diff options
| -rw-r--r-- | modutils/insmod.c | 869 |
1 files changed, 488 insertions, 381 deletions
diff --git a/modutils/insmod.c b/modutils/insmod.c index a2d718e..cab2cc2 100644 --- a/modutils/insmod.c +++ b/modutils/insmod.c @@ -19,6 +19,13 @@ * very minor changes required to also work with StrongArm and presumably * all ARM based systems. * + * Magnus Damm <damm@opensource.se> 22-May-2002. + * The plt and got code are now using the same structs. + * Added generic linked list code to fully support PowerPC. + * Replaced the mess in arch_apply_relocation() with architecture blocks. + * The arch_create_got() function got cleaned up with architecture blocks. + * These blocks should be easy maintain and sync with obj_xxx.c in modutils. + * * Magnus Damm <damm@opensource.se> added PowerPC support 20-Feb-2001. * PowerPC specific code stolen from modutils-2.3.16, * written by Paul Mackerras, Copyright 1996, 1997 Linux International. @@ -80,37 +87,123 @@ #define LOADBITS 1 #endif -#if defined(__powerpc__) -#define CONFIG_USE_PLT_ENTRIES -#define CONFIG_PLT_ENTRY_SIZE 16 -#endif #if defined(__arm__) #define CONFIG_USE_PLT_ENTRIES #define CONFIG_PLT_ENTRY_SIZE 8 #define CONFIG_USE_GOT_ENTRIES #define CONFIG_GOT_ENTRY_SIZE 8 +#define CONFIG_USE_SINGLE + +#define MATCH_MACHINE(x) (x == EM_ARM) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 #endif -#if defined(__sh__) +#if defined(__i386__) #define CONFIG_USE_GOT_ENTRIES #define CONFIG_GOT_ENTRY_SIZE 4 +#define CONFIG_USE_SINGLE + +#ifndef EM_486 +#define MATCH_MACHINE(x) (x == EM_386) +#else +#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) #endif -#if defined(__i386__) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +#endif + +#if defined(__mc68000__) #define CONFIG_USE_GOT_ENTRIES #define CONFIG_GOT_ENTRY_SIZE 4 +#define CONFIG_USE_SINGLE + +#define MATCH_MACHINE(x) (x == EM_68K) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela #endif #if defined(__mips__) -// neither used +/* Account for ELF spec changes. */ +#ifndef EM_MIPS_RS3_LE +#ifdef EM_MIPS_RS4_BE +#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE +#else +#define EM_MIPS_RS3_LE 10 +#endif +#endif /* !EM_MIPS_RS3_LE */ + +#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) +#define SHT_RELM SHT_REL +#define Elf32_RelM Elf32_Rel +#define ELFCLASSM ELFCLASS32 +#define ARCHDATAM "__dbe_table" +#endif + +#if defined(__powerpc__) +#define CONFIG_USE_PLT_ENTRIES +#define CONFIG_PLT_ENTRY_SIZE 16 +#define CONFIG_USE_PLT_LIST +#define CONFIG_LIST_ARCHTYPE ElfW(Addr) +#define CONFIG_USE_LIST + +#define MATCH_MACHINE(x) (x == EM_PPC) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 +#define ARCHDATAM "__ftr_fixup" +#endif + +#if defined(__sh__) +#define CONFIG_USE_GOT_ENTRIES +#define CONFIG_GOT_ENTRY_SIZE 4 +#define CONFIG_USE_SINGLE + +#define MATCH_MACHINE(x) (x == EM_SH) +#define SHT_RELM SHT_RELA +#define Elf32_RelM Elf32_Rela +#define ELFCLASSM ELFCLASS32 + +/* the SH changes have only been tested on the SH4 in =little endian= mode */ +/* I'm not sure about big endian, so let's warn: */ + +#if (defined(__SH4__) || defined(__SH3__)) && defined(__BIG_ENDIAN__) +#error insmod.c may require changes for use on big endian SH4/SH3 +#endif + +/* it may or may not work on the SH1/SH2... So let's error on those + also */ +#if (defined(__sh__) && (!(defined(__SH3__) || defined(__SH4__)))) +#error insmod.c may require changes for non-SH3/SH4 use +#endif #endif #if defined (__v850e__) #define CONFIG_USE_PLT_ENTRIES #define CONFIG_PLT_ENTRY_SIZE 8 +#define CONFIG_USE_SINGLE + +#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 ELFCLASSM ELFCLASS32 + +#define SYMBOL_PREFIX "_" +#endif + +#ifndef SHT_RELM +#error Sorry, but insmod.c does not yet support this architecture... #endif + //---------------------------------------------------------------------------- //--------modutils module.h, lines 45-242 //---------------------------------------------------------------------------- @@ -140,7 +233,7 @@ #ifndef MODUTILS_MODULE_H static const int MODUTILS_MODULE_H = 1; -#ident "$Id: insmod.c,v 1.82 2002/05/03 10:34:35 andersen Exp $" +#ident "$Id: insmod.c,v 1.83 2002/05/24 06:50:15 andersen Exp $" /* This file contains the structures used by the 2.0 and 2.1 kernels. We do not use the kernel headers directly because we do not wish @@ -282,7 +375,11 @@ struct new_module #endif }; +#ifdef ARCHDATAM +#define ARCHDATA_SEC_NAME ARCHDATAM +#else #define ARCHDATA_SEC_NAME "__archdata" +#endif #define KALLSYMS_SEC_NAME "__kallsyms" @@ -357,7 +454,7 @@ int delete_module(const char *); #ifndef MODUTILS_OBJ_H static const int MODUTILS_OBJ_H = 1; -#ident "$Id: insmod.c,v 1.82 2002/05/03 10:34:35 andersen Exp $" +#ident "$Id: insmod.c,v 1.83 2002/05/24 06:50:15 andersen Exp $" /* The relocatable object is manipulated using elfin types. */ @@ -371,94 +468,6 @@ static const int MODUTILS_OBJ_H = 1; #define ELFDATAM ELFDATA2MSB #endif - -/* Machine-specific elf macros for i386 et al. */ - -/* the SH changes have only been tested on the SH4 in =little endian= mode */ -/* I'm not sure about big endian, so let's warn: */ - -#if (defined(__SH4__) || defined(__SH3__)) && defined(__BIG_ENDIAN__) -#error insmod.c may require changes for use on big endian SH4/SH3 -#endif - -/* it may or may not work on the SH1/SH2... So let's error on those - also */ -#if (defined(__sh__) && (!(defined(__SH3__) || defined(__SH4__)))) -#error insmod.c may require changes for non-SH3/SH4 use -#endif - -#define ELFCLASSM ELFCLASS32 - - -#if defined(__sh__) - -#define MATCH_MACHINE(x) (x == EM_SH) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela - -#elif defined(__arm__) - -#define MATCH_MACHINE(x) (x == EM_ARM) -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel - -#elif defined(__powerpc__) - -#define MATCH_MACHINE(x) (x == EM_PPC) -#define SHT_RELM SHT_RELA -#define Elf32_RelM Elf32_Rela - -#elif defined(__mips__) - -/* Account for ELF spec changes. */ -#ifndef EM_MIPS_RS3_LE -#ifdef EM_MIPS_RS4_BE -#define EM_MIPS_RS3_LE EM_MIPS_RS4_BE -#else -#define EM_MIPS_RS3_LE 10 -#endif -#endif /* !EM_MIPS_RS3_LE */ - -#define MATCH_MACHINE(x) (x == EM_MIPS || x == EM_MIPS_RS3_LE) -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel - -#elif defined(__i386__) - -/* presumably we can use these for anything but the SH and ARM*/ -/* this is the previous behavior, but it does result in - insmod.c being broken on anything except i386 */ -#ifndef EM_486 -#define MATCH_MACHINE(x) (x == EM_386) -#else -#define MATCH_MACHINE(x) (x == EM_386 || x == EM_486) -#endif - -#define SHT_RELM SHT_REL -#define Elf32_RelM Elf32_Rel - -#elif defined(__mc68000__) - -#define MATCH_MACHINE(x) (x == EM_68K) -#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 SYMBOL_PREFIX "_" - -#else -#error Sorry, but insmod.c does not yet support this architecture... -#endif - #ifndef ElfW # if ELFCLASSM == ELFCLASS32 # define ElfW(x) Elf32_ ## x @@ -619,7 +628,7 @@ static enum obj_reloc arch_apply_relocation (struct obj_file *f, struct obj_symbol *sym, ElfW(RelM) *rel, ElfW(Addr) value); -static int arch_create_got (struct obj_file *f); +static void arch_create_got (struct obj_file *f); #ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE static int arch_init_module (struct obj_file *f, struct new_module *); @@ -653,31 +662,27 @@ static int flag_export = 1; /*======================================================================*/ -/* previously, these were named i386_* but since we could be - compiling for the sh, I've renamed them to the more general - arch_* These structures are the same between the x86 and SH, - and we can't support anything else right now anyway. In the - future maybe they should be #if defined'd */ - -/* Done ;-) */ +#if defined(CONFIG_USE_LIST) - - -#if defined(CONFIG_USE_PLT_ENTRIES) -struct arch_plt_entry +struct arch_list_entry { - int offset; - int allocated:1; - int inited:1; /* has been set up */ + struct arch_list_entry *next; + CONFIG_LIST_ARCHTYPE addend; + int offset; + int inited : 1; }; + #endif -#if defined(CONFIG_USE_GOT_ENTRIES) -struct arch_got_entry { +#if defined(CONFIG_USE_SINGLE) + +struct arch_single_entry +{ int offset; - unsigned offset_done:1; - unsigned reloc_done:1; + int inited : 1; + int allocated : 1; }; + #endif #if defined(__mips__) @@ -705,10 +710,14 @@ struct arch_file { struct arch_symbol { struct obj_symbol root; #if defined(CONFIG_USE_PLT_ENTRIES) - struct arch_plt_entry pltent; +#if defined(CONFIG_USE_PLT_LIST) + struct arch_list_entry *pltent; +#else + struct arch_single_entry pltent; +#endif #endif #if defined(CONFIG_USE_GOT_ENTRIES) - struct arch_got_entry gotent; + struct arch_single_entry gotent; #endif }; @@ -766,15 +775,7 @@ static struct obj_file *arch_new_file(void) struct arch_file *f; f = xmalloc(sizeof(*f)); -#if defined(CONFIG_USE_PLT_ENTRIES) - f->plt = NULL; -#endif -#if defined(CONFIG_USE_GOT_ENTRIES) - f->got = NULL; -#endif -#if defined(__mips__) - f->mips_hi16_list = NULL; -#endif + memset(f, 0, sizeof(*f)); return &f->root; } @@ -789,12 +790,7 @@ static struct obj_symbol *arch_new_symbol(void) struct arch_symbol *sym; sym = xmalloc(sizeof(*sym)); -#if defined(CONFIG_USE_PLT_ENTRIES) - memset(&sym->pltent, 0, sizeof(sym->pltent)); -#endif -#if defined(CONFIG_USE_GOT_ENTRIES) - memset(&sym->gotent, 0, sizeof(sym->gotent)); -#endif + memset(sym, 0, sizeof(*sym)); return &sym->root; } @@ -807,100 +803,164 @@ arch_apply_relocation(struct obj_file *f, ElfW(RelM) *rel, ElfW(Addr) v) { struct arch_file *ifile = (struct arch_file *) f; -#if !(defined(__mips__)) - struct arch_symbol *isym = (struct arch_symbol *) sym; -#endif - + enum obj_reloc ret = obj_reloc_ok; ElfW(Addr) *loc = (ElfW(Addr) *) (targsec->contents + rel->r_offset); ElfW(Addr) dot = targsec->header.sh_addr + rel->r_offset; +#if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) + struct arch_symbol *isym = (struct arch_symbol *) sym; +#endif #if defined(CONFIG_USE_GOT_ENTRIES) ElfW(Addr) got = ifile->got ? ifile->got->header.sh_addr : 0; #endif #if defined(CONFIG_USE_PLT_ENTRIES) ElfW(Addr) plt = ifile->plt ? ifile->plt->header.sh_addr : 0; - struct arch_plt_entry *pe; unsigned long *ip; +#if defined(CONFIG_USE_PLT_LIST) + struct arch_list_entry *pe; +#else + struct arch_single_entry *pe; +#endif #endif - enum obj_reloc ret = obj_reloc_ok; switch (ELF32_R_TYPE(rel->r_info)) { -/* even though these constants seem to be the same for - the i386 and the sh, we "#if define" them for clarity - and in case that ever changes */ -#if defined(__sh__) - case R_SH_NONE: -#elif defined(__arm__) + +#if defined(__arm__) case R_ARM_NONE: + break; + + case R_ARM_ABS32: + *loc += v; + break; + + case R_ARM_GOT32: + goto bb_use_got; + + case R_ARM_GOTPC: + /* relative reloc, always to _GLOBAL_OFFSET_TABLE_ + * (which is .got) similar to branch, + * but is full 32 bits relative */ + + assert(got); + *loc += got - dot; + break; + + case R_ARM_PC24: + case R_ARM_PLT32: + goto bb_use_plt; + + case R_ARM_GOTOFF: /* address relative to the got */ + assert(got); + *loc += v - got; + break; + #elif defined(__i386__) + case R_386_NONE: -#elif defined(__mc68000__) - case R_68K_NONE: -#elif defined(__powerpc__) - 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; + case R_386_32: + *loc += v; break; -#else /* !__v850e__ */ -#if defined(__sh__) - case R_SH_DIR32: -#elif defined(__arm__) - case R_ARM_ABS32: -#elif defined(__i386__) - case R_386_32: -#elif defined(__mc68000__) + + case R_386_PLT32: + case R_386_PC32: + *loc += v - dot; + break; + + case R_386_GLOB_DAT: + case R_386_JMP_SLOT: + *loc = v; + break; + + case R_386_RELATIVE: + *loc += f->baseaddr; + break; + + case R_386_GOTPC: + assert(got != 0); + *loc += got - dot; + break; + + case R_386_GOT32: + goto bb_use_got; + + case R_386_GOTOFF: + assert(got != 0); + *loc += v - got; + break; + +#elif defined(__mc68000__) + + case R_68K_NONE: + break; + case R_68K_32: -#elif defined(__powerpc__) - case R_PPC_ADDR32: -#elif defined(__mips__) - case R_MIPS_32: -#endif *loc += v; break; -#endif /* __v850e__ */ -#if defined(__mc68000__) - case R_68K_8: - if (v > 0xff) - ret = obj_reloc_overflow; + case R_68K_8: + if (v > 0xff) { + ret = obj_reloc_overflow; + } *(char *)loc = v; break; - case R_68K_16: - if (v > 0xffff) - ret = obj_reloc_overflow; + + case R_68K_16: + if (v > 0xffff) { + ret = obj_reloc_overflow; + } *(short *)loc = v; break; -#endif /* __mc68000__ */ -#if defined(__powerpc__) - case R_PPC_ADDR16_HA: - *(unsigned short *)loc = (v + 0x8000) >> 16; + case R_68K_PC8: + v -= dot; + if ((Elf32_Sword)v > 0x7f || + (Elf32_Sword)v < -(Elf32_Sword)0x80) { + ret = obj_reloc_overflow; + } + *(char *)loc = v; break; - case R_PPC_ADDR16_HI: - *(unsigned short *)loc = v >> 16; + case R_68K_PC16: + v -= dot; + if ((Elf32_Sword)v > 0x7fff || + (Elf32_Sword)v < -(Elf32_Sword)0x8000) { + ret = obj_reloc_overflow; + } + *(short *)loc = v; break; - case R_PPC_ADDR16_LO: - *(unsigned short *)loc = v; + case R_68K_PC32: + *(int *)loc = v - dot; + break; + + case R_68K_GLOB_DAT: + case R_68K_JMP_SLOT: + *loc = v; + break; + + case R_68K_RELATIVE: + *(int *)loc += f->baseaddr; + break; + + case R_68K_GOT32: + goto bb_use_got; + + case R_68K_GOTOFF: + assert(got != 0); + *loc += v - got; + break; + +#elif defined(__mips__) + + case R_MIPS_NONE: + break; + + case R_MIPS_32: + *loc += v; break; -#endif -#if defined(__mips__) case R_MIPS_26: if (v % 4) ret = obj_reloc_dangerous; @@ -978,63 +1038,110 @@ arch_apply_relocation(struct obj_file *f, *loc = insnlo; break; } -#endif -#if defined(__arm__) +#elif defined(__powerpc__) + + case R_PPC_ADDR16_HA: + *(unsigned short *)loc = (v + 0x8000) >> 16; + break; + + case R_PPC_ADDR16_HI: + *(unsigned short *)loc = v >> 16; + break; + + case R_PPC_ADDR16_LO: + *(unsigned short *)loc = v; + break; + + case R_PPC_REL24: + goto bb_use_plt; + + case R_PPC_REL32: + *loc = v - dot; + break; + + case R_PPC_ADDR32: + *loc = v; + break; + #elif defined(__sh__) - case R_SH_REL32: - *loc += v - dot; + + case R_SH_NONE: break; -#elif defined(__i386__) - case R_386_PLT32: - case R_386_PC32: + + case R_SH_DIR32: + *loc += v; + break; + + case R_SH_REL32: *loc += v - dot; break; -#elif defined(__mc68000__) - case R_68K_PC8: - v -= dot; - if ((Elf32_Sword)v > 0x7f || (Elf32_Sword)v < -(Elf32_Sword)0x80) - ret = obj_reloc_overflow; - *(char *)loc = v; - break; - case R_68K_PC16: - v -= dot; - if ((Elf32_Sword)v > 0x7fff || (Elf32_Sword)v < -(Elf32_Sword)0x8000) - ret = obj_reloc_overflow; - *(short *)loc = v; + + case R_SH_PLT32: + *loc = v - dot; break; - case R_68K_PC32: - *(int *)loc = v - dot; + + case R_SH_GLOB_DAT: + case R_SH_JMP_SLOT: + *loc = v; break; -#elif defined(__powerpc__) - case R_PPC_REL32: - *loc = v - dot; + + case R_SH_RELATIVE: + *loc = f->baseaddr + rel->r_addend; break; -#endif -#if defined(__sh__) - case R_SH_PLT32: - *loc = v - dot; - break; -#elif defined(__i386__) -#endif + case R_SH_GOTPC: + assert(got != 0); + *loc = got - dot + rel->r_addend; + break; -#if defined(CONFIG_USE_PLT_ENTRIES) + case R_SH_GOT32: + goto bb_use_got; + + case R_SH_GOTOFF: + assert(got != 0); + *loc = v - got; + break; -#if defined(__arm__) - case R_ARM_PC24: - case R_ARM_PLT32: -#endif -#if defined(__powerpc__) - case R_PPC_REL24: #endif + + default: + printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info)); + ret = obj_reloc_unhandled; + break; + #if defined (__v850e__) + case R_V850_NONE: + break; + + 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; + case R_V850_22_PCREL: + goto bb_use_plt; #endif + +#if defined(CONFIG_USE_PLT_ENTRIES) + + bb_use_plt: + /* find the plt entry and initialize it if necessary */ assert(isym != NULL); - pe = (struct arch_plt_entry*) &isym->pltent; +#if defined(CONFIG_USE_PLT_LIST) + for (pe = isym->pltent; pe != NULL && pe->addend != rel->r_addend;) + pe = pe->next; + assert(pe != NULL); +#else + pe = &isym->pltent; +#endif if (! pe->inited) { ip = (unsigned long *) (ifile->plt->contents + pe->offset); @@ -1065,19 +1172,19 @@ arch_apply_relocation(struct obj_file *f, v -= dot; /* if the target is too far away.... */ #if defined (__arm__) || defined (__powerpc__) - if ((int)v < -0x02000000 || (int)v >= 0x02000000) + 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; + /* go via the plt */ + v = plt + pe->offset - dot; #if defined (__v850e__) if (v & 1) #else if (v & 3) #endif - ret = obj_reloc_dangerous; + ret = obj_reloc_dangerous; /* merge the offset into the instruction. */ #if defined(__arm__) @@ -1099,75 +1206,16 @@ arch_apply_relocation(struct obj_file *f, ((unsigned short *)loc)[1] = (v & 0xffff); /* offs low part */ #endif - break; #endif /* CONFIG_USE_PLT_ENTRIES */ -#if defined(__arm__) -#elif defined(__sh__) - case R_SH_GLOB_DAT: - case R_SH_JMP_SLOT: - *loc = v; - break; -#elif defined(__i386__) - case R_386_GLOB_DAT: - case R_386_JMP_SLOT: - *loc = v; - break; -#elif defined(__mc68000__) - case R_68K_GLOB_DAT: - case R_68K_JMP_SLOT: - *loc = v; - break; -#endif - -#if defined(__arm__) -#elif defined(__sh__) - case R_SH_RELATIVE: - *loc += f->baseaddr + rel->r_addend; - break; -#elif defined(__i386__) - case R_386_RELATIVE: - *loc += f->baseaddr; - break; -#elif defined(__mc68000__) - case R_68K_RELATIVE: - *(int *)loc += f->baseaddr; - break; -#endif - #if defined(CONFIG_USE_GOT_ENTRIES) + bb_use_got: -#if !defined(__68k__) -#if defined(__sh__) - case R_SH_GOTPC: -#elif defined(__arm__) - case R_ARM_GOTPC: -#elif defined(__i386__) - case R_386_GOTPC: -#endif - assert(got != 0); -#if defined(__sh__) - *loc += got - dot + rel->r_addend;; -#elif defined(__i386__) || defined(__arm__) || defined(__m68k_) - *loc += got - dot; -#endif - break; -#endif // __68k__ - -#if defined(__sh__) - case R_SH_GOT32: -#elif defined(__arm__) - case R_ARM_GOT32: -#elif defined(__i386__) - case R_386_GOT32: -#elif defined(__mc68000__) - case R_68K_GOT32: -#endif assert(isym != NULL); /* needs an entry in the .got: set it, once */ - if (!isym->gotent.reloc_done) { - isym->gotent.reloc_done = 1; + if (!isym->gotent.inited) { + isym->gotent.inited = 1; *(ElfW(Addr) *) (ifile->got->contents + isym->gotent.offset) = v; } /* make the reloc with_respect_to_.got */ @@ -1178,43 +1226,90 @@ arch_apply_relocation(struct obj_file *f, #endif break; - /* address relative to the got */ -#if !defined(__mc68000__) -#if defined(__sh__) - case R_SH_GOTOFF: -#elif defined(__arm__) - case R_ARM_GOTOFF: -#elif defined(__i386__) - case R_386_GOTOFF: -#elif defined(__mc68000__) - case R_68K_GOTOFF: +#endif /* CONFIG_USE_GOT_ENTRIES */ + } + + return ret; +} + + +#if defined(CONFIG_USE_LIST) + +static int arch_list_add(ElfW(RelM) *rel, struct arch_list_entry **list, + int offset, int size) +{ + struct arch_list_entry *pe; + + for (pe = *list; pe != NULL; pe = pe->next) { + if (pe->addend == rel->r_addend) { + break; + } + } + + if (pe == NULL) { + pe = xmalloc(sizeof(struct arch_list_entry)); + pe->next = *list; + pe->addend = rel->r_addend; + pe->offset = offset; + pe->inited = 0; + *list = pe; + return size; + } + return 0; +} + #endif - assert(got != 0); - *loc += v - got; - break; -#endif // __mc68000__ -#endif /* CONFIG_USE_GOT_ENTRIES */ +#if defined(CONFIG_USE_SINGLE) - default: - printf("Warning: unhandled reloc %d\n",(int)ELF32_R_TYPE(rel->r_info)); - ret = obj_reloc_unhandled; - break; +static int arch_single_init(ElfW(RelM) *rel, struct arch_single_entry *single, + int offset, int size) +{ + if (single->allocated == 0) { + single->allocated = 1; + single->offset = offset; + single->inited = 0; + return size; } + return 0; +} - return ret; +#endif + +#if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) + +static struct obj_section *arch_xsect_init(struct obj_file *f, char *name, + int offset, int size) +{ + struct obj_section *myrelsec = obj_find_section(f, name); + + if (offset == 0) { + offset += size; + } + + if (myrelsec) { + obj_extend_section(myrelsec, offset); + } else { + myrelsec = obj_create_alloced_section(f, name, + size, offset); + assert(myrelsec); + } + + return myrelsec; } -static int arch_create_got(struct obj_file *f) +#endif + +static void arch_create_got(struct obj_file *f) { #if defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) struct arch_file *ifile = (struct arch_file *) f; int i; #if defined(CONFIG_USE_GOT_ENTRIES) - int got_offset = 0, gotneeded = 0; + int got_offset = 0, got_needed = 0, got_allocate; #endif #if defined(CONFIG_USE_PLT_ENTRIES) - int plt_offset = 0, pltneeded = 0; + int plt_offset = 0, plt_needed = 0, plt_allocate; #endif struct obj_section *relsec, *symsec, *strsec; ElfW(RelM) *rel, *relend; @@ -1238,54 +1333,69 @@ static int arch_create_got(struct obj_file *f) for (; rel < relend; ++rel) { extsym = &symtab[ELF32_R_SYM(rel->r_info)]; +#if defined(CONFIG_USE_GOT_ENTRIES) + got_allocate = 0; +#endif +#if defined(CONFIG_USE_PLT_ENTRIES) + plt_allocate = 0; +#endif + switch (ELF32_R_TYPE(rel->r_info)) { #if defined(__arm__) - case R_ARM_GOT32: + case R_ARM_PC24: + case R_ARM_PLT32: + plt_allocate = 1; break; -#elif defined(__sh__) - case R_SH_GOT32: + + case R_ARM_GOTOFF: + case R_ARM_GOTPC: + got_needed = 1; + continue; + + case R_ARM_GOT32: + got_allocate = 1; break; + #elif defined(__i386__) + case R_386_GOTPC: + case R_386_GOTOFF: + got_needed = 1; + continue; + case R_386_GOT32: + got_allocate = 1; break; -#elif defined(__mc68000__) - case R_68K_GOT32: - break; -#endif -#if defined(__powerpc__) +#elif defined(__powerpc__) case R_PPC_REL24: - pltneeded = 1; + plt_allocate = 1; break; -#endif -#if defined (__v850e__) - case R_V850_22_PCREL: - pltneeded = 1; +#elif defined(__mc68000__) + case R_68K_GOT32: + got_allocate = 1; break; -#endif -#if defined(__arm__) - case R_ARM_PC24: - case R_ARM_PLT32: - pltneeded = 1; - break; + case R_68K_GOTOFF: + got_needed = 1; + continue; - case R_ARM_GOTPC: - case R_ARM_GOTOFF: - gotneeded = 1; - if (got_offset == 0) - got_offset = 4; #elif defined(__sh__) + case R_SH_GOT32: + got_allocate = 1; + break; + case R_SH_GOTPC: case R_SH_GOTOFF: - gotneeded = 1; -#elif defined(__i386__) - case R_386_GOTPC: - case R_386_GOTOFF: - gotneeded = 1; -#endif + got_needed = 1; + continue; + +#elif defined (__v850e__) + case R_V850_22_PCREL: + plt_needed = 1; + break; +#endif default: continue; } @@ -1297,49 +1407,46 @@ static int arch_create_got(struct obj_file *f) } intsym = (struct arch_symbol *) obj_find_symbol(f, name); #if defined(CONFIG_USE_GOT_ENTRIES) - if (!intsym->gotent.offset_done) { - intsym->gotent.offset_done = 1; - intsym->gotent.offset = got_offset; - got_offset += CONFIG_GOT_ENTRY_SIZE; + if (got_allocate) { + got_offset += arch_single_init( + rel, &intsym->gotent, + got_offset, CONFIG_GOT_ENTRY_SIZE); + + got_needed = 1; } #endif #if defined(CONFIG_USE_PLT_ENTRIES) - if (pltneeded && intsym->pltent.allocated == 0) { - intsym->pltent.allocated = 1; - intsym->pltent.offset = plt_offset; - plt_offset += CONFIG_PLT_ENTRY_SIZE; - intsym->pltent.inited = 0; - pltneeded = 0; + if (plt_allocate) { +#if defined(CONFIG_USE_PLT_LIST) + plt_offset += arch_list_add( + rel, &intsym->pltent, + plt_offset, CONFIG_PLT_ENTRY_SIZE); +#else + plt_offset += arch_single_init( + rel, &intsym->pltent, + plt_offset, CONFIG_PLT_ENTRY_SIZE); +#endif + plt_needed = 1; } #endif } } #if defined(CONFIG_USE_GOT_ENTRIES) - if (got_offset) { - struct obj_section* myrelsec = obj_find_section(f, ".got"); - - if (myrelsec) { - obj_extend_section(myrelsec, got_offset); - } else { - myrelsec = obj_create_alloced_section(f, ".got", - CONFIG_GOT_ENTRY_SIZE, - got_offset); - assert(myrelsec); - } - - ifile->got = myrelsec; + if (got_needed) { + ifile->got = arch_xsect_init(f, ".got", got_offset, + CONFIG_GOT_ENTRY_SIZE); } #endif #if defined(CONFIG_USE_PLT_ENTRIES) - if (plt_offset) - ifile->plt = obj_create_alloced_section(f, ".plt", - CONFIG_PLT_ENTRY_SIZE, - plt_offset); -#endif + if (plt_needed) { + ifile->plt = arch_xsect_init(f, ".plt", plt_offset, + CONFIG_PLT_ENTRY_SIZE); + } #endif - return 1; + +#endif /* defined(CONFIG_USE_GOT_ENTRIES) || defined(CONFIG_USE_PLT_ENTRIES) */ } #ifdef CONFIG_FEATURE_NEW_MODULE_INTERFACE |