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-rw-r--r--ldso/ldso/powerpc/elfinterp.c419
1 files changed, 178 insertions, 241 deletions
diff --git a/ldso/ldso/powerpc/elfinterp.c b/ldso/ldso/powerpc/elfinterp.c
index 0aaf8f1ab..5d731e455 100644
--- a/ldso/ldso/powerpc/elfinterp.c
+++ b/ldso/ldso/powerpc/elfinterp.c
@@ -106,20 +106,20 @@ extern int _dl_linux_resolve(void);
void _dl_init_got(unsigned long *plt,struct elf_resolve *tpnt)
{
- unsigned long target_addr = (unsigned long)_dl_linux_resolve;
- unsigned int n_plt_entries;
- unsigned long *tramp;
- unsigned long data_words;
- unsigned int rel_offset_words;
+ Elf32_Word *tramp;
+ Elf32_Word num_plt_entries;
+ Elf32_Word data_words;
+ Elf32_Word rel_offset_words;
+ Elf32_Word dlrr = (Elf32_Word) _dl_linux_resolve;
//DPRINTF("init_got plt=%x, tpnt=%x\n", (unsigned long)plt,(unsigned long)tpnt);
- n_plt_entries = tpnt->dynamic_info[DT_PLTRELSZ] / sizeof(ELF_RELOC);
+ num_plt_entries = tpnt->dynamic_info[DT_PLTRELSZ] / sizeof(ELF_RELOC);
//DPRINTF("n_plt_entries %d\n",n_plt_entries);
- rel_offset_words = PLT_DATA_START_WORDS(n_plt_entries);
+ rel_offset_words = PLT_DATA_START_WORDS(num_plt_entries);
//DPRINTF("rel_offset_words %x\n",rel_offset_words);
- data_words = (unsigned long)(plt + rel_offset_words);
+ data_words = (Elf32_Word) (plt + rel_offset_words);
//DPRINTF("data_words %x\n",data_words);
tpnt->data_words = data_words;
@@ -132,23 +132,38 @@ void _dl_init_got(unsigned long *plt,struct elf_resolve *tpnt)
/* [4] */
/* [5] */
+ tramp = (Elf32_Word *) (plt + PLT_TRAMPOLINE_ENTRY_WORDS);
- tramp = plt + PLT_TRAMPOLINE_ENTRY_WORDS;
+ /* For the long entries, subtract off data_words. */
tramp[0] = OPCODE_ADDIS_HI(11,11,-data_words);
tramp[1] = OPCODE_ADDI(11,11,-data_words);
+
+ /* Multiply index of entry by 3 (in r11). */
tramp[2] = OPCODE_SLWI(12,11,1);
tramp[3] = OPCODE_ADD(11,12,11);
- tramp[4] = OPCODE_LI(12,target_addr);
- tramp[5] = OPCODE_ADDIS_HI(12,12,target_addr);
- tramp[6] = OPCODE_MTCTR(12);
- tramp[7] = OPCODE_LI(12,(unsigned long)tpnt);
- tramp[8] = OPCODE_ADDIS_HI(12,12,(unsigned long)tpnt);
- tramp[9] = OPCODE_BCTR();
-
+ if (dlrr <= 0x01fffffc || dlrr >= 0xfe000000) {
+ /* Load address of link map in r12. */
+ tramp[4] = OPCODE_LI (12, (Elf32_Word) tpnt);
+ tramp[5] = OPCODE_ADDIS_HI (12, 12, (Elf32_Word) tpnt);
+
+ /* Call _dl_runtime_resolve. */
+ tramp[6] = OPCODE_BA (dlrr);
+ } else {
+ /* Get address of _dl_runtime_resolve in CTR. */
+ tramp[4] = OPCODE_LI(12,dlrr);
+ tramp[5] = OPCODE_ADDIS_HI(12,12,dlrr);
+ tramp[6] = OPCODE_MTCTR(12);
+
+ /* Load address of link map in r12. */
+ tramp[7] = OPCODE_LI(12,(Elf32_Word) tpnt);
+ tramp[8] = OPCODE_ADDIS_HI(12,12,(Elf32_Word) tpnt);
+
+ /* Call _dl_runtime_resolve. */
+ tramp[9] = OPCODE_BCTR();
+ }
/* [16] unused */
