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t_elf32ppcbe.c
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t_elf32ppcbe.c
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/* $VER: vlink t_elf32ppcbe.c V0.15a (28.02.15)
*
* This file is part of vlink, a portable linker for multiple
* object formats.
* Copyright (c) 1997-2015 Frank Wille
*/
#include "config.h"
#if defined(ELF32_PPC_BE) || defined(ELF32_AMIGA)
#define T_ELF32PPCBE_C
#include "vlink.h"
#include "elf32.h"
#include "rel_elfppc.h"
#define SBSS_MAXSIZE (4) /* objects up to 4 bytes into .sbss */
static int ppc32be_identify(struct GlobalVars *,char *,uint8_t *,unsigned long,bool);
static void ppc32be_readconv(struct GlobalVars *,struct LinkFile *);
#if defined(ELF32_PPC_BE) || defined(ELF32_AMIGA)
static struct Symbol *ppc32be_dynentry(struct GlobalVars *,DynArg,int);
static void ppc32be_dyncreate(struct GlobalVars *);
static void ppc32be_writeobject(struct GlobalVars *,FILE *);
static void ppc32be_writeshared(struct GlobalVars *,FILE *);
static void ppc32be_writeexec(struct GlobalVars *,FILE *);
struct FFFuncs fff_elf32ppcbe = {
"elf32ppcbe",
NULL,
NULL,
NULL,
NULL,
elf32_headersize,
ppc32be_identify,
ppc32be_readconv,
NULL,
elf_targetlink,
NULL,
elf_lnksym,
elf_setlnksym,
elf32_initdynlink,
ppc32be_dynentry,
ppc32be_dyncreate,
ppc32be_writeobject,
ppc32be_writeshared,
ppc32be_writeexec,
bss_name,sbss_name,
0x10000,
0x8000,
4,
0,
RTAB_ADDEND,RTAB_ADDEND,
_BIG_ENDIAN_,
32,2
};
#endif
#ifdef ELF32_AMIGA
static int amiga_targetlink(struct GlobalVars *,struct LinkedSection *,
struct Section *);
static struct Symbol *amiga_lnksym(struct GlobalVars *,struct Section *,
struct Reloc *);
static void amiga_setlnksym(struct GlobalVars *,struct Symbol *);
static void amiga_writeobject(struct GlobalVars *,FILE *);
static void amiga_writeshared(struct GlobalVars *,FILE *);
static void amiga_writeexec(struct GlobalVars *,FILE *);
static void morphos_writeexec(struct GlobalVars *,FILE *);
struct FFFuncs fff_elf32powerup = {
"elf32powerup",
NULL,
NULL,
NULL,
NULL,
elf32_headersize,
ppc32be_identify,
ppc32be_readconv,
NULL,
amiga_targetlink,
NULL,
amiga_lnksym,
amiga_setlnksym,
NULL,NULL,NULL,
amiga_writeobject,
amiga_writeshared,
amiga_writeexec,
bss_name,sbss_name,
0,
0x8000,
4,
0,
RTAB_ADDEND,RTAB_ADDEND,
_BIG_ENDIAN_,
32,2,
FFF_RELOCATABLE|FFF_PSEUDO_DYNLINK
};
struct FFFuncs fff_elf32morphos = {
"elf32morphos",
NULL,
NULL,
NULL,
NULL,
elf32_headersize,
ppc32be_identify,
ppc32be_readconv,
NULL,
elf_targetlink,
NULL,
amiga_lnksym,
amiga_setlnksym,
NULL,NULL,NULL,
amiga_writeobject,
amiga_writeshared,
morphos_writeexec,
bss_name,sbss_name,
0,
0x8000,
4,
0,
RTAB_ADDEND,RTAB_ADDEND,
_BIG_ENDIAN_,
32,2,
FFF_RELOCATABLE
};
struct FFFuncs fff_elf32amigaos = {
"elf32amigaos",
NULL,
NULL,
NULL,
NULL,
elf32_headersize,
ppc32be_identify,
ppc32be_readconv,
NULL,
elf_targetlink,
NULL,
elf_lnksym,
elf_setlnksym,
elf32_initdynlink,
ppc32be_dynentry,
ppc32be_dyncreate,
ppc32be_writeobject,
ppc32be_writeshared,
ppc32be_writeexec,
bss_name,sbss_name,
0x10000,
0x8000,
4,
