Mac OS X port (Pierre d'Herbemont)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@999 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
933dc6ebc4
commit
82eec0a174
553
dyngen.c
553
dyngen.c
@ -6,6 +6,8 @@
|
||||
* The COFF object format support was extracted from Kazu's QEMU port
|
||||
* to Win32.
|
||||
*
|
||||
* Mach-O Support by Matt Reda and Pierre d'Herbemont
|
||||
*
|
||||
* 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
|
||||
@ -34,6 +36,8 @@
|
||||
compilation */
|
||||
#if defined(CONFIG_WIN32)
|
||||
#define CONFIG_FORMAT_COFF
|
||||
#elif defined(CONFIG_DARWIN)
|
||||
#define CONFIG_FORMAT_MACH
|
||||
#else
|
||||
#define CONFIG_FORMAT_ELF
|
||||
#endif
|
||||
@ -169,6 +173,35 @@ typedef struct coff_rel {
|
||||
|
||||
#endif /* CONFIG_FORMAT_COFF */
|
||||
|
||||
#ifdef CONFIG_FORMAT_MACH
|
||||
|
||||
#include <mach-o/loader.h>
|
||||
#include <mach-o/nlist.h>
|
||||
#include <mach-o/reloc.h>
|
||||
#include <mach-o/ppc/reloc.h>
|
||||
|
||||
# define check_mach_header(x) (x.magic == MH_MAGIC)
|
||||
typedef int32_t host_long;
|
||||
typedef uint32_t host_ulong;
|
||||
|
||||
struct nlist_extended
|
||||
{
|
||||
union {
|
||||
char *n_name;
|
||||
long n_strx;
|
||||
} n_un;
|
||||
unsigned char n_type;
|
||||
unsigned char n_sect;
|
||||
short st_desc;
|
||||
unsigned long st_value;
|
||||
unsigned long st_size;
|
||||
};
|
||||
|
||||
#define EXE_RELOC struct relocation_info
|
||||
#define EXE_SYM struct nlist_extended
|
||||
|
||||
#endif /* CONFIG_FORMAT_MACH */
|
||||
|
||||
#include "bswap.h"
|
||||
|
||||
enum {
|
||||
@ -399,6 +432,11 @@ int find_reloc(int sh_index)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
||||
{
|
||||
return rel->r_offset;
|
||||
}
|
||||
|
||||
static char *get_rel_sym_name(EXE_RELOC *rel)
|
||||
{
|
||||
return strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
|
||||
@ -600,6 +638,11 @@ static char *get_rel_sym_name(EXE_RELOC *rel)
|
||||
return name;
|
||||
}
|
||||
|
||||
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
||||
{
|
||||
return rel->r_offset;
|
||||
}
|
||||
|
||||
struct external_scnhdr *find_coff_section(struct external_scnhdr *shdr, int shnum, const char *name)
|
||||
{
|
||||
int i;
|
||||
@ -758,6 +801,390 @@ int load_object(const char *filename)
|
||||
|
||||
#endif /* CONFIG_FORMAT_COFF */
|
||||
|
||||
#ifdef CONFIG_FORMAT_MACH
|
||||
|
||||
/* File Header */
|
||||
struct mach_header mach_hdr;
|
||||
|
||||
/* commands */
|
||||
struct segment_command *segment = 0;
|
||||
struct dysymtab_command *dysymtabcmd = 0;
|
||||
struct symtab_command *symtabcmd = 0;
|
||||
|
||||
/* section */
|
||||
struct section *section_hdr;
|
||||
struct section *text_sec_hdr;
|
||||
uint8_t **sdata;
|
||||
|
||||
/* relocs */
|
||||
struct relocation_info *relocs;
|
||||
|
||||
/* symbols */
|
||||
EXE_SYM *symtab;
|
||||
struct nlist *symtab_std;
|
||||
char *strtab;
|
||||
|
||||
/* indirect symbols */
|
||||
uint32_t *tocdylib;
|
||||
|
||||
/* Utility functions */
|
||||
|
||||
static inline char *find_str_by_index(int index)
|
||||
{
|
||||
return strtab+index;
|
||||
}
|
||||
|
||||
/* Used by dyngen common code */
|
||||
static char *get_sym_name(EXE_SYM *sym)
