#include "elf-bfd.h"
#include "elf/msp430.h"
-static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
- PARAMS ((bfd *, bfd_reloc_code_real_type));
-
-static void msp430_info_to_howto_rela
- PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
-
-static asection *elf32_msp430_gc_mark_hook
- PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-
-static bfd_boolean elf32_msp430_gc_sweep_hook
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-
-static bfd_boolean elf32_msp430_check_relocs
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
-
-static bfd_reloc_status_type msp430_final_link_relocate
- PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, bfd_vma));
-
-static bfd_boolean elf32_msp430_relocate_section
- PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
- Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
-
-static void bfd_elf_msp430_final_write_processing
- PARAMS ((bfd *, bfd_boolean));
-
-static bfd_boolean elf32_msp430_object_p
- PARAMS ((bfd *));
-
-static void elf32_msp430_post_process_headers
- PARAMS ((bfd *, struct bfd_link_info *));
-
/* Use RELA instead of REL. */
#undef USE_REL
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_bitfield,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_NONE", /* name */
FALSE, /* partial_inplace */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_bitfield,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_32", /* name */
FALSE, /* partial_inplace */
10, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_bitfield,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_13_PCREL", /* name */
FALSE, /* partial_inplace */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_16", /* name */
FALSE, /* partial_inplace */
- 0xffff, /* src_mask */
+ 0, /* src_mask */
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
bfd_elf_generic_reloc, /* special_function */
"R_MSP430_16_PCREL", /* name */
FALSE, /* partial_inplace */
- 0xffff, /* src_mask */
+ 0, /* src_mask */
0xffff, /* dst_mask */
TRUE), /* pcrel_offset */
0, /* bitpos */
complain_overflow_dont,/* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
- "R_MSP430_16_PCREL_BYTE", /* name */
+ "R_MSP430_16_PCREL_BYTE",/* name */
FALSE, /* partial_inplace */
0xffff, /* src_mask */
0xffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 13 bit PC relative relocation for complicated polymorphs. */
+ HOWTO (R_MSP430_2X_PCREL, /* type */
+ 1, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 10, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_2X_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0xfff, /* src_mask */
+ 0xfff, /* dst_mask */
+ TRUE), /* pcrel_offset */
+
+ /* A 16 bit relaxable relocation for command address. */
+ HOWTO (R_MSP430_RL_PCREL, /* type */
+ 1, /* rightshift */
+ 1, /* size (0 = byte, 1 = short, 2 = long) */
+ 16, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_dont,/* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_MSP430_RL_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0, /* src_mask */
+ 0xffff, /* dst_mask */
TRUE) /* pcrel_offset */
};
static const struct msp430_reloc_map msp430_reloc_map[] =
{
- {BFD_RELOC_NONE, R_MSP430_NONE},
- {BFD_RELOC_32, R_MSP430_32},
- {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
- {BFD_RELOC_16, R_MSP430_16_BYTE},
- {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
- {BFD_RELOC_MSP430_16, R_MSP430_16},
+ {BFD_RELOC_NONE, R_MSP430_NONE},
+ {BFD_RELOC_32, R_MSP430_32},
+ {BFD_RELOC_MSP430_10_PCREL, R_MSP430_10_PCREL},
+ {BFD_RELOC_16, R_MSP430_16_BYTE},
+ {BFD_RELOC_MSP430_16_PCREL, R_MSP430_16_PCREL},
+ {BFD_RELOC_MSP430_16, R_MSP430_16},
{BFD_RELOC_MSP430_16_PCREL_BYTE, R_MSP430_16_PCREL_BYTE},
- {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE}
+ {BFD_RELOC_MSP430_16_BYTE, R_MSP430_16_BYTE},
+ {BFD_RELOC_MSP430_2X_PCREL, R_MSP430_2X_PCREL},
+ {BFD_RELOC_MSP430_RL_PCREL, R_MSP430_RL_PCREL}
};
static reloc_howto_type *
-bfd_elf32_bfd_reloc_type_lookup (abfd, code)
- bfd *abfd ATTRIBUTE_UNUSED;
- bfd_reloc_code_real_type code;
+bfd_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
unsigned int i;
/* Set the howto pointer for an MSP430 ELF reloc. */
static void
-msp430_info_to_howto_rela (abfd, cache_ptr, dst)
- bfd *abfd ATTRIBUTE_UNUSED;
- arelent *cache_ptr;
- Elf_Internal_Rela *dst;
+msp430_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
{
unsigned int r_type;
}
static asection *
-elf32_msp430_gc_mark_hook (sec, info, rel, h, sym)
- asection *sec;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- Elf_Internal_Rela *rel;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+elf32_msp430_gc_mark_hook (asection * sec,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela * rel,
+ struct elf_link_hash_entry * h,
+ Elf_Internal_Sym * sym)
{
if (h != NULL)
{
}
static bfd_boolean
-elf32_msp430_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
+elf32_msp430_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info ATTRIBUTE_UNUSED,
+ asection * sec ATTRIBUTE_UNUSED,
+ const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
{
/* We don't use got and plt entries for msp430. */
return TRUE;
virtual table relocs for gc. */
static bfd_boolean
-elf32_msp430_check_relocs (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
+elf32_msp430_check_relocs (bfd * abfd, struct bfd_link_info * info,
+ asection * sec, const Elf_Internal_Rela * relocs)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
routines, but a few relocs, we have to do them ourselves. */
static bfd_reloc_status_type
-msp430_final_link_relocate (howto, input_bfd, input_section,
- contents, rel, relocation)
- reloc_howto_type *howto;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *rel;
- bfd_vma relocation;
+msp430_final_link_relocate (reloc_howto_type * howto, bfd * input_bfd,
+ asection * input_section, bfd_byte * contents,
+ Elf_Internal_Rela * rel, bfd_vma relocation)
{
bfd_reloc_status_type r = bfd_reloc_ok;
bfd_vma x;
bfd_put_16 (input_bfd, x, contents);
break;
+ case R_MSP430_2X_PCREL:
+ contents += rel->r_offset;
+ srel = (bfd_signed_vma) relocation;
+ srel += rel->r_addend;
+ srel -= rel->r_offset;
+ srel -= 2; /* Branch instructions add 2 to the PC... */
+ srel -= (input_section->output_section->vma +
+ input_section->output_offset);
+
+ if (srel & 1)
+ return bfd_reloc_outofrange;
+
+ /* MSP430 addresses commands as words. */
+ srel >>= 1;
+
+ /* Check for an overflow. */
+ if (srel < -512 || srel > 511)
+ return bfd_reloc_overflow;
+
+ x = bfd_get_16 (input_bfd, contents);
+ x = (x & 0xfc00) | (srel & 0x3ff);
+ bfd_put_16 (input_bfd, x, contents);
+ /* Handle second jump instruction. */
+ x = bfd_get_16 (input_bfd, contents - 2);
+ srel += 1;
+ x = (x & 0xfc00) | (srel & 0x3ff);
+ bfd_put_16 (input_bfd, x, contents - 2);
+ break;
+
case R_MSP430_16_PCREL:
+ case R_MSP430_RL_PCREL:
contents += rel->r_offset;
srel = (bfd_signed_vma) relocation;
srel += rel->r_addend;
/* Relocate an MSP430 ELF section. */
static bfd_boolean
-elf32_msp430_relocate_section (output_bfd, info, input_bfd, input_section,
- contents, relocs, local_syms, local_sections)
- bfd *output_bfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info;
- bfd *input_bfd;
- asection *input_section;
- bfd_byte *contents;
- Elf_Internal_Rela *relocs;
- Elf_Internal_Sym *local_syms;
- asection **local_sections;
+elf32_msp430_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info * info,
+ bfd * input_bfd,
+ asection * input_section,
+ bfd_byte * contents,
+ Elf_Internal_Rela * relocs,
+ Elf_Internal_Sym * local_syms,
+ asection ** local_sections)
{
Elf_Internal_Shdr *symtab_hdr;
struct elf_link_hash_entry **sym_hashes;
number. */
static void
-bfd_elf_msp430_final_write_processing (abfd, linker)
- bfd *abfd;
- bfd_boolean linker ATTRIBUTE_UNUSED;
+bfd_elf_msp430_final_write_processing (bfd * abfd,
+ bfd_boolean linker ATTRIBUTE_UNUSED)
{
unsigned long val;
/* Set the right machine number. */
static bfd_boolean
-elf32_msp430_object_p (abfd)
- bfd *abfd;
+elf32_msp430_object_p (bfd * abfd)
{
int e_set = bfd_mach_msp14;
}
static void
-elf32_msp430_post_process_headers (abfd, link_info)
- bfd *abfd;
- struct bfd_link_info *link_info ATTRIBUTE_UNUSED;
+elf32_msp430_post_process_headers (bfd * abfd,
+ struct bfd_link_info * link_info ATTRIBUTE_UNUSED)
{
- Elf_Internal_Ehdr *i_ehdrp; /* ELF file header, internal form. */
+ Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */
i_ehdrp = elf_elfheader (abfd);
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_STANDALONE;
}
+/* These functions handle relaxing for the msp430.
+ Relaxation required only in two cases:
+ - Bad hand coding like jumps from one section to another or
+ from file to file.
+ - Sibling calls. This will affect onlu 'jump label' polymorph. Without
+ relaxing this enlarges code by 2 bytes. Sibcalls implemented but
+ do not work in gcc's port by the reason I do not know.
+ Anyway, if a relaxation required, user should pass -relax option to the
+ linker.
