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x86: bring up share object module on i386 machine 

1. upddate kernel module to support i386
2. update libdl to support open *.so by absolute path
3. new test case bsp/x86/src/hello.c to test i386 module feature

Signed-off-by: parai <parai@foxmail.com>
This commit is contained in:
parai 2017-08-20 20:24:07 +08:00
parent 0cd49a20ad
commit 2957cf6f52
12 changed files with 167 additions and 18 deletions
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44
bsp/x86/Makefile
View File

@ -1,17 +1,45 @@
all:floppy.img
scons
mkdir -p tmp
sudo mount -t vfat floppy.img tmp -o loop
sudo cp rtthread.elf tmp/boot/oskernel
sudo umount tmp
CC = gcc -O0 -m32 -fno-builtin -fno-stack-protector -nostdinc -nostdlib
LD = ld -melf_i386 -nostdlib
all: rtthread rtsym exe dll floppy.img
@mkdir -p tmp
@sudo mount -t vfat floppy.img tmp -o loop
@sudo cp -fv rtthread.elf tmp/boot/oskernel
@sudo rm tmp/bin/* -fr
@sudo cp out/* tmp/bin/ -fv
@sudo umount tmp
rtthread:
@scons
rtsym:
@./src/extract.sh ./rtthread-ia32.map ./src/rt_thread_sym.h
obj:
mkdir -p obj
out:
mkdir -p out
dll: obj out
$(CC) -shared -s -fPIC -e main -Isrc src/hello.c -o out/hello.mo
disasm: obj out
$(CC) -shared -S -fPIC -Isrc src/hello.c -o obj/hello.s
cat obj/hello.s
objdump --disassemble out/hello.mo
exe: obj out
clean:
scons -c clean
rm -fr build rtthread*
rm -fr build rtthread* out obj
floppy.img:
wget https://github.com/bajdcc/tinix/raw/master/floppy.img
# https://en.wikibooks.org/wiki/QEMU/Devices/Network
run:
qemu-system-i386 -fda floppy.img -boot a -m 64M -serial stdio
qemu-system-i386 -fda floppy.img -boot a -m 64M -serial stdio -net nic,model=ne2k_pci

9
bsp/x86/applications/application.c
View File

@ -26,7 +26,12 @@
#ifdef RT_USING_DFS
#include <dfs_fs.h>
#include <dfs_init.h>
#include "floppy.h"
#ifdef RT_USING_MODULE
#include <rtm.h>
#endif
extern int elm_init(void);
#endif
/* components initialization for simulator */
@ -41,6 +46,10 @@ void components_init(void)
/* initialize the elm chan FatFS file system*/
elm_init();
#endif
#ifdef RT_USING_MODULE
rt_system_module_init();
#endif
#endif
}
void rt_init_thread_entry(void *parameter)

4
bsp/x86/drivers/console.c
View File

@ -29,7 +29,7 @@ extern void rt_serial_init(void);
extern char rt_serial_getc(void);
extern void rt_serial_putc(const char c);
static void rt_console_putc(int c);
void rt_console_putc(int c);
/**
* @addtogroup QEMU
@ -127,7 +127,7 @@ static void rt_cga_putc(int c)
*
* @param c the char to write
*/
static void rt_console_putc(int c)
void rt_console_putc(int c)
{
rt_cga_putc(c);
rt_serial_putc(c);

7
bsp/x86/rtconfig.h
View File

@ -17,7 +17,7 @@
/* SECTION: RT_DEBUG */
/* Thread Debug */
#define RT_DEBUG
#define RT_THREAD_DEBUG
#define RT_DEBUG_MODULE 0
#define RT_USING_OVERFLOW_CHECK
@ -69,6 +69,8 @@
/* SECTION: finsh, a C-Express shell */
#define RT_USING_FINSH
#define FINSH_USING_MSH
#define FINSH_USING_MSH_ONLY
/* Using symbol table */
#define FINSH_USING_SYMTAB
#define FINSH_USING_DESCRIPTION
@ -175,4 +177,7 @@
/* #define RTGUI_IMAGE_XPM */
/* #define RTGUI_IMAGE_BMP */
#define RT_USING_LIBDL
#define RT_USING_MODULE
#define MODULE_USING_386
#endif

2
bsp/x86/rtconfig.py
View File

@ -33,7 +33,7 @@ BUILD = 'debug'
if PLATFORM == 'gcc':
# toolchains
PREFIX = ''
CC = PREFIX + 'gcc -m32 -fno-builtin -fno-stack-protector'
CC = PREFIX + 'gcc -m32 -fno-builtin -fno-stack-protector -nostdinc'
AS = PREFIX + 'gcc -m32'
AR = PREFIX + 'ar'
LINK = PREFIX + 'ld -melf_i386'

28
bsp/x86/src/extract.sh Executable file
View File

@ -0,0 +1,28 @@
#! /bin/sh
imap=$1
iout=$2
echo "!!! extract symbol from $imap to $iout !!!"
symlist="rt_kprintf \
rt_kputs \
rt_vsprintf \
rt_sprintf \
rt_snprintf \
rt_thread_create \
"
echo "#ifndef RT_THREAD_SYM_H_H" > $iout
echo "#define RT_THREAD_SYM_H_H" >> $iout
for sym in $symlist
do
dlim=`echo $sym | cut -b 1`
addr=`cat $imap | grep $sym | head -n 1 | cut -d $dlim -f 1`
echo "#define __abs_$sym $addr" >> $iout
done
echo "#endif /* RT_THREAD_SYM_H_H */" >> $iout

