
-#define X86_CAPABILITY CPU_PARAMS+12
-#define X86_VENDOR_ID CPU_PARAMS+28
-
-/*
* Initialize page tables
*/
#define INIT_PAGE_TABLES \
diff -urN linux-2.5.65-bk1/arch/i386/lib/getuser.S linux/arch/i386/lib/getuser.S
--- linux-2.5.65-bk1/arch/i386/lib/getuser.S 2002-12-24 00:19:24.000000000 -0500
+++ linux/arch/i386/lib/getuser.S 2003-03-19 13:18:42.000000000 -0500
@@ -9,6 +9,7 @@
* return value.
*/
#include <asm/thread_info.h>
+#include <asm/asm_offsets.h>
/*
diff -urN linux-2.5.65-bk1/arch/i386/Makefile linux/arch/i386/Makefile
--- linux-2.5.65-bk1/arch/i386/Makefile 2003-03-17 18:04:43.000000000 -0500
+++ linux/arch/i386/Makefile 2003-03-19 13:18:42.000000000 -0500
@@ -92,6 +92,14 @@
boot := arch/i386/boot
+prepare: include/asm-$(ARCH)/asm_offsets.h
+
+arch/$(ARCH)/kernel/asm-offsets.s: include/asm include/linux/version.h \
+ include/config/MARKER
+
+include/asm-$(ARCH)/asm_offsets.h: arch/$(ARCH)/kernel/asm-offsets.s
+ $(call filechk,gen-asm-offsets)
+
.PHONY: zImage bzImage compressed zlilo bzlilo \
zdisk bzdisk fdimage fdimage144 fdimage288 install
@@ -127,4 +135,5 @@
echo ' fdimage - Create a boot floppy image'
endef
-CLEAN_FILES += arch/$(ARCH)/boot/fdimage arch/$(ARCH)/boot/mtools.conf
+CLEAN_FILES += arch/$(ARCH)/boot/fdimage arch/$(ARCH)/boot/mtools.conf \
+ include/asm-$(ARCH)/asm_offsets.h
diff -urN linux-2.5.65-bk1/include/asm-i386/thread_info.h linux/include/asm-i386/thread_info.h
--- linux-2.5.65-bk1/include/asm-i386/thread_info.h 2003-03-17 18:04:55.000000000 -0500
+++ linux/include/asm-i386/thread_info.h 2003-03-19 13:18:42.000000000 -0500
@@ -38,18 +38,6 @@
__u8 supervisor_stack[0];
};
-#else /* !__ASSEMBLY__ */
-
-/* offsets into the thread_info struct for assembly code access */
-#define TI_TASK 0x00000000
-#define TI_EXEC_DOMAIN 0x00000004
-#define TI_FLAGS 0x00000008
-#define TI_STATUS 0x0000000C
-#define TI_CPU 0x00000010
-#define TI_PRE_COUNT 0x00000014
-#define TI_ADDR_LIMIT 0x00000018
-#define TI_RESTART_BLOCK 0x000001C
-
#endif
#define PREEMPT_ACTIVE 0x4000000
next reply other threads:[~2003-03-27 13:41 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-27 13:51 Brian Gerst [this message]
[not found] <mailman.1048773360.3585.linux-kernel2news@redhat.com>
2003-03-27 17:28 ` [PATCH] asm offsets for i386 Pete Zaitcev
2003-03-27 18:11 ` Brian Gerst
2003-03-27 19:37 ` David S. Miller
-- strict thread matches above, loose matches on Subject: below --
2003-03-21 13:50 Brian Gerst
2003-03-19 23:58 Brian Gerst
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