/* [17] unused */
- /* instructions were modified */
PPC_DCBST(plt);
PPC_DCBST(plt+4);
PPC_DCBST(plt+8);
@@ -156,31 +171,25 @@ void _dl_init_got(unsigned long *plt,struct elf_resolve *tpnt)
PPC_DCBST(plt+16-1);
PPC_SYNC;
PPC_ICBI(plt);
- PPC_ICBI(plt+4); /* glibc thinks this is not needed */
- PPC_ICBI(plt+8); /* glibc thinks this is not needed */
- PPC_ICBI(plt+12); /* glibc thinks this is not needed */
PPC_ICBI(plt+16-1);
PPC_ISYNC;
}
unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry)
{
- int reloc_type;
ELF_RELOC *this_reloc;
char *strtab;
Elf32_Sym *symtab;
ELF_RELOC *rel_addr;
int symtab_index;
char *symname;
- unsigned long insn_addr;
- unsigned long *insns;
- unsigned long new_addr;
- unsigned long delta;
+ Elf32_Addr *reloc_addr;
+ Elf32_Addr finaladdr;
+ Elf32_Sword delta;
rel_addr = (ELF_RELOC *) (tpnt->dynamic_info[DT_JMPREL] + tpnt->loadaddr);
this_reloc = (void *)rel_addr + reloc_entry;
- reloc_type = ELF32_R_TYPE(this_reloc->r_info);
symtab_index = ELF32_R_SYM(this_reloc->r_info);
symtab = (Elf32_Sym *) (tpnt->dynamic_info[DT_SYMTAB] + tpnt->loadaddr);
@@ -190,80 +199,60 @@ unsigned long _dl_linux_resolver(struct elf_resolve *tpnt, int reloc_entry)
#if defined (__SUPPORT_LD_DEBUG__)
debug_sym(symtab,strtab,symtab_index);
debug_reloc(symtab,strtab,this_reloc);
-#endif
- if (reloc_type != R_PPC_JMP_SLOT) {
+ if (ELF32_R_TYPE(this_reloc->r_info) != R_PPC_JMP_SLOT) {
_dl_dprintf(2, "%s: Incorrect relocation type in jump relocation\n", _dl_progname);
_dl_exit(1);
};
+#endif
/* Address of dump instruction to fix up */
- insn_addr = (unsigned long) tpnt->loadaddr +
- (unsigned long) this_reloc->r_offset;
+ reloc_addr = (Elf32_Addr *) (tpnt->loadaddr + this_reloc->r_offset);
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
- _dl_dprintf(_dl_debug_file, "\n\tResolving symbol %s %x --> ", symname, insn_addr);
+ _dl_dprintf(_dl_debug_file, "\n\tResolving symbol %s %x --> ", symname, (Elf32_Addr)reloc_addr);
#endif
/* Get the address of the GOT entry */
- new_addr = (unsigned long) _dl_find_hash(
- strtab + symtab[symtab_index].st_name,
- tpnt->symbol_scope, tpnt, resolver);
- if (!new_addr) {
- _dl_dprintf(2, "%s: can't resolve symbol '%s'\n",
- _dl_progname, symname);
+ finaladdr = (Elf32_Addr) _dl_find_hash(strtab + symtab[symtab_index].st_name,
+ tpnt->symbol_scope, tpnt, resolver);
+ if (!finaladdr) {
+ _dl_dprintf(2, "%s: can't resolve symbol '%s'\n", _dl_progname, symname);
_dl_exit(1);
};
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
- _dl_dprintf(_dl_debug_file, "%x\n", new_addr);
+ _dl_dprintf(_dl_debug_file, "%x\n", finaladdr);
#endif
-
- insns = (unsigned long *)insn_addr;
- delta = new_addr - insn_addr;
-
- if(delta<<6>>6 == delta){
- insns[0] = OPCODE_B(delta);
- }else if (new_addr <= 0x01fffffc || new_addr >= 0xfe000000){