0,
RTAB_ADDEND,RTAB_ADDEND,
_BIG_ENDIAN_,
32,2,
FFF_DYN_RESOLVE_ALL
};
/* elf32powerup/elf32morphos linker symbols */
static char linkerdb[] = "_LinkerDB";
static char sdatasize[] = "__sdata_size";
static char sbsssize[] = "__sbss_size";
static char ddrelocs[] = "__datadata_relocs";
static char textsize[] = "__text_size";
#define LINKERDB 0 /* _LinkerDB, powerup/morphos */
#define R13INIT 1 /* __r13_init, morphos */
#define SDATASIZE 2 /* __sdata_size, morphos */
#define SBSSSIZE 3 /* __sbss_size, morphos */
#define DDRELOCS 4 /* __datadata_relocs, morphos */
#define TEXTSIZE 5 /* __text_size, morphos */
static char ddrelocs_name[] = "ddrelocs";
#endif
/*****************************************************************/
/* Read ELF */
/*****************************************************************/
static int ppc32be_identify(struct GlobalVars *gv,char *name,uint8_t *p,
unsigned long plen,bool lib)
/* identify ELF-PPC-32Bit-BigEndian */
{
int id;
/* first check for ancient PowerPC machine types */
if ((id = elf_identify(&fff_elf32ppcbe,name,p,plen,ELFCLASS32,ELFDATA2MSB,
EM_CYGNUS_POWERPC,ELF_VER)) != ID_UNKNOWN)
return id;
/* EM_PPC_OLD is used in Motorola's libmoto.a, for example... */
if ((id = elf_identify(&fff_elf32ppcbe,name,p,plen,ELFCLASS32,ELFDATA2MSB,
EM_PPC_OLD,ELF_VER)) != ID_UNKNOWN)
return id;
/* the normal case: EM_PPC */
return elf_identify(&fff_elf32ppcbe,name,p,plen,ELFCLASS32,ELFDATA2MSB,
EM_PPC,ELF_VER);
}
static uint8_t setupRI(uint8_t rtype,struct ELF2vlink *convert,
struct RelocInsert *ri1,struct RelocInsert *ri2)
{
ri1->bpos = convert[rtype].bpos;
ri1->bsiz = convert[rtype].bsiz;
if ((ri1->mask = convert[rtype].mask) == 0) {
/* @ha mode - add a second RelocInsert */
memset(ri2,0,sizeof(struct RelocInsert));
ri1->next = ri2;
ri1->mask = 0xffff0000;
ri2->bsiz = 16;
ri2->mask = 0x8000;
}
return convert[rtype].rtype;
}
static uint8_t ppc32_reloc_elf2vlink(uint8_t rtype,struct RelocInsert *ri)
/* Determine vlink internal reloc type from ELF reloc type and fill in
reloc-insert description information.
All fields of the RelocInsert structure are preset to zero. */
{
/* Reloc conversion table for V.4-ABI @@@ not complete! */
static struct ELF2vlink convertV4[] = {
R_NONE,0,0,-1,
R_ABS,0,32,-1, /* R_PPC_ADDR32 */
R_ABS,6,24,~3, /* R_PPC_ADDR24 */
R_ABS,0,16,-1, /* R_PPC_ADDR16 */
R_ABS,0,16,0xffff, /* R_PPC_ADDR16_LO */
R_ABS,0,16,0xffff0000, /* R_PPC_ADDR16_HI */
R_ABS,0,16,0, /* R_PPC_ADDR16_HA */
R_ABS,16,14,~3, /* R_PPC_ADDR14 */
R_ABS,16,14,~3, /* R_PPC_ADDR14_BRTAKEN */
R_ABS,16,14,~3, /* R_PPC_ADDR14_BRNTAKEN */
R_PC,6,24,~3, /* R_PPC_REL24 */
R_PC,16,14,~3, /* R_PPC_REL14 */
R_PC,16,14,~3, /* R_PPC_REL14_BRTAKEN */
R_PC,16,14,~3, /* R_PPC_REL14_BRNTAKEN */
R_GOT,0,16,-1, /* R_PPC_GOT16 */
R_GOT,0,16,0xffff, /* R_PPC_GOT16_LO */
R_GOT,0,16,0xffff0000, /* R_PPC_GOT16_HI */
R_GOT,0,16,0, /* R_PPC_GOT16_HA */
R_PLTPC,6,24,~3, /* R_PPC_PLTREL24 */
R_COPY,0,32,-1, /* R_PPC_COPY */
R_GLOBDAT,0,32,-1, /* R_PPC_GLOB_DAT */
R_JMPSLOT,0,64,-1, /* R_PPC_JMP_SLOT */
R_LOADREL,0,32,-1, /* R_PPC_RELATIVE */
