diff options
Diffstat (limited to 'gas/read.c')
| -rw-r--r-- | gas/read.c | 36 |
1 files changed, 36 insertions, 0 deletions
@@ -178,6 +178,13 @@ static symbolS *mri_line_label; non-NULL when we are in an MRI common section. */ symbolS *mri_common_symbol; +/* In MRI mode, after a dc.b pseudo-op with an odd number of bytes, we + need to align to an even byte boundary unless the next pseudo-op is + dc.b, ds.b, or dcb.b. This variable is set to 1 if an alignment + may be needed. */ +static int mri_pending_align; + +static void do_align PARAMS ((int, char *)); char *demand_copy_string PARAMS ((int *lenP)); int is_it_end_of_statement PARAMS ((void)); static segT get_segmented_expression PARAMS ((expressionS *expP)); @@ -552,6 +559,20 @@ read_a_source_file (name) if (pop == NULL) pop = (pseudo_typeS *) hash_find (po_hash, s + 1); + /* In MRI mode, we may need to insert an + automatic alignment directive. What a hack + this is. */ + if (mri_pending_align + && (pop == NULL + || ! ((pop->poc_handler == cons + && pop->poc_val == 1) + || (pop->poc_handler == s_space + && pop->poc_val == 1)))) + { + do_align (1, (char *) NULL); + mri_pending_align = 0; + } + /* Print the error msg now, while we still can */ if (pop == NULL) { @@ -577,6 +598,12 @@ read_a_source_file (name) } else { /* machine instruction */ + if (mri_pending_align) + { + do_align (1, (char *) NULL); + mri_pending_align = 0; + } + /* WARNING: c has char, which may be end-of-line. */ /* Also: input_line_pointer->`\0` where c was. */ *input_line_pointer = c; @@ -1847,6 +1874,7 @@ void cons (nbytes) register int nbytes; /* 1=.byte, 2=.word, 4=.long */ { + int c; expressionS exp; #ifdef md_flush_pending_output @@ -1859,6 +1887,7 @@ cons (nbytes) return; } + c = 0; do { if (flag_mri) @@ -1866,9 +1