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-binitfini emulation, put __rtinit symbol generation into linker.

This commit is contained in:
Tom Rix 2001-12-22 17:18:34 +00:00
parent f398918085
commit 9a4c7f1669
9 changed files with 625 additions and 51 deletions
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13
bfd/ChangeLog
View File

@ -1,3 +1,16 @@
2001-12-21 Tom Rix <trix@redhat.com>
* xcofflink.c (bfd_xcoff_link_generate_rtinit): New function.
Interface to linker for generation of __rtinit.
* libxcoff.h (struct xcoff_backend_data_rec): Add new ops to xcoff
backend to generate special linker symbol __rtinit.
* coff-rs6000.c (bfd_xcoff_backend_data, bfd_pmac_xcoff_backend_data)
: Add new rtinit ops
* coff64-rs6000.c (bfd_xcoff_aix5_backend_data,
bfd_xcoff_backend_data): Same.
* bfd-in.h: Add bfd_xcoff_link_generate_rtinit.
* bfd-in2.h : Regenerate.
2001-12-21 Jakub Jelinek <jakub@redhat.com>
* elf32-sparc.c (_bfd_sparc_elf_howto_table): Fix dst_mask for

2
bfd/bfd-in.h
View File

@ -724,6 +724,8 @@ extern boolean bfd_xcoff_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *, const char *, const char *,
unsigned long, unsigned long, unsigned long, boolean,
int, boolean, boolean, struct sec **));
extern boolean bfd_xcoff_link_generate_rtinit
PARAMS ((bfd *, const char *, const char *));
/* Externally visible COFF routines. */

2
bfd/bfd-in2.h
View File

@ -730,6 +730,8 @@ extern boolean bfd_xcoff_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *, const char *, const char *,
unsigned long, unsigned long, unsigned long, boolean,
int, boolean, boolean, struct sec **));
extern boolean bfd_xcoff_link_generate_rtinit
PARAMS ((bfd *, const char *, const char *));
/* Externally visible COFF routines. */