+
+ There are quite a few relaxing opportunities available on the msp430:
+
+ ================================================================
+
+ 1. 3 words -> 1 word
+
+ eq == jeq label jne +4; br lab
+ ne != jne label jeq +4; br lab
+ lt < jl label jge +4; br lab
+ ltu < jlo label lhs +4; br lab
+ ge >= jge label jl +4; br lab
+ geu >= jhs label jlo +4; br lab
+
+ 2. 4 words -> 1 word
+
+ ltn < jn jn +2; jmp +4; br lab
+
+ 3. 4 words -> 2 words
+
+ gt > jeq +2; jge label jeq +6; jl +4; br label
+ gtu > jeq +2; jhs label jeq +6; jlo +4; br label
+
+ 4. 4 words -> 2 words and 2 labels
+
+ leu <= jeq label; jlo label jeq +2; jhs +4; br label
+ le <= jeq label; jl label jeq +2; jge +4; br label
+ =================================================================
+
+ codemap for first cases is (labels masked ):
+ eq: 0x2002,0x4010,0x0000 -> 0x2400
+ ne: 0x2402,0x4010,0x0000 -> 0x2000
+ lt: 0x3402,0x4010,0x0000 -> 0x3800
+ ltu: 0x2c02,0x4010,0x0000 -> 0x2800
+ ge: 0x3802,0x4010,0x0000 -> 0x3400
+ geu: 0x2802,0x4010,0x0000 -> 0x2c00
+
+ second case:
+ ltn: 0x3001,0x3c02,0x4010,0x0000 -> 0x3000
+
+ third case:
+ gt: 0x2403,0x3802,0x4010,0x0000 -> 0x2401,0x3400
+ gtu: 0x2403,0x2802,0x4010,0x0000 -> 0x2401,0x2c00
+
+ fourth case:
+ leu: 0x2401,0x2c02,0x4010,0x0000 -> 0x2400,0x2800
+ le: 0x2401,0x3402,0x4010,0x0000 -> 0x2400,0x3800
+
+ Unspecified case :)
+ jump: 0x4010,0x0000 -> 0x3c00. */
+
+#define NUMB_RELAX_CODES 12
+static struct rcodes_s
+{
+ int f0, f1; /* From code. */
+ int t0, t1; /* To code. */
+ int labels; /* Position of labels: 1 - one label at first
+ word, 2 - one at second word, 3 - two
+ labels at both. */
+ int cdx; /* Words to match. */
+ int bs; /* Shrink bytes. */
+ int off; /* Offset from old label for new code. */
+ int ncl; /* New code length. */
+} rcode[] =
+{/* lab,cdx,bs,off,ncl */
+ { 0x0000, 0x0000, 0x3c00, 0x0000, 1, 0, 2, 2, 2}, /* jump */
+ { 0x0000, 0x2002, 0x2400, 0x0000, 1, 1, 4, 4, 2}, /* eq */
+ { 0x0000, 0x2402, 0x2000, 0x0000, 1, 1, 4, 4, 2}, /* ne */
+ { 0x0000, 0x3402, 0x3800, 0x0000, 1, 1, 4, 4, 2}, /* lt */
+ { 0x0000, 0x2c02, 0x2800, 0x0000, 1, 1, 4, 4, 2}, /* ltu */
+ { 0x0000, 0x3802, 0x3400, 0x0000, 1, 1, 4, 4, 2}, /* ge */
+ { 0x0000, 0x2802, 0x2c00, 0x0000, 1, 1, 4, 4, 2}, /* geu */
+ { 0x3001, 0x3c02, 0x3000, 0x0000, 1, 2, 6, 6, 2}, /* ltn */
+ { 0x2403, 0x3802, 0x2401, 0x3400, 2, 2, 4, 6, 4}, /* gt */
+ { 0x2403, 0x2802, 0x2401, 0x2c00, 2, 2, 4, 6, 4}, /* gtu */
+ { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* leu , 2 labels */
+ { 0x2401, 0x2c02, 0x2400, 0x2800, 3, 2, 4, 6, 4}, /* le , 2 labels */
+ { 0, 0, 0, 0, 0, 0, 0, 0, 0}
+};
+
+/* Return TRUE if a symbol exists at the given address. */
+
+static bfd_boolean
+msp430_elf_symbol_address_p (bfd * abfd,
+ asection * sec,
+ Elf_Internal_Sym * isym,
+ bfd_vma addr)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ Elf_Internal_Sym *isymend;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ /* Examine all the local symbols. */
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
+ if (isym->st_shndx == sec_shndx && isym->st_value == addr)
+ return TRUE;
+
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
+
+ if ((sym_hash->root.type == bfd_link_hash_defined
+ || sym_hash->root.type == bfd_link_hash_defweak)
+ && sym_hash->root.u.def.section == sec
+ && sym_hash->root.u.def.value == addr)
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/* Delete some bytes from a section while relaxing. */
+
+static bfd_boolean
+msp430_elf_relax_delete_bytes (bfd * abfd, asection * sec, bfd_vma addr,
+ int count)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ unsigned int sec_shndx;
+ bfd_byte *contents;
+ Elf_Internal_Rela *irel;
+ Elf_Internal_Rela *irelend;
+ Elf_Internal_Rela *irelalign;
+ bfd_vma toaddr;
+ Elf_Internal_Sym *isym;
+ Elf_Internal_Sym *isymend;
+ struct elf_link_hash_entry **sym_hashes;
+ struct elf_link_hash_entry **end_hashes;
+ unsigned int symcount;
+
+ sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
+
+ contents = elf_section_data (sec)->this_hdr.contents;
+
+ /* The deletion must stop at the next ALIGN reloc for an aligment
+ power larger than the number of bytes we are deleting. */
+
+ irelalign = NULL;
+ toaddr = sec->size;
+
+ irel = elf_section_data (sec)->relocs;
+ irelend = irel + sec->reloc_count;
+
+ /* Actually delete the bytes. */
+ memmove (contents + addr, contents + addr + count,
+ (size_t) (toaddr - addr - count));
+ sec->size -= count;
+
+ /* Adjust all the relocs. */
+ for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
+ /* Get the new reloc address. */
+ if ((irel->r_offset > addr && irel->r_offset < toaddr))
+ irel->r_offset -= count;
+
+ /* Adjust the local symbols defined in this section. */
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+ isym = (Elf_Internal_Sym *) symtab_hdr->contents;
+ for (isymend = isym + symtab_hdr->sh_info; isym < isymend; isym++)
+ if (isym->st_shndx == sec_shndx
+ && isym->st_value > addr && isym->st_value < toaddr)
+ isym->st_value -= count;
+
+ /* Now adjust the global symbols defined in this section. */
+ symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
+ - symtab_hdr->sh_info);
+ sym_hashes = elf_sym_hashes (abfd);
+ end_hashes = sym_hashes + symcount;
+ for (; sym_hashes < end_hashes; sym_hashes++)
+ {
+ struct elf_link_hash_entry *sym_hash = *sym_hashes;
+
+ if ((sym_hash->root.type == bfd_link_hash_defined
+ || sym_hash->root.type == bfd_link_hash_defweak)
+ && sym_hash->root.u.def.section == sec
+ && sym_hash->root.u.def.value > addr
+ && sym_hash->root.u.def.value < toaddr)
+ sym_hash->root.u.def.value -= count;
+ }
+
+ return TRUE;
+}
+
+
+static bfd_boolean
+msp430_elf_relax_section (bfd * abfd, asection * sec,
+ struct bfd_link_info * link_info,
+ bfd_boolean * again)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ Elf_Internal_Rela * internal_relocs;
+ Elf_Internal_Rela * irel;
+ Elf_Internal_Rela * irelend;
+ bfd_byte * contents = NULL;
+ Elf_Internal_Sym * isymbuf = NULL;
+
+ /* Assume nothing changes. */
+ *again = FALSE;
+
+ /* We don't have to do anything for a relocatable link, if
+ this section does not have relocs, or if this is not a
+ code section. */
+ if (link_info->relocatable
+ || (sec->flags & SEC_RELOC) == 0
+ || sec->reloc_count == 0 || (sec->flags & SEC_CODE) == 0)
+ return TRUE;
+
+ symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
+
+ /* Get a copy of the native relocations. */
+ internal_relocs =
+ _bfd_elf_link_read_relocs (abfd, sec, NULL, NULL, link_info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ /* Walk through them looking for relaxing opportunities. */
+ irelend = internal_relocs + sec->reloc_count;
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ bfd_vma symval;
+
+ /* If this isn't something that can be relaxed, then ignore
+ this reloc. */
+ if (ELF32_R_TYPE (irel->r_info) != (int) R_MSP430_RL_PCREL)
+ continue;
+
+ /* Get the section contents if we haven't done so already. */
+ if (contents == NULL)
+ {
+ /* Get cached copy if it exists. */
+ if (elf_section_data (sec)->this_hdr.contents != NULL)
+ contents = elf_section_data (sec)->this_hdr.contents;
+ else if (! bfd_malloc_and_get_section (abfd, sec, &contents))
+ goto error_return;
+ }
+
+ /* Read this BFD's local symbols if we haven't done so already. */
+ if (isymbuf == NULL && symtab_hdr->sh_info != 0)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == NULL)
+ goto error_return;
+ }
+
+ /* Get the value of the symbol referred to by the reloc. */
+ if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+ asection *sym_sec;
+
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ if (isym->st_shndx == SHN_UNDEF)
+ sym_sec = bfd_und_section_ptr;
+ else if (isym->st_shndx == SHN_ABS)
+ sym_sec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ sym_sec = bfd_com_section_ptr;
+ else
+ sym_sec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ symval = (isym->st_value
+ + sym_sec->output_section->vma + sym_sec->output_offset);
+ }
+ else
+ {
+ unsigned long indx;
+ struct elf_link_hash_entry *h;
+
+ /* An external symbol. */
+ indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
+ h = elf_sym_hashes (abfd)[indx];
+ BFD_ASSERT (h != NULL);
+
+ if (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak)
+ /* This appears to be a reference to an undefined
+ symbol. Just ignore it--it will be caught by the
+ regular reloc processing. */
+ continue;
+
+ symval = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ }
+
+ /* For simplicity of coding, we are going to modify the section
+ contents, the section relocs, and the BFD symbol table. We
+ must tell the rest of the code not to free up this
+ information. It would be possible to instead create a table
+ of changes which have to be made, as is done in coff-mips.c;
+ that would be more work, but would require less memory when
+ the linker is run. */
+
+ /* Try to turn a 16bit pc-relative branch into a 10bit pc-relative
+ branch. */
+ /* Paranoia? paranoia... */
+ if (ELF32_R_TYPE (irel->r_info) == (int) R_MSP430_RL_PCREL)
+ {
+ bfd_vma value = symval;
+
+ /* Deal with pc-relative gunk. */
+ value -= (sec->output_section->vma + sec->output_offset);
+ value -= irel->r_offset;
+ value += irel->r_addend;
+
+ /* See if the value will fit in 10 bits, note the high value is
+ 1016 as the target will be two bytes closer if we are
+ able to relax. */
+ if ((long) value < 1016 && (long) value > -1016)
+ {
+ int code0 = 0, code1 = 0, code2 = 0;
+ int i;
+ struct rcodes_s *rx;
+
+ /* Get the opcode. */
+ if (irel->r_offset >= 6)
+ code0 = bfd_get_16 (abfd, contents + irel->r_offset - 6);
+
+ if (irel->r_offset >= 4)
+ code1 = bfd_get_16 (abfd, contents + irel->r_offset - 4);
+
+ code2 = bfd_get_16 (abfd, contents + irel->r_offset - 2);
+
+ if (code2 != 0x4010)
+ continue;
+
+ /* Check r4 and r3. */
+ for (i = NUMB_RELAX_CODES - 1; i >= 0; i--)
+ {
+ rx = &rcode[i];
+ if (rx->cdx == 2 && rx->f0 == code0 && rx->f1 == code1)
+ break;
+ else if (rx->cdx == 1 && rx->f1 == code1)
+ break;
+ else if (rx->cdx == 0) /* This is an unconditional jump. */
+ break;
+ }
+
+ /* Check labels:
+ .Label0: ; we do not care about this label
+ jeq +6
+ .Label1: ; make sure there is no label here
+ jl +4
+ .Label2: ; make sure there is no label here
+ br .Label_dst
+
+ So, if there is .Label1 or .Label2 we cannot relax this code.
+ This actually should not happen, cause for relaxable
+ instructions we use RL_PCREL reloc instead of 16_PCREL.
+ Will change this in the future. */
+
+ if (rx->cdx > 0
+ && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
+ irel->r_offset - 2))
+ continue;
+ if (rx->cdx > 1
+ && msp430_elf_symbol_address_p (abfd, sec, isymbuf,
+ irel->r_offset - 4))
+ continue;
+
+ /* Note that we've changed the relocs, section contents, etc. */
+ elf_section_data (sec)->relocs = internal_relocs;
+ elf_section_data (sec)->this_hdr.contents = contents;
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+
+ /* Fix the relocation's type. */
+ if (rx->labels == 3) /* Handle special cases. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430_2X_PCREL);
+ else
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ R_MSP430_10_PCREL);
+
+ /* Fix the opcode right way. */
+ bfd_put_16 (abfd, rx->t0, contents + irel->r_offset - rx->off);
+ if (rx->t1)
+ bfd_put_16 (abfd, rx->t1,
+ contents + irel->r_offset - rx->off + 2);
+
+ /* Delete bytes. */
+ if (!msp430_elf_relax_delete_bytes (abfd, sec,
+ irel->r_offset - rx->off +
+ rx->ncl, rx->bs))
+ goto error_return;
+
+ /* Handle unconditional jumps. */
+ if (rx->cdx == 0)
+ irel->r_offset -= 2;
+
+ /* That will change things, so, we should relax again.