- insns[0] = OPCODE_BA (new_addr);
- }else{
+ delta = finaladdr - (Elf32_Word)reloc_addr;
+ if (delta<<6>>6 == delta) {
+ *reloc_addr = OPCODE_B(delta);
+ } else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000) {
+ *reloc_addr = OPCODE_BA (finaladdr);
+ } else {
/* Warning: we don't handle double-sized PLT entries */
- unsigned long plt_addr;
- unsigned long *ptr;
- int index;
+ Elf32_Word *plt, *data_words, index, offset;
- plt_addr = (unsigned long)tpnt->dynamic_info[DT_PLTGOT] +
- (unsigned long)tpnt->loadaddr;
+ plt = (Elf32_Word *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr);
+ offset = reloc_addr - plt;
+ index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
+ data_words = (Elf32_Word *)tpnt->data_words;
+ reloc_addr += 1;
- delta = PLT_LONGBRANCH_ENTRY_WORDS*4 - (insn_addr-plt_addr+4);
-
- index = (insn_addr - plt_addr - PLT_INITIAL_ENTRY_WORDS*4)/8;
-
- ptr = (unsigned long *)tpnt->data_words;
- //DPRINTF("plt_addr=%x delta=%x index=%x ptr=%x\n", plt_addr, delta, index, ptr);
- insns += 1;
-
- ptr[index] = new_addr;
+ data_words[index] = finaladdr;
PPC_SYNC;
- /* icache sync is not necessary, since this will be a data load */
- //PPC_DCBST(ptr+index);
- //PPC_SYNC;
- //PPC_ICBI(ptr+index);
- //PPC_ISYNC;
-
- insns[0] = OPCODE_B(delta);
-
+ *reloc_addr = OPCODE_B ((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1)) * 4);
}
/* instructions were modified */
- PPC_DCBST(insns);
+ PPC_DCBST(reloc_addr);
PPC_SYNC;
- PPC_ICBI(insns);
+ PPC_ICBI(reloc_addr);
PPC_ISYNC;
- return new_addr;
+ return finaladdr;
}
static int
@@ -335,74 +324,39 @@ static int
_dl_do_lazy_reloc (struct elf_resolve *tpnt, struct dyn_elf *scope,
ELF_RELOC *rpnt, Elf32_Sym *symtab, char *strtab)
{
- int reloc_type;
- unsigned long reloc_addr;
-#if defined (__SUPPORT_LD_DEBUG__)
- unsigned long old_val;
-#endif
+ Elf32_Addr *reloc_addr;
+ Elf32_Word *plt, index, offset;
+
(void)scope;
(void)symtab;
(void)strtab;
- reloc_addr = (unsigned long)tpnt->loadaddr + (unsigned long) rpnt->r_offset;
- reloc_type = ELF32_R_TYPE(rpnt->r_info);
-
+ reloc_addr = (Elf32_Addr *)(tpnt->loadaddr + rpnt->r_offset);
#if defined (__SUPPORT_LD_DEBUG__)
- old_val = reloc_addr;
-#endif
-
- switch (reloc_type) {
- case R_PPC_NONE:
- return 0;
- break;
- case R_PPC_JMP_SLOT:
- {
- int index;
- unsigned long delta;
- unsigned long *plt;
- unsigned long *insns;
-
- plt = (unsigned long *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr);
-
- delta = (unsigned long)(plt+PLT_TRAMPOLINE_ENTRY_WORDS+2) - (reloc_addr+4);
-
- index = (reloc_addr - (unsigned long)(plt+PLT_INITIAL_ENTRY_WORDS))
- /sizeof(unsigned long);
- index /= 2;
- //DPRINTF(" index %x delta %x\n",index,delta);
- insns = (unsigned long *)reloc_addr;
- insns[0] = OPCODE_LI(11,index*4);
- insns[1] = OPCODE_B(delta);