256
bfd/coff-rs6000.c
View File

@ -2918,6 +2918,254 @@ xcoff_loader_reloc_offset (abfd, ldhdr)
(ldhdr->l_nsyms * bfd_xcoff_ldsymsz(abfd));
}
static boolean
xcoff_generate_rtinit (abfd, init, fini)
bfd *abfd;
const char *init;
const char *fini;
{
bfd_byte filehdr_ext[FILHSZ];
bfd_byte scnhdr_ext[SCNHSZ];
bfd_byte syment_ext[SYMESZ * 8];
bfd_byte reloc_ext[RELSZ * 2];
bfd_byte *data_buffer;
bfd_size_type data_buffer_size;
bfd_byte *string_table, *st_tmp;
bfd_size_type string_table_size;
bfd_vma val;
size_t initsz, finisz;
struct internal_filehdr filehdr;
struct internal_scnhdr scnhdr;
struct internal_syment syment;
union internal_auxent auxent;
struct internal_reloc reloc;
char *data_name = ".data";
char *rtinit_name = "__rtinit";
if (! bfd_xcoff_rtinit_size (abfd)
|| (init == NULL && fini == NULL))
return false;
initsz = (init == NULL ? 0 : 1 + strlen (init));
finisz = (fini == NULL ? 0 : 1 + strlen (fini));
/* file header */
memset (filehdr_ext, 0, FILHSZ);
memset (&filehdr, 0, sizeof (struct internal_filehdr));
filehdr.f_magic = bfd_xcoff_magic_number (abfd);
filehdr.f_nscns = 1;
filehdr.f_timdat = 0;
filehdr.f_nsyms = 0; /* at least 6, no more than 8 */
filehdr.f_symptr = 0; /* set below */
filehdr.f_opthdr = 0;
filehdr.f_flags = 0;
/* section header */
memset (scnhdr_ext, 0, SCNHSZ);
memset (&scnhdr, 0, sizeof (struct internal_scnhdr));
memcpy (scnhdr.s_name, data_name, strlen (data_name));
scnhdr.s_paddr = 0;
scnhdr.s_vaddr = 0;
scnhdr.s_size = 0; /* set below */
scnhdr.s_scnptr = FILHSZ + SCNHSZ;
scnhdr.s_relptr = 0; /* set below */
scnhdr.s_lnnoptr = 0;
scnhdr.s_nreloc = 0; /* either 1 or 2 */
scnhdr.s_nlnno = 0;
scnhdr.s_flags = STYP_DATA;
/* .data
0x0000 0x00000000 : rtl
0x0004 0x00000010 : offset to init, or 0
0x0008 0x00000028 : offset to fini, or 0
0x000C 0x0000000C : size of descriptor
0x0010 0x00000000 : init, needs a reloc
0x0014 0x00000040 : offset to init name
0x0018 0x00000000 : flags, padded to a word
0x001C 0x00000000 : empty init
0x0020 0x00000000 :
0x0024 0x00000000 :
0x0028 0x00000000 : fini, needs a reloc
0x002C 0x00000??? : offset to fini name
0x0030 0x00000000 : flags, padded to a word
0x0034 0x00000000 : empty fini
0x0038 0x00000000 :
0x003C 0x00000000 :
0x0040 init name
0x0040 + initsz fini name */
data_buffer_size = 0x0040 + initsz + finisz;
data_buffer_size += (data_buffer_size & 7) ? 8 - (data_buffer_size & 7) : 0;
data_buffer = (bfd_byte *)bfd_malloc (data_buffer_size);
memset (data_buffer, 0, data_buffer_size);
if (initsz)
{
val = 0x10;
bfd_h_put_32 (abfd, val, &data_buffer[0x04]);
val = 0x40;
bfd_h_put_32 (abfd, val, &data_buffer[0x14]);
memcpy (&data_buffer[val], init, initsz);
}
if (finisz)
{
val = 0x28;
bfd_h_put_32 (abfd, val, &data_buffer[0x08]);
val = 0x40 + initsz;
bfd_h_put_32 (abfd, val, &data_buffer[0x2C]);
memcpy (&data_buffer[val], fini, finisz);
}
val = 0x0C;
bfd_h_put_32 (abfd, val, &data_buffer[0x0C]);
scnhdr.s_size = data_buffer_size;
/* string table */
string_table_size = 0;
if (initsz > 9)
string_table_size += initsz;
if (finisz > 9)
string_table_size += finisz;
if (string_table_size)
{
string_table_size += 4;
string_table = (bfd_byte *)bfd_malloc (string_table_size);
memset (string_table, 0, string_table_size);
val = string_table_size;
bfd_h_put_32 (abfd, val, &string_table[0]);
st_tmp = string_table + 4;
}
/* symbols
0. .data csect
