Add support for the NEC v850e processor.
This commit is contained in:
Miles Bader
parent
c57e42b8f0
commit
ae28b04ff2
@ -3,12 +3,14 @@
|
||||
* Mini insmod implementation for busybox
|
||||
*
|
||||
* This version of insmod supports x86, ARM, SH3/4, powerpc, m68k,
|
||||
* and MIPS.
|
||||
* MIPS, and v850e.
|
||||
*
|
||||
* Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
|
||||
* Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
|
||||
* Copyright (C) 1999,2000,2001,2002 by Erik Andersen <andersee@debian.org>
|
||||
* and Ron Alder <alder@lineo.com>
|
||||
*
|
||||
* Modified by Miles Bader <miles@gnu.org> to support the NEC V850E.
|
||||
*
|
||||
* Modified by Bryan Rittmeyer <bryan@ixiacom.com> to support SH4
|
||||
* and (theoretically) SH3. I have only tested SH4 in little endian mode.
|
||||
*
|
||||
@ -104,6 +106,11 @@
|
||||
// neither used
|
||||
#endif
|
||||
|
||||
#if defined (__v850e__)
|
||||
#define CONFIG_USE_PLT_ENTRIES
|
||||
#define CONFIG_PLT_ENTRY_SIZE 8
|
||||
#endif
|
||||
|
||||
//----------------------------------------------------------------------------
|
||||
//--------modutils module.h, lines 45-242
|
||||
//----------------------------------------------------------------------------
|
||||
@ -133,7 +140,7 @@
|
||||
#ifndef MODUTILS_MODULE_H
|
||||
static const int MODUTILS_MODULE_H = 1;
|
||||
|
||||
#ident "$Id: insmod.c,v 1.78 2001/12/29 04:15:13 andersen Exp $"
|
||||
#ident "$Id: insmod.c,v 1.79 2002/04/01 09:34:25 miles Exp $"
|
||||
|
||||
/* This file contains the structures used by the 2.0 and 2.1 kernels.
|
||||
We do not use the kernel headers directly because we do not wish
|
||||
@ -350,7 +357,7 @@ int delete_module(const char *);
|
||||
#ifndef MODUTILS_OBJ_H
|
||||
static const int MODUTILS_OBJ_H = 1;
|
||||
|
||||
#ident "$Id: insmod.c,v 1.78 2001/12/29 04:15:13 andersen Exp $"
|
||||
#ident "$Id: insmod.c,v 1.79 2002/04/01 09:34:25 miles Exp $"
|
||||
|
||||
/* The relocatable object is manipulated using elfin types. */
|
||||
|
||||
@ -449,6 +456,19 @@ static const int MODUTILS_OBJ_H = 1;
|
||||
#define SHT_RELM SHT_RELA
|
||||
#define Elf32_RelM Elf32_Rela
|
||||
|
||||
#elif defined (__v850e__)
|
||||
|
||||
#ifndef EM_CYGNUS_V850 /* grumble */
|
||||
#define EM_CYGNUS_V850 0x9080
|
||||
#endif
|
||||
|
||||
#define MATCH_MACHINE(x) ((x) == EM_V850 || (x) == EM_CYGNUS_V850)
|
||||
#define SHT_RELM SHT_RELA
|
||||
#define Elf32_RelM Elf32_Rela
|
||||
#define ELFDATAM ELFDATA2LSB
|
||||
|
||||
#define SYMBOL_PREFIX "_"
|
||||
|
||||
#else
|
||||
#error Sorry, but insmod.c does not yet support this architecture...