R_LOCALPC,6,24,~3, /* R_PPC_LOCAL24PC */
R_UABS,0,32,-1, /* R_PPC_UADDR32 */
R_UABS,0,16,-1, /* R_PPC_UADDR16 */
R_PC,0,32,-1, /* R_PPC_REL32 */
R_PLT,0,32,-1, /* R_PPC_PLT32 */
R_PLTPC,0,32,-1, /* R_PPC_PLTREL32 */
R_PLT,0,16,0xffff, /* R_PPC_PLT16_LO */
R_PLT,0,16,0xffff0000, /* R_PPC_PLT16_HI */
R_PLT,0,16,0, /* R_PPC_PLT16_HA */
R_SD,0,16,-1, /* R_PPC_SDAREL16 */
R_SECOFF,0,16,-1, /* R_PPC_SECTOFF */
R_SECOFF,0,16,0xffff, /* R_PPC_SECTOFF_LO */
R_SECOFF,0,16,0xffff0000, /* R_PPC_SECTOFF_HI */
R_SECOFF,0,16,0, /* R_PPC_SECTOFF_HA */
R_ABS,0,30,~3 /* R_PPC_ADDR30 */
};
/* Reloc conversion table for PPC-EABI @@@ not complete! */
static struct ELF2vlink convertEABI[] = {
R_NONE,0,0,-1, /* R_PPC_EMB_NADDR32 */
R_NONE,0,0,-1, /* R_PPC_EMB_NADDR16 */
R_NONE,0,0,-1, /* R_PPC_EMB_NADDR16_LO */
R_NONE,0,0,-1, /* R_PPC_EMB_NADDR16_HI */
R_NONE,0,0,-1, /* R_PPC_EMB_NADDR16_HA */
R_NONE,0,0,-1, /* R_PPC_EMB_SDAI16 */
R_NONE,0,0,-1, /* R_PPC_EMB_SDA2I16 */
R_SD2,0,16,-1, /* R_PPC_EMB_SDA2REL */
R_SD21,16,16,-1, /* R_PPC_EMB_SDA21 */
R_NONE,0,0,-1, /* R_PPC_EMB_MRKREF */
R_NONE,0,0,-1, /* R_PPC_EMB_RELSEC16 */
R_NONE,0,0,-1, /* R_PPC_EMB_RELST_LO */
R_NONE,0,0,-1, /* R_PPC_EMB_RELST_HI */
R_NONE,0,0,-1, /* R_PPC_EMB_RELST_HA */
R_NONE,0,0,-1, /* R_PPC_EMB_BIT_FLD */
R_NONE,0,0,-1 /* R_PPC_EMB_RELSDA */
};
/* Reloc conversion table for MorphOS */
static struct ELF2vlink convertMOS[] = {
R_MOSDREL,0,16,-1, /* R_PPC_MORPHOS_DREL */
R_MOSDREL,0,16,0xffff, /* R_PPC_MORPHOS_DREL_LO */
R_MOSDREL,0,16,0xffff0000, /* R_PPC_MORPHOS_DREL_HI */
R_MOSDREL,0,16,0, /* R_PPC_MORPHOS_DREL_HA */
};
/* Reloc conversion table for AmigaOS/PPC */
static struct ELF2vlink convertAOS[] = {
R_AOSBREL,0,16,-1, /* R_PPC_AMIGAOS_BREL */
R_AOSBREL,0,16,0xffff, /* R_PPC_AMIGAOS_BREL_LO */
R_AOSBREL,0,16,0xffff0000, /* R_PPC_AMIGAOS_BREL_HI */
R_AOSBREL,0,16,0, /* R_PPC_AMIGAOS_BREL_HA */
};
static struct RelocInsert ri2;
/* @@@ BRTAKEN/BRNTAKEN could get a special treatment by setting
bsiz to 0 and use the next-pointer as a special function pointer */
if (rtype <= R_PPC_ADDR30)
return setupRI(rtype,convertV4,ri,&ri2);
else if (rtype>=R_PPC_EMB_NADDR32 && rtype<=R_PPC_EMB_RELSDA)
return setupRI(rtype-R_PPC_EMB_NADDR32,convertEABI,ri,&ri2);
else if (rtype>=R_PPC_MORPHOS_DREL && rtype<=R_PPC_MORPHOS_DREL_HA)
return setupRI(rtype-R_PPC_MORPHOS_DREL,convertMOS,ri,&ri2);
else if (rtype>=R_PPC_AMIGAOS_BREL && rtype<=R_PPC_AMIGAOS_BREL_HA)
return setupRI(rtype-R_PPC_AMIGAOS_BREL,convertAOS,ri,&ri2);
return R_NONE;
}
static void ppc32be_readconv(struct GlobalVars *gv,struct LinkFile *lf)
/* Read elfppc32be executable / object / shared obj. */
{
if (lf->type == ID_LIBARCH) {
struct ar_info ai;
if (ar_init(&ai,(char *)lf->data,lf->length,lf->filename)) {
while (ar_extract(&ai)) {
lf->objname = allocstring(ai.name);
if (elf_check_ar_type(fff[lf->format],lf->pathname,ai.data,
ELFCLASS32,ELFDATA2MSB,ELF_VER,
3,EM_PPC,EM_PPC_OLD,EM_CYGNUS_POWERPC))
elf32_parse(gv,lf,(struct Elf32_Ehdr *)ai.data,
ppc32_reloc_elf2vlink);
}
}
else
ierror("ppc32be_readconv(): archive %s corrupted since last access",
