um: take arch/um/sys-x86 to arch/x86/um

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

7 files changed, 1 insertions, 353 deletions

diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index 7879e76..015d000 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -5,7 +5,7 @@
 
 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/ sys-$(HEADER_ARCH)/ skas/
+	umid.o tls.o user_syms.o util.o drivers/ skas/
 
 obj-$(CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA) += elf_aux.o
 
diff --git a/arch/um/os-Linux/sys-x86/Makefile b/arch/um/os-Linux/sys-x86/Makefile
deleted file mode 100644
index 253bfb8..0000000
--- a/arch/um/os-Linux/sys-x86/Makefile
+++ /dev/null
@@ -1,13 +0,0 @@
-#
-# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
-# Licensed under the GPL
-#
-
-obj-y = registers.o task_size.o mcontext.o
-
-obj-$(CONFIG_X86_32) += tls.o
-obj-$(CONFIG_64BIT) += prctl.o
-
-USER_OBJS := $(obj-y)
-
-include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/sys-x86/mcontext.c b/arch/um/os-Linux/sys-x86/mcontext.c
deleted file mode 100644
index 1d33d72..0000000
--- a/arch/um/os-Linux/sys-x86/mcontext.c
+++ /dev/null
@@ -1,31 +0,0 @@
-#include <sys/ucontext.h>
-#define __FRAME_OFFSETS
-#include <asm/ptrace.h>
-#include <sysdep/ptrace.h>
-
-void get_regs_from_mc(struct uml_pt_regs *regs, mcontext_t *mc)
-{
-#ifdef __i386__
-#define COPY2(X,Y) regs->gp[X] = mc->gregs[REG_##Y]
-#define COPY(X) regs->gp[X] = mc->gregs[REG_##X]
-#define COPY_SEG(X) regs->gp[X] = mc->gregs[REG_##X] & 0xffff;
-#define COPY_SEG_CPL3(X) regs->gp[X] = (mc->gregs[REG_##X] & 0xffff) | 3;
-	COPY_SEG(GS); COPY_SEG(FS); COPY_SEG(ES); COPY_SEG(DS);
-	COPY(EDI); COPY(ESI); COPY(EBP);
-	COPY2(UESP, ESP); /* sic */
-	COPY(EBX); COPY(EDX); COPY(ECX); COPY(EAX);
-	COPY(EIP); COPY_SEG_CPL3(CS); COPY(EFL); COPY_SEG_CPL3(SS);
-#else
-#define COPY2(X,Y) regs->gp[X/sizeof(unsigned long)] = mc->gregs[REG_##Y]
-#define COPY(X) regs->gp[X/sizeof(unsigned long)] = mc->gregs[REG_##X]
-	COPY(R8); COPY(R9); COPY(R10); COPY(R11);
-	COPY(R12); COPY(R13); COPY(R14); COPY(R15);
-	COPY(RDI); COPY(RSI); COPY(RBP); COPY(RBX);
-	COPY(RDX); COPY(RAX); COPY(RCX); COPY(RSP);
-	COPY(RIP);
-	COPY2(EFLAGS, EFL);
-	COPY2(CS, CSGSFS);
-	regs->gp[CS / sizeof(unsigned long)] &= 0xffff;
-	regs->gp[CS / sizeof(unsigned long)] |= 3;
-#endif
-}
diff --git a/arch/um/os-Linux/sys-x86/prctl.c b/arch/um/os-Linux/sys-x86/prctl.c
deleted file mode 100644
index 9d34edd..0000000
--- a/arch/um/os-Linux/sys-x86/prctl.c
+++ /dev/null
@@ -1,12 +0,0 @@
-/*
- * Copyright (C) 2007 Jeff Dike (jdike@{addtoit.com,linux.intel.com})
- * Licensed under the GPL
- */
-
-#include <sys/ptrace.h>
-#include <linux/ptrace.h>
-
-int os_arch_prctl(int pid, int code, unsigned long *addr)
-{
-        return ptrace(PTRACE_ARCH_PRCTL, pid, (unsigned long) addr, code);
-}
diff --git a/arch/um/os-Linux/sys-x86/registers.c b/arch/um/os-Linux/sys-x86/registers.c
deleted file mode 100644
index 3a9b624..0000000
--- a/arch/um/os-Linux/sys-x86/registers.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*
- * Copyright (C) 2004 PathScale, Inc
- * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- * Licensed under the GPL
- */
-
-#include <errno.h>
-#include <sys/ptrace.h>
-#include <sys/user.h>
-#include "longjmp.h"