- break;
- }
- default:
-#if 0
- _dl_dprintf(2, "%s: (LAZY) can't handle reloc type ",
- _dl_progname);
-#if defined (__SUPPORT_LD_DEBUG__)
- _dl_dprintf(2, "%s ", _dl_reltypes[reloc_type]);
-#endif
- if (symtab_index)
- _dl_dprintf(2, "'%s'\n", strtab + symtab[symtab_index].st_name);
+ if (ELF32_R_TYPE(rpnt->r_info) != R_PPC_JMP_SLOT) {
+ _dl_dprintf(2, "Reloc type != R_PPC_JMP_SLOT. Type is 0x%x\n", ELF32_R_TYPE(rpnt->r_info));
+ return -1;
+ }
#endif
- //_dl_exit(1);
- return -1;
- };
+ plt = (Elf32_Word *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr);
+ offset = reloc_addr - plt;
+ index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
+ reloc_addr[0] = OPCODE_LI(11,index*4);
+ reloc_addr[1] = OPCODE_B((PLT_TRAMPOLINE_ENTRY_WORDS + 2 - (offset+1)) * 4);
/* instructions were modified */
PPC_DCBST(reloc_addr);
- PPC_DCBST(reloc_addr+4);
+ PPC_DCBST(reloc_addr+1);
PPC_SYNC;
PPC_ICBI(reloc_addr);
- PPC_ICBI(reloc_addr+4);
+ PPC_ICBI(reloc_addr+1);
PPC_ISYNC;
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
- _dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x", old_val, reloc_addr);
+ _dl_dprintf(_dl_debug_file, "\tpatched: %x", reloc_addr);
#endif
return 0;
-
}
static int
@@ -412,147 +366,132 @@ _dl_do_reloc (struct elf_resolve *tpnt,struct dyn_elf *scope,
int reloc_type;
int symtab_index;
char *symname;
- unsigned long *reloc_addr;
+ Elf32_Addr *reloc_addr;
+ Elf32_Addr finaladdr;
+
unsigned long symbol_addr;
#if defined (__SUPPORT_LD_DEBUG__)
unsigned long old_val;
#endif
-
- reloc_addr = (unsigned long *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
+ reloc_addr = (Elf32_Addr *)(intptr_t) (tpnt->loadaddr + (unsigned long) rpnt->r_offset);
reloc_type = ELF32_R_TYPE(rpnt->r_info);
+ if (reloc_type == R_PPC_RELATIVE) {
+ *reloc_addr = tpnt->loadaddr + rpnt->r_addend;
+ return 0;
+ }
+ if (reloc_type == R_PPC_NONE || reloc_type == R_PPC_COPY) /* R_PPC_COPY is handled later */
+ return 0;
symtab_index = ELF32_R_SYM(rpnt->r_info);
- symbol_addr = 0;
symname = strtab + symtab[symtab_index].st_name;
- if (symtab_index) {
-
- symbol_addr = (unsigned long) _dl_find_hash(symname, scope,
- (reloc_type == R_PPC_JMP_SLOT ? tpnt : NULL), symbolrel);
-
- /*
- * We want to allow undefined references to weak symbols - this might
- * have been intentional. We should not be linking local symbols
- * here, so all bases should be covered.
- */
-
- if (!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) == STB_GLOBAL) {
+ symbol_addr = (unsigned long) _dl_find_hash(symname, scope,
+ (reloc_type == R_PPC_JMP_SLOT ? tpnt : NULL), symbolrel);
+ /*
+ * We want to allow undefined references to weak symbols - this might
+ * have been intentional. We should not be linking local symbols
+ * here, so all bases should be covered.