lf->pathname);
}
else {
lf->objname = lf->filename;
elf32_parse(gv,lf,(struct Elf32_Ehdr *)lf->data,ppc32_reloc_elf2vlink);
}
}
static struct Symbol *ppc32be_dynentry(struct GlobalVars *gv,DynArg a,int etype)
/* Create an entry into .got/.plt/.bss for the referenced symbol. */
{
struct Symbol *entry_sym = NULL;
struct Section *sec;
const char *bssname;
switch (etype) {
case GOT_ENTRY:
case GOT_LOCAL:
/* .got has 4 reserved words at the beginning,
is writable and executable (contains a blrl in first word),
a new entry occupies 1 word. */
sec = elf_dyntable(gv,16,16,ST_DATA,SF_ALLOC,SP_READ|SP_WRITE|SP_EXEC,
GOT_ENTRY);
entry_sym = elf32_pltgotentry(gv,sec,a,SYMI_OBJECT,4,4,etype);
break;
case PLT_ENTRY:
/* .plt has 18 reserved words at the beginning,
is writable and executable, but uninitialized for PPC,
a new entry occupies 2 words and 1 additional word at the end */
sec = elf_dyntable(gv,72,72,ST_UDATA,SF_ALLOC|SF_UNINITIALIZED,
SP_READ|SP_WRITE|SP_EXEC,PLT_ENTRY);
entry_sym = elf32_pltgotentry(gv,sec,a,SYMI_FUNC,8,12,PLT_ENTRY);
break;
case BSS_ENTRY:
/* small objects are copied to .sbss, larger ones to .bss */
bssname = (a.sym->size <= SBSS_MAXSIZE) ? sbss_name : bss_name;
entry_sym = elf32_bssentry(gv,bssname,a.sym);
break;
case STR_ENTRY:
/* enter StrTabList .dynstr */
elf_adddynstr(a.name);
break;
case SYM_ENTRY:
/* enter SymTabList .dynsym and name to .dynstr */
elf_adddynsym(a.sym);
break;
case SO_NEEDED:
/* denote shared object's name as 'needed' */
elf32_dynamicentry(gv,DT_NEEDED,elf_adddynstr(a.name),NULL);
break;
default:
ierror("ppc32be_dynentry(): illegal entrytype: %d",etype);
break;
}
return entry_sym;
}
static void ppc32be_dyncreate(struct GlobalVars *gv)
{
elf32_dyncreate(gv,plt_name);
}
#ifdef ELF32_AMIGA
static struct Section *ddrelocs_sec(struct GlobalVars *gv,
struct LinkedSection *sdata)
{
struct Section *s;
struct LinkedSection *ls;
struct ObjectUnit *obj;
if (sdata)
obj = ((struct Section *)sdata->sections.first)->obj;
else
obj = (struct ObjectUnit *)gv->selobjects.first;
if (obj == NULL)
ierror("No object unit for ddrelocs section");
s = create_section(obj,ddrelocs_name,NULL,0);
s->type = ST_DATA;
s->flags = SF_ALLOC;
s->protection = SP_READ;
s->alignment = 2;
s->id = ~0;
ls = create_lnksect(gv,s->name,s->type,s->flags,s->protection,
s->alignment,0);
addtail(&ls->sections,&s->n);
s->lnksec = ls;
s->size = ls->size = 1; /* protect from deletion */
return s;
}
static int amiga_targetlink(struct GlobalVars *gv,struct LinkedSection *ls,
struct Section *s)
/* returns 1, if target requires the combination of the two sections, */
/* returns -1, if target doesn't want to combine them, */
/* returns 0, if target doesn't care - standard linking rules are used. */
{
if (!gv->use_ldscript) {
if ((!strncmp(ls->name,sdata_name,6) && !strncmp(s->name,sbss_name,5)
&& *(ls->name+6) == *(s->name+5)) ||
(!strncmp(ls->name,sbss_name,5) && !strncmp(s->name,sdata_name,6)
&& *(ls->name+5) == *(s->name+6)))
/* .sdata/.sbss, .sdata2/.sbss2, etc. are always combined */
return (1);
}