|
||||
{
|
||||
char *name = find_str_by_index(sym->n_un.n_strx);
|
||||
|
||||
if ( sym->n_type & N_STAB ) /* Debug symbols are ignored */
|
||||
return "debug";
|
||||
|
||||
if(!name)
|
||||
return name;
|
||||
if(name[0]=='_')
|
||||
return name + 1;
|
||||
else
|
||||
return name;
|
||||
}
|
||||
|
||||
/* find a section index given its segname, sectname */
|
||||
static int find_mach_sec_index(struct section *section_hdr, int shnum, const char *segname,
|
||||
const char *sectname)
|
||||
{
|
||||
int i;
|
||||
struct section *sec = section_hdr;
|
||||
|
||||
for(i = 0; i < shnum; i++, sec++) {
|
||||
if (!sec->segname || !sec->sectname)
|
||||
continue;
|
||||
if (!strcmp(sec->sectname, sectname) && !strcmp(sec->segname, segname))
|
||||
return i;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* find a section header given its segname, sectname */
|
||||
struct section *find_mach_sec_hdr(struct section *section_hdr, int shnum, const char *segname,
|
||||
const char *sectname)
|
||||
{
|
||||
int index = find_mach_sec_index(section_hdr, shnum, segname, sectname);
|
||||
if(index == -1)
|
||||
return NULL;
|
||||
return section_hdr+index;
|
||||
}
|
||||
|
||||
|
||||
static inline void fetch_next_pair_value(struct relocation_info * rel, unsigned int *value)
|
||||
{
|
||||
struct scattered_relocation_info * scarel;
|
||||
|
||||
if(R_SCATTERED & rel->r_address) {
|
||||
scarel = (struct scattered_relocation_info*)rel;
|
||||
if(scarel->r_type != PPC_RELOC_PAIR)
|
||||
error("fetch_next_pair_value: looking for a pair which was not found (1)");
|
||||
*value = scarel->r_value;
|
||||
} else {
|
||||
if(rel->r_type != PPC_RELOC_PAIR)
|
||||
error("fetch_next_pair_value: looking for a pair which was not found (2)");
|
||||
*value = rel->r_address;
|
||||
}
|
||||
}
|
||||
|
||||
/* find a sym name given its value, in a section number */
|
||||
static const char * find_sym_with_value_and_sec_number( int value, int sectnum, int * offset )
|
||||
{
|
||||
int i, ret = -1;
|
||||
|
||||
for( i = 0 ; i < nb_syms; i++ )
|
||||
{
|
||||
if( !(symtab[i].n_type & N_STAB) && (symtab[i].n_type & N_SECT) &&
|
||||
(symtab[i].n_sect == sectnum) && (symtab[i].st_value <= value) )
|
||||
{
|
||||
if( (ret<0) || (symtab[i].st_value >= symtab[ret].st_value) )
|
||||
ret = i;
|
||||
}
|
||||
}
|
||||
if( ret < 0 ) {
|
||||
*offset = 0;
|
||||
return 0;
|
||||
} else {
|
||||
*offset = value - symtab[ret].st_value;
|
||||
return get_sym_name(&symtab[ret]);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Find symbol name given a (virtual) address, and a section which is of type
|
||||
* S_NON_LAZY_SYMBOL_POINTERS or S_LAZY_SYMBOL_POINTERS or S_SYMBOL_STUBS
|
||||
*/
|
||||
static const char * find_reloc_name_in_sec_ptr(int address, struct section * sec_hdr)
|
||||
{
|
||||
unsigned int tocindex, symindex, size;
|
||||
const char *name = 0;
|
||||
|
||||
/* Sanity check */
|
||||
if(!( address >= sec_hdr->addr && address < (sec_hdr->addr + sec_hdr->size) ) )
|
||||
return (char*)0;
|
||||
|
||||
if( sec_hdr->flags & S_SYMBOL_STUBS ){
|
||||
size = sec_hdr->reserved2;
|
||||
if(size == 0)
|
||||
error("size = 0");
|
||||
|
||||
}
|
||||
