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authorAl Viro <viro@ftp.linux.org.uk>2011-08-18 20:06:39 +0100
committerRichard Weinberger <richard@nod.at>2011-11-02 14:15:05 +0100
commit5c48b108ecbf6505d929e64d50dace13ac2bdf34 (patch)
tree016904f84fbe05aa301c5cdfe712d90f6bb828fe /arch/um/os-Linux
parent7bbe7204e93734fe79d8aac3e08a7cb4624b5004 (diff)
downloadop-kernel-dev-5c48b108ecbf6505d929e64d50dace13ac2bdf34.zip
op-kernel-dev-5c48b108ecbf6505d929e64d50dace13ac2bdf34.tar.gz
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>
Diffstat (limited to 'arch/um/os-Linux')
-rw-r--r--arch/um/os-Linux/Makefile2
-rw-r--r--arch/um/os-Linux/sys-x86/Makefile13
-rw-r--r--arch/um/os-Linux/sys-x86/mcontext.c31
-rw-r--r--arch/um/os-Linux/sys-x86/prctl.c12
-rw-r--r--arch/um/os-Linux/sys-x86/registers.c111
-rw-r--r--arch/um/os-Linux/sys-x86/task_size.c150
-rw-r--r--arch/um/os-Linux/sys-x86/tls.c35
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;
-}
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