return elf_targetlink(gv,ls,s);
}
static struct Symbol *amiga_lnksym(struct GlobalVars *gv,
struct Section *sec,
struct Reloc *xref)
{
struct Symbol *sym;
if (!gv->dest_object && !gv->use_ldscript) {
if (!strcmp(linkerdb,xref->xrefname)) { /* _LinkerDB */
sym = addlnksymbol(gv,linkerdb,(lword)fff[gv->dest_format]->baseoff,
SYM_RELOC,SYMF_LNKSYM,SYMI_OBJECT,SYMB_GLOBAL,0);
sym->extra = SYMX_SPECIAL|LINKERDB;
if (findlnksymbol(gv,sdabase_name) == NULL) {
/* Reference to _LinkerDB creates _SDA_BASE_ */
struct Symbol *sdabase = addlnksymbol(gv,sdabase_name,
(lword)fff[gv->dest_format]->baseoff,
SYM_ABS,SYMF_LNKSYM,
SYMI_OBJECT,SYMB_GLOBAL,0);
sdabase->type = SYM_RELOC;
sdabase->extra = SDABASE;
}
if (findlnksymbol(gv,r13init_name) == NULL) {
/* Reference to _LinkerDB creates __r13_init */
struct Symbol *r13init = addlnksymbol(gv,r13init_name,
(lword)fff[gv->dest_format]->baseoff,
SYM_ABS,SYMF_LNKSYM,
SYMI_OBJECT,SYMB_GLOBAL,0);
r13init->type = SYM_RELOC;
r13init->extra = SYMX_SPECIAL|R13INIT;
}
return sym; /* new linker symbol created */
}
else if (!strcmp(r13init_name,xref->xrefname)) { /* __r13_init */
sym = addlnksymbol(gv,r13init_name,(lword)fff[gv->dest_format]->baseoff,
SYM_RELOC,SYMF_LNKSYM,SYMI_OBJECT,SYMB_GLOBAL,0);
sym->extra = SYMX_SPECIAL|R13INIT;
return sym; /* new linker symbol created */
}
else if (!strcmp(sdatasize,xref->xrefname)) { /* __sdata_size */
sym = addlnksymbol(gv,sdatasize,0,
SYM_ABS,SYMF_LNKSYM,SYMI_OBJECT,SYMB_GLOBAL,0);
sym->extra = SYMX_SPECIAL|SDATASIZE;
return sym; /* new linker symbol created */
}
else if (!strcmp(sbsssize,xref->xrefname)) { /* __sbss_size */
sym = addlnksymbol(gv,sbsssize,0,
SYM_ABS,SYMF_LNKSYM,SYMI_OBJECT,SYMB_GLOBAL,0);
sym->extra = SYMX_SPECIAL|SBSSSIZE;
return sym; /* new linker symbol created */
}
else if (!strcmp(ddrelocs,xref->xrefname)) { /* __datadata_relocs */
sym = addlnksymbol(gv,ddrelocs,0,
SYM_RELOC,SYMF_LNKSYM,SYMI_OBJECT,SYMB_GLOBAL,0);
sym->extra = SYMX_SPECIAL|DDRELOCS;
return sym; /* new linker symbol created */
}
else if (!strcmp(textsize,xref->xrefname)) { /* __text_size */
sym = addlnksymbol(gv,textsize,0,
SYM_ABS,SYMF_LNKSYM,SYMI_OBJECT,SYMB_GLOBAL,0);
sym->extra = SYMX_SPECIAL|TEXTSIZE;
return sym; /* new linker symbol created */
}
}
return elf_lnksym(gv,sec,xref);
}
static void amiga_setlnksym(struct GlobalVars *gv,struct Symbol *xdef)
{
if ((xdef->flags & SYMF_LNKSYM) && (xdef->extra & SYMX_SPECIAL)) {
struct LinkedSection *ls;
switch (xdef->extra & ~SYMX_SPECIAL) {
case LINKERDB:
case R13INIT:
ls = smalldata_section(gv);
xdef->relsect = (struct Section *)ls->sections.first;
break;
case SDATASIZE:
if (ls = find_lnksec(gv,sdata_name,0,0,0,0))
xdef->value = (lword)ls->size;
break;
case SBSSSIZE:
if (ls = find_lnksec(gv,sbss_name,0,0,0,0))
xdef->value = (lword)ls->size;
break;
case DDRELOCS:
xdef->relsect = ddrelocs_sec(gv,find_lnksec(gv,sdata_name,0,0,0,0));
break;
case TEXTSIZE:
if (ls = find_lnksec(gv,text_name,0,0,0,0))
xdef->value = (lword)ls->size;
break;
}
xdef->flags &= ~SYMF_LNKSYM; /* do not init again */
}
else
elf_setlnksym(gv,xdef);