|
||||
#endif
|
||||
@ -626,6 +646,12 @@ static int arch_init_module (struct obj_file *f, struct new_module *);
|
||||
|
||||
|
||||
|
||||
/* SPFX is always a string, so it can be concatenated to string constants. */
|
||||
#ifdef SYMBOL_PREFIX
|
||||
#define SPFX SYMBOL_PREFIX
|
||||
#else
|
||||
#define SPFX ""
|
||||
#endif
|
||||
|
||||
|
||||
#define _PATH_MODULES "/lib/modules"
|
||||
@ -828,9 +854,22 @@ arch_apply_relocation(struct obj_file *f,
|
||||
case R_PPC_NONE:
|
||||
#elif defined(__mips__)
|
||||
case R_MIPS_NONE:
|
||||
#elif defined (__v850e__)
|
||||
case R_V850_NONE:
|
||||
#endif
|
||||
break;
|
||||
|
||||
#if defined (__v850e__)
|
||||
case R_V850_32:
|
||||
/* We write two shorts instead of a long because even
|
||||
32-bit insns only need half-word alignment, but
|
||||
32-bit data needs to be long-word aligned. */
|
||||
v += ((unsigned short *)loc)[0];
|
||||
v += ((unsigned short *)loc)[1] << 16;
|
||||
((unsigned short *)loc)[0] = v & 0xffff;
|
||||
((unsigned short *)loc)[1] = (v >> 16) & 0xffff;
|
||||
break;
|
||||
#else /* !__v850e__ */
|
||||
#if defined(__sh__)
|
||||
case R_SH_DIR32:
|
||||
#elif defined(__arm__)
|
||||
@ -846,6 +885,8 @@ arch_apply_relocation(struct obj_file *f,
|
||||
#endif
|
||||
*loc += v;
|
||||
break;
|
||||
#endif /* __v850e__ */
|
||||
|
||||
#if defined(__mc68000__)
|
||||
case R_68K_8:
|
||||
if (v > 0xff)
|
||||
@ -1000,6 +1041,9 @@ arch_apply_relocation(struct obj_file *f,
|
||||
#endif
|
||||
#if defined(__powerpc__)
|
||||
case R_PPC_REL24:
|
||||
#endif
|
||||
#if defined (__v850e__)
|
||||
case R_V850_22_PCREL:
|
||||
#endif
|
||||
/* find the plt entry and initialize it if necessary */
|
||||
assert(isym != NULL);
|
||||
@ -1020,6 +1064,13 @@ arch_apply_relocation(struct obj_file *f,
|
||||
ip[1] = 0x396b0000 + (v & 0xffff); /* addi r11,r11,sym@l */
|
||||
ip[2] = 0x7d6903a6; /* mtctr r11 */
|
||||
ip[3] = 0x4e800420; /* bctr */
|
||||
#endif
|
||||
#if defined (__v850e__)
|
||||
/* We have to trash a register, so we assume that any control
|
||||
transfer more than 21-bits away must be a function call
|
||||
(so we can use a call-clobbered register). */
|
||||
ip[0] = 0x0621 + ((v & 0xffff) << 16); /* mov sym, r1 ... */
|
||||
ip[1] = ((v >> 16) & 0xffff) + 0x610000; /* ...; jmp r1 */
|
||||
#endif
|
||||
pe->inited = 1;
|
||||
}
|
||||
@ -1027,12 +1078,20 @@ arch_apply_relocation(struct obj_file *f,
|
||||
/* relative distance to target */
|
||||
v -= dot;
|
||||
/* if the target is too far away.... */
|
||||
if ((int)v < -0x02000000 || (int)v >= 0x02000000) {
|
||||
/* go via the plt */
|
||||
v = plt + pe->offset - dot;
|
||||
}
|
||||
#if defined (__arm__) || defined (__powerpc__)
|
||||
if ((int)v < -0x02000000 || (int)v >= 0x02000000)
|
||||
#elif defined (__v850e__)
|
||||
if ((Elf32_Sword)v > 0x1fffff || (Elf32_Sword)v < (Elf32_Sword)-0x200000)
|
||||
#endif
|
||||
/* go via the plt */
|
||||
v = plt + pe->offset - dot;
|
||||
|
||||
#if defined (__v850e__)
|
||||
if (v & 1)
|
||||
#else
|
||||
if (v & 3)
|
||||
ret = obj_reloc_dangerous;
|
||||
#endif
|
||||
ret = obj_reloc_dangerous;
|
||||
|
||||
/* merge the offset into the instruction. */
|
||||
#if defined(__arm__)
|
||||
@ -1044,6 +1103,17 @@ arch_apply_relocation(struct obj_file *f,
|
||||