else if( sec_hdr->flags & S_LAZY_SYMBOL_POINTERS ||
|
||||
sec_hdr->flags & S_NON_LAZY_SYMBOL_POINTERS)
|
||||
size = sizeof(unsigned long);
|
||||
else
|
||||
return 0;
|
||||
|
||||
/* Compute our index in toc */
|
||||
tocindex = (address - sec_hdr->addr)/size;
|
||||
symindex = tocdylib[sec_hdr->reserved1 + tocindex];
|
||||
|
||||
name = get_sym_name(&symtab[symindex]);
|
||||
|
||||
return name;
|
||||
}
|
||||
|
||||
static const char * find_reloc_name_given_its_address(int address)
|
||||
{
|
||||
unsigned int i;
|
||||
for(i = 0; i < segment->nsects ; i++)
|
||||
{
|
||||
const char * name = find_reloc_name_in_sec_ptr(address, §ion_hdr[i]);
|
||||
if((long)name != -1)
|
||||
return name;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const char * get_reloc_name(EXE_RELOC * rel, int * sslide)
|
||||
{
|
||||
char * name = 0;
|
||||
struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
|
||||
int sectnum = rel->r_symbolnum;
|
||||
int sectoffset;
|
||||
int other_half=0;
|
||||
|
||||
/* init the slide value */
|
||||
*sslide = 0;
|
||||
|
||||
if(R_SCATTERED & rel->r_address)
|
||||
return (char *)find_reloc_name_given_its_address(sca_rel->r_value);
|
||||
|
||||
if(rel->r_extern)
|
||||
{
|
||||
/* ignore debug sym */
|
||||
if ( symtab[rel->r_symbolnum].n_type & N_STAB )
|
||||
return 0;
|
||||
return get_sym_name(&symtab[rel->r_symbolnum]);
|
||||
}
|
||||
|
||||
/* Intruction contains an offset to the symbols pointed to, in the rel->r_symbolnum section */
|
||||
sectoffset = *(uint32_t *)(text + rel->r_address) & 0xffff;
|
||||
|
||||
if(sectnum==0xffffff)
|
||||
return 0;
|
||||
|
||||
/* Sanity Check */
|
||||
if(sectnum > segment->nsects)
|
||||
error("sectnum > segment->nsects");
|
||||
|
||||
switch(rel->r_type)
|
||||
{
|
||||
case PPC_RELOC_LO16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (sectoffset & 0xffff);
|
||||
break;
|
||||
case PPC_RELOC_HI16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (other_half & 0xffff);
|
||||
break;
|
||||
case PPC_RELOC_HA16: fetch_next_pair_value(rel+1, &other_half); sectoffset = (other_half & 0xffff);
|
||||
break;
|
||||
case PPC_RELOC_BR24:
|
||||
sectoffset = ( *(uint32_t *)(text + rel->r_address) & 0x03fffffc );
|
||||
if (sectoffset & 0x02000000) sectoffset |= 0xfc000000;
|
||||
break;
|
||||
default:
|
||||
error("switch(rel->type) not found");
|
||||
}
|
||||
|
||||
if(rel->r_pcrel)
|
||||
sectoffset += rel->r_address;
|
||||
|
||||
if (rel->r_type == PPC_RELOC_BR24)
|
||||
name = (char *)find_reloc_name_in_sec_ptr((int)sectoffset, §ion_hdr[sectnum-1]);
|
||||
|
||||
/* search it in the full symbol list, if not found */
|
||||
if(!name)
|
||||
name = (char *)find_sym_with_value_and_sec_number(sectoffset, sectnum, sslide);
|
||||
|
||||
return name;
|
||||
}
|
||||
|
||||
/* Used by dyngen common code */
|
||||
static const char * get_rel_sym_name(EXE_RELOC * rel)
|
||||
{
|
||||
int sslide;
|
||||
return get_reloc_name( rel, &sslide);
|
||||
}
|
||||
|
||||
/* Used by dyngen common code */
|
||||
static host_ulong get_rel_offset(EXE_RELOC *rel)
|
||||
{
|
||||
struct scattered_relocation_info * sca_rel = (struct scattered_relocation_info*)rel;
|
||||
if(R_SCATTERED & rel->r_address)
