Commit 1bbd5f21 authored by Al Viro's avatar Al Viro Committed by Richard Weinberger
Browse files

um: merge os-Linux/tls.c into arch/x86/um/os-Linux/tls.c 



it's i386-specific; moreover, analogs on other targets have
incompatible interface - PTRACE_GET_THREAD_AREA does exist
elsewhere, but struct user_desc does *not*

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarRichard Weinberger <richard@nod.at>
parent c5cc32fe

arch/um/include/shared/os.h

+0 −5
Original line number Diff line number Diff line
@@ -10,7 +10,6 @@ 
#include "irq_user.h"

#include "longjmp.h"

#include "mm_id.h"

#include "sysdep/tls.h"



#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
@@ -212,10 +211,6 @@ extern int run_helper_thread(int (*proc)(void *), void *arg, 
extern int helper_wait(int pid);





/* tls.c */

extern int os_set_thread_area(user_desc_t *info, int pid);

extern int os_get_thread_area(user_desc_t *info, int pid);



/* umid.c */

extern int umid_file_name(char *name, char *buf, int len);

extern int set_umid(char *name);

arch/um/os-Linux/Makefile

+2 −2
Original line number Diff line number Diff line
@@ -5,13 +5,13 @@ 


obj-y = aio.o execvp.o file.o helper.o irq.o main.o mem.o process.o \

	registers.o sigio.o signal.o start_up.o time.o tty.o \

	umid.o tls.o user_syms.o util.o drivers/ skas/

	umid.o user_syms.o util.o drivers/ skas/



obj-$(CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA) += elf_aux.o



USER_OBJS := $(user-objs-y) aio.o elf_aux.o execvp.o file.o helper.o irq.o \

	main.o mem.o process.o registers.o sigio.o signal.o start_up.o time.o \

	tty.o tls.o umid.o util.o

	tty.o umid.o util.o



CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)

arch/um/os-Linux/tls.c

deleted100644 → 0
+0 −35
Original line number Diff line number Diff line 
#include <errno.h>

#include <sys/ptrace.h>

#include "sysdep/tls.h"



/* TLS support - we basically rely on the host's one.*/



#ifndef PTRACE_GET_THREAD_AREA

#define PTRACE_GET_THREAD_AREA 25

#endif



#ifndef PTRACE_SET_THREAD_AREA

#define PTRACE_SET_THREAD_AREA 26

#endif



int os_set_thread_area(user_desc_t *info, int pid)

{

	int ret;



	ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,

		     (unsigned long) info);

	if (ret < 0)

		ret = -errno;

	return ret;

}



int os_get_thread_area(user_desc_t *info, int pid)

{

	int ret;



	ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,

		     (unsigned long) info);

	if (ret < 0)

		ret = -errno;

	return ret;

}

arch/x86/um/os-Linux/tls.c

+33 −1
Original line number Diff line number Diff line 
#include <errno.h>

#include <linux/unistd.h>



#include <sys/ptrace.h>

#include <sys/syscall.h>

#include <unistd.h>



#include "sysdep/tls.h"



#ifndef PTRACE_GET_THREAD_AREA

#define PTRACE_GET_THREAD_AREA 25

#endif



#ifndef PTRACE_SET_THREAD_AREA

#define PTRACE_SET_THREAD_AREA 26

#endif



/* Checks whether host supports TLS, and sets *tls_min according to the value

 * valid on the host.

 * i386 host have it == 6; x86_64 host have it == 12, for i386 emulation. */

void check_host_supports_tls(int *supports_tls, int *tls_min) {

void check_host_supports_tls(int *supports_tls, int *tls_min)

{

	/* Values for x86 and x86_64.*/

	int val[] = {GDT_ENTRY_TLS_MIN_I386, GDT_ENTRY_TLS_MIN_X86_64};

	int i;
@@ -33,3 +43,25 @@ void check_host_supports_tls(int *supports_tls, int *tls_min) { 


	*supports_tls = 0;

}



int os_set_thread_area(user_desc_t *info, int pid)

{

	int ret;



	ret = ptrace(PTRACE_SET_THREAD_AREA, pid, info->entry_number,

		     (unsigned long) info);

	if (ret < 0)

		ret = -errno;

	return ret;

}



int os_get_thread_area(user_desc_t *info, int pid)

{

	int ret;



	ret = ptrace(PTRACE_GET_THREAD_AREA, pid, info->entry_number,

		     (unsigned long) info);

	if (ret < 0)

		ret = -errno;

	return ret;

}

arch/x86/um/shared/sysdep/tls.h

+3 −0
Original line number Diff line number Diff line
@@ -29,6 +29,9 @@ typedef struct user_desc user_desc_t; 


# endif /* __KERNEL__ */



extern int os_set_thread_area(user_desc_t *info, int pid);

extern int os_get_thread_area(user_desc_t *info, int pid);



#ifdef __i386__

#define GDT_ENTRY_TLS_MIN_I386 6

#define GDT_ENTRY_TLS_MIN_X86_64 12

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