#if defined(__powerpc__)
|
||||
*loc = (*loc & ~0x03fffffc) | (v & 0x03fffffc);
|
||||
#endif
|
||||
#if defined (__v850e__)
|
||||
/* We write two shorts instead of a long because even 32-bit insns
|
||||
only need half-word alignment, but the 32-bit data write needs
|
||||
to be long-word aligned. */
|
||||
((unsigned short *)loc)[0] =
|
||||
(*(unsigned short *)loc & 0xffc0) /* opcode + reg */
|
||||
| ((v >> 16) & 0x3f); /* offs high part */
|
||||
((unsigned short *)loc)[1] =
|
||||
(v & 0xffff); /* offs low part */
|
||||
#endif
|
||||
|
||||
break;
|
||||
#endif /* CONFIG_USE_PLT_ENTRIES */
|
||||
|
||||
@ -1203,6 +1273,12 @@ static int arch_create_got(struct obj_file *f)
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined (__v850e__)
|
||||
case R_V850_22_PCREL:
|
||||
pltneeded = 1;
|
||||
break;
|
||||
#endif
|
||||
|
||||
#if defined(__arm__)
|
||||
case R_ARM_PC24:
|
||||
case R_ARM_PLT32:
|
||||
@ -1250,8 +1326,8 @@ static int arch_create_got(struct obj_file *f)
|
||||
pltneeded = 0;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#if defined(CONFIG_USE_GOT_ENTRIES)
|
||||
if (got_offset) {
|
||||
@ -1610,19 +1686,45 @@ add_symbols_from(
|
||||
struct new_module_symbol *s;
|
||||
size_t i;
|
||||
int used = 0;
|
||||
#ifdef SYMBOL_PREFIX
|
||||
char *name_buf = 0;
|
||||
size_t name_alloced_size = 0;
|
||||
#endif
|
||||
|
||||
for (i = 0, s = syms; i < nsyms; ++i, ++s) {
|
||||
|
||||
/* Only add symbols that are already marked external. If we
|
||||
override locals we may cause problems for argument initialization.
|
||||
We will also create a false dependency on the module. */
|
||||
/* Only add symbols that are already marked external.
|
||||
If we override locals we may cause problems for
|
||||
argument initialization. We will also create a false
|
||||
dependency on the module. */
|
||||
struct obj_symbol *sym;
|
||||
char *name = (char *)s->name;
|
||||
|
||||
sym = obj_find_symbol(f, (char *) s->name);
|
||||
if (sym && !ELFW(ST_BIND) (sym->info) == STB_LOCAL) {
|
||||
sym = obj_add_symbol(f, (char *) s->name, -1,
|
||||
ELFW(ST_INFO) (STB_GLOBAL, STT_NOTYPE),
|
||||
idx, s->value, 0);
|
||||
#ifdef SYMBOL_PREFIX
|
||||
/* Prepend SYMBOL_PREFIX to the symbol's name (the
|
||||
kernel exports `C names', but module object files
|
||||
reference `linker names'). */
|
||||
size_t extra = sizeof SYMBOL_PREFIX;
|
||||
size_t name_size = strlen (name) + extra;
|
||||
if (name_size > name_alloced_size) {
|
||||
name_alloced_size = name_size * 2;
|
||||
name_buf = alloca (name_alloced_size);
|
||||
}
|
||||
strcpy (name_buf, SYMBOL_PREFIX);
|
||||
strcpy (name_buf + extra - 1, name);
|
||||
name = name_buf;
|
||||
#endif /* SYMBOL_PREFIX */
|
||||
|
||||
sym = obj_find_symbol(f, name);
|
||||
if (sym && !(ELFW(ST_BIND) (sym->info) == STB_LOCAL)) {
|
||||
#ifdef SYMBOL_PREFIX
|
||||
/* Put NAME_BUF into more permanent storage. */
|
||||
name = xmalloc (name_size);
|
||||
strcpy (name, name_buf);
|
||||
#endif
|
||||
sym = obj_add_symbol(f, name, -1,
|
||||
ELFW(ST_INFO) (STB_GLOBAL,
|
||||
STT_NOTYPE),
|
||||
idx, s->value, 0);
|
||||
/* Did our symbol just get installed? If so, mark the
|
||||
module as "used". */
|
||||
if (sym->secidx == idx)
|
||||
@ -2012,9 +2114,9 @@ old_init_module(const char *m_name, struct obj_file *f,