|
||||
return sca_rel->r_address;
|
||||
else
|
||||
return rel->r_address;
|
||||
}
|
||||
|
||||
/* load a mach-o object file */
|
||||
int load_object(const char *filename)
|
||||
{
|
||||
int fd;
|
||||
unsigned int offset_to_segment = 0;
|
||||
unsigned int offset_to_dysymtab = 0;
|
||||
unsigned int offset_to_symtab = 0;
|
||||
struct load_command lc;
|
||||
unsigned int i, j;
|
||||
EXE_SYM *sym;
|
||||
struct nlist *syment;
|
||||
|
||||
fd = open(filename, O_RDONLY);
|
||||
if (fd < 0)
|
||||
error("can't open file '%s'", filename);
|
||||
|
||||
/* Read Mach header. */
|
||||
if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr))
|
||||
error("unable to read file header");
|
||||
|
||||
/* Check Mach identification. */
|
||||
if (!check_mach_header(mach_hdr)) {
|
||||
error("bad Mach header");
|
||||
}
|
||||
|
||||
if (mach_hdr.cputype != CPU_TYPE_POWERPC)
|
||||
error("Unsupported CPU");
|
||||
|
||||
if (mach_hdr.filetype != MH_OBJECT)
|
||||
error("Unsupported Mach Object");
|
||||
|
||||
/* read segment headers */
|
||||
for(i=0, j=sizeof(mach_hdr); i<mach_hdr.ncmds ; i++)
|
||||
{
|
||||
if(read(fd, &lc, sizeof(struct load_command)) != sizeof(struct load_command))
|
||||
error("unable to read load_command");
|
||||
if(lc.cmd == LC_SEGMENT)
|
||||
{
|
||||
offset_to_segment = j;
|
||||
lseek(fd, offset_to_segment, SEEK_SET);
|
||||
segment = malloc(sizeof(struct segment_command));
|
||||
if(read(fd, segment, sizeof(struct segment_command)) != sizeof(struct segment_command))
|
||||
error("unable to read LC_SEGMENT");
|
||||
}
|
||||
if(lc.cmd == LC_DYSYMTAB)
|
||||
{
|
||||
offset_to_dysymtab = j;
|
||||
lseek(fd, offset_to_dysymtab, SEEK_SET);
|
||||
dysymtabcmd = malloc(sizeof(struct dysymtab_command));
|
||||
if(read(fd, dysymtabcmd, sizeof(struct dysymtab_command)) != sizeof(struct dysymtab_command))
|
||||
error("unable to read LC_DYSYMTAB");
|
||||
}
|
||||
if(lc.cmd == LC_SYMTAB)
|
||||
{
|
||||
offset_to_symtab = j;
|
||||
lseek(fd, offset_to_symtab, SEEK_SET);
|
||||
symtabcmd = malloc(sizeof(struct symtab_command));
|
||||
if(read(fd, symtabcmd, sizeof(struct symtab_command)) != sizeof(struct symtab_command))
|
||||
error("unable to read LC_SYMTAB");
|
||||
}
|
||||
j+=lc.cmdsize;
|
||||
|
||||
lseek(fd, j, SEEK_SET);
|
||||
}
|
||||
|
||||
if(!segment)
|
||||
error("unable to find LC_SEGMENT");
|
||||
|
||||
/* read section headers */
|
||||
section_hdr = load_data(fd, offset_to_segment + sizeof(struct segment_command), segment->nsects * sizeof(struct section));
|
||||
|
||||
/* read all section data */
|
||||
sdata = (uint8_t **)malloc(sizeof(void *) * segment->nsects);
|
||||
memset(sdata, 0, sizeof(void *) * segment->nsects);
|
||||
|
||||
/* Load the data in section data */
|
||||
for(i = 0; i < segment->nsects; i++) {
|
||||
sdata[i] = load_data(fd, section_hdr[i].offset, section_hdr[i].size);
|
||||
}
|
||||
|
||||
/* text section */
|
||||
text_sec_hdr = find_mach_sec_hdr(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
|
||||
i = find_mach_sec_index(section_hdr, segment->nsects, SEG_TEXT, SECT_TEXT);
|
||||
if (i == -1 || !text_sec_hdr)
|
||||
error("could not find __TEXT,__text section");
|
||||
text = sdata[i];