+ Note that this is not required, and it may be slow. */
+ *again = TRUE;
+ }
+ }
+ }
+
+ if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (!link_info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+ }
+
+ if (contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != contents)
+ {
+ if (!link_info->keep_memory)
+ free (contents);
+ else
+ {
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (sec)->this_hdr.contents = contents;
+ }
+ }
+
+ if (internal_relocs != NULL
+ && elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ return TRUE;
+
+error_return:
+ if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
+ free (isymbuf);
+ if (contents != NULL
+ && elf_section_data (sec)->this_hdr.contents != contents)
+ free (contents);
+ if (internal_relocs != NULL
+ && elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
+
+ return FALSE;
+}
+
#define ELF_ARCH bfd_arch_msp430
#define ELF_MACHINE_CODE EM_MSP430
#define elf_backend_final_write_processing bfd_elf_msp430_final_write_processing
#define elf_backend_object_p elf32_msp430_object_p
#define elf_backend_post_process_headers elf32_msp430_post_process_headers
+#define bfd_elf32_bfd_relax_section msp430_elf_relax_section
#include "elf32-target.h"
static struct hash_control *msp430_hash;
-static unsigned int msp430_operands
- PARAMS ((struct msp430_opcode_s *, char *));
-static int msp430_srcoperand
- PARAMS ((struct msp430_operand_s *, char *, int, int *));
-static int msp430_dstoperand
- PARAMS ((struct msp430_operand_s *, char *, int));
-static char *parse_exp
- PARAMS ((char *, expressionS *));
-static inline char *skip_space
- PARAMS ((char *));
-static int check_reg
- PARAMS ((char *));
-static void msp430_set_arch
- PARAMS ((int));
-static void show_mcu_list
- PARAMS ((FILE *));
-static void del_spaces
- PARAMS ((char *));
+/* Relaxations. */
+#define STATE_UNCOND_BRANCH 1 /* jump */
+#define STATE_NOOV_BRANCH 3 /* bltn */
+#define STATE_SIMPLE_BRANCH 2 /* bne, beq, etc... */
+#define STATE_EMUL_BRANCH 4
+
+#define CNRL 2
+#define CUBL 4
+#define CNOL 8
+#define CSBL 6
+#define CEBL 4
+
+/* Length. */
+#define STATE_BITS10 1 /* wild guess. short jump */
+#define STATE_WORD 2 /* 2 bytes pc rel. addr. more */
+#define STATE_UNDEF 3 /* cannot handle this yet. convert to word mode */
+
+#define ENCODE_RELAX(what,length) (((what) << 2) + (length))
+#define RELAX_STATE(s) ((s) & 3)
+#define RELAX_LEN(s) ((s) >> 2)
+#define RELAX_NEXT(a,b) ENCODE_RELAX (a, b + 1)
+
+relax_typeS md_relax_table[] =
+{
+ /* Unused. */
+ {1, 1, 0, 0},
+ {1, 1, 0, 0},
+ {1, 1, 0, 0},
+ {1, 1, 0, 0},
+
+ /* Unconditional jump. */
+ {1, 1, 8, 5},
+ {1024, -1024, CNRL, RELAX_NEXT (STATE_UNCOND_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CUBL, RELAX_NEXT (STATE_UNCOND_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CUBL, 0}, /* state undef */
+
+ /* Simple branches. */
+ {0, 0, 8, 9},
+ {1024, -1024, CNRL, RELAX_NEXT (STATE_SIMPLE_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CSBL, RELAX_NEXT (STATE_SIMPLE_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CSBL, 0},
+
+ /* blt no overflow branch. */
+ {1, 1, 8, 13},
+ {1024, -1024, CNRL, RELAX_NEXT (STATE_NOOV_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CNOL, RELAX_NEXT (STATE_NOOV_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CNOL, 0},
+
+ /* Emulated branches. */
+ {1, 1, 8, 17},
+ {1020, -1020, CEBL, RELAX_NEXT (STATE_EMUL_BRANCH, STATE_BITS10)}, /* state 10 bits displ */
+ {0, 0, CNOL, RELAX_NEXT (STATE_EMUL_BRANCH, STATE_WORD)}, /* state word */
+ {1, 1, CNOL, 0}
+};
+
#define MAX_OP_LEN 256
struct mcu_type_s
{
- char *name;
+ char * name;
int isa;
int mach;
};
static struct mcu_type_s mcu_types[] =
{
- {"msp1", MSP430_ISA_11, bfd_mach_msp11},
- {"msp2", MSP430_ISA_14, bfd_mach_msp14},
- {"msp430x110", MSP430_ISA_11, bfd_mach_msp11},
- {"msp430x112", MSP430_ISA_11, bfd_mach_msp11},
- {"msp430x1101",MSP430_ISA_110, bfd_mach_msp110},
- {"msp430x1111",MSP430_ISA_110, bfd_mach_msp110},
- {"msp430x1121",MSP430_ISA_110, bfd_mach_msp110},
- {"msp430x1122",MSP430_ISA_11, bfd_mach_msp110},
- {"msp430x1132",MSP430_ISA_11, bfd_mach_msp110},
-
- {"msp430x122", MSP430_ISA_12, bfd_mach_msp12},
- {"msp430x123", MSP430_ISA_12, bfd_mach_msp12},
- {"msp430x1222",MSP430_ISA_12, bfd_mach_msp12},
- {"msp430x1232",MSP430_ISA_12, bfd_mach_msp12},
-
- {"msp430x133", MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x135", MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x1331",MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x1351",MSP430_ISA_13, bfd_mach_msp13},
- {"msp430x147", MSP430_ISA_14, bfd_mach_msp14},
- {"msp430x148", MSP430_ISA_14, bfd_mach_msp14},
- {"msp430x149", MSP430_ISA_14, bfd_mach_msp14},
-
- {"msp430x155", MSP430_ISA_15, bfd_mach_msp15},
- {"msp430x156", MSP430_ISA_15, bfd_mach_msp15},
- {"msp430x157", MSP430_ISA_15, bfd_mach_msp15},
- {"msp430x167", MSP430_ISA_16, bfd_mach_msp16},
- {"msp430x168", MSP430_ISA_16, bfd_mach_msp16},
- {"msp430x169", MSP430_ISA_16, bfd_mach_msp16},
+ {"msp1", MSP430_ISA_11, bfd_mach_msp11},
+ {"msp2", MSP430_ISA_14, bfd_mach_msp14},
+ {"msp430x110", MSP430_ISA_11, bfd_mach_msp11},
+ {"msp430x112", MSP430_ISA_11, bfd_mach_msp11},
+ {"msp430x1101", MSP430_ISA_110, bfd_mach_msp110},
+ {"msp430x1111", MSP430_ISA_110, bfd_mach_msp110},
+ {"msp430x1121", MSP430_ISA_110, bfd_mach_msp110},
+ {"msp430x1122", MSP430_ISA_11, bfd_mach_msp110},
+ {"msp430x1132", MSP430_ISA_11, bfd_mach_msp110},
+
+ {"msp430x122", MSP430_ISA_12, bfd_mach_msp12},
+ {"msp430x123", MSP430_ISA_12, bfd_mach_msp12},
+ {"msp430x1222", MSP430_ISA_12, bfd_mach_msp12},
+ {"msp430x1232", MSP430_ISA_12, bfd_mach_msp12},
+
+ {"msp430x133", MSP430_ISA_13, bfd_mach_msp13},
+ {"msp430x135", MSP430_ISA_13, bfd_mach_msp13},
+ {"msp430x1331", MSP430_ISA_13, bfd_mach_msp13},
+ {"msp430x1351", MSP430_ISA_13, bfd_mach_msp13},
+ {"msp430x147", MSP430_ISA_14, bfd_mach_msp14},
+ {"msp430x148", MSP430_ISA_14, bfd_mach_msp14},
+ {"msp430x149", MSP430_ISA_14, bfd_mach_msp14},
+
+ {"msp430x155", MSP430_ISA_15, bfd_mach_msp15},
+ {"msp430x156", MSP430_ISA_15, bfd_mach_msp15},
+ {"msp430x157", MSP430_ISA_15, bfd_mach_msp15},
+ {"msp430x167", MSP430_ISA_16, bfd_mach_msp16},
+ {"msp430x168", MSP430_ISA_16, bfd_mach_msp16},
+ {"msp430x169", MSP430_ISA_16, bfd_mach_msp16},
{"msp430x1610", MSP430_ISA_16, bfd_mach_msp16},
{"msp430x1611", MSP430_ISA_16, bfd_mach_msp16},
{"msp430x1612", MSP430_ISA_16, bfd_mach_msp16},
- {"msp430x311", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x312", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x313", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x314", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x315", MSP430_ISA_31, bfd_mach_msp31},
- {"msp430x323", MSP430_ISA_32, bfd_mach_msp32},
- {"msp430x325", MSP430_ISA_32, bfd_mach_msp32},
- {"msp430x336", MSP430_ISA_33, bfd_mach_msp33},
- {"msp430x337", MSP430_ISA_33, bfd_mach_msp33},
-
- {"msp430x412", MSP430_ISA_41, bfd_mach_msp41},
- {"msp430x413", MSP430_ISA_41, bfd_mach_msp41},
- {"msp430x415", MSP430_ISA_41, bfd_mach_msp41},
- {"msp430x417", MSP430_ISA_41, bfd_mach_msp41},
+ {"msp430x311", MSP430_ISA_31, bfd_mach_msp31},
+ {"msp430x312", MSP430_ISA_31, bfd_mach_msp31},
+ {"msp430x313", MSP430_ISA_31, bfd_mach_msp31},
+ {"msp430x314", MSP430_ISA_31, bfd_mach_msp31},
+ {"msp430x315", MSP430_ISA_31, bfd_mach_msp31},
+ {"msp430x323", MSP430_ISA_32, bfd_mach_msp32},
+ {"msp430x325", MSP430_ISA_32, bfd_mach_msp32},
+ {"msp430x336", MSP430_ISA_33, bfd_mach_msp33},
+ {"msp430x337", MSP430_ISA_33, bfd_mach_msp33},
+
+ {"msp430x412", MSP430_ISA_41, bfd_mach_msp41},
+ {"msp430x413", MSP430_ISA_41, bfd_mach_msp41},
+ {"msp430x415", MSP430_ISA_41, bfd_mach_msp41},
+ {"msp430x417", MSP430_ISA_41, bfd_mach_msp41},
{"msp430xE423", MSP430_ISA_42, bfd_mach_msp42},
{"msp430xE425", MSP430_ISA_42, bfd_mach_msp42},
{"msp430xG438", MSP430_ISA_43, bfd_mach_msp43},
{"msp430xG439", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x435", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x436", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x437", MSP430_ISA_43, bfd_mach_msp43},
- {"msp430x447", MSP430_ISA_44, bfd_mach_msp44},
- {"msp430x448", MSP430_ISA_44, bfd_mach_msp44},
- {"msp430x449", MSP430_ISA_44, bfd_mach_msp44},
+ {"msp430x435", MSP430_ISA_43, bfd_mach_msp43},
+ {"msp430x436", MSP430_ISA_43, bfd_mach_msp43},
+ {"msp430x437", MSP430_ISA_43, bfd_mach_msp43},
+ {"msp430x447", MSP430_ISA_44, bfd_mach_msp44},
+ {"msp430x448", MSP430_ISA_44, bfd_mach_msp44},
+ {"msp430x449", MSP430_ISA_44, bfd_mach_msp44},
{NULL, 0, 0}
};
static struct mcu_type_s default_mcu =
{ "msp430x11", MSP430_ISA_11, bfd_mach_msp11 };
-static struct mcu_type_s *msp430_mcu = &default_mcu;
+static struct mcu_type_s * msp430_mcu = & default_mcu;
+
+/* Profiling capability:
+ It is a performance hit to use gcc's profiling approach for this tiny target.
+ Even more -- jtag hardware facility does not perform any profiling functions.
+ However we've got gdb's built-in simulator where we can do anything.
+ Therefore my suggestion is:
+
+ We define new section ".profiler" which holds all profiling information.
+ We define new pseudo operation .profiler which will instruct assembler to
+ add new profile entry to the object file. Profile should take place at the
+ present address.
+
+ Pseudo-op format:
+
+ .profiler flags,function_to_profile [, cycle_corrector, extra]
+
+ where 'flags' is a combination of the following chars:
+ s - function Start
+ x - function eXit
+ i - function is in Init section
+ f - function is in Fini section
+ l - Library call
+ c - libC standard call
+ d - stack value Demand (saved at run-time in simulator)
+ I - Interrupt service routine
+ P - Prologue start
+ p - Prologue end
+ E - Epilogue start
+ e - Epilogue end
+ j - long Jump/ sjlj unwind
+ a - an Arbitrary code fragment
+ t - exTra parameter saved (constant value like frame size)
+ '""' optional: "sil" == sil
+
+ function_to_profile - function's address
+ cycle_corrector - a value which should be added to the cycle
+ counter, zero if omitted
+ extra - some extra parameter, zero if omitted.
+
+ For example:
+ ------------------------------
+ .global fxx
+ .type fxx,@function
+ fxx:
+ .LFrameOffset_fxx=0x08
+ .profiler "scdP", fxx ; function entry.
+ ; we also demand stack value to be displayed
+ push r11
+ push r10
+ push r9
+ push r8
+ .profiler "cdp",fxx,0, .LFrameOffset_fxx ; check stack value at this point
+ ; (this is a prologue end)
+ ; note, that spare var filled with the farme size
+ mov r15,r8
+ ....
+ .profiler cdE,fxx ; check stack
+ pop r8
+ pop r9
+ pop r10
+ pop r11
+ .profiler xcde,fxx,3 ; exit adds 3 to the cycle counter
+ ret ; cause 'ret' insn takes 3 cycles
+ -------------------------------
+
+ This profiling approach does not produce any overhead and
+ absolutely harmless.
