Added missing tegra files.HEADmaster

12 files changed, 451 insertions, 0 deletions

diff --git a/arch/um/os-Linux/sys-i386/Makefile b/arch/um/os-Linux/sys-i386/Makefile
new file mode 100644
index 00000000000..b4bc6ac4f30
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/Makefile
@@ -0,0 +1,10 @@
+#
+# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+# Licensed under the GPL
+#
+
+obj-y = registers.o signal.o task_size.o tls.o
+
+USER_OBJS := $(obj-y)
+
+include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c
new file mode 100644
index 00000000000..229f7a53d8d
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/registers.c
@@ -0,0 +1,91 @@
+/*
+ * 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 "kern_constants.h"
+#include "longjmp.h"
+#include "user.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;
+}
+
+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;
+}
+
+unsigned long get_thread_reg(int reg, jmp_buf *buf)
+{
+        switch (reg) {
+        case EIP:
+                return buf[0]->__eip;
+        case UESP:
+                return buf[0]->__esp;
+        case EBP:
+                return buf[0]->__ebp;
+        default:
+                printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
+                       reg);
+                return 0;
+        }
+}
+
+int have_fpx_regs = 1;
+
+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;
+}
diff --git a/arch/um/os-Linux/sys-i386/signal.c b/arch/um/os-Linux/sys-i386/signal.c
new file mode 100644
index 00000000000..f311609f93d
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/signal.c
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2006 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <signal.h>
+
+extern void handle_signal(int sig, struct sigcontext *sc);
+
+void hard_handler(int sig)
+{
+        handle_signal(sig, (struct sigcontext *) (&sig + 1));
+}
diff --git a/arch/um/os-Linux/sys-i386/task_size.c b/arch/um/os-Linux/sys-i386/task_size.c
new file mode 100644
index 00000000000..be04c1e183b
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/task_size.c
@@ -0,0 +1,139 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <sys/mman.h>
+#include "longjmp.h"
+#include "kern_constants.h"
+
+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;
+}
diff --git a/arch/um/os-Linux/sys-i386/tls.c b/arch/um/os-Linux/sys-i386/tls.c
new file mode 100644
index 00000000000..32ed41ec1a3
--- /dev/null
+++ b/arch/um/os-Linux/sys-i386/tls.c
@@ -0,0 +1,36 @@
+#include <errno.h>
+#include <linux/unistd.h>
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#include "sysdep/tls.h"
+#include "user.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;
+}
diff --git a/arch/um/os-Linux/sys-x86_64/Makefile b/arch/um/os-Linux/sys-x86_64/Makefile
new file mode 100644
index 00000000000..a44a47f8f57
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/Makefile
@@ -0,0 +1,10 @@
+#
+# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+# Licensed under the GPL
+#
+
+obj-y = registers.o prctl.o signal.o task_size.o
+
+USER_OBJS := $(obj-y)
+
+include arch/um/scripts/Makefile.rules
diff --git a/arch/um/os-Linux/sys-x86_64/prctl.c b/arch/um/os-Linux/sys-x86_64/prctl.c
new file mode 100644
index 00000000000..9d34eddb517
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/prctl.c
@@ -0,0 +1,12 @@
+/*
+ * 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_64/registers.c b/arch/um/os-Linux/sys-x86_64/registers.c
new file mode 100644
index 00000000000..594d97ad02b
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/registers.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2006 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <errno.h>
+#include <sys/ptrace.h>
+#define __FRAME_OFFSETS
+#include <asm/ptrace.h>
+#include "kern_constants.h"
+#include "longjmp.h"
+#include "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;
+}
+
+unsigned long get_thread_reg(int reg, jmp_buf *buf)
+{
+        switch (reg) {
+        case RIP:
+                return buf[0]->__rip;
+        case RSP:
+                return buf[0]->__rsp;
+        case RBP:
+                return buf[0]->__rbp;
+        default:
+                printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n",
+                       reg);
+                return 0;
+        }
+}
+
+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);
+}
diff --git a/arch/um/os-Linux/sys-x86_64/signal.c b/arch/um/os-Linux/sys-x86_64/signal.c
new file mode 100644
index 00000000000..82a388822cd
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/signal.c
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2006 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <signal.h>
+
+extern void handle_signal(int sig, struct sigcontext *sc);
+
+void hard_handler(int sig)
+{
+        struct ucontext *uc;
+        asm("movq %%rdx, %0" : "=r" (uc));
+
+        handle_signal(sig, (struct sigcontext *) &uc->uc_mcontext);
+}
diff --git a/arch/um/os-Linux/sys-x86_64/task_size.c b/arch/um/os-Linux/sys-x86_64/task_size.c
new file mode 100644
index 00000000000..26a0dd1f349
--- /dev/null
+++ b/arch/um/os-Linux/sys-x86_64/task_size.c
@@ -0,0 +1,5 @@
+unsigned long os_get_top_address(unsigned long shift)
+{
+        /* The old value of CONFIG_TOP_ADDR */
+        return 0x7fc0000000;
+}
diff --git a/arch/um/os-Linux/tls.c b/arch/um/os-Linux/tls.c
new file mode 100644
index 00000000000..73277801ef1
--- /dev/null
+++ b/arch/um/os-Linux/tls.c
@@ -0,0 +1,35 @@
+#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;
+}
diff --git a/arch/um/os-Linux/uaccess.c b/arch/um/os-Linux/uaccess.c
new file mode 100644
index 00000000000..087ed74ffca
--- /dev/null
+++ b/arch/um/os-Linux/uaccess.c
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <stddef.h>
+#include "longjmp.h"
+
+unsigned long __do_user_copy(void *to, const void *from, int n,
+                             void **fault_addr, jmp_buf **fault_catcher,
+                             void (*op)(void *to, const void *from,
+                                        int n), int *faulted_out)
+{
+        unsigned long *faddrp = (unsigned long *) fault_addr, ret;
+
+        jmp_buf jbuf;
+        *fault_catcher = &jbuf;
+        if (UML_SETJMP(&jbuf) == 0) {
+                (*op)(to, from, n);
+                ret = 0;
+                *faulted_out = 0;
+        }
+        else {
+                ret = *faddrp;
+                *faulted_out = 1;
+        }
+        *fault_addr = NULL;
+        *fault_catcher = NULL;
+        return ret;
+}
+