|
||||
|
||||
/* Make sure dysym was loaded */
|
||||
if(!(int)dysymtabcmd)
|
||||
error("could not find __DYSYMTAB segment");
|
||||
|
||||
/* read the table of content of the indirect sym */
|
||||
tocdylib = load_data( fd, dysymtabcmd->indirectsymoff, dysymtabcmd->nindirectsyms * sizeof(uint32_t) );
|
||||
|
||||
/* Make sure symtab was loaded */
|
||||
if(!(int)symtabcmd)
|
||||
error("could not find __SYMTAB segment");
|
||||
nb_syms = symtabcmd->nsyms;
|
||||
|
||||
symtab_std = load_data(fd, symtabcmd->symoff, symtabcmd->nsyms * sizeof(struct nlist));
|
||||
strtab = load_data(fd, symtabcmd->stroff, symtabcmd->strsize);
|
||||
|
||||
symtab = malloc(sizeof(EXE_SYM) * nb_syms);
|
||||
|
||||
/* Now transform the symtab, to an extended version, with the sym size, and the C name */
|
||||
for(i = 0, sym = symtab, syment = symtab_std; i < nb_syms; i++, sym++, syment++) {
|
||||
const char *name;
|
||||
struct nlist *sym_follow, *sym_next = 0;
|
||||
unsigned int j;
|
||||
name = find_str_by_index(sym->n_un.n_strx);
|
||||
memset(sym, 0, sizeof(*sym));
|
||||
|
||||
if ( sym->n_type & N_STAB ) /* Debug symbols are skipped */
|
||||
continue;
|
||||
|
||||
memcpy(sym, syment, sizeof(*syment));
|
||||
|
||||
/* Find the following symbol in order to get the current symbol size */
|
||||
for(j = 0, sym_follow = symtab_std; j < nb_syms; j++, sym_follow++) {
|
||||
if ( sym_follow->n_sect != 1 || sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value))
|
||||
continue;
|
||||
if(!sym_next) {
|
||||
sym_next = sym_follow;
|
||||
continue;
|
||||
}
|
||||
if(!(sym_next->n_value > sym_follow->n_value))
|
||||
continue;
|
||||
sym_next = sym_follow;
|
||||
}
|
||||
if(sym_next)
|
||||
sym->st_size = sym_next->n_value - sym->st_value;
|
||||
else
|
||||
sym->st_size = text_sec_hdr->size - sym->st_value;
|
||||
}
|
||||
|
||||
/* Find Reloc */
|
||||
relocs = load_data(fd, text_sec_hdr->reloff, text_sec_hdr->nreloc * sizeof(struct relocation_info));
|
||||
nb_relocs = text_sec_hdr->nreloc;
|
||||
|
||||
close(fd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_FORMAT_MACH */
|
||||
|
||||
#ifdef HOST_ARM
|
||||
|
||||
int arm_emit_ldr_info(const char *name, unsigned long start_offset,
|
||||
@ -1049,9 +1476,12 @@ void gen_code(const char *name, host_ulong offset, host_ulong size,
|
||||
args_present[i] = 0;
|
||||
|
||||
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
||||
if (rel->r_offset >= start_offset &&
|
||||
rel->r_offset < start_offset + (p_end - p_start)) {
|
||||
host_ulong offset = get_rel_offset(rel);
|
||||
if (offset >= start_offset &&
|
||||
offset < start_offset + (p_end - p_start)) {
|
||||
sym_name = get_rel_sym_name(rel);
|
||||
if(!sym_name)
|
||||
continue;
|
||||
if (strstart(sym_name, "__op_param", &p)) {
|
||||
n = strtoul(p, NULL, 10);
|
||||
if (n > MAX_ARGS)
|
||||
@ -1087,9 +1517,12 @@ void gen_code(const char *name, host_ulong offset, host_ulong size,
|
||||
fprintf(outfile, " extern void %s();\n", name);
|
||||
|
||||
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
|
||||
if (rel->r_offset >= start_offset &&
|
||||
rel->r_offset < start_offset + (p_end - p_start)) {
|
||||
host_ulong offset = get_rel_offset(rel);