+ So, even profiled code can be uploaded to the MCU. */
+#define MSP430_PROFILER_FLAG_ENTRY 1 /* s */
+#define MSP430_PROFILER_FLAG_EXIT 2 /* x */
+#define MSP430_PROFILER_FLAG_INITSECT 4 /* i */
+#define MSP430_PROFILER_FLAG_FINISECT 8 /* f */
+#define MSP430_PROFILER_FLAG_LIBCALL 0x10 /* l */
+#define MSP430_PROFILER_FLAG_STDCALL 0x20 /* c */
+#define MSP430_PROFILER_FLAG_STACKDMD 0x40 /* d */
+#define MSP430_PROFILER_FLAG_ISR 0x80 /* I */
+#define MSP430_PROFILER_FLAG_PROLSTART 0x100 /* P */
+#define MSP430_PROFILER_FLAG_PROLEND 0x200 /* p */
+#define MSP430_PROFILER_FLAG_EPISTART 0x400 /* E */
+#define MSP430_PROFILER_FLAG_EPIEND 0x800 /* e */
+#define MSP430_PROFILER_FLAG_JUMP 0x1000 /* j */
+#define MSP430_PROFILER_FLAG_FRAGMENT 0x2000 /* a */
+#define MSP430_PROFILER_FLAG_EXTRA 0x4000 /* t */
+#define MSP430_PROFILER_FLAG_notyet 0x8000 /* ? */
-const pseudo_typeS md_pseudo_table[] =
+static int
+pow2value (int y)
{
- {"arch", msp430_set_arch, 0},
- {NULL, NULL, 0}
-};
+ int n = 0;
+ unsigned int x;
-#define OPTION_MMCU 'm'
+ x = y;
-const char *md_shortopts = "m:";
+ if (!x)
+ return 1;
-struct option md_longopts[] =
+ for (; x; x = x >> 1)
+ if (x & 1)
+ n++;
+
+ return n == 1;
+}
+
+/* Parse ordinary expression. */
+
+static char *
+parse_exp (char * s, expressionS * op)
{
- {"mmcu", required_argument, NULL, OPTION_MMCU},
- {NULL, no_argument, NULL, 0}
-};
+ input_line_pointer = s;
+ expression (op);
+ if (op->X_op == O_absent)
+ as_bad (_("missing operand"));
+ return input_line_pointer;
+}
-size_t md_longopts_size = sizeof (md_longopts);
+
+/* Delete spaces from s: X ( r 1 2) => X(r12). */
static void
-show_mcu_list (stream)
- FILE *stream;
+del_spaces (char * s)
{
- int i;
+ while (*s)
+ {
+ if (ISSPACE (*s))
+ {
+ char *m = s + 1;
- fprintf (stream, _("Known MCU names:\n"));
+ while (ISSPACE (*m) && *m)
+ m++;
+ memmove (s, m, strlen (m) + 1);
+ }
+ else
+ s++;
+ }
+}
- for (i = 0; mcu_types[i].name; i++)
- fprintf (stream, _("\t %s\n"), mcu_types[i].name);
+static inline char *
+skip_space (char * s)
+{
+ while (ISSPACE (*s))
+ ++s;
+ return s;
+}
- fprintf (stream, "\n");
+/* Extract one word from FROM and copy it to TO. Delimeters are ",;\n" */
+
+static char *
+extract_operand (char * from, char * to, int limit)
+{
+ int size = 0;
+
+ /* Drop leading whitespace. */
+ from = skip_space (from);
+
+ while (size < limit && *from)
+ {
+ *(to + size) = *from;
+ if (*from == ',' || *from == ';' || *from == '\n')
+ break;
+ from++;
+ size++;
+ }
+
+ *(to + size) = 0;
+ del_spaces (to);
+
+ from++;
+
+ return from;
}
-void
-md_show_usage (FILE *stream)
+static void
+msp430_profiler (int dummy ATTRIBUTE_UNUSED)
{
- fprintf (stream,
- _("MSP430 options:\n"
- " -mmcu=[msp430-name] select microcontroller type\n"
- " msp430x110 msp430x112\n"
- " msp430x1101 msp430x1111\n"
- " msp430x1121 msp430x1122 msp430x1132\n"
- " msp430x122 msp430x123\n"
- " msp430x1222 msp430x1232\n"
- " msp430x133 msp430x135\n"
- " msp430x1331 msp430x1351\n"
- " msp430x147 msp430x148 msp430x149\n"
- " msp430x155 msp430x156 msp430x157\n"
- " msp430x167 msp430x168 msp430x169\n"
- " msp430x1610 msp430x1611 msp430x1612\n"
- " msp430x311 msp430x312 msp430x313 msp430x314 msp430x315\n"
- " msp430x323 msp430x325\n"
- " msp430x336 msp430x337\n"
- " msp430x412 msp430x413 msp430x415 msp430x417\n"
- " msp430xE423 msp430xE425 msp430E427\n"
- " msp430xW423 msp430xW425 msp430W427\n"
- " msp430xG437 msp430xG438 msp430G439\n"
- " msp430x435 msp430x436 msp430x437\n"
- " msp430x447 msp430x448 msp430x449\n"));
+ char buffer[1024];
+ char f[32];
+ char * str = buffer;
+ char * flags = f;
+ int p_flags = 0;
+ char * halt;
+ int ops = 0;
+ int left;
+ char * s;
+ segT seg;
+ int subseg;
+ char * end = 0;
+ expressionS exp;
+ expressionS exp1;
+
+ s = input_line_pointer;
+ end = input_line_pointer;
+
+ while (*end && *end != '\n')
+ end++;
+
+ while (*s && *s != '\n')
+ {
+ if (*s == ',')
+ ops++;
+ s++;
+ }
- show_mcu_list (stream);
+ left = 3 - ops;
+
+ if (ops < 1)
+ {
+ as_bad (_(".profiler pseudo requires at least two operands."));
+ input_line_pointer = end;
+ return;
+ }
+
+ input_line_pointer = extract_operand (input_line_pointer, flags, 32);
+
+ while (*flags)
+ {
+ switch (*flags)
+ {
+ case '"':
+ break;
+ case 'a':
+ p_flags |= MSP430_PROFILER_FLAG_FRAGMENT;
+ break;
+ case 'j':
+ p_flags |= MSP430_PROFILER_FLAG_JUMP;
+ break;
+ case 'P':
+ p_flags |= MSP430_PROFILER_FLAG_PROLSTART;
+ break;
+ case 'p':
+ p_flags |= MSP430_PROFILER_FLAG_PROLEND;
+ break;
+ case 'E':
+ p_flags |= MSP430_PROFILER_FLAG_EPISTART;
+ break;
+ case 'e':
+ p_flags |= MSP430_PROFILER_FLAG_EPIEND;
+ break;
+ case 's':
+ p_flags |= MSP430_PROFILER_FLAG_ENTRY;
+ break;
+ case 'x':
+ p_flags |= MSP430_PROFILER_FLAG_EXIT;
+ break;
+ case 'i':
+ p_flags |= MSP430_PROFILER_FLAG_INITSECT;
+ break;
+ case 'f':
+ p_flags |= MSP430_PROFILER_FLAG_FINISECT;
+ break;
+ case 'l':
+ p_flags |= MSP430_PROFILER_FLAG_LIBCALL;
+ break;
+ case 'c':
+ p_flags |= MSP430_PROFILER_FLAG_STDCALL;
+ break;
+ case 'd':
+ p_flags |= MSP430_PROFILER_FLAG_STACKDMD;
+ break;
+ case 'I':
+ p_flags |= MSP430_PROFILER_FLAG_ISR;
+ break;
+ case 't':
+ p_flags |= MSP430_PROFILER_FLAG_EXTRA;
+ break;
+ default:
+ as_warn (_("unknown profiling flag - ignored."));
+ break;
+ }
+ flags++;
+ }
+
+ if (p_flags
+ && ( ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_ENTRY
+ | MSP430_PROFILER_FLAG_EXIT))
+ || ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_PROLSTART
+ | MSP430_PROFILER_FLAG_PROLEND
+ | MSP430_PROFILER_FLAG_EPISTART
+ | MSP430_PROFILER_FLAG_EPIEND))
+ || ! pow2value (p_flags & ( MSP430_PROFILER_FLAG_INITSECT
+ | MSP430_PROFILER_FLAG_FINISECT))))
+ {
+ as_bad (_("ambigious flags combination - '.profiler' directive ignored."));
+ input_line_pointer = end;
+ return;
+ }
+
+ /* Generate temp symbol which denotes current location. */
+ if (now_seg == absolute_section) /* Paranoja ? */
+ {
+ exp1.X_op = O_constant;
+ exp1.X_add_number = abs_section_offset;
+ as_warn (_("profiling in absolute section? Hm..."));
+ }
+ else
+ {
+ exp1.X_op = O_symbol;
+ exp1.X_add_symbol = symbol_temp_new_now ();
+ exp1.X_add_number = 0;
+ }
+
+ /* Generate a symbol which holds flags value. */
+ exp.X_op = O_constant;
+ exp.X_add_number = p_flags;
+
+ /* Save current section. */
+ seg = now_seg;
+ subseg = now_subseg;
+
+ /* Now go to .profiler section. */
+ obj_elf_change_section (".profiler", SHT_PROGBITS, 0, 0, 0, 0, 0);
+
+ /* Save flags. */
+ emit_expr (& exp, 2);
+
+ /* Save label value. */
+ emit_expr (& exp1, 2);
+
+ while (ops--)
+ {
+ /* Now get profiling info. */
+ halt = extract_operand (input_line_pointer, str, 1024);
+ /* Process like ".word xxx" directive. */
+ parse_exp (str, & exp);
+ emit_expr (& exp, 2);
+ input_line_pointer = halt;
+ }
+
+ /* Fill the rest with zeros. */
+ exp.X_op = O_constant;
+ exp.X_add_number = 0;
+ while (left--)
+ emit_expr (& exp, 2);
+
+ /* Return to current section. */
+ subseg_set (seg, subseg);
}
static char *
-extract_word (char *from, char *to, int limit)
+extract_word (char * from, char * to, int limit)
{
char *op_start;
char *op_end;
return op_end;
}
+#define OPTION_MMCU 'm'
+
static void
-msp430_set_arch (dummy)
- int dummy ATTRIBUTE_UNUSED;
+msp430_set_arch (int dummy ATTRIBUTE_UNUSED)
{
char *str = (char *) alloca (32); /* 32 for good measure. */
bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach);
}
+static void
+show_mcu_list (FILE * stream)
+{
+ int i;
+
+ fprintf (stream, _("Known MCU names:\n"));
+
+ for (i = 0; mcu_types[i].name; i++)
+ fprintf (stream, _("\t %s\n"), mcu_types[i].name);
+
+ fprintf (stream, "\n");
+}
+
int
-md_parse_option (c, arg)
- int c;
- char *arg;
+md_parse_option (int c, char * arg)
{
int i;
return 0;
}
-symbolS *
-md_undefined_symbol (name)
- char *name ATTRIBUTE_UNUSED;
-{
- return 0;
-}
-static inline char *
-skip_space (s)
- char *s;
+const pseudo_typeS md_pseudo_table[] =
{
- while (ISSPACE (*s))
- ++s;
- return s;
-}
+ {"arch", msp430_set_arch, 0},
+ {"profiler", msp430_profiler, 0},
+ {NULL, NULL, 0}
+};
-/* Delete spaces from s: X ( r 1 2) => X(r12). */
+const char *md_shortopts = "m:";
-static void
-del_spaces (s)
- char *s;
+struct option md_longopts[] =
{
- while (*s)
- {
- if (ISSPACE (*s))
- {
- char *m = s + 1;
-
- while (ISSPACE (*m) && *m)
- m++;
- memmove (s, m, strlen (m) + 1);
- }
- else
- s++;
- }
-}
+ {"mmcu", required_argument, NULL, OPTION_MMCU},
+ {NULL, no_argument, NULL, 0}
+};
-/* Extract one word from FROM and copy it to TO. Delimeters are ",;\n" */
+size_t md_longopts_size = sizeof (md_longopts);
-static char *
-extract_operand (char *from, char *to, int limit)
+void
+md_show_usage (FILE * stream)
{
- int size = 0;
-
- /* Drop leading whitespace. */
- from = skip_space (from);
-
- while (size < limit && *from)
- {
- *(to + size) = *from;
- if (*from == ',' || *from == ';' || *from == '\n')
- break;
- from++;
- size++;
- }
-
- *(to + size) = 0;
- del_spaces (to);
+ fprintf (stream,
+ _("MSP430 options:\n"
+ " -mmcu=[msp430-name] select microcontroller type\n"
+ " msp430x110 msp430x112\n"
+ " msp430x1101 msp430x1111\n"
+ " msp430x1121 msp430x1122 msp430x1132\n"
+ " msp430x122 msp430x123\n"
+ " msp430x1222 msp430x1232\n"
+ " msp430x133 msp430x135\n"
+ " msp430x1331 msp430x1351\n"
+ " msp430x147 msp430x148 msp430x149\n"
+ " msp430x155 msp430x156 msp430x157\n"
+ " msp430x167 msp430x168 msp430x169\n"
+ " msp430x1610 msp430x1611 msp430x1612\n"
+ " msp430x311 msp430x312 msp430x313 msp430x314 msp430x315\n"
+ " msp430x323 msp430x325\n"
+ " msp430x336 msp430x337\n"
+ " msp430x412 msp430x413 msp430x415 msp430x417\n"
+ " msp430xE423 msp430xE425 msp430E427\n"
+ " msp430xW423 msp430xW425 msp430W427\n"
+ " msp430xG437 msp430xG438 msp430G439\n"
+ " msp430x435 msp430x436 msp430x437\n"
+ " msp430x447 msp430x448 msp430x449\n"));
- from++;
+ show_mcu_list (stream);
+}
- return from;
+symbolS *
+md_undefined_symbol (char * name ATTRIBUTE_UNUSED)
+{
+ return 0;
}
static char *
-extract_cmd (char *from, char *to, int limit)
+extract_cmd (char * from, char * to, int limit)
{
int size = 0;
returned, or NULL on OK. */
char *
-md_atof (type, litP, sizeP)
- int type;
- char *litP;
- int *sizeP;
+md_atof (int type, char * litP, int * sizeP)
{
int prec;
LITTLENUM_TYPE words[4];
}
void
-md_convert_frag (abfd, sec, fragP)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- fragS *fragP ATTRIBUTE_UNUSED;
-{
- abort ();
-}
-
-void
-md_begin ()
+md_begin (void)
{
- struct msp430_opcode_s *opcode;
+ struct msp430_opcode_s * opcode;
msp430_hash = hash_new ();
for (opcode = msp430_opcodes; opcode->name; opcode++)
bfd_set_arch_mach (stdoutput, TARGET_ARCH, msp430_mcu->mach);
}
-void
-md_assemble (str)
- char *str;
+static int
+check_reg (char * t)
{
- struct msp430_opcode_s *opcode;
- char cmd[32];
- unsigned int i = 0;
-
- str = skip_space (str); /* Skip leading spaces. */
- str = extract_cmd (str, cmd, sizeof (cmd));
+ /* If this is a reg numb, str 't' must be a number from 0 - 15. */
- while (cmd[i] && i < sizeof (cmd))
- {
- char a = TOLOWER (cmd[i]);
- cmd[i] = a;
- i++;
- }
+ if (strlen (t) > 2 && *(t + 2) != '+')
+ return 1;
- if (!cmd[0])
+ while (*t)
{
- as_bad (_("can't find opcode "));
- return;
+ if ((*t < '0' || *t > '9') && *t != '+')
+ break;
+ t++;
}
- opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd);
-
- if (opcode == NULL)
- {
- as_bad (_("unknown opcode `%s'"), cmd);
- return;
- }
+ if (*t)
+ return 1;
- {
- char *__t = input_line_pointer;
- msp430_operands (opcode, str);
- input_line_pointer = __t;
- }
+ return 0;
}
-/* Parse instruction operands.
