bsd-user: pull in target_arch_thread.h update target_arch_elf.h

Update target_arch_elf.h to remove thread_init. Move its contents to
target_arch_thread.h and rename to target_thread_init(). Update
elfload.c to call it. Create thread_os_thread.h to hold the os specific
parts of the thread and threat manipulation routines. Currently, it just
includes target_arch_thread.h. target_arch_thread.h contains the at the
moment unused target_thread_set_upcall which will be used in the future
when creating actual thread (i386 has this stubbed, but other
architectures in the bsd-user tree have real ones). FreeBSD doesn't do
AT_HWCAP, so remove that code. Linux does, and this code came from there.

These changes are all interrelated and could be brokend down, but seem
to represent a reviewable changeset since most of the change is boiler
plate.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>

2 files changed, 50 insertions, 49 deletions

diff --git a/bsd-user/i386/target_arch_elf.h b/bsd-user/i386/target_arch_elf.h
index 84f61bd..eb760e0 100644
--- a/bsd-user/i386/target_arch_elf.h
+++ b/bsd-user/i386/target_arch_elf.h
@@ -19,62 +19,16 @@
 #ifndef _TARGET_ARCH_ELF_H_
 #define _TARGET_ARCH_ELF_H_
 
-#define ELF_PLATFORM get_elf_platform()
-
-static const char *get_elf_platform(void)
-{
-    static char elf_platform[] = "i386";
-    int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL);
-    if (family > 6) {
-        family = 6;
-    }
-    if (family >= 3) {
-        elf_platform[1] = '0' + family;
-    }
-    return elf_platform;
-}
-
-#define ELF_HWCAP get_elf_hwcap()
-
-static uint32_t get_elf_hwcap(void)
-{
-    X86CPU *cpu = X86_CPU(thread_cpu);
-
-    return cpu->env.features[FEAT_1_EDX];
-}
-
 #define ELF_START_MMAP 0x80000000
-
-/*
- * This is used to ensure we don't load something for the wrong architecture.
- */
+#define ELF_ET_DYN_LOAD_ADDR    0x01001000
 #define elf_check_arch(x) (((x) == EM_386) || ((x) == EM_486))
 
-/*
- * These are used to set parameters in the core dumps.
- */
+#define ELF_HWCAP       0 /* FreeBSD doesn't do AT_HWCAP{,2} on x86 */
+
 #define ELF_CLASS       ELFCLASS32
 #define ELF_DATA        ELFDATA2LSB
 #define ELF_ARCH        EM_386
 
-static inline void init_thread(struct target_pt_regs *regs,
-                               struct image_info *infop)
-{
-    regs->esp = infop->start_stack;
-    regs->eip = infop->entry;
-
-    /*
-     * SVR4/i386 ABI (pages 3-31, 3-32) says that when the program
-     * starts %edx contains a pointer to a function which might be
-     * registered using `atexit'.  This provides a mean for the
-     * dynamic linker to call DT_FINI functions for shared libraries
-     * that have been loaded before the code runs.
-     *
-     * A value of 0 tells we have no such handler.
-     */
-    regs->edx = 0;
-}
-
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE       4096
 
diff --git a/bsd-user/i386/target_arch_thread.h b/bsd-user/i386/target_arch_thread.h
new file mode 100644
index 0000000..e65e476
--- /dev/null
+++ b/bsd-user/i386/target_arch_thread.h
@@ -0,0 +1,47 @@
+/*
+ *  i386 thread support
+ *
+ *  Copyright (c) 2013 Stacey D. Son
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _TARGET_ARCH_THREAD_H_
+#define _TARGET_ARCH_THREAD_H_
+
+/* Compare to vm_machdep.c cpu_set_upcall_kse() */
+static inline void target_thread_set_upcall(CPUX86State *regs, abi_ulong entry,
+    abi_ulong arg, abi_ulong stack_base, abi_ulong stack_size)
+{
+    /* XXX */
+}
+
+static inline void target_thread_init(struct target_pt_regs *regs,
+        struct image_info *infop)
+{
+    regs->esp = infop->start_stack;
+    regs->eip = infop->entry;
+
+    /*
+     * SVR4/i386 ABI (pages 3-31, 3-32) says that when the program starts %edx
+     * contains a pointer to a function which might be registered using
+     * `atexit'.  This provides a mean for the dynamic linker to call DT_FINI
+     * functions for shared libraries that have been loaded before the code
+     * runs.
+     *
+     * A value of 0 tells we have no such handler.
+     */
+    regs->edx = 0;
+}
+
+#endif /* !_TARGET_ARCH_THREAD_H_ */