|
||||
if (offset >= start_offset &&
|
||||
offset < start_offset + (p_end - p_start)) {
|
||||
sym_name = get_rel_sym_name(rel);
|
||||
if(!sym_name)
|
||||
continue;
|
||||
if (*sym_name &&
|
||||
!strstart(sym_name, "__op_param", NULL) &&
|
||||
!strstart(sym_name, "__op_jmp", NULL)) {
|
||||
@ -1101,12 +1534,18 @@ void gen_code(const char *name, host_ulong offset, host_ulong size,
|
||||
continue;
|
||||
}
|
||||
#endif
|
||||
#ifdef __APPLE__
|
||||
/* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
|
||||
fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
|
||||
#else
|
||||
fprintf(outfile, "extern char %s;\n", sym_name);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size);
|
||||
fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n",
|
||||
name, (int)(start_offset - offset), copy_size);
|
||||
|
||||
/* emit code offset information */
|
||||
{
|
||||
@ -1131,12 +1570,19 @@ void gen_code(const char *name, host_ulong offset, host_ulong size,
|
||||
} else {
|
||||
ptr = NULL;
|
||||
}
|
||||
#elif defined(CONFIG_FORMAT_MACH)
|
||||
if(!sym->n_sect)
|
||||
continue;
|
||||
ptr = sdata[sym->n_sect-1];
|
||||
#else
|
||||
ptr = sdata[sym->st_shndx];
|
||||
#endif
|
||||
if (!ptr)
|
||||
error("__op_labelN in invalid section");
|
||||
offset = sym->st_value;
|
||||
#ifdef CONFIG_FORMAT_MACH
|
||||
offset -= section_hdr[sym->n_sect-1].addr;
|
||||
#endif
|
||||
val = *(unsigned long *)(ptr + offset);
|
||||
#ifdef ELF_USES_RELOCA
|
||||
{
|
||||
@ -1284,6 +1730,7 @@ void gen_code(const char *name, host_ulong offset, host_ulong size,
|
||||
}
|
||||
#elif defined(HOST_PPC)
|
||||
{
|
||||
#ifdef CONFIG_FORMAT_ELF
|
||||
char name[256];
|
||||
int type;
|
||||
int addend;
|
||||
@ -1337,6 +1784,94 @@ void gen_code(const char *name, host_ulong offset, host_ulong size,
|
||||
}
|
||||
}
|
||||
}
|
||||
#elif defined(CONFIG_FORMAT_MACH)
|
||||
struct scattered_relocation_info *scarel;
|
||||
struct relocation_info * rel;
|
||||
char final_sym_name[256];
|
||||
const char *sym_name;
|
||||
const char *p;
|
||||
int slide, sslide;
|
||||
int i;
|
||||
|
||||
for(i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
|
||||
unsigned int offset, length, value = 0;
|
||||
unsigned int type, pcrel, isym = 0;
|
||||
unsigned int usesym = 0;
|
||||
|
||||
if(R_SCATTERED & rel->r_address) {
|
||||
scarel = (struct scattered_relocation_info*)rel;
|
||||
offset = (unsigned int)scarel->r_address;
|
||||
length = scarel->r_length;
|
||||
pcrel = scarel->r_pcrel;
|
||||
type = scarel->r_type;
|
||||
value = scarel->r_value;
|
||||
} else {
|
||||
value = isym = rel->r_symbolnum;
|
||||
usesym = (rel->r_extern);
|
||||
offset = rel->r_address;
|
||||
length = rel->r_length;
|
||||
pcrel = rel->r_pcrel;
|
||||
type = rel->r_type;
|
||||
}
|
||||
|
||||
slide = offset - start_offset;
|
||||
|
||||
if (!(offset >= start_offset && offset < start_offset + size))
|
||||
continue; /* not in our range */
|
||||
|
||||
sym_name = get_reloc_name(rel, &sslide);
|
||||
|
||||
if(usesym && symtab[isym].n_type & N_STAB)
|
||||
continue; /* don't handle STAB (debug sym) */
|
||||
|
||||
if (sym_name && strstart(sym_name, "__op_jmp", &p)) {
|
||||
int n;
|
