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Commit 070459d9 authored by Roland McGrath's avatar Roland McGrath Committed by Ingo Molnar
Browse files

x86: 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: default avatarRoland McGrath <roland@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 91e7b707

arch/x86/kernel/ptrace.c

+87 −0
Original line number Diff line number Diff line
@@ -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.
@@ -1335,6 +1344,84 @@ 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)