2. __rtinit
4. init function
6. fini function */
memset (syment_ext, 0, 8 * SYMESZ);
memset (reloc_ext, 0, 2 * RELSZ);
/* .data csect */
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
memcpy (syment._n._n_name, data_name, strlen (data_name));
syment.n_scnum = 1;
syment.n_sclass = C_HIDEXT;
syment.n_numaux = 1;
auxent.x_csect.x_scnlen.l = data_buffer_size;
auxent.x_csect.x_smtyp = 3 << 3 | XTY_SD;
auxent.x_csect.x_smclas = XMC_RW;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
filehdr.f_nsyms += 2;
/* __rtinit */
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
memcpy (syment._n._n_name, rtinit_name, strlen (rtinit_name));
syment.n_scnum = 1;
syment.n_sclass = C_EXT;
syment.n_numaux = 1;
auxent.x_csect.x_smtyp = XTY_LD;
auxent.x_csect.x_smclas = XMC_RW;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
filehdr.f_nsyms += 2;
/* init */
if (initsz)
{
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
if (initsz > 9)
{
syment._n._n_n._n_offset = st_tmp - string_table;
memcpy (st_tmp, init, initsz);
st_tmp += initsz;
}
else
memcpy (syment._n._n_name, init, initsz - 1);
syment.n_sclass = C_EXT;
syment.n_numaux = 1;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
/* reloc */
memset (&reloc, 0, sizeof (struct internal_reloc));
reloc.r_vaddr = 0x0010;
reloc.r_symndx = filehdr.f_nsyms;
reloc.r_type = R_POS;
reloc.r_size = 31;
bfd_coff_swap_reloc_out (abfd, &reloc, &reloc_ext[0]);
filehdr.f_nsyms += 2;
scnhdr.s_nreloc += 1;
}
/* fini */
if (finisz)
{
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
if (finisz > 9)
{
syment._n._n_n._n_offset = st_tmp - string_table;
memcpy (st_tmp, fini, finisz);
st_tmp += finisz;
}
else
memcpy (syment._n._n_name, fini, finisz - 1);
syment.n_sclass = C_EXT;
syment.n_numaux = 1;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
/* reloc */
memset (&reloc, 0, sizeof (struct internal_reloc));
reloc.r_vaddr = 0x0028;
reloc.r_symndx = filehdr.f_nsyms;
reloc.r_type = R_POS;
reloc.r_size = 31;
bfd_coff_swap_reloc_out (abfd, &reloc,
&reloc_ext[scnhdr.s_nreloc * RELSZ]);
filehdr.f_nsyms += 2;
scnhdr.s_nreloc += 1;
}
scnhdr.s_relptr = scnhdr.s_scnptr + data_buffer_size;
filehdr.f_symptr = scnhdr.s_relptr + scnhdr.s_nreloc * RELSZ;
bfd_coff_swap_filehdr_out (abfd, &filehdr, filehdr_ext);
bfd_bwrite (filehdr_ext, FILHSZ, abfd);
bfd_coff_swap_scnhdr_out (abfd, &scnhdr, scnhdr_ext);
bfd_bwrite (scnhdr_ext, SCNHSZ, abfd);
bfd_bwrite (data_buffer, data_buffer_size, abfd);
bfd_bwrite (reloc_ext, scnhdr.s_nreloc * RELSZ, abfd);
bfd_bwrite (syment_ext, filehdr.f_nsyms * SYMESZ, abfd);
bfd_bwrite (string_table, string_table_size, abfd);
return true;
}
static reloc_howto_type xcoff_dynamic_reloc =
HOWTO (0, /* type */
@ -3045,6 +3293,10 @@ static const struct xcoff_backend_data_rec bfd_xcoff_backend_data =
/* glink. */
& xcoff_glink_code[0],
(36), /* _xcoff_glink_size */
/* rtinit */
64, /* _xcoff_rtinit_size */
xcoff_generate_rtinit, /* _xcoff_generate_rtinit */
};
/* The transfer vector that leads the outside world to all of the above. */
@ -3302,6 +3554,10 @@ static const struct xcoff_backend_data_rec bfd_pmac_xcoff_backend_data =
&xcoff_glink_code[0],
(36), /* _xcoff_glink_size */
/* rtinit */
0, /* _xcoff_rtinit_size */
xcoff_generate_rtinit, /* _xcoff_generate_rtinit */
};
/* The transfer vector that leads the outside world to all of the above. */