||||
n = strtol(p, NULL, 10);
|
||||
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
|
||||
n, slide);
|
||||
continue; /* Nothing more to do */
|
||||
}
|
||||
|
||||
if(!sym_name)
|
||||
{
|
||||
fprintf(outfile, "/* #warning relocation not handled in %s (value 0x%x, %s, offset 0x%x, length 0x%x, %s, type 0x%x) */\n",
|
||||
name, value, usesym ? "use sym" : "don't use sym", offset, length, pcrel ? "pcrel":"", type);
|
||||
continue; /* dunno how to handle without final_sym_name */
|
||||
}
|
||||
|
||||
if (strstart(sym_name, "__op_param", &p)) {
|
||||
snprintf(final_sym_name, sizeof(final_sym_name), "param%s", p);
|
||||
} else {
|
||||
snprintf(final_sym_name, sizeof(final_sym_name), "(long)(&%s)", sym_name);
|
||||
}
|
||||
|
||||
switch(type) {
|
||||
case PPC_RELOC_BR24:
|
||||
fprintf(outfile, "{\n");
|
||||
fprintf(outfile, " uint32_t imm = *(uint32_t *)(gen_code_ptr + %d) & 0x3fffffc;\n", slide);
|
||||
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((imm + ((long)%s - (long)gen_code_ptr) + %d) & 0x03fffffc);\n",
|
||||
slide, slide, name, sslide );
|
||||
fprintf(outfile, "}\n");
|
||||
break;
|
||||
case PPC_RELOC_HI16:
|
||||
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d) >> 16;\n",
|
||||
slide, final_sym_name, sslide);
|
||||
break;
|
||||
case PPC_RELOC_LO16:
|
||||
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d);\n",
|
||||
slide, final_sym_name, sslide);
|
||||
break;
|
||||
case PPC_RELOC_HA16:
|
||||
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d + 2) = (%s + %d + 0x8000) >> 16;\n",
|
||||
slide, final_sym_name, sslide);
|
||||
break;
|
||||
default:
|
||||
error("unsupported powerpc relocation (%d)", type);
|
||||
}
|
||||
}
|
||||
#else
|
||||
#error unsupport object format
|
||||
#endif
|
||||
}
|
||||
#elif defined(HOST_S390)
|
||||
{
|
||||
@ -1689,9 +2224,9 @@ int gen_file(FILE *outfile, int out_type)
|
||||
fprintf(outfile, "DEF(nop2, 2, 0)\n");
|
||||
fprintf(outfile, "DEF(nop3, 3, 0)\n");
|
||||
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
|
||||
const char *name, *p;
|
||||
const char *name;
|
||||
name = get_sym_name(sym);
|
||||
if (strstart(name, OP_PREFIX, &p)) {
|
||||
if (strstart(name, OP_PREFIX, NULL)) {
|
||||
gen_code(name, sym->st_value, sym->st_size, outfile, 2);
|
||||
}
|
||||
}
|
||||
@ -1702,8 +2237,10 @@ int gen_file(FILE *outfile, int out_type)
|
||||
const char *name;
|
||||
name = get_sym_name(sym);
|
||||
if (strstart(name, OP_PREFIX, NULL)) {
|
||||
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
||||
if (sym->st_shndx != text_shndx)
|
||||
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
||||
#endif
|
||||
gen_code(name, sym->st_value, sym->st_size, outfile, 0);
|
||||
}
|
||||
}
|
||||
@ -1747,8 +2284,10 @@ fprintf(outfile,
|
||||
printf("%4d: %s pos=0x%08x len=%d\n",
|
||||
i, name, sym->st_value, sym->st_size);
|
||||
#endif
|
||||
#if defined(CONFIG_FORMAT_ELF) || defined(CONFIG_FORMAT_COFF)
|
||||
if (sym->st_shndx != text_shndx)
|
||||
error("invalid section for opcode (0x%x)", sym->st_shndx);
|
||||
#endif
|
||||
gen_code(name, sym->st_value, sym->st_size, outfile, 1);
|
||||
}
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user