- Return binary opcode. */
-static unsigned int
-msp430_operands (opcode, line)
- struct msp430_opcode_s *opcode;
- char *line;
+static int
+msp430_srcoperand (struct msp430_operand_s * op,
+ char * l, int bin, int * imm_op)
{
- int bin = opcode->bin_opcode; /* opcode mask. */
- int __is;
- char l1[MAX_OP_LEN], l2[MAX_OP_LEN];
- char *frag;
- int where;
- struct msp430_operand_s op1, op2;
- int res = 0;
- static short ZEROS = 0;
- int byte_op, imm_op;
-
- /* opcode is the one from opcodes table
- line contains something like
- [.w] @r2+, 5(R1)
- or
- .b @r2+, 5(R1). */
+ char *__tl = l;
- /* Check if byte or word operation. */
- if (*line == '.' && TOLOWER (*(line + 1)) == 'b')
+ /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */
+ if (*l == '#')
{
- bin |= BYTE_OPERATION;
- byte_op = 1;
- }
- else
- byte_op = 0;
+ char *h = l;
+ int vshift = -1;
+ int rval = 0;
- /* skip .[bwBW]. */
- while (! ISSPACE (*line) && *line)
- line++;
+ /* Check if there is:
+ llo(x) - least significant 16 bits, x &= 0xffff
+ lhi(x) - x = (x >> 16) & 0xffff,
+ hlo(x) - x = (x >> 32) & 0xffff,
+ hhi(x) - x = (x >> 48) & 0xffff
+ The value _MUST_ be constant expression: #hlo(1231231231). */
- if (opcode->insn_opnumb && (!*line || *line == '\n'))
- {
- as_bad (_("instruction %s requires %d operand(s)"),
- opcode->name, opcode->insn_opnumb);
- return 0;
- }
+ *imm_op = 1;
- memset (l1, 0, sizeof (l1));
- memset (l2, 0, sizeof (l2));
- memset (&op1, 0, sizeof (op1));
- memset (&op2, 0, sizeof (op2));
+ if (strncasecmp (h, "#llo(", 5) == 0)
+ {
+ vshift = 0;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#lhi(", 5) == 0)
+ {
+ vshift = 1;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#hlo(", 5) == 0)
+ {
+ vshift = 2;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#hhi(", 5) == 0)
+ {
+ vshift = 3;
+ rval = 3;
+ }
+ else if (strncasecmp (h, "#lo(", 4) == 0)
+ {
+ vshift = 0;
+ rval = 2;
+ }
+ else if (strncasecmp (h, "#hi(", 4) == 0)
+ {
+ vshift = 1;
+ rval = 2;
+ }
- imm_op = 0;
+ op->reg = 0; /* Reg PC. */
+ op->am = 3;
+ op->ol = 1; /* Immediate will follow an instruction. */
+ __tl = h + 1 + rval;
+ op->mode = OP_EXP;
- switch (opcode->fmt)
- {
- case 0: /* Emulated. */
- switch (opcode->insn_opnumb)
+ parse_exp (__tl, &(op->exp));
+ if (op->exp.X_op == O_constant)
{
- case 0:
- /* Set/clear bits instructions. */
- __is = 2;
- frag = frag_more (__is);
- bfd_putl16 ((bfd_vma) bin, frag);
- break;
- case 1:
- /* Something which works with destination operand. */
- line = extract_operand (line, l1, sizeof (l1));
- res = msp430_dstoperand (&op1, l1, opcode->bin_opcode);
- if (res)
- break;
-
- bin |= (op1.reg | (op1.am << 7));
- __is = 1 + op1.ol;
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
+ int x = op->exp.X_add_number;
- if (op1.mode == OP_EXP)
+ if (vshift == 0)
{
- where += 2;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
-
- if (op1.reg)
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
+ x = x & 0xffff;
+ op->exp.X_add_number = x;
+ }
+ else if (vshift == 1)
+ {
+ x = (x >> 16) & 0xffff;
+ op->exp.X_add_number = x;
+ }
+ else if (vshift > 1)
+ {
+ if (x < 0)
+ op->exp.X_add_number = -1;
else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ op->exp.X_add_number = 0; /* Nothing left. */
+ x = op->exp.X_add_number;
}
- break;
-
- case 2:
- {
- /* Shift instruction. */
- line = extract_operand (line, l1, sizeof (l1));
- strncpy (l2, l1, sizeof (l2));
- l2[sizeof (l2) - 1] = '\0';
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
-
- if (res)
- break; /* An error occurred. All warnings were done before. */
-
- bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
-
- __is = 1 + op1.ol + op2.ol; /* insn size in words. */
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
-
- if (op1.mode == OP_EXP)
- {
- where += 2; /* Advance 'where' as we do not know _where_. */
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
-
- if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
-
- if (op2.mode == OP_EXP)
- {
- imm_op = 0;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
-
- if (op2.reg) /* Not PC relative. */
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
- }
- break;
- }
- case 3:
- /* Branch instruction => mov dst, r0. */
- line = extract_operand (line, l1, sizeof (l1));
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- if (res)
- break;
+ if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768)
+ {
+ as_bad (_("value %d out of range. Use #lo() or #hi()"), x);
+ return 1;
+ }
- byte_op = 0;
- imm_op = 0;
+ /* Now check constants. */
+ /* Substitute register mode with a constant generator if applicable. */
- bin |= ((op1.reg << 8) | (op1.am << 4));
- __is = 1 + op1.ol;
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
+ x = (short) x; /* Extend sign. */
- if (op1.mode == OP_EXP)
+ if (x == 0)
{
- where += 2;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
-
- if (op1.reg || (op1.reg == 0 && op1.am == 3))
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ op->reg = 3;
+ op->am = 0;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 1)
+ {
+ op->reg = 3;
+ op->am = 1;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 2)
+ {
+ op->reg = 3;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == -1)
+ {
+ op->reg = 3;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 4)
+ {
+#ifdef PUSH_1X_WORKAROUND
+ if (bin == 0x1200)
+ {
+ /* Remove warning as confusing.
+ as_warn(_("Hardware push bug workaround")); */
+ }
+ else
+#endif
+ {
+ op->reg = 2;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ }
+ else if (x == 8)
+ {
+#ifdef PUSH_1X_WORKAROUND
+ if (bin == 0x1200)
+ {
+ /* Remove warning as confusing.
+ as_warn(_("Hardware push bug workaround")); */
+ }
+ else
+#endif
+ {
+ op->reg = 2;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
}
- break;
}
- break;
-
- case 1: /* Format 1, double operand. */
- line = extract_operand (line, l1, sizeof (l1));
- line = extract_operand (line, l2, sizeof (l2));
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
+ else if (op->exp.X_op == O_symbol)
+ {
+ op->mode = OP_EXP;
+ }
+ else if (op->exp.X_op == O_big)
+ {
+ short x;
+ if (vshift != -1)
+ {
+ op->exp.X_op = O_constant;
+ op->exp.X_add_number = 0xffff & generic_bignum[vshift];
+ x = op->exp.X_add_number;
+ }
+ else
+ {
+ as_bad (_
+ ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "),
+ l);
+ return 1;
+ }
- if (res)
- break; /* Error occurred. All warnings were done before. */
+ if (x == 0)
+ {
+ op->reg = 3;
+ op->am = 0;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 1)
+ {
+ op->reg = 3;
+ op->am = 1;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 2)
+ {
+ op->reg = 3;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == -1)
+ {
+ op->reg = 3;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 4)
+ {
+ op->reg = 2;
+ op->am = 2;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ else if (x == 8)
+ {
+ op->reg = 2;
+ op->am = 3;
+ op->ol = 0;
+ op->mode = OP_REG;
+ }
+ }
+ /* Redudant (yet) check. */
+ else if (op->exp.X_op == O_register)
+ as_bad
+ (_("Registers cannot be used within immediate expression [%s]"), l);
+ else
+ as_bad (_("unknown operand %s"), l);
- bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
+ return 0;
+ }
- __is = 1 + op1.ol + op2.ol; /* insn size in words. */
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
+ /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */
+ if (*l == '&')
+ {
+ char *h = l;
- if (op1.mode == OP_EXP)
+ op->reg = 2; /* reg 2 in absolute addr mode. */
+ op->am = 1; /* mode As == 01 bin. */
+ op->ol = 1; /* Immediate value followed by instruction. */
+ __tl = h + 1;
+ parse_exp (__tl, &(op->exp));
+ op->mode = OP_EXP;
+ if (op->exp.X_op == O_constant)
{
- where += 2; /* Advance where as we do not know _where_. */
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+ int x = op->exp.X_add_number;
- if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ if (x > 65535 || x < -32768)
+ {
+ as_bad (_("value out of range: %d"), x);
+ return 1;
+ }
}
-
- if (op2.mode == OP_EXP)
+ else if (op->exp.X_op == O_symbol)
+ ;
+ else
{
- imm_op = 0;
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
-
- if (op2.reg) /* Not PC relative. */
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), FALSE, CHECK_RELOC_MSP430);
+ /* Redudant (yet) check. */
+ if (op->exp.X_op == O_register)
+ as_bad
+ (_("Registers cannot be used within absolute expression [%s]"), l);
else
- fix_new_exp (frag_now, where + 2, 2,
- &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ as_bad (_("unknown expression in operand %s"), l);
+ return 1;
}
- break;
+ return 0;
+ }
- case 2: /* Single-operand mostly instr. */
- if (opcode->insn_opnumb == 0)
+ /* Check if indirect register mode @Rn / postincrement @Rn+. */
+ if (*l == '@')
+ {
+ char *t = l;
+ char *m = strchr (l, '+');
+
+ if (t != l)
{
- /* reti instruction. */
- frag = frag_more (2);
- bfd_putl16 ((bfd_vma) bin, frag);
- break;
+ as_bad (_("unknown addressing mode %s"), l);
+ return 1;
}
- line = extract_operand (line, l1, sizeof (l1));
- res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
- if (res)
- break; /* Error in operand. */
+ t++;
+ if (*t != 'r' && *t != 'R')
+ {
+ as_bad (_("unknown addressing mode %s"), l);
+ return 1;
+ }
- bin |= op1.reg | (op1.am << 4);
- __is = 1 + op1.ol;
- frag = frag_more (2 * __is);
- where = frag - frag_now->fr_literal;
- bfd_putl16 ((bfd_vma) bin, frag);
+ t++; /* Points to the reg value. */
- if (op1.mode == OP_EXP)
+ if (check_reg (t))
{
- bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
-
- if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
- fix_new_exp (frag_now, where + 2, 2,
- &(op1.exp), FALSE, CHECK_RELOC_MSP430);
- else
- fix_new_exp (frag_now, where + 2, 2,
- &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ as_bad (_("Bad register name r%s"), t);
+ return 1;
}
- break;
- case 3: /* Conditional jumps instructions. */
- line = extract_operand (line, l1, sizeof (l1));
- /* l1 is a label. */
- if (l1[0])
+ op->mode = OP_REG;
+ op->am = m ? 3 : 2;
+ op->ol = 0;
+ if (m)
+ *m = 0; /* strip '+' */
+ op->reg = atoi (t);
+ if (op->reg < 0 || op->reg > 15)
{
- char *m = l1;
- expressionS exp;
-
- if (*m == '$')
- m++;
+ as_bad (_("MSP430 does not have %d registers"), op->reg);
+ return 1;
+ }
- parse_exp (m, &exp);
- frag = frag_more (2); /* Instr size is 1 word. */
+ return 0;
+ }
- /* In order to handle something like:
+ /* Check if register indexed X(Rn). */
+ do
+ {
+ char *h = strrchr (l, '(');
+ char *m = strrchr (l, ')');
+ char *t;
- and #0x8000, r5
- tst r5
- jz 4 ; skip next 4 bytes
- inv r5
- inc r5
- nop ; will jump here if r5 positive or zero
+ *imm_op = 1;
- jCOND -n ;assumes jump n bytes backward:
+ if (!h)
+ break;
+ if (!m)
+ {
+ as_bad (_("')' required"));
+ return 1;
+ }
- mov r5,r6
- jmp -2
+ t = h;
+ op->am = 1;
+ op->ol = 1;
+ /* Extract a register. */
+ t++; /* Advance pointer. */
- is equal to:
- lab:
- mov r5,r6
- jmp lab
+ if (*t != 'r' && *t != 'R')
+ {
+ as_bad (_
+ ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"),
+ l);
+ return 1;
+ }
+ t++;
- jCOND $n ; jump from PC in either direction. */
+ op->reg = *t - '0';
+ if (op->reg > 9 || op->reg < 0)
+ {
+ as_bad (_("unknown operator (r%s substituded as a register name"),
+ t);
+ return 1;
+ }
+ t++;
+ if (*t != ')')
+ {
+ op->reg = op->reg * 10;
+ op->reg += *t - '0';
- if (exp.X_op == O_constant)
+ if (op->reg > 15)
{
- int x = exp.X_add_number;
-
- if (x & 1)
- {
- as_warn (_("Even number required. Rounded to %d"), x + 1);
- x++;
- }
-
- if ((*l1 == '$' && x > 0) || x < 0)
- x -= 2;
-
- x >>= 1;
-
- if (x > 512 || x < -511)
- {
- as_bad (_("Wrong displacement %d"), x << 1);
- break;
- }
-
- bin |= x & 0x3ff;
- bfd_putl16 ((bfd_vma) bin, frag);
+ as_bad (_("unknown operator %s"), l);
+ return 1;
}
- else if (exp.X_op == O_symbol && *l1 != '$')
+ if (op->reg == 2)
{
- where = frag - frag_now->fr_literal;
- fix_new_exp (frag_now, where, 2,
- &exp, TRUE, BFD_RELOC_MSP430_10_PCREL);
+ as_bad (_("r2 should not be used in indexed addressing mode"));
+ return 1;
+ }
- bfd_putl16 ((bfd_vma) bin, frag);
+ if (*(t + 1) != ')')
+ {
+ as_bad (_("unknown operator %s"), l);
+ return 1;
}
- else if (*l1 == '$')
+ }
+
+ /* Extract constant. */
+ __tl = l;
+ *h = 0;
+ op->mode = OP_EXP;
+ parse_exp (__tl, &(op->exp));
+ if (op->exp.X_op == O_constant)
+ {
+ int x = op->exp.X_add_number;
+
+ if (x > 65535 || x < -32768)
{
- as_bad (_("instruction requires label sans '$'"));
- break;
+ as_bad (_("value out of range: %d"), x);
+ return 1;
}
- else
+
+ if (x == 0)
{
- as_bad (_
- ("instruction requires label or value in range -511:512"));
- break;
+ op->mode = OP_REG;
+ op->am = 2;
+ op->ol = 0;
+ return 0;
}
}
+ else if (op->exp.X_op == O_symbol)
+ ;
else
{
- as_bad (_("instruction requires label"));
- break;
+ /* Redudant (yet) check. */
+ if (op->exp.X_op == O_register)
+ as_bad
+ (_("Registers cannot be used as a prefix of indexed expression [%s]"), l);
+ else
+ as_bad (_("unknown expression in operand %s"), l);
+ return 1;
}
- break;
- default:
- as_bad (_("Ilegal instruction or not implmented opcode."));
+ return 0;
}
+ while (0);
- input_line_pointer = line;
- return 0;
+ /* Register mode 'mov r1,r2'. */
+ do
+ {
+ char *t = l;
+
+ /* Operand should be a register. */
+ if (*t == 'r' || *t == 'R')
+ {
+ int x = atoi (t + 1);
+
+ if (check_reg (t + 1))
+ break;
+
+ if (x < 0 || x > 15)
+ break; /* Symbolic mode. */
+
+ op->mode = OP_REG;
+ op->am = 0;
+ op->ol = 0;
+ op->reg = x;
+ return 0;
+ }
+ }
+ while (0);
+
+ /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */
+ do
+ {
+#if 0 /* Allow expression in operand like 'a+123*(1|2)'. */
+ char *t = l;
+
+ __tl = l;
+
+ while (*t)
+ {
+ /* alpha/number underline dot for labels. */
+ if (! ISALNUM (*t) && *t != '_' && *t != '.')
+ {
+ as_bad (_("unknown operand %s"), l);
+ return 1;
+ }
+ t++;
+ }
+#endif
+ op->mode = OP_EXP;
+ op->reg = 0; /* PC relative... be careful. */
+ op->am = 1;
+ op->ol = 1;
+ __tl = l;
+ parse_exp (__tl, &(op->exp));
+ return 0;
+ }
+ while (0);
+
+ /* Unreachable. */
+ as_bad (_("unknown addressing mode for operand %s"), l);
+ return 1;
}
+
static int
-msp430_dstoperand (op, l, bin)
- struct msp430_operand_s *op;
- char *l;
- int bin;
+msp430_dstoperand (struct msp430_operand_s * op, char * l, int bin)
{
int dummy;
- int ret = msp430_srcoperand (op, l, bin, &dummy);
+ int ret = msp430_srcoperand (op, l, bin, & dummy);
+
if (ret)
return ret;
op->am = 1;
op->ol = 1;
parse_exp (__tl, &(op->exp));
+
if (op->exp.X_op != O_constant || op->exp.X_add_number != 0)
{
as_bad (_("Internal bug. Try to use 0(r%d) instead of @r%d"),
}
-static int
-check_reg (t)
- char *t;
+/* Parse instruction operands.
+ Return binary opcode. */
+
+static unsigned int
+msp430_operands (struct msp430_opcode_s * opcode, char * line)
{
- /* If this is a reg numb, str 't' must be a number from 0 - 15. */
+ int bin = opcode->bin_opcode; /* Opcode mask. */
+ int __is;
+ char l1[MAX_OP_LEN], l2[MAX_OP_LEN];
+ char *frag;
+ int where;
+ struct msp430_operand_s op1, op2;
+ int res = 0;
+ static short ZEROS = 0;
+ int byte_op, imm_op;
- if (strlen (t) > 2 && *(t + 2) != '+')
- return 1;
+ /* Opcode is the one from opcodes table
+ line contains something like
+ [.w] @r2+, 5(R1)
+ or
+ .b @r2+, 5(R1). */
- while (*t)
+ /* Check if byte or word operation. */
+ if (*line == '.' && TOLOWER (*(line + 1)) == 'b')
{
- if ((*t < '0' || *t > '9') && *t != '+')
- break;
- t++;
+ bin |= BYTE_OPERATION;
+ byte_op = 1;
}
+ else
+ byte_op = 0;
- if (*t)
- return 1;
-
- return 0;
-}
-
-
-static int
-msp430_srcoperand (op, l, bin, imm_op)
- struct msp430_operand_s *op;
- char *l;
- int bin;
- int *imm_op;
-{
- char *__tl = l;
+ /* skip .[bwBW]. */
+ while (! ISSPACE (*line) && *line)
+ line++;
- /* Check if an immediate #VALUE. The hash sign should be only at the beginning! */
- if (*l == '#')
+ if (opcode->insn_opnumb && (!*line || *line == '\n'))
{
- char *h = l;
- int vshift = -1;
- int rval = 0;
+ as_bad (_("instruction %s requires %d operand(s)"),
+ opcode->name, opcode->insn_opnumb);
+ return 0;
+ }
- /* Check if there is:
- llo(x) - least significant 16 bits, x &= 0xffff
- lhi(x) - x = (x >> 16) & 0xffff,
- hlo(x) - x = (x >> 32) & 0xffff,
- hhi(x) - x = (x >> 48) & 0xffff
- The value _MUST_ be constant expression: #hlo(1231231231). */
+ memset (l1, 0, sizeof (l1));
+ memset (l2, 0, sizeof (l2));
+ memset (&op1, 0, sizeof (op1));
+ memset (&op2, 0, sizeof (op2));
- *imm_op = 1;
+ imm_op = 0;
- if (strncasecmp (h, "#llo(", 5) == 0)
- {
- vshift = 0;
- rval = 3;
- }
- else if (strncasecmp (h, "#lhi(", 5) == 0)
- {
- vshift = 1;
- rval = 3;
- }
- else if (strncasecmp (h, "#hlo(", 5) == 0)
- {
- vshift = 2;
- rval = 3;
- }
- else if (strncasecmp (h, "#hhi(", 5) == 0)
- {
- vshift = 3;
- rval = 3;
- }
- else if (strncasecmp (h, "#lo(", 4) == 0)
- {
- vshift = 0;
- rval = 2;
- }
- else if (strncasecmp (h, "#hi(", 4) == 0)
+ switch (opcode->fmt)
+ {
+ case 0: /* Emulated. */
+ switch (opcode->insn_opnumb)
{
- vshift = 1;
- rval = 2;
- }
+ case 0:
+ /* Set/clear bits instructions. */
+ __is = 2;
+ frag = frag_more (__is);
+ bfd_putl16 ((bfd_vma) bin, frag);
+ break;
+ case 1:
+ /* Something which works with destination operand. */
+ line = extract_operand (line, l1, sizeof (l1));
+ res = msp430_dstoperand (&op1, l1, opcode->bin_opcode);
+ if (res)
+ break;
- op->reg = 0; /* Reg PC. */
- op->am = 3;
- op->ol = 1; /* Immediate will follow an instruction. */
- __tl = h + 1 + rval;
- op->mode = OP_EXP;
- parse_exp (__tl, &(op->exp));
- if (op->exp.X_op == O_constant)
- {
- int x = op->exp.X_add_number;
+ bin |= (op1.reg | (op1.am << 7));
+ __is = 1 + op1.ol;
+ frag = frag_more (2 * __is);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
- if (vshift == 0)
- {
- x = x & 0xffff;
- op->exp.X_add_number = x;
- }
- else if (vshift == 1)
- {
- x = (x >> 16) & 0xffff;
- op->exp.X_add_number = x;
- }
- else if (vshift > 1)
+ if (op1.mode == OP_EXP)
{
- if (x < 0)
- op->exp.X_add_number = -1;
+ where += 2;
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+
+ if (op1.reg)
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430);
else
- op->exp.X_add_number = 0; /* Nothing left. */
- x = op->exp.X_add_number;
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
}
+ break;
- if (op->exp.X_add_number > 65535 || op->exp.X_add_number < -32768)
- {
- as_bad (_("value %ld out of range. Use #lo() or #hi()"), x);
- return 1;
- }
+ case 2:
+ {
+ /* Shift instruction. */
+ line = extract_operand (line, l1, sizeof (l1));
+ strncpy (l2, l1, sizeof (l2));
+ l2[sizeof (l2) - 1] = '\0';
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
+ res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
- /* Now check constants. */
- /* Substitute register mode with a constant generator if applicable. */
+ if (res)
+ break; /* An error occurred. All warnings were done before. */
- x = (short) x; /* Extend sign. */
+ bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
- if (x == 0)
- {
- op->reg = 3;
- op->am = 0;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 1)
- {
- op->reg = 3;
- op->am = 1;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 2)
- {
- op->reg = 3;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == -1)
- {
- op->reg = 3;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 4)
- {
-#ifdef PUSH_1X_WORKAROUND
- if (bin == 0x1200)
- {
- /* Remove warning as confusing.
- as_warn(_("Hardware push bug workaround")); */
- }
- else
-#endif
- {
- op->reg = 2;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
- }
- }
- else if (x == 8)
+ __is = 1 + op1.ol + op2.ol; /* insn size in words. */
+ frag = frag_more (2 * __is);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+
+ if (op1.mode == OP_EXP)
+ {
+ where += 2; /* Advance 'where' as we do not know _where_. */
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+
+ if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430);
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+
+ if (op2.mode == OP_EXP)
+ {
+ imm_op = 0;
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
+
+ if (op2.reg) /* Not PC relative. */
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op2.exp), FALSE, CHECK_RELOC_MSP430);
+ else
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
+ }
+ break;
+ }
+ case 3:
+ /* Branch instruction => mov dst, r0. */
+ line = extract_operand (line, l1, sizeof (l1));
+
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
+ if (res)
+ break;
+
+ byte_op = 0;
+ imm_op = 0;
+
+ bin |= ((op1.reg << 8) | (op1.am << 4));
+ __is = 1 + op1.ol;
+ frag = frag_more (2 * __is);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+
+ if (op1.mode == OP_EXP)
{
-#ifdef PUSH_1X_WORKAROUND
- if (bin == 0x1200)
- {
- /* Remove warning as confusing.
- as_warn(_("Hardware push bug workaround")); */
- }
+ where += 2;
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+
+ if (op1.reg || (op1.reg == 0 && op1.am == 3))
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430);
else
-#endif
- {
- op->reg = 2;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
- }
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
}
+ break;
}
- else if (op->exp.X_op == O_symbol)
- {
- op->mode = OP_EXP;
- }
- else if (op->exp.X_op == O_big)
- {
- short x;
- if (vshift != -1)
- {
- op->exp.X_op = O_constant;
- op->exp.X_add_number = 0xffff & generic_bignum[vshift];
- x = op->exp.X_add_number;
- }
- else
- {
- as_bad (_
- ("unknown expression in operand %s. use #llo() #lhi() #hlo() #hhi() "),
- l);
- return 1;
- }
+ break;
- if (x == 0)
- {
- op->reg = 3;
- op->am = 0;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 1)
- {
- op->reg = 3;
- op->am = 1;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 2)
- {
- op->reg = 3;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == -1)
- {
- op->reg = 3;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 4)
- {
- op->reg = 2;
- op->am = 2;
- op->ol = 0;
- op->mode = OP_REG;
- }
- else if (x == 8)
- {
- op->reg = 2;
- op->am = 3;
- op->ol = 0;
- op->mode = OP_REG;
- }
- }
- else
- {
- as_bad (_("unknown operand %s"), l);
- }
- return 0;
- }
+ case 1: /* Format 1, double operand. */
+ line = extract_operand (line, l1, sizeof (l1));
+ line = extract_operand (line, l2, sizeof (l2));
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
+ res += msp430_dstoperand (&op2, l2, opcode->bin_opcode);
- /* Check if absolute &VALUE (assume that we can construct something like ((a&b)<<7 + 25). */
- if (*l == '&')
- {
- char *h = l;
+ if (res)
+ break; /* Error occurred. All warnings were done before. */
- op->reg = 2; /* reg 2 in absolute addr mode. */
- op->am = 1; /* mode As == 01 bin. */
- op->ol = 1; /* Immediate value followed by instruction. */
- __tl = h + 1;
- parse_exp (__tl, &(op->exp));
- op->mode = OP_EXP;
- if (op->exp.X_op == O_constant)
+ bin |= (op2.reg | (op1.reg << 8) | (op1.am << 4) | (op2.am << 7));
+
+ __is = 1 + op1.ol + op2.ol; /* insn size in words. */
+ frag = frag_more (2 * __is);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+
+ if (op1.mode == OP_EXP)
{
- int x = op->exp.X_add_number;
- if (x > 65535 || x < -32768)
- {
- as_bad (_("value out of range: %d"), x);
- return 1;
- }
+ where += 2; /* Advance where as we do not know _where_. */
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+
+ if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430);
+ else
+ fix_new_exp (frag_now, where, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
}
- else if (op->exp.X_op == O_symbol)
+
+ if (op2.mode == OP_EXP)
{
+ imm_op = 0;
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2 + ((__is == 3) ? 2 : 0));
+
+ if (op2.reg) /* Not PC relative. */
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op2.exp), FALSE, CHECK_RELOC_MSP430);
+ else
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op2.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
}
- else
+ break;
+
+ case 2: /* Single-operand mostly instr. */
+ if (opcode->insn_opnumb == 0)
{
- as_bad (_("unknown expression in operand %s"), l);
- return 1;
+ /* reti instruction. */
+ frag = frag_more (2);
+ bfd_putl16 ((bfd_vma) bin, frag);
+ break;
}
- return 0;
- }
- /* Check if indirect register mode @Rn / postincrement @Rn+. */
- if (*l == '@')
- {
- char *t = l;
- char *m = strchr (l, '+');
+ line = extract_operand (line, l1, sizeof (l1));
+ res = msp430_srcoperand (&op1, l1, opcode->bin_opcode, &imm_op);
+ if (res)
+ break; /* Error in operand. */
- if (t != l)
+ bin |= op1.reg | (op1.am << 4);
+ __is = 1 + op1.ol;
+ frag = frag_more (2 * __is);
+ where = frag - frag_now->fr_literal;
+ bfd_putl16 ((bfd_vma) bin, frag);
+
+ if (op1.mode == OP_EXP)
{
- as_bad (_("unknown addressing mode %s"), l);
- return 1;
+ bfd_putl16 ((bfd_vma) ZEROS, frag + 2);
+
+ if (op1.reg || (op1.reg == 0 && op1.am == 3)) /* Not PC relative. */
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op1.exp), FALSE, CHECK_RELOC_MSP430);
+ else
+ fix_new_exp (frag_now, where + 2, 2,
+ &(op1.exp), TRUE, CHECK_RELOC_MSP430_PCREL);
}
+ break;
- t++;
- if (*t != 'r' && *t != 'R')
+ case 3: /* Conditional jumps instructions. */
+ line = extract_operand (line, l1, sizeof (l1));
+ /* l1 is a label. */
+ if (l1[0])
{
- as_bad (_("unknown addressing mode %s"), l);
- return 1;
- }
+ char *m = l1;
+ expressionS exp;
- t++; /* Points to the reg value. */
+ if (*m == '$')
+ m++;
- if (check_reg (t))
- {
- as_bad (_("Bad register name r%s"), t);
- return 1;
- }
+ parse_exp (m, &exp);
+ frag = frag_more (2); /* Instr size is 1 word. */
- op->mode = OP_REG;
- op->am = m ? 3 : 2;
- op->ol = 0;
- if (m)
- *m = 0; /* strip '+' */
- op->reg = atoi (t);
- if (op->reg < 0 || op->reg > 15)
- {
- as_bad (_("MSP430 does not have %d registers"), op->reg);
- return 1;
- }
+ /* In order to handle something like:
- return 0;
- }
+ and #0x8000, r5
+ tst r5
+ jz 4 ; skip next 4 bytes
+ inv r5
+ inc r5
+ nop ; will jump here if r5 positive or zero
- /* Check if register indexed X(Rn). */
- do
- {
- char *h = strrchr (l, '(');
- char *m = strrchr (l, ')');
- char *t;
+ jCOND -n ;assumes jump n bytes backward:
- *imm_op = 1;
+ mov r5,r6
+ jmp -2
- if (!h)
- break;
- if (!m)
- {
- as_bad (_("')' required"));
- return 1;
- }
+ is equal to:
+ lab:
+ mov r5,r6
+ jmp lab
+
+ jCOND $n ; jump from PC in either direction. */
- t = h;
- op->am = 1;
- op->ol = 1;
- /* Extract a register. */
- t++; /* Advance pointer. */
+ if (exp.X_op == O_constant)
+ {
+ int x = exp.X_add_number;
- if (*t != 'r' && *t != 'R')
- {
- as_bad (_
- ("unknown operator %s. Did you mean X(Rn) or #[hl][hl][oi](CONST) ?"),
- l);
- return 1;
- }
- t++;
+ if (x & 1)
+ {
+ as_warn (_("Even number required. Rounded to %d"), x + 1);
+ x++;
+ }
- op->reg = *t - '0';
- if (op->reg > 9 || op->reg < 0)
- {
- as_bad (_("unknown operator (r%s substituded as a register name"),
- t);
- return 1;
- }
- t++;
- if (*t != ')')
- {
- op->reg = op->reg * 10;
- op->reg += *t - '0';
+ if ((*l1 == '$' && x > 0) || x < 0)
+ x -= 2;
- if (op->reg > 15)
+ x >>= 1;
+
+ if (x > 512 || x < -511)
+ {
+ as_bad (_("Wrong displacement %d"), x << 1);
+ break;
+ }
+
+ bin |= x & 0x3ff;
+ bfd_putl16 ((bfd_vma) bin, frag);
+ }
+ else if (exp.X_op == O_symbol && *l1 != '$')
{
- as_bad (_("unknown operator %s"), l);
- return 1;
+ where = frag - frag_now->fr_literal;
+ fix_new_exp (frag_now, where, 2,
+ &exp, TRUE, BFD_RELOC_MSP430_10_PCREL);
+
+ bfd_putl16 ((bfd_vma) bin, frag);
}
- if (op->reg == 2)
+ else if (*l1 == '$')
{
- as_bad (_("r2 should not be used in indexed addressing mode"));
- return 1;
+ as_bad (_("instruction requires label sans '$'"));
+ break;
}
-
- if (*(t + 1) != ')')
+ else
{
- as_bad (_("unknown operator %s"), l);
- return 1;
+ as_bad (_
+ ("instruction requires label or value in range -511:512"));
+ break;
}
}
+ else
+ {
+ as_bad (_("instruction requires label"));
+ break;
+ }
+ break;
- /* Extract constant. */
- __tl = l;
- *h = 0;
- op->mode = OP_EXP;
- parse_exp (__tl, &(op->exp));
- if (op->exp.X_op == O_constant)
+ case 4: /* Extended jumps. */
+ line = extract_operand (line, l1, sizeof (l1));
+ if (l1[0])
{
- int x = op->exp.X_add_number;
+ char *m = l1;
+ expressionS exp;
- if (x > 65535 || x < -32768)
- {
- as_bad (_("value out of range: %d"), x);
- return 1;
- }
+ /* Ignore absolute addressing. make it PC relative anyway. */
+ if (*m == '#' || *m == '$')
+ m++;
- if (x == 0)
+ parse_exp (m, & exp);
+ if (exp.X_op == O_symbol)
{
- op->mode = OP_REG;
- op->am = 2;
- op->ol = 0;
- return 0;
+ /* Relaxation required. */
+ struct rcodes_s rc = msp430_rcodes[opcode->insn_opnumb];
+
+ frag = frag_more (8);
+ bfd_putl16 ((bfd_vma) rc.sop, frag);
+ frag = frag_variant (rs_machine_dependent, 8, 2,
+ ENCODE_RELAX (rc.lpos, STATE_BITS10), /* Wild guess. */
+ exp.X_add_symbol,
+ 0, /* Offset is zero if jump dist less than 1K. */
+ (char *) frag);
+ break;
}
}
- else if (op->exp.X_op == O_symbol)
- {
- }
- else
+
+ as_bad (_("instruction requires label"));
+ break;
+
+ case 5: /* Emulated extended branches. */
+ line = extract_operand (line, l1, sizeof (l1));
+ if (l1[0])
{
- as_bad (_("unknown expression in operand %s"), l);
- return 1;
+ char * m = l1;
+ expressionS exp;
+
+ /* Ignore absolute addressing. make it PC relative anyway. */
+ if (*m == '#' || *m == '$')
+ m++;
+
+ parse_exp (m, & exp);
+ if (exp.X_op == O_symbol)
+ {
+ /* Relaxation required. */
+ struct hcodes_s hc = msp430_hcodes[opcode->insn_opnumb];
+
+ frag = frag_more (8);
+ bfd_putl16 ((bfd_vma) hc.op0, frag);
+ bfd_putl16 ((bfd_vma) hc.op1, frag+2);
+ frag = frag_variant (rs_machine_dependent, 8, 2,
+ ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_BITS10), /* Wild guess. */
+ exp.X_add_symbol,
+ 0, /* Offset is zero if jump dist less than 1K. */
+ (char *) frag);
+ break;
+ }
}
- return 0;
- }
- while (0);
+ as_bad (_("instruction requires label"));
+ break;
- /* Register mode 'mov r1,r2'. */
- do
- {
- char *t = l;
+ default:
+ as_bad (_("Ilegal instruction or not implmented opcode."));
+ }
- /* Operand should be a register. */
- if (*t == 'r' || *t == 'R')
- {
- int x = atoi (t + 1);
+ input_line_pointer = line;
+ return 0;
+}
- if (check_reg (t + 1))
- break;
+void
+md_assemble (char * str)
+{
+ struct msp430_opcode_s * opcode;
+ char cmd[32];
+ unsigned int i = 0;
- if (x < 0 || x > 15)
- break; /* Symbolic mode. */
+ str = skip_space (str); /* Skip leading spaces. */
+ str = extract_cmd (str, cmd, sizeof (cmd));
- op->mode = OP_REG;
- op->am = 0;
- op->ol = 0;
- op->reg = x;
- return 0;
- }
+ while (cmd[i] && i < sizeof (cmd))
+ {
+ char a = TOLOWER (cmd[i]);
+ cmd[i] = a;
+ i++;
}
- while (0);
- /* Symbolic mode 'mov a, b' == 'mov x(pc), y(pc)'. */
- do
+ if (!cmd[0])
{
- char *t = l;
-
- __tl = l;
+ as_bad (_("can't find opcode "));
+ return;
+ }
- while (*t)
- {
- /* alpha/number underline dot for labels. */
- if (! ISALNUM (*t) && *t != '_' && *t != '.')
- {
- as_bad (_("unknown operand %s"), l);
- return 1;
- }
- t++;
- }
+ opcode = (struct msp430_opcode_s *) hash_find (msp430_hash, cmd);
- op->mode = OP_EXP;
- op->reg = 0; /* PC relative... be careful. */
- op->am = 1;
- op->ol = 1;
- __tl = l;
- parse_exp (__tl, &(op->exp));
- return 0;
+ if (opcode == NULL)
+ {
+ as_bad (_("unknown opcode `%s'"), cmd);
+ return;
}
- while (0);
- /* Unreachable. */
- as_bad (_("unknown addressing mode for operand %s"), l);
- return 1;
-}
+ {
+ char *__t = input_line_pointer;
+ msp430_operands (opcode, str);
+ input_line_pointer = __t;
+ }
+}
/* GAS will call this function for each section at the end of the assembly,
to permit the CPU backend to adjust the alignment of a section. */
valueT
-md_section_align (seg, addr)
- asection *seg;
- valueT addr;
+md_section_align (asection * seg, valueT addr)
{
int align = bfd_get_section_alignment (stdoutput, seg);
macro would return the length of an instruction. */
long
-md_pcrel_from_section (fixp, sec)
- fixS *fixp;
- segT sec;
+md_pcrel_from_section (fixS * fixp, segT sec)
{
if (fixp->fx_addsy != (symbolS *) NULL
&& (!S_IS_DEFINED (fixp->fx_addsy)
value in the object file. */
void
-md_apply_fix3 (fixp, valuep, seg)
- fixS *fixp;
- valueT *valuep;
- segT seg;
+md_apply_fix3 (fixS * fixp, valueT * valuep, segT seg)
{
- unsigned char *where;
+ unsigned char * where;
unsigned long insn;
long value;
bfd_putl16 ((bfd_vma) (value | insn), where);
break;
+ case BFD_RELOC_MSP430_RL_PCREL:
case BFD_RELOC_MSP430_16_PCREL:
if (value & 1)
as_bad_where (fixp->fx_file, fixp->fx_line,
then it is done here. */
arelent *
-tc_gen_reloc (seg, fixp)
- asection *seg ATTRIBUTE_UNUSED;
- fixS *fixp;
+tc_gen_reloc (asection * seg ATTRIBUTE_UNUSED, fixS * fixp)
{
- arelent *reloc;
+ arelent * reloc;
- reloc = (arelent *) xmalloc (sizeof (arelent));
+ reloc = xmalloc (sizeof (arelent));
- reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *));
+ reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *));
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
return reloc;
}
-/* Parse ordinary expression. */
+int
+md_estimate_size_before_relax (fragS * fragP ATTRIBUTE_UNUSED,
+ asection * segment_type ATTRIBUTE_UNUSED)
+{
+ if (fragP->fr_symbol && S_GET_SEGMENT (fragP->fr_symbol) == segment_type)
+ {
+ /* This is a jump -> pcrel mode. Nothing to do much here.
+ Return value == 2. */
+ fragP->fr_subtype =
+ ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_BITS10);
+ }
+ else if (fragP->fr_symbol)
+ {
+ /* Its got a segment, but its not ours. Even if fr_symbol is in
+ an absolute segment, we dont know a displacement until we link
+ object files. So it will always be long. This also applies to
+ labels in a subsegment of current. Liker may relax it to short
+ jump later. Return value == 8. */
+ fragP->fr_subtype =
+ ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_WORD);
+ }
+ else
+ {
+ /* We know the abs value. may be it is a jump to fixed address.
+ Impossible in our case, cause all constants already handeled. */
+ fragP->fr_subtype =
+ ENCODE_RELAX (RELAX_LEN (fragP->fr_subtype), STATE_UNDEF);
+ }
-static char *
-parse_exp (s, op)
- char *s;
- expressionS *op;
+ return md_relax_table[fragP->fr_subtype].rlx_length;
+}
+
+void
+md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED,
+ asection * sec ATTRIBUTE_UNUSED,
+ fragS * fragP)
{
- input_line_pointer = s;
- expression (op);
- if (op->X_op == O_absent)
- as_bad (_("missing operand"));
- return input_line_pointer;
+ char * where = 0;
+ int rela = -1;
+ int i;
+ struct rcodes_s * cc = NULL;
+ struct hcodes_s * hc = NULL;
+
+ switch (fragP->fr_subtype)
+ {
+ case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_BITS10):
+ case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_BITS10):
+ case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_BITS10):
+ /* We do not have to convert anything here.
+ Just apply a fix. */
+ rela = BFD_RELOC_MSP430_10_PCREL;
+ break;
+
+ case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_UNCOND_BRANCH, STATE_UNDEF):
+ /* Convert uncond branch jmp lab -> br lab. */
+ cc = & msp430_rcodes[7];
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (cc->lop0, where);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ fragP->fr_fix += 2;
+ break;
+
+ case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_SIMPLE_BRANCH, STATE_UNDEF):
+ {
+ /* Other simple branches. */
+ int insn = bfd_getl16 (fragP->fr_opcode);
+
+ insn &= 0xffff;
+ /* Find actual instruction. */
+ for (i = 0; i < 7 && !cc; i++)
+ if (msp430_rcodes[i].sop == insn)
+ cc = & msp430_rcodes[i];
+ if (!cc || !cc->name)
+ as_fatal (_("internal inconsistency problem in %s: insn %04lx"),
+ __FUNCTION__, (long) insn);
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (cc->lop0, where);
+ bfd_putl16 (cc->lop1, where + 2);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ fragP->fr_fix += 4;
+ }
+ break;
+
+ case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_NOOV_BRANCH, STATE_UNDEF):
+ cc = & msp430_rcodes[6];
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (cc->lop0, where);
+ bfd_putl16 (cc->lop1, where + 2);
+ bfd_putl16 (cc->lop2, where + 4);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ fragP->fr_fix += 6;
+ break;
+
+ case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_BITS10):
+ {
+ int insn = bfd_getl16 (fragP->fr_opcode + 2);
+
+ insn &= 0xffff;
+ for (i = 0; i < 4 && !hc; i++)
+ if (msp430_hcodes[i].op1 == insn)
+ hc = &msp430_hcodes[i];
+ if (!hc || !hc->name)
+ as_fatal (_("internal inconsistency problem in %s: ext. insn %04lx"),
+ __FUNCTION__, (long) insn);
+ rela = BFD_RELOC_MSP430_10_PCREL;
+ /* Apply a fix for a first label if necessary.
+ another fix will be applied to the next word of insn anyway. */
+ if (hc->tlab == 2)
+ fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol,
+ fragP->fr_offset, TRUE, rela);
+ fragP->fr_fix += 2;
+ }
+
+ break;
+
+ case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_WORD):
+ case ENCODE_RELAX (STATE_EMUL_BRANCH, STATE_UNDEF):
+ {
+ int insn = bfd_getl16 (fragP->fr_opcode + 2);
+
+ insn &= 0xffff;
+ for (i = 0; i < 4 && !hc; i++)
+ if (msp430_hcodes[i].op1 == insn)
+ hc = & msp430_hcodes[i];
+ if (!hc || !hc->name)
+ as_fatal (_("internal inconsistency problem in %s: ext. insn %04lx"),
+ __FUNCTION__, (long) insn);
+ rela = BFD_RELOC_MSP430_RL_PCREL;
+ where = fragP->fr_literal + fragP->fr_fix;
+ bfd_putl16 (hc->lop0, where);
+ bfd_putl16 (hc->lop1, where + 2);
+ bfd_putl16 (hc->lop2, where + 4);
+ fragP->fr_fix += 6;
+ }
+ break;
+
+ default:
+ as_fatal (_("internal inconsistency problem in %s: %lx"),
+ __FUNCTION__, (long) fragP->fr_subtype);
+ break;
+ }
+
+ /* Now apply fix. */
+ fix_new (fragP, fragP->fr_fix, 2, fragP->fr_symbol,
+ fragP->fr_offset, TRUE, rela);
+ /* Just fixed 2 bytes. */
+ fragP->fr_fix += 2;
}
+/* Relax fragment. Mostly stolen from hc11 and mcore
+ which arches I think I know. */
-int
-md_estimate_size_before_relax (fragp, seg)
- fragS *fragp ATTRIBUTE_UNUSED;
- asection *seg ATTRIBUTE_UNUSED;
+long
+msp430_relax_frag (segT seg ATTRIBUTE_UNUSED, fragS * fragP,
+ long stretch ATTRIBUTE_UNUSED)
{
- abort ();
- return 0;
+ long growth;
+ offsetT aim = 0;
+ symbolS *symbolP;
+ const relax_typeS *this_type;
+ const relax_typeS *start_type;
+ relax_substateT next_state;
+ relax_substateT this_state;
+ const relax_typeS *table = md_relax_table;
+
+ /* Nothing to be done if the frag has already max size. */
+ if (RELAX_STATE (fragP->fr_subtype) == STATE_UNDEF
+ || RELAX_STATE (fragP->fr_subtype) == STATE_WORD)
+ return 0;
+
+ if (RELAX_STATE (fragP->fr_subtype) == STATE_BITS10)
+ {
+ symbolP = fragP->fr_symbol;
+ if (symbol_resolved_p (symbolP))
+ as_fatal (_("internal inconsistency problem in %s: resolved symbol"),
+ __FUNCTION__);
+ /* We know the offset. calculate a distance. */
+ aim = S_GET_VALUE (symbolP) - fragP->fr_address - fragP->fr_fix;
+ }
+
+ this_state = fragP->fr_subtype;
+ start_type = this_type = table + this_state;
+
+ if (aim < 0)
+ {
+ /* Look backwards. */
+ for (next_state = this_type->rlx_more; next_state;)
+ if (aim >= this_type->rlx_backward)
+ next_state = 0;
+ else
+ {
+ /* Grow to next state. */
+ this_state = next_state;
+ this_type = table + this_state;
+ next_state = this_type->rlx_more;
+ }
+ }
+ else
+ {
+ /* Look forwards. */
+ for (next_state = this_type->rlx_more; next_state;)
+ if (aim <= this_type->rlx_forward)
+ next_state = 0;
+ else
+ {
+ /* Grow to next state. */
+ this_state = next_state;
+ this_type = table + this_state;
+ next_state = this_type->rlx_more;
+ }
+ }
+
+ growth = this_type->rlx_length - start_type->rlx_length;
+ if (growth != 0)
+ fragP->fr_subtype = this_state;
+ return growth;
}
projects / deliverable / binutils-gdb.git / commitdiff