250
bfd/coff64-rs6000.c
View File

@ -2094,6 +2094,252 @@ xcoff64_loader_reloc_offset (abfd, ldhdr)
return (ldhdr->l_rldoff);
}
static boolean
xcoff64_generate_rtinit (abfd, init, fini)
bfd *abfd;
const char *init;
const char *fini;
{
bfd_byte filehdr_ext[FILHSZ];
bfd_byte scnhdr_ext[SCNHSZ];
bfd_byte syment_ext[SYMESZ * 8];
bfd_byte reloc_ext[RELSZ * 2];
bfd_byte *data_buffer;
bfd_size_type data_buffer_size;
bfd_byte *string_table, *st_tmp;
bfd_size_type string_table_size;
bfd_vma val;
size_t initsz, finisz;
struct internal_filehdr filehdr;
struct internal_scnhdr scnhdr;
struct internal_syment syment;
union internal_auxent auxent;
struct internal_reloc reloc;
char *data_name = ".data";
char *rtinit_name = "__rtinit";
if (! bfd_xcoff_rtinit_size (abfd)
|| (init == NULL && fini == NULL))
return false;
initsz = (init == NULL ? 0 : 1 + strlen (init));
finisz = (fini == NULL ? 0 : 1 + strlen (fini));
/* file header */
memset (filehdr_ext, 0, FILHSZ);
memset (&filehdr, 0, sizeof (struct internal_filehdr));
filehdr.f_magic = bfd_xcoff_magic_number (abfd);
filehdr.f_nscns = 1;
filehdr.f_timdat = 0;
filehdr.f_nsyms = 0; /* at least 6, no more than 8 */
filehdr.f_symptr = 0; /* set below */
filehdr.f_opthdr = 0;
filehdr.f_flags = 0;
/* section header */
memset (scnhdr_ext, 0, SCNHSZ);
memset (&scnhdr, 0, sizeof (struct internal_scnhdr));
memcpy (scnhdr.s_name, data_name, strlen (data_name));
scnhdr.s_paddr = 0;
scnhdr.s_vaddr = 0;
scnhdr.s_size = 0; /* set below */
scnhdr.s_scnptr = FILHSZ + SCNHSZ;
scnhdr.s_relptr = 0; /* set below */
scnhdr.s_lnnoptr = 0;
scnhdr.s_nreloc = 0; /* either 1 or 2 */
scnhdr.s_nlnno = 0;
scnhdr.s_flags = STYP_DATA;
/* .data
0x0000 0x00000000 : rtl
0x0004 0x00000000 :
0x0008 0x00000018 : offset to init, or 0
0x000C 0x00000038 : offset to fini, or 0
0x0010 0x00000010 : size of descriptor
0x0014 0x00000000 : pad
0x0018 0x00000000 : init, needs a reloc
0x001C 0x00000000 :
0x0020 0x00000058 : offset to init name
0x0024 0x00000000 : flags, padded to a word
0x0028 0x00000000 : empty init
0x002C 0x00000000 :
0x0030 0x00000000 :
0x0034 0x00000000 :
0x0038 0x00000000 : fini, needs a reloc
0x003C 0x00000000 :
0x0040 0x00000??? : offset to fini name
0x0044 0x00000000 : flags, padded to a word
0x0048 0x00000000 : empty fini
0x004C 0x00000000 :
0x0050 0x00000000 :
0x0054 0x00000000 :
0x0058 init name
0x0058 + initsz fini name */
data_buffer_size = 0x0058 + initsz + finisz;
data_buffer_size += (data_buffer_size & 7) ? 8 - (data_buffer_size & 7) : 0;
data_buffer = (bfd_byte *)bfd_malloc (data_buffer_size);
memset (data_buffer, 0, data_buffer_size);
if (initsz)
{
val = 0x18;
bfd_put_32 (abfd, val, &data_buffer[0x08]);
val = 0x58;
bfd_put_32 (abfd, val, &data_buffer[0x20]);
memcpy (&data_buffer[val], init, initsz);
}
if (finisz)
{
val = 0x38;
bfd_put_32 (abfd, val, &data_buffer[0x0C]);
val = 0x58 + initsz;
bfd_put_32 (abfd, val, &data_buffer[0x40]);
memcpy (&data_buffer[val], fini, finisz);
}
val = 0x10;
bfd_put_32 (abfd, val, &data_buffer[0x10]);
scnhdr.s_size = data_buffer_size;
/* string table */
string_table_size = 4;
string_table_size += strlen (data_name) + 1;
string_table_size += strlen (rtinit_name) + 1;
string_table_size += initsz;
string_table_size += finisz;
string_table = (bfd_byte *)bfd_malloc (string_table_size);
memset (string_table, 0, string_table_size);
val = string_table_size;