+ */
+ if (!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) == STB_GLOBAL) {
#if defined (__SUPPORT_LD_DEBUG__)
- _dl_dprintf(2, "\tglobal symbol '%s' already defined in '%s'\n",
- symname, tpnt->libname);
+ _dl_dprintf(2, "\tglobal symbol '%s' already defined in '%s', rel type: %s\n",
+ symname, tpnt->libname, _dl_reltypes(reloc_type));
#endif
- return 0;
- }
+ return 0;
}
-
#if defined (__SUPPORT_LD_DEBUG__)
old_val = *reloc_addr;
#endif
- switch (reloc_type) {
- case R_PPC_NONE:
- return 0;
- break;
- case R_PPC_REL24:
-#if 0
- {
- unsigned long delta = symbol_addr - (unsigned long)reloc_addr;
- if(delta<<6>>6 != delta){
- _dl_dprintf(2,"R_PPC_REL24: Reloc out of range\n");
- _dl_exit(1);
- }
- *reloc_addr &= 0xfc000003;
- *reloc_addr |= delta&0x03fffffc;
- }
- break;
-#else
- _dl_dprintf(2, "%s: symbol '%s' is type R_PPC_REL24\n\tCompile shared libraries with -fPIC!\n",
- _dl_progname, symname);
- _dl_exit(1);
-#endif
- case R_PPC_RELATIVE:
- *reloc_addr = (unsigned long)tpnt->loadaddr + (unsigned long)rpnt->r_addend;
- break;
- case R_PPC_ADDR32:
- case R_PPC_GLOB_DAT:
- *reloc_addr = symbol_addr + (unsigned long)rpnt->r_addend;
- break;
- case R_PPC_ADDR16_HA:
- /* XXX is this correct? */
- *(short *)reloc_addr += (symbol_addr+0x8000)>>16;
- break;
- case R_PPC_ADDR16_HI:
- *(short *)reloc_addr += symbol_addr>>16;
- break;
- case R_PPC_ADDR16_LO:
- *(short *)reloc_addr += symbol_addr;
- break;
- case R_PPC_JMP_SLOT:
- {
- unsigned long targ_addr = (unsigned long)*reloc_addr;
- unsigned long delta = targ_addr - (unsigned long)reloc_addr;
- if(delta<<6>>6 == delta){
- *reloc_addr = OPCODE_B(delta);
- }else if (targ_addr <= 0x01fffffc || targ_addr >= 0xfe000000){
- *reloc_addr = OPCODE_BA (targ_addr);
- }else{
- {
- int index;
- unsigned long delta2;
- unsigned long *plt, *ptr;
- plt = (unsigned long *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr);
-
- delta2 = (unsigned long)(plt+PLT_LONGBRANCH_ENTRY_WORDS)
- - (unsigned long)(reloc_addr+1);
-
- index = ((unsigned long)reloc_addr -
- (unsigned long)(plt+PLT_INITIAL_ENTRY_WORDS))
- /sizeof(unsigned long);
- index /= 2;
- //DPRINTF(" index %x delta %x\n",index,delta2);
- ptr = (unsigned long *)tpnt->data_words;
- ptr[index] = targ_addr;
- reloc_addr[0] = OPCODE_LI(11,index*4);
- reloc_addr[1] = OPCODE_B(delta2);
-
- /* instructions were modified */
- PPC_DCBST(reloc_addr+1);
- PPC_SYNC;
- PPC_ICBI(reloc_addr+1);
- }
- }
- break;
- }
- case R_PPC_COPY:
- // handled later
- return 0;
- break;
- default:
-#if 0
- _dl_dprintf(2, "%s: can't handle reloc type ", _dl_progname);
+ finaladdr = (Elf32_Addr) (symbol_addr + rpnt->r_addend);
+
+ switch (reloc_type) {
+ case R_PPC_ADDR32:
+ case R_PPC_GLOB_DAT:
+ *reloc_addr = finaladdr;
+ return 0; /* No code code modified */
+ break;
+ case R_PPC_JMP_SLOT:
+ {
+ Elf32_Sword delta = finaladdr - (Elf32_Word)reloc_addr;
+
+ if (delta<<6>>6 == delta) {
+ *reloc_addr = OPCODE_B(delta);