-#include "sysdep/ptrace_user.h"
-
-int save_fp_registers(int pid, unsigned long *fp_regs)
-{
-	if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0)
-		return -errno;
-	return 0;
-}
-
-int restore_fp_registers(int pid, unsigned long *fp_regs)
-{
-	if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0)
-		return -errno;
-	return 0;
-}
-
-#ifdef __i386__
-int have_fpx_regs = 1;
-int save_fpx_registers(int pid, unsigned long *fp_regs)
-{
-	if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0)
-		return -errno;
-	return 0;
-}
-
-int restore_fpx_registers(int pid, unsigned long *fp_regs)
-{
-	if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0)
-		return -errno;
-	return 0;
-}
-
-int get_fp_registers(int pid, unsigned long *regs)
-{
-	if (have_fpx_regs)
-		return save_fpx_registers(pid, regs);
-	else
-		return save_fp_registers(pid, regs);
-}
-
-int put_fp_registers(int pid, unsigned long *regs)
-{
-	if (have_fpx_regs)
-		return restore_fpx_registers(pid, regs);
-	else
-		return restore_fp_registers(pid, regs);
-}
-
-void arch_init_registers(int pid)
-{
-	struct user_fpxregs_struct fpx_regs;
-	int err;
-
-	err = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpx_regs);
-	if (!err)
-		return;
-
-	if (errno != EIO)
-		panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d",
-		      errno);
-
-	have_fpx_regs = 0;
-}
-#else
-
-int get_fp_registers(int pid, unsigned long *regs)
-{
-	return save_fp_registers(pid, regs);
-}
-
-int put_fp_registers(int pid, unsigned long *regs)
-{
-	return restore_fp_registers(pid, regs);
-}
-
-#endif
-
-unsigned long get_thread_reg(int reg, jmp_buf *buf)
-{
-	switch (reg) {
-#ifdef __i386__
-	case EIP:
-		return buf[0]->__eip;
-	case UESP:
-		return buf[0]->__esp;
-	case EBP:
-		return buf[0]->__ebp;
-#else
-	case RIP:
-		return buf[0]->__rip;
-	case RSP:
-		return buf[0]->__rsp;
-	case RBP:
-		return buf[0]->__rbp;
-#endif
-	default:
-		printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
-		       reg);
-		return 0;
-	}
-}
diff --git a/arch/um/os-Linux/sys-x86/task_size.c b/arch/um/os-Linux/sys-x86/task_size.c
deleted file mode 100644
index efb16c5..0000000
--- a/arch/um/os-Linux/sys-x86/task_size.c
+++ /dev/null
@@ -1,150 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <signal.h>
-#include <sys/mman.h>
-#include "longjmp.h"
-
-#ifdef __i386__
-
-static jmp_buf buf;
-
-static void segfault(int sig)
-{
-	longjmp(buf, 1);
-}
-
-static int page_ok(unsigned long page)
-{
-	unsigned long *address = (unsigned long *) (page << UM_KERN_PAGE_SHIFT);
-	unsigned long n = ~0UL;
-	void *mapped = NULL;
-	int ok = 0;
-
-	/*
-	 * First see if the page is readable.  If it is, it may still
-	 * be a VDSO, so we go on to see if it's writable.  If not
-	 * then try mapping memory there.  If that fails, then we're
-	 * still in the kernel area.  As a sanity check, we'll fail if
-	 * the mmap succeeds, but gives us an address different from
-	 * what we wanted.
-	 */
-	if (setjmp(buf) == 0)
-		n = *address;
-	else {
-		mapped = mmap(address, UM_KERN_PAGE_SIZE,
-			      PROT_READ | PROT_WRITE,
-			      MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		if (mapped == MAP_FAILED)
-			return 0;
-		if (mapped != address)
-			goto out;
-	}
-
-	/*
-	 * Now, is it writeable?  If so, then we're in user address