bfd_put_32 (abfd, val, &string_table[0]);
st_tmp = string_table + 4;
/* symbols
0. .data csect
2. __rtinit
4. init function
6. fini function */
memset (syment_ext, 0, 8 * SYMESZ);
memset (reloc_ext, 0, 2 * RELSZ);
/* .data csect */
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
syment._n._n_n._n_offset = st_tmp - string_table;
memcpy (st_tmp, data_name, strlen (data_name));
st_tmp += strlen (data_name) + 1;
syment.n_scnum = 1;
syment.n_sclass = C_HIDEXT;
syment.n_numaux = 1;
auxent.x_csect.x_scnlen.l = data_buffer_size;
auxent.x_csect.x_smtyp = 3 << 3 | XTY_SD;
auxent.x_csect.x_smclas = XMC_RW;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
filehdr.f_nsyms += 2;
/* __rtinit */
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
syment._n._n_n._n_offset = st_tmp - string_table;
memcpy (st_tmp, rtinit_name, strlen (rtinit_name));
st_tmp += strlen (rtinit_name) + 1;
syment.n_scnum = 1;
syment.n_sclass = C_EXT;
syment.n_numaux = 1;
auxent.x_csect.x_smtyp = XTY_LD;
auxent.x_csect.x_smclas = XMC_RW;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
filehdr.f_nsyms += 2;
/* init */
if (initsz)
{
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
syment._n._n_n._n_offset = st_tmp - string_table;
memcpy (st_tmp, init, initsz);
st_tmp += initsz;
syment.n_sclass = C_EXT;
syment.n_numaux = 1;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
/* reloc */
memset (&reloc, 0, sizeof (struct internal_reloc));
reloc.r_vaddr = 0x0018;
reloc.r_symndx = filehdr.f_nsyms;
reloc.r_type = R_POS;
reloc.r_size = 63;
bfd_coff_swap_reloc_out (abfd, &reloc, &reloc_ext[0]);
filehdr.f_nsyms += 2;
scnhdr.s_nreloc += 1;
}
/* finit */
if (finisz)
{
memset (&syment, 0, sizeof (struct internal_syment));
memset (&auxent, 0, sizeof (union internal_auxent));
syment._n._n_n._n_offset = st_tmp - string_table;
memcpy (st_tmp, fini, finisz);
st_tmp += finisz;
syment.n_sclass = C_EXT;
syment.n_numaux = 1;
bfd_coff_swap_sym_out (abfd, &syment,
&syment_ext[filehdr.f_nsyms * SYMESZ]);
bfd_coff_swap_aux_out (abfd, &auxent, syment.n_type, syment.n_sclass, 0,
syment.n_numaux,
&syment_ext[(filehdr.f_nsyms + 1) * SYMESZ]);
/* reloc */
memset (&reloc, 0, sizeof (struct internal_reloc));
reloc.r_vaddr = 0x0038;
reloc.r_symndx = filehdr.f_nsyms;
reloc.r_type = R_POS;
reloc.r_size = 63;
bfd_coff_swap_reloc_out (abfd, &reloc,
&reloc_ext[scnhdr.s_nreloc * RELSZ]);
filehdr.f_nsyms += 2;
scnhdr.s_nreloc += 1;
}
scnhdr.s_relptr = scnhdr.s_scnptr + data_buffer_size;
filehdr.f_symptr = scnhdr.s_relptr + scnhdr.s_nreloc * RELSZ;
bfd_coff_swap_filehdr_out (abfd, &filehdr, filehdr_ext);
bfd_bwrite (filehdr_ext, FILHSZ, abfd);
bfd_coff_swap_scnhdr_out (abfd, &scnhdr, scnhdr_ext);
bfd_bwrite (scnhdr_ext, SCNHSZ, abfd);
bfd_bwrite (data_buffer, data_buffer_size, abfd);
bfd_bwrite (reloc_ext, scnhdr.s_nreloc * RELSZ, abfd);
bfd_bwrite (syment_ext, filehdr.f_nsyms * SYMESZ, abfd);
bfd_bwrite (string_table, string_table_size, abfd);
return true;
}
/* The typical dynamic reloc. */
static reloc_howto_type xcoff64_dynamic_reloc =
@ -2219,6 +2465,10 @@ static const struct xcoff_backend_data_rec bfd_xcoff_backend_data =
&xcoff64_glink_code[0],
40, /* _xcoff_glink_size */
/* rtinit */
88, /* _xcoff_rtinit_size */
xcoff64_generate_rtinit, /* _xcoff_generate_rtinit */
};
/* The transfer vector that leads the outside world to all of the above. */