+ } else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000) {
+ *reloc_addr = OPCODE_BA (finaladdr);
+ } else {
+ /* Warning: we don't handle double-sized PLT entries */
+ Elf32_Word *plt, *data_words, index, offset;
+
+ plt = (Elf32_Word *)(tpnt->dynamic_info[DT_PLTGOT] + tpnt->loadaddr);
+ offset = reloc_addr - plt;
+ index = (offset - PLT_INITIAL_ENTRY_WORDS)/2;
+ data_words = (Elf32_Word *)tpnt->data_words;
+
+ data_words[index] = finaladdr;
+ reloc_addr[0] = OPCODE_LI(11,index*4);
+ reloc_addr[1] = OPCODE_B((PLT_LONGBRANCH_ENTRY_WORDS - (offset+1)) * 4);
+
+ /* instructions were modified */
+ PPC_DCBST(reloc_addr+1);
+ PPC_SYNC;
+ PPC_ICBI(reloc_addr+1);
+ }
+ break;
+ }
+ case R_PPC_COPY:
+ /* This does not work yet, R_PPC_COPY is handled later, see if statemet above */
+ if (symbol_addr) {
#if defined (__SUPPORT_LD_DEBUG__)
- _dl_dprintf(2, "%s ", _dl_reltypes[reloc_type]);
+ if(_dl_debug_move)
+ _dl_dprintf(_dl_debug_file,"\n%s move %x bytes from %x to %x",
+ symname, symtab[symtab_index].st_size,
+ symbol_addr, symtab[symtab_index].st_value);
#endif
- if (symtab_index)
- _dl_dprintf(2, "'%s'\n", strtab + symtab[symtab_index].st_name);
+ _dl_memcpy((char *) reloc_addr, (char *) finaladdr, symtab[symtab_index].st_size);
+ }
+ return 0; /* No code code modified */
+ break;
+ case R_PPC_ADDR16_HA:
+ *(short *)reloc_addr = (finaladdr + 0x8000)>>16;
+ break;
+ case R_PPC_ADDR16_HI:
+ *(short *)reloc_addr = finaladdr >> 16;
+ break;
+ case R_PPC_ADDR16_LO:
+ *(short *)reloc_addr = finaladdr;
+ break;
+ case R_PPC_REL24:
+ {
+ Elf32_Sword delta = finaladdr - (Elf32_Word)reloc_addr;
+ if(delta<<6>>6 != delta){
+ _dl_dprintf(2, "%s: symbol '%s' R_PPC_REL24 is out of range.\n\tCompile shared libraries with -fPIC!\n",
+ _dl_progname, symname);
+ _dl_exit(1);
+ }
+ *reloc_addr = (*reloc_addr & 0xfc000003) | (delta & 0x3fffffc);
+ break;
+ }
+ default:
+ _dl_dprintf(2, "%s: can't handle reloc type ", _dl_progname);
+#if defined (__SUPPORT_LD_DEBUG__)
+ _dl_dprintf(2, "%s ", _dl_reltypes[reloc_type]);
#endif
- //_dl_exit(1);
- return -1;
- };
-
- /* instructions were modified */
- PPC_DCBST(reloc_addr);
- PPC_SYNC;
- PPC_ICBI(reloc_addr);
- PPC_ISYNC;
+ if (symtab_index)
+ _dl_dprintf(2, "'%s'\n", strtab + symtab[symtab_index].st_name);
+ return -1;
+ };
+ /* instructions were modified */
+ PPC_DCBST(reloc_addr);
+ PPC_SYNC;
+ PPC_ICBI(reloc_addr);
+ PPC_ISYNC;
#if defined (__SUPPORT_LD_DEBUG__)
if(_dl_debug_reloc && _dl_debug_detail)
_dl_dprintf(_dl_debug_file, "\tpatched: %x ==> %x @ %x", old_val, *reloc_addr, reloc_addr);
#endif
-
return 0;
}
-
/* This is done as a separate step, because there are cases where
information is first copied and later initialized. This results in
the wrong information being copied. Someone at Sun was complaining about
@@ -615,5 +554,3 @@ int _dl_parse_copy_information(struct dyn_elf *xpnt, unsigned long rel_addr,
(void) type;
return _dl_parse(xpnt->dyn, xpnt->next, rel_addr, rel_size, _dl_do_copy);
}
-
-