36
bsp/x86/src/hello.c Normal file
View File

@ -0,0 +1,36 @@
#include <stdio.h>
const char* g_str = "Hello World!";
static int a = 1234;
int b = 5678;
extern void rt_kprintf(const char* fmt,...);
int add(int a, int b)
{
return a+b;
}
int main(int argc, char* argv[])
{
int i;
char str[32] = "Hello World\n";
for(i=0; i<argc; i++)
{
printf("argv[%d]='%s'\n", i, argv[i]);
}
printf(str);
printf("g_str address is %ph\n",g_str);
puts(g_str);
rt_kprintf("\nnative rt_kprintf a(%ph)=%d, b(%ph)=%d\n", &a, a, &b, b);
printf("%d+%d=%d\n", 4, 5, add(4, 5));
return 0xdeadbeef;
}

18
bsp/x86/src/stdio.h Normal file
View File

@ -0,0 +1,18 @@
#ifndef __STDIO_H_H
#define __STDIO_H_H
#include <rt_thread_sym.h>
typedef unsigned int size_t;
typedef int (*sprintf_fcn_t)(char *buf ,const char *format, ...);
typedef int (*snprintf_fcn_t)(char *buf, size_t size, const char *format, ...);
typedef void (*puts_fcn_t)(const char *str);
typedef void (*printf_fcn_t)(const char *fmt, ...);
#define printf ((printf_fcn_t)__abs_rt_kprintf)
#define puts ((printf_fcn_t)__abs_rt_kputs)
#define sprintf ((printf_fcn_t)__abs_rt_sprintf)
#define snprintf ((printf_fcn_t)__abs_rt_snprintf)
#endif

5
bsp/x86/x86_ram.lds
View File

@ -21,10 +21,13 @@ SECTIONS
KEEP(*(VSymTab))
__vsymtab_end = .;
. = ALIGN(4);
__rtmsymtab_start = .;
KEEP(*(RTMSymTab));
__rtmsymtab_end = .;
}
. = ALIGN(4);
.rodata : { *(.rodata) }
.rodata : { *(.rodata*) }
. = ALIGN(4);
.data : { *(.data) }

9
components/libc/libdl/dlopen.c
View File

@ -27,7 +27,7 @@ void* dlopen(const char *filename, int flags)
/* check parameters */
RT_ASSERT(filename != RT_NULL);
if (filename[0] != '/') /* it's a absolute path, use it directly */
if (filename[0] != '/') /* it's a relative path, prefix with MODULE_ROOT_DIR */
{
fullpath = rt_malloc(strlen(def_path) + strlen(filename) + 2);
@ -37,8 +37,7 @@ void* dlopen(const char *filename, int flags)
}
else
{
rt_kprintf("use absolute path\n");
return RT_NULL;
fullpath = (char*)filename; /* absolute path, use it directly */
}
/* find in module list */
@ -47,7 +46,11 @@ void* dlopen(const char *filename, int flags)
if(module != RT_NULL) module->nref++;
else module = rt_module_open(fullpath);
if(fullpath != filename)
{
rt_free(fullpath);
}
return (void*)module;
}

14
src/module.c
View File

@ -27,6 +27,7 @@
* 2012-11-23 Bernard using RT_DEBUG_LOG instead of rt_kprintf.
* 2012-11-28 Bernard remove rt_current_module and user
* can use rt_module_unload to remove a module.
* 2017-08-20 parai support intel 386 machine
*/
#include <rthw.h>
@ -223,6 +224,10 @@ static int rt_module_arm_relocate(struct rt_module *module,
*where &= 0xf000000f;
*where |= 0x01a0f000;
break;
#ifdef MODULE_USING_386
case R_386_GLOB_DAT:
case R_386_JUMP_SLOT:
#endif
case R_ARM_GLOB_DAT:
case R_ARM_JUMP_SLOT:
*where = (Elf32_Addr)sym_val;
@ -236,6 +241,9 @@ static int rt_module_arm_relocate(struct rt_module *module,
RT_DEBUG_LOG(RT_DEBUG_MODULE, ("R_ARM_GOT_BREL: 0x%x -> 0x%x 0x%x\n",
where, *where, sym_val));
break;
#endif
#ifdef MODULE_USING_386
case R_386_RELATIVE:
#endif
case R_ARM_RELATIVE:
*where = (Elf32_Addr)sym_val + *where;
@ -543,7 +551,11 @@ static struct rt_module *_load_shared_object(const char *name,
sym->st_shndx));
if ((sym->st_shndx != SHT_NULL) ||
(ELF_ST_BIND(sym->st_info) == STB_LOCAL))
(ELF_ST_BIND(sym->st_info) == STB_LOCAL)
#ifdef MODULE_USING_386
|| ( (ELF_ST_BIND(sym->st_info) == STB_GLOBAL) && (ELF_ST_TYPE(sym->st_info) == STT_OBJECT) )
#endif
)
{
rt_module_arm_relocate(module, rel,
(Elf32_Addr)(module->module_space

7
src/module.h
View File

@ -208,6 +208,13 @@ typedef struct
#define R_ARM_THM_JUMP24 30
#define R_ARM_V4BX 40
/*
* Relocation type for arm
*/
#define R_386_GLOB_DAT 6
#define R_386_JUMP_SLOT 7
#define R_386_RELATIVE 8
/* Program Header */
typedef struct
{