diff options
Diffstat (limited to 'contrib/binutils/gas/frags.h')
-rw-r--r-- | contrib/binutils/gas/frags.h | 75 |
1 files changed, 35 insertions, 40 deletions
diff --git a/contrib/binutils/gas/frags.h b/contrib/binutils/gas/frags.h index dcd9a2f..c1c652b 100644 --- a/contrib/binutils/gas/frags.h +++ b/contrib/binutils/gas/frags.h @@ -26,37 +26,34 @@ struct obstack; #endif -/* - * A code fragment (frag) is some known number of chars, followed by some - * unknown number of chars. Typically the unknown number of chars is an - * instruction address whose size is yet unknown. We always know the greatest - * possible size the unknown number of chars may become, and reserve that - * much room at the end of the frag. - * Once created, frags do not change address during assembly. - * We chain the frags in (a) forward-linked list(s). The object-file address - * of the 1st char of a frag is generally not known until after relax(). - * Many things at assembly time describe an address by {object-file-address - * of a particular frag}+offset. - - BUG: it may be smarter to have a single pointer off to various different - notes for different frag kinds. See how code pans - */ - -struct frag -{ - /* Object file address (as an octet offset). */ +/* A code fragment (frag) is some known number of chars, followed by some + unknown number of chars. Typically the unknown number of chars is an + instruction address whose size is yet unknown. We always know the greatest + possible size the unknown number of chars may become, and reserve that + much room at the end of the frag. + Once created, frags do not change address during assembly. + We chain the frags in (a) forward-linked list(s). The object-file address + of the 1st char of a frag is generally not known until after relax(). + Many things at assembly time describe an address by {object-file-address + of a particular frag}+offset. + + BUG: it may be smarter to have a single pointer off to various different + notes for different frag kinds. See how code pans. */ + +struct frag { + /* Object file address (as an octet offset). */ addressT fr_address; - /* Chain forward; ascending address order. Rooted in frch_root. */ + /* Chain forward; ascending address order. Rooted in frch_root. */ struct frag *fr_next; - /* (Fixed) number of octets we know we have. May be 0. */ + /* (Fixed) number of octets we know we have. May be 0. */ offsetT fr_fix; /* May be used for (Variable) number of octets after above. The generic frag handling code no longer makes any use of fr_var. */ offsetT fr_var; - /* For variable-length tail. */ + /* For variable-length tail. */ symbolS *fr_symbol; - /* For variable-length tail. */ + /* For variable-length tail. */ offsetT fr_offset; /* Points to opcode low addr byte, for relaxation. */ char *fr_opcode; @@ -94,8 +91,8 @@ struct frag }; #define SIZEOF_STRUCT_FRAG \ -((char *)zero_address_frag.fr_literal-(char *)&zero_address_frag) -/* We want to say fr_literal[0] above. */ +((char *) zero_address_frag.fr_literal - (char *) &zero_address_frag) +/* We want to say fr_literal[0] above. */ /* Current frag we are building. This frag is incomplete. It is, however, included in frchain_now. The fr_fix field is bogus; @@ -104,31 +101,28 @@ COMMON fragS *frag_now; extern addressT frag_now_fix PARAMS ((void)); extern addressT frag_now_fix_octets PARAMS ((void)); -/* For foreign-segment symbol fixups. */ +/* For foreign-segment symbol fixups. */ COMMON fragS zero_address_frag; -/* For local common (N_BSS segment) fixups. */ +/* For local common (N_BSS segment) fixups. */ COMMON fragS bss_address_frag; #if 0 -/* - * A macro to speed up appending exactly 1 char - * to current frag. - */ -/* JF changed < 1 to <= 1 to avoid a race conditon */ -#define FRAG_APPEND_1_CHAR(datum) \ -{ \ - if (obstack_room( &frags ) <= 1) {\ - frag_wane (frag_now); \ - frag_new (0); \ - } \ - obstack_1grow( &frags, datum ); \ +/* A macro to speed up appending exactly 1 char to current frag. */ +/* JF changed < 1 to <= 1 to avoid a race conditon. */ +#define FRAG_APPEND_1_CHAR(datum) \ +{ \ + if (obstack_room (&frags) <= 1) \ + { \ + frag_wane (frag_now); \ + frag_new (0); \ + } \ + obstack_1grow (&frags, datum); \ } #else extern void frag_append_1_char PARAMS ((int)); #define FRAG_APPEND_1_CHAR(X) frag_append_1_char (X) #endif - void frag_init PARAMS ((void)); fragS *frag_alloc PARAMS ((struct obstack *)); void frag_grow PARAMS ((unsigned int nchars)); @@ -138,6 +132,7 @@ void frag_align_pattern PARAMS ((int alignment, const char *fill_pattern, int n_fill, int max)); +void frag_align_code PARAMS ((int alignment, int max)); void frag_new PARAMS ((int old_frags_var_max_size)); void frag_wane PARAMS ((fragS * fragP)); |