}
#endif /* ELF32_AMIGA */
/*****************************************************************/
/* Write ELF */
/*****************************************************************/
#define FSTD 1 /* standard field, 16 or 32 bits */
#define FLO 2 /* @l lower 16 bits */
#define FHI 3 /* @h higher 16 bits */
#define FHA 4 /* @ha higher 16 bits for add, including carry */
#define FB24 5 /* low24 field, b and bl branches */
#define FB14 6 /* low14 field, 16-bit conditional branches */
#define FW30 7 /* 30-bit word */
static uint8_t ppc32_reloc_vlink2elf(struct Reloc *r)
/* Try to map vlink-internal representation to a valid ELF reloc type */
{
lword m32 = 0xffffffff;
struct RelocInsert *ri;
uint8_t rt = R_NONE;
if (ri = r->insert) {
int pos = (int)ri->bpos;
int size = (int)ri->bsiz;
lword mask = ri->mask;
struct RelocInsert *ri2 = ri->next;
int f = 0; /* field type */
r->offset += (unsigned long)pos >> 3;
pos &= 7;
ri->bpos = (uint16_t)pos;
if (pos==0 && (size==16 || size==32) && mask==-1 && ri2==NULL) {
f = FSTD;
}
else if (pos==6 && size==24 && (mask&0x3ffffff)==0x3fffffc && ri2==NULL) {
f = FB24;
}
else if (pos==0 && size==16 && (mask&m32)==0xffff && ri2==NULL) {
f = FLO;
}
else if (pos==0 && size==16 && (mask&m32)==0xffff0000 && ri2==NULL) {
f = FHI;
}
else if (pos==0 && size==16 && (mask&m32)==0xffff0000 && ri2!=NULL) {
if (ri2->bpos==0 && ri2->bsiz==16 &&
(ri2->mask&m32)==0x8000 && ri2->next==NULL)
f = FHA;
}
else if (pos==0 && size==14 && (mask&0xffff)==0xfffc && ri2==NULL) {
f = FB14;
r->offset -= 2;
ri->bpos += 16;
}
else if (pos==0 && size==30 && ri2==NULL) {
f = FW30;
}
else
f = 0; /* no usable insert-field description found */
switch (r->rtype) {
case R_ABS:
switch (f) {
case FSTD: rt = size==32 ? R_PPC_ADDR32 : R_PPC_ADDR16; break;
case FLO: rt = R_PPC_ADDR16_LO; break;
case FHI: rt = R_PPC_ADDR16_HI; break;
case FHA: rt = R_PPC_ADDR16_HA; break;
case FB24: rt = R_PPC_ADDR24; break;
case FB14: rt = R_PPC_ADDR14; break;
case FW30: rt = R_PPC_ADDR30; break;
}
break;
case R_PC:
switch (f) {
case FSTD:
if (size == 32) {
rt = R_PPC_REL32;
}
else if ((r->addend & 3) == 0) {
r->offset -= 2;
ri->bpos += 16;
rt = R_PPC_REL14;
}
break;
case FB24: rt = R_PPC_REL24; break;
case FB14: rt = R_PPC_REL14; break; /* @@@ BRTAKEN/BRNTAKEN */
}
break;
case R_GOT:
switch (f) {
case FSTD:
if (size == 16)
rt = R_PPC_GOT16;
break;
case FLO: rt = R_PPC_GOT16_LO; break;
case FHI: rt = R_PPC_GOT16_HI; break;
case FHA: rt = R_PPC_GOT16_HA; break;
}
break;
case R_PLT:
switch (f) {
case FSTD:
if (size == 32)
rt = R_PPC_PLT32;
break;
case FLO: rt = R_PPC_PLT16_LO; break;
case FHI: rt = R_PPC_PLT16_HI; break;
case FHA: rt = R_PPC_PLT16_HA; break;
}
break;
case R_PLTPC:
switch (f) {
case FSTD:
if (size == 32)
rt = R_PPC_PLTREL32;
break;
case FB24: rt = R_PPC_PLTREL24; break;
}
break;
case R_SECOFF:
switch (f) {
case FSTD:
if (size == 16)
rt = R_PPC_SECTOFF;
break;
case FLO: rt = R_PPC_SECTOFF_LO; break;
case FHI: rt = R_PPC_SECTOFF_HI; break;
case FHA: rt = R_PPC_SECTOFF_HA; break;
}
break;
case R_COPY:
rt = R_PPC_COPY;
break;
case R_GLOBDAT:
rt = R_PPC_GLOB_DAT;
break;
case R_JMPSLOT:
rt = R_PPC_JMP_SLOT;
break;
case R_LOADREL:
rt = R_PPC_RELATIVE;
break;
case R_LOCALPC:
if (f == FB24)
rt = R_PPC_LOCAL24PC;
break;
case R_SD:
if (f==FSTD && size==16)
rt = R_PPC_SDAREL16;
break;
case R_UABS:
rt = size==32 ? R_PPC_UADDR32 : R_PPC_UADDR16;
break;
/* Embedded and OS-specific relocs */
case R_SD2:
if (f==FSTD && size==16)
rt = R_PPC_EMB_SDA2REL;
break;
case R_SD21:
if (f==FSTD && size==16) {
r->offset -= 2;
ri->bpos += 16;
rt = R_PPC_EMB_SDA21;
}
break;
case R_MOSDREL:
switch (f) {
case FSTD:
if (size == 16)
rt = R_PPC_MORPHOS_DREL;
break;
case FLO: rt = R_PPC_MORPHOS_DREL_LO; break;
case FHI: rt = R_PPC_MORPHOS_DREL_HI; break;
case FHA: rt = R_PPC_MORPHOS_DREL_HA; break;
}
break;
case R_AOSBREL:
switch (f) {
case FSTD:
if (size == 16)
rt = R_PPC_AMIGAOS_BREL;
break;
case FLO: rt = R_PPC_AMIGAOS_BREL_LO; break;
case FHI: rt = R_PPC_AMIGAOS_BREL_HI; break;
case FHA: rt = R_PPC_AMIGAOS_BREL_HA; break;
}
break;
}
}
return rt;
}
static void init_got(struct GlobalVars *gv)
/* initialize target-specific .got contents */
{
struct LinkedSection *got,*dyn;
if (got = find_lnksec(gv,got_name,0,0,0,0)) {
write32be(got->data,0x4e800021); /* 0: blrl */
if (dyn = find_lnksec(gv,dyn_name,0,0,0,0))
write32be(got->data+4,(uint32_t)dyn->base); /* 4: .dynamic address */
}
}
#ifdef ELF32_PPC_BE
static void ppc32be_writeshared(struct GlobalVars *gv,FILE *f)
/* creates a target-elfppc32be shared object (which is pos. independent) */
{
init_got(gv);
elf32_writeexec(gv,f,EM_PPC,_BIG_ENDIAN_,ppc32_reloc_vlink2elf);
}
static void ppc32be_writeobject(struct GlobalVars *gv,FILE *f)
/* creates a target-elfppc32be relocatable object file */
{
elf32_writeobject(gv,f,EM_PPC,_BIG_ENDIAN_,ppc32_reloc_vlink2elf);
}
static void ppc32be_writeexec(struct GlobalVars *gv,FILE *f)
/* creates a target-elfppc32be executable file (with absolute addresses) */
{
init_got(gv);
elf32_writeexec(gv,f,EM_PPC,_BIG_ENDIAN_,ppc32_reloc_vlink2elf);
}
#endif /* ELF32_PPC_BE */
#ifdef ELF32_AMIGA
static void make_ddrelocs(struct GlobalVars *gv,struct LinkedSection *ddrel)
{
struct LinkedSection *sdata;
struct Section *sec;
struct Reloc *rel;
uint8_t *table;
uint32_t *p;
unsigned long size;
uint32_t nrelocs = 0;
if (sdata = find_lnksec(gv,sdata_name,0,0,0,0)) {
for (rel=(struct Reloc *)sdata->relocs.first;
rel->n.next!=NULL; rel=(struct Reloc *)rel->n.next) {
if (rel->relocsect.lnk==sdata && rel->rtype==R_ABS)
nrelocs++;
}
}
size = (nrelocs+1) * sizeof(uint32_t);
table = alloc(size);
p = (uint32_t *)table;
write32be(p++,nrelocs);
if (sdata) {
for (rel=(struct Reloc *)sdata->relocs.first;
rel->n.next!=NULL; rel=(struct Reloc *)rel->n.next) {
if (rel->relocsect.lnk==sdata && rel->rtype==R_ABS)
write32be(p++,(uint32_t)rel->offset);
}
}
ddrel->data = table;
ddrel->size = ddrel->filesize = size;
if (sec = (struct Section *)ddrel->sections.first) {
sec->data = table;
sec->size = size;
}
}
static void amiga_writeshared(struct GlobalVars *gv,FILE *f)
/* creates a target-elf32powerup/morphos shared object (which is pos.