9
bfd/libxcoff.h
View File

@ -112,6 +112,9 @@ struct xcoff_backend_data_rec
*/
unsigned long _xcoff_glink_size;
/* rtinit */
unsigned int _xcoff_rtinit_size;
boolean (*_xcoff_generate_rtinit)(bfd *, const char *, const char *);
};
/* Look up an entry in an XCOFF link hash table. */
@ -201,9 +204,15 @@ struct xcoff_backend_data_rec
#define bfd_xcoff_glink_code(a, b) ((xcoff_backend(a)->_xcoff_glink_code[(b)]))
#define bfd_xcoff_glink_code_size(a) ((xcoff_backend(a)->_xcoff_glink_size))
/* Check for the magic number U803XTOCMAGIC for 64 bit targets. */
#define bfd_xcoff_is_xcoff64(a) (0x01EF == (bfd_xcoff_magic_number(a)))
/* Check for the magic number U802TOMAGIC for 32 bit targets. */
#define bfd_xcoff_is_xcoff32(a) (0x01DF == (bfd_xcoff_magic_number(a)))
#define bfd_xcoff_rtinit_size(a) ((xcoff_backend(a)->_xcoff_rtinit_size))
#define bfd_xcoff_generate_rtinit(a, b, c) ((xcoff_backend(a)->_xcoff_generate_rtinit ((a), (b), (c))))
/* Functions in xcofflink.c. */
extern long _bfd_xcoff_get_dynamic_symtab_upper_bound PARAMS ((bfd *));

35
bfd/xcofflink.c
View File

@ -3219,6 +3219,41 @@ bfd_xcoff_size_dynamic_sections (output_bfd, info, libpath, entry,
return false;
}
boolean
bfd_xcoff_link_generate_rtinit (abfd, init, fini)
bfd *abfd;
const char *init;
const char *fini;
{
struct bfd_in_memory *bim;
bim = ((struct bfd_in_memory *)
bfd_malloc ((bfd_size_type) sizeof (struct bfd_in_memory)));
if (bim == NULL)
return false;
bim->size = 0;
bim->buffer = 0;
abfd->link_next = 0;
abfd->format = bfd_object;
abfd->iostream = (PTR) bim;
abfd->flags = BFD_IN_MEMORY;
abfd->direction = write_direction;
abfd->where = 0;
if (false == bfd_xcoff_generate_rtinit (abfd, init, fini))
return false;
/* need to reset to unknown or it will not be read back in correctly */
abfd->format = bfd_unknown;
abfd->direction = read_direction;
abfd->where = 0;
return true;
}
/* Add a symbol to the .loader symbols, if necessary. */
static boolean

7
ld/ChangeLog
View File

@ -1,3 +1,10 @@
2001-12-21 Tom Rix <trix@redhat.com>
(gld*_create_output_section_statements): New function.
For -binitfini support.
* emultempl/aix.em (gld*_before_parse): Fix comment.
* emultempl/aix.em (gld*_parse_args): Fix comment.
2001-12-20 Jason Thorpe <thorpej@wasabisystems.com>
* configure.tgt (mips*-dec-netbsd*): Delete alias for

