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Message-Id: <20071220120003.9DE5B26F98D@magilla.localdomain>
Date: Thu, 20 Dec 2007 04:00:03 -0800 (PST)
From: Roland McGrath <roland@...hat.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH -mm 36/43] x86 user_regset_view
This defines task_user_regset_view and the tables
describing the x86 user_regset layouts for 32 and 64.
Signed-off-by: Roland McGrath <roland@...hat.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/kernel/ptrace.c | 87 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 87 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index c520ad7..ede27e9 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -15,6 +15,7 @@
#include <linux/ptrace.h>
#include <linux/regset.h>
#include <linux/user.h>
+#include <linux/elf.h>
#include <linux/security.h>
#include <linux/audit.h>
#include <linux/seccomp.h>
@@ -32,6 +33,14 @@
#include <asm/proto.h>
#include <asm/ds.h>
+#include "tls.h"
+
+enum x86_regset {
+ REGSET_GENERAL,
+ REGSET_FP,
+ REGSET_XFP,
+ REGSET_TLS,
+};
/*
* does not yet catch signals sent when the child dies.
@@ -1336,6 +1345,84 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data)
#endif /* CONFIG_IA32_EMULATION */
+#ifdef CONFIG_X86_64
+
+static const struct user_regset x86_64_regsets[] = {
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = sizeof(struct user_regs_struct) / sizeof(long),
+ .size = sizeof(long), .align = sizeof(long),
+ .get = genregs_get, .set = genregs_set
+ },
+ [REGSET_FP] = {
+ .core_note_type = NT_PRFPREG,
+ .n = sizeof(struct user_i387_struct) / sizeof(long),
+ .size = sizeof(long), .align = sizeof(long),
+ .active = xfpregs_active, .get = xfpregs_get, .set = xfpregs_set
+ },
+};
+
+static const struct user_regset_view user_x86_64_view = {
+ .name = "x86_64", .e_machine = EM_X86_64,
+ .regsets = x86_64_regsets, .n = ARRAY_SIZE(x86_64_regsets)
+};
+
+#else /* CONFIG_X86_32 */
+
+#define user_regs_struct32 user_regs_struct
+#define genregs32_get genregs_get
+#define genregs32_set genregs_set
+
+#endif /* CONFIG_X86_64 */
+
+#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
+static const struct user_regset x86_32_regsets[] = {
+ [REGSET_GENERAL] = {
+ .core_note_type = NT_PRSTATUS,
+ .n = sizeof(struct user_regs_struct32) / sizeof(u32),
+ .size = sizeof(u32), .align = sizeof(u32),
+ .get = genregs32_get, .set = genregs32_set
+ },
+ [REGSET_FP] = {
+ .core_note_type = NT_PRFPREG,
+ .n = sizeof(struct user_i387_struct) / sizeof(u32),
+ .size = sizeof(u32), .align = sizeof(u32),
+ .active = fpregs_active, .get = fpregs_get, .set = fpregs_set
+ },
+ [REGSET_XFP] = {
+ .core_note_type = NT_PRXFPREG,
+ .n = sizeof(struct user_i387_struct) / sizeof(u32),
+ .size = sizeof(u32), .align = sizeof(u32),
+ .active = xfpregs_active, .get = xfpregs_get, .set = xfpregs_set
+ },
+ [REGSET_TLS] = {
+ .n = GDT_ENTRY_TLS_ENTRIES, .bias = GDT_ENTRY_TLS_MIN,
+ .size = sizeof(struct user_desc),
+ .align = sizeof(struct user_desc),
+ .active = regset_tls_active,
+ .get = regset_tls_get, .set = regset_tls_set
+ },
+};
+
+static const struct user_regset_view user_x86_32_view = {
+ .name = "i386", .e_machine = EM_386,
+ .regsets = x86_32_regsets, .n = ARRAY_SIZE(x86_32_regsets)
+};
+#endif
+
+const struct user_regset_view *task_user_regset_view(struct task_struct *task)
+{
+#ifdef CONFIG_IA32_EMULATION
+ if (test_tsk_thread_flag(task, TIF_IA32))
+#endif
+#if defined CONFIG_X86_32 || defined CONFIG_IA32_EMULATION
+ return &user_x86_32_view;
+#endif
+#ifdef CONFIG_X86_64
+ return &user_x86_64_view;
+#endif
+}
+
#ifdef CONFIG_X86_32
void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code)
--
1.5.3.6
--
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