-	 * space.  If not, then try mprotecting it and try the write
-	 * again.
-	 */
-	if (setjmp(buf) == 0) {
-		*address = n;
-		ok = 1;
-		goto out;
-	} else if (mprotect(address, UM_KERN_PAGE_SIZE,
-			    PROT_READ | PROT_WRITE) != 0)
-		goto out;
-
-	if (setjmp(buf) == 0) {
-		*address = n;
-		ok = 1;
-	}
-
- out:
-	if (mapped != NULL)
-		munmap(mapped, UM_KERN_PAGE_SIZE);
-	return ok;
-}
-
-unsigned long os_get_top_address(void)
-{
-	struct sigaction sa, old;
-	unsigned long bottom = 0;
-	/*
-	 * A 32-bit UML on a 64-bit host gets confused about the VDSO at
-	 * 0xffffe000.  It is mapped, is readable, can be reprotected writeable
-	 * and written.  However, exec discovers later that it can't be
-	 * unmapped.  So, just set the highest address to be checked to just
-	 * below it.  This might waste some address space on 4G/4G 32-bit
-	 * hosts, but shouldn't hurt otherwise.
-	 */
-	unsigned long top = 0xffffd000 >> UM_KERN_PAGE_SHIFT;
-	unsigned long test, original;
-
-	printf("Locating the bottom of the address space ... ");
-	fflush(stdout);
-
-	/*
-	 * We're going to be longjmping out of the signal handler, so
-	 * SA_DEFER needs to be set.
-	 */
-	sa.sa_handler = segfault;
-	sigemptyset(&sa.sa_mask);
-	sa.sa_flags = SA_NODEFER;
-	if (sigaction(SIGSEGV, &sa, &old)) {
-		perror("os_get_top_address");
-		exit(1);
-	}
-
-	/* Manually scan the address space, bottom-up, until we find
-	 * the first valid page (or run out of them).
-	 */
-	for (bottom = 0; bottom < top; bottom++) {
-		if (page_ok(bottom))
-			break;
-	}
-
-	/* If we've got this far, we ran out of pages. */
-	if (bottom == top) {
-		fprintf(stderr, "Unable to determine bottom of address "
-			"space.\n");
-		exit(1);
-	}
-
-	printf("0x%x\n", bottom << UM_KERN_PAGE_SHIFT);
-	printf("Locating the top of the address space ... ");
-	fflush(stdout);
-
-	original = bottom;
-
-	/* This could happen with a 4G/4G split */
-	if (page_ok(top))
-		goto out;
-
-	do {
-		test = bottom + (top - bottom) / 2;
-		if (page_ok(test))
-			bottom = test;
-		else
-			top = test;
-	} while (top - bottom > 1);
-
-out:
-	/* Restore the old SIGSEGV handling */
-	if (sigaction(SIGSEGV, &old, NULL)) {
-		perror("os_get_top_address");
-		exit(1);
-	}
-	top <<= UM_KERN_PAGE_SHIFT;
-	printf("0x%x\n", top);
-
-	return top;
-}
-
-#else
-
-unsigned long os_get_top_address(void)
-{
-	/* The old value of CONFIG_TOP_ADDR */
-	return 0x7fc0000000;
-}
-
-#endif
diff --git a/arch/um/os-Linux/sys-x86/tls.c b/arch/um/os-Linux/sys-x86/tls.c
deleted file mode 100644
index 281e83e..0000000
--- a/arch/um/os-Linux/sys-x86/tls.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#include <errno.h>
-#include <linux/unistd.h>
-
-#include <sys/syscall.h>
-#include <unistd.h>
-
-#include "sysdep/tls.h"
-
-/* 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) {
-	/* Values for x86 and x86_64.*/
-	int val[] = {GDT_ENTRY_TLS_MIN_I386, GDT_ENTRY_TLS_MIN_X86_64};
-	int i;
-
-	for (i = 0; i < ARRAY_SIZE(val); i++) {
-		user_desc_t info;
-		info.entry_number = val[i];
-
-		if (syscall(__NR_get_thread_area, &info) == 0) {
-			*tls_min = val[i];
-			*supports_tls = 1;
-			return;
-		} else {
-			if (errno == EINVAL)
-				continue;
-			else if (errno == ENOSYS)
-				*supports_tls = 0;
-				return;
-		}
-	}
-
-	*supports_tls = 0;
-}