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Differential D13838 Diff 37756 sys/i386/i386/elf_machdep.c

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sys/i386/i386/elf_machdep.c

Show First 20 Lines • Show All 154 Lines • ▼ Show 20 Lines if (dst != NULL) {
xsave_mask; xsave_mask;
} else } else
len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL, len += elf32_populate_note(NT_X86_XSTATE, NULL, NULL,
cpu_max_ext_state_size, NULL); cpu_max_ext_state_size, NULL);
} }
*off = len; *off = len;
} }
#define ERI_LOCAL 0x0001
#define ERI_ONLYIFUNC 0x0002
/* Process one elf relocation with addend. */ /* Process one elf relocation with addend. */
static int static int
elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
int type, int local, elf_lookup_fn lookup) int type, elf_lookup_fn lookup, int flags)
{ {
Elf_Addr *where; Elf_Addr *where;
Elf_Addr addr; Elf_Addr addr;
Elf_Addr addend; Elf_Addr addend;
Elf_Word rtype, symidx; Elf_Word rtype, symidx;
const Elf_Rel *rel; const Elf_Rel *rel;
const Elf_Rela *rela; const Elf_Rela *rela;
int error; int error;
Show All 12 Lines case ELF_RELOC_RELA:
addend = rela->r_addend; addend = rela->r_addend;
rtype = ELF_R_TYPE(rela->r_info); rtype = ELF_R_TYPE(rela->r_info);
symidx = ELF_R_SYM(rela->r_info); symidx = ELF_R_SYM(rela->r_info);
break; break;
default: default:
panic("unknown reloc type %d\n", type); panic("unknown reloc type %d\n", type);
} }
if (local) { if (((flags & ERI_ONLYIFUNC) == 0) ^ (rtype != R_386_IRELATIVE))
return (0);
if ((flags & ERI_LOCAL) != 0) {
if (rtype == R_386_RELATIVE) { /* A + B */ if (rtype == R_386_RELATIVE) { /* A + B */
addr = elf_relocaddr(lf, relocbase + addend); addr = elf_relocaddr(lf, relocbase + addend);
if (*where != addr) if (*where != addr)
*where = addr; *where = addr;
} }
return (0); return (0);
} }
Show All 35 Lines case R_386_GLOB_DAT: /* S */
return -1; return -1;
if (*where != addr) if (*where != addr)
*where = addr; *where = addr;
break; break;
case R_386_RELATIVE: case R_386_RELATIVE:
break; break;
case R_386_IRELATIVE:
addr = relocbase + addend;
addr = ((Elf_Addr (*)(void))addr)();
if (*where != addr)
*where = addr;
break;
default: default:
printf("kldload: unexpected relocation type %d\n", printf("kldload: unexpected relocation type %d\n",
rtype); rtype);
return -1; return -1;
} }
return(0); return(0);
} }
int int
elf_reloc_ifunc(linker_file_t lf, Elf_Addr relocbase, const void *data,
int type, elf_lookup_fn lookup)
{
return (elf_reloc_internal(lf, relocbase, data, type, lookup,
ERI_ONLYIFUNC));
}
int
elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type,
elf_lookup_fn lookup) elf_lookup_fn lookup)
{ {
return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); return (elf_reloc_internal(lf, relocbase, data, type, lookup, 0));
} }
int int
elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data,
int type, elf_lookup_fn lookup) int type, elf_lookup_fn lookup)
{ {
return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); return (elf_reloc_internal(lf, relocbase, data, type, lookup,
ERI_LOCAL));
} }
int int
elf_cpu_load_file(linker_file_t lf __unused) elf_cpu_load_file(linker_file_t lf __unused)
{ {
return (0); return (0);
} }
int int
elf_cpu_unload_file(linker_file_t lf __unused) elf_cpu_unload_file(linker_file_t lf __unused)
{ {
return (0); return (0);
} }