|
||||
/* Fill in routines. */
|
||||
|
||||
routines.init =
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, "init_module"));
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
|
||||
routines.cleanup =
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module"));
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
|
||||
|
||||
/* Whew! All of the initialization is complete. Collect the final
|
||||
module image and give it to the kernel. */
|
||||
@ -2053,7 +2155,7 @@ static int
|
||||
new_process_module_arguments(struct obj_file *f, int argc, char **argv)
|
||||
{
|
||||
while (argc > 0) {
|
||||
char *p, *q, *key;
|
||||
char *p, *q, *key, *sym_name;
|
||||
struct obj_symbol *sym;
|
||||
char *contents, *loc;
|
||||
int min, max, n;
|
||||
@ -2076,7 +2178,14 @@ new_process_module_arguments(struct obj_file *f, int argc, char **argv)
|
||||
return 0;
|
||||
}
|
||||
|
||||
sym = obj_find_symbol(f, key);
|
||||
#ifdef SYMBOL_PREFIX
|
||||
sym_name = alloca (strlen (key) + sizeof SYMBOL_PREFIX);
|
||||
strcpy (sym_name, SYMBOL_PREFIX);
|
||||
strcat (sym_name, key);
|
||||
#else
|
||||
sym_name = key;
|
||||
#endif
|
||||
sym = obj_find_symbol(f, sym_name);
|
||||
|
||||
/* Also check that the parameter was not resolved from the kernel. */
|
||||
if (sym == NULL || sym->secidx > SHN_HIRESERVE) {
|
||||
@ -2440,9 +2549,9 @@ static int new_create_this_module(struct obj_file *f, const char *m_name)
|
||||
sizeof(struct new_module));
|
||||
memset(sec->contents, 0, sizeof(struct new_module));
|
||||
|
||||
obj_add_symbol(f, "__this_module", -1,
|
||||
ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0,
|
||||
sizeof(struct new_module));
|
||||
obj_add_symbol(f, SPFX "__this_module", -1,
|
||||
ELFW(ST_INFO) (STB_LOCAL, STT_OBJECT), sec->idx, 0,
|
||||
sizeof(struct new_module));
|
||||
|
||||
obj_string_patch(f, sec->idx, offsetof(struct new_module, name),
|
||||
m_name);
|
||||
@ -2468,7 +2577,7 @@ static int new_create_module_ksymtab(struct obj_file *f)
|
||||
if (!sec)
|
||||
return 0;
|
||||
|
||||
tm = obj_find_symbol(f, "__this_module");
|
||||
tm = obj_find_symbol(f, SPFX "__this_module");
|
||||
dep = (struct new_module_ref *) sec->contents;
|
||||
for (i = 0; i < n_ext_modules; ++i)
|
||||
if (ext_modules[i].used) {
|
||||
@ -2554,9 +2663,9 @@ new_init_module(const char *m_name, struct obj_file *f,
|
||||
}
|
||||
|
||||
module->init =
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, "init_module"));
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, SPFX "init_module"));
|
||||
module->cleanup =
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, "cleanup_module"));
|
||||
obj_symbol_final_value(f, obj_find_symbol(f, SPFX "cleanup_module"));
|
||||
|
||||
sec = obj_find_section(f, "__ex_table");
|
||||
if (sec) {
|
||||
@ -3201,9 +3310,9 @@ static int obj_load_progbits(FILE * fp, struct obj_file* f, char* imagebase)
|
||||
static void hide_special_symbols(struct obj_file *f)
|
||||
{
|
||||
static const char *const specials[] = {
|
||||
"cleanup_module",
|
||||
"init_module",
|
||||
"kernel_version",
|
||||
SPFX "cleanup_module",
|
||||
SPFX "init_module",
|
||||
SPFX "kernel_version",
|
||||
NULL
|
||||
};
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user