102
ld/emultempl/aix.em
View File

@ -67,6 +67,8 @@ static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *));
static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile));
static boolean gld${EMULATION_NAME}_unrecognized_file
PARAMS ((lang_input_statement_type *));
static void gld${EMULATION_NAME}_create_output_section_statements
PARAMS((void));
static int is_syscall PARAMS ((char *, unsigned int *));
static int change_symbol_mode PARAMS ((char *));
@ -126,6 +128,9 @@ static int is_64bit = 0;
/* Which syscalls from import file are valid */
static unsigned int syscall_mask = 0x77;
/* fake file for -binitfini support */
static lang_input_statement_type *initfini_file;
/* This routine is called before anything else is done. */
static void
@ -144,11 +149,10 @@ gld${EMULATION_NAME}_before_parse ()
#endif /* not TARGET_ */
config.has_shared = true;
/*
* The link_info.[init|fini]_functions are initialized in ld/lexsup.c.
* Override them here so we can use the link_info.init_function as a
* state flag that lets the backend know that -binitfini has been done.
*/
/* The link_info.[init|fini]_functions are initialized in ld/lexsup.c.
Override them here so we can use the link_info.init_function as a
state flag that lets the backend know that -binitfini has been done. */
link_info.init_function = NULL;
link_info.fini_function = NULL;
@ -192,51 +196,14 @@ gld${EMULATION_NAME}_parse_args (argc, argv)
OPTION_64,
};
/*
binitfini has special handling in the linker backend. The native linker
uses the arguemnts to generate a table of init and fini functions for
the executable. The important use for this option is to support aix 4.2+
c++ constructors and destructors. This is tied into gcc via collect2.c.
The function table is accessed by the runtime linker/loader by checking if
the first symbol in the loader symbol table is "__rtinit". The native
linker generates this table and the loader symbol. The gnu linker looks
for the symbol "__rtinit" and makes it the first loader symbol. It is the
responsiblity of the user to define the __rtinit symbol. The format for
__rtinit is given by the aix system file /usr/include/rtinit.h. You can
look at collect2.c to see an example of how this is done for 32 and 64 bit.
Below is an exmaple of a 32 bit assembly file that defines __rtinit.
.file "my_rtinit.s"
.csect .data[RW],3
.globl __rtinit
.extern init_function
.extern fini_function
__rtinit:
.long 0
.long f1i - __rtinit
.long f1f - __rtinit
.long f2i - f1i
.align 3
f1i: .long init_function
.long s1i - __rtinit
.long 0
f2i: .long 0
.long 0
.long 0
f1f: .long fini_function
.long s1f - __rtinit
.long 0
f2f: .long 0
.long 0
.long 0
.align 3
s1i: .string "init_function"
.align 3
s1f: .string "fini_function"
*/
/* -binitfini has special handling in the linker backend. The native linker
uses the arguemnts to generate a table of init and fini functions for
the executable. The important use for this option is to support aix 4.2+
c++ constructors and destructors. This is tied into gcc via collect2.c.
The function table is accessed by the runtime linker/loader by checking if
the first symbol in the loader symbol table is __rtinit. The gnu linker
generates this symbol and makes it the first loader symbol. */
static const struct option longopts[] = {
{"basis", no_argument, NULL, OPTION_IGNORE},
@ -1319,6 +1286,39 @@ fi
cat >>e${EMULATION_NAME}.c <<EOF
static void
gld${EMULATION_NAME}_create_output_section_statements()
{
/* __rtinit */
if ((bfd_get_flavour (output_bfd) == bfd_target_xcoff_flavour)
&& (link_info.init_function != NULL || link_info.fini_function != NULL))
{
initfini_file = lang_add_input_file ("initfini",
lang_input_file_is_file_enum,
NULL);
initfini_file->the_bfd = bfd_create ("initfini", output_bfd);
if (initfini_file->the_bfd == NULL
|| ! bfd_set_arch_mach (initfini_file->the_bfd,
bfd_get_arch (output_bfd),
bfd_get_mach (output_bfd)))
{
einfo ("%X%P: can not create BFD %E\n");
return;
}
/* Call backend to fill in the rest */
if (false == bfd_xcoff_link_generate_rtinit (initfini_file->the_bfd,
link_info.init_function,
link_info.fini_function))
{
einfo ("%X%P: can not create BFD %E\n");
return;
}
}
}
struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
gld${EMULATION_NAME}_before_parse,
syslib_default,
@ -1333,7 +1333,7 @@ struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = {
"${EMULATION_NAME}",
"${OUTPUT_FORMAT}",
0, /* finish */
0, /* create_output_section_statements */
gld${EMULATION_NAME}_create_output_section_statements,
0, /* open_dynamic_archive */
0, /* place_orphan */
0, /* set_symbols */