independent) */
{
ierror("amiga_writeshared(): Shared object generation has not "
"yet been implemented");
}
static void amiga_writeobject(struct GlobalVars *gv,FILE *f)
/* creates a target-elf32powerup/morphos relocatable object file */
{
elf32_writeobject(gv,f,EM_PPC,_BIG_ENDIAN_,ppc32_reloc_vlink2elf);
}
static void amiga_writeexec(struct GlobalVars *gv,FILE *f)
/* creates a target-elf32powerup executable file, which in */
/* reality is a relocatable object too, but all symbol references have */
/* been resolved */
{
struct LinkedSection *ls;
if (gv->collect_ctors_type == CCDT_VBCC_ELF) {
static const char ctname[] = ".vbcc_ctors";
static const char dtname[] = ".vbcc_dtors";
/* rename .ctors and .dtors,
otherwise the PowerUp ELF loader will rearrange the pointers */
if (ls = find_lnksec(gv,ctors_name,0,0,0,0))
ls->name = ctname;
if (ls = find_lnksec(gv,dtors_name,0,0,0,0))
ls->name = dtname;
}
for (ls=(struct LinkedSection *)gv->lnksec.first; ls->n.next!=NULL;
ls=(struct LinkedSection *)ls->n.next) {
/* set filesize to memsize for all sections */
if (!(ls->flags & SF_UNINITIALIZED))
ls->filesize = ls->size;
/* setup ddrelocs section, if present */
if (!strcmp(ls->name,ddrelocs_name))
make_ddrelocs(gv,ls);
}
elf32_writeobject(gv,f,EM_PPC,_BIG_ENDIAN_,ppc32_reloc_vlink2elf);
}
static void morphos_writeexec(struct GlobalVars *gv,FILE *f)
/* creates a target-elf32morphos executable file, which in */
/* reality is a relocatable object too, but all symbol references have */
/* been resolved */
{
struct LinkedSection *ls;
int sdflag=0,sbflag=0;
for (ls=(struct LinkedSection *)gv->lnksec.first; ls->n.next!=NULL;
ls=(struct LinkedSection *)ls->n.next) {
if (ls->flags & SF_SMALLDATA) {
/* data sections should be called .sdata, and bss sections .sbss */
if (ls->type == ST_DATA) { /* .sdata */
struct Section *bss_sec = find_first_bss_sec(ls);
if (sdflag)
error(124,fff[gv->dest_format]->tname);
sdflag = 1;
ls->name = sdata_name;
if (bss_sec && (ls->filesize < ls->size)) {
/* put bss-part of .sdata into an own section called .sbss */
struct LinkedSection *sbss;
struct Section *sec = bss_sec;
struct Section *nextsec;
struct Symbol *sym = (struct Symbol *)ls->symbols.first;
struct Symbol *nextsym;
unsigned long bss_offset = bss_sec->offset;
lword bss_va = (lword)(ls->base + bss_offset);
sbss = create_lnksect(gv,sbss_name,ST_UDATA,
ls->flags|SF_UNINITIALIZED,
ls->protection,ls->alignment,ls->memattr);
sbss->size = ls->size - bss_sec->offset;
sbss->data = alloc(sbss->size);
/* move bss sections from .sdata to .sbss */
while (nextsec = (struct Section *)sec->n.next) {
remnode(&sec->n);
addtail(&sbss->sections,&sec->n);
sec->lnksec = sbss;
sec->offset -= bss_offset;
sec = nextsec;
}
/* move symbols */
while (nextsym = (struct Symbol *)sym->n.next) {
/* move bss symbols to .sbss */
if (sym->relsect->lnksec == sbss) {
remnode(&sym->n);
addtail(&sbss->symbols,&sym->n);
sym->value -= bss_va;
}
sym = nextsym;
}
/* no relocs and no xrefs can occur in bss */
ls->size -= sbss->size; /* the bss part is gone */
}
}
else if (ls->type == ST_UDATA) {
if (sbflag)
error(124,fff[gv->dest_format]->tname);
sbflag = 1;
ls->name = sbss_name;
}
}
/* set filesize to memsize for all sections */
if (!(ls->flags & SF_UNINITIALIZED))
ls->filesize = ls->size;
/* setup ddrelocs section, if present */
if (!strcmp(ls->name,ddrelocs_name))
make_ddrelocs(gv,ls);
}
elf32_writeobject(gv,f,EM_PPC,_BIG_ENDIAN_,ppc32_reloc_vlink2elf);
}
#endif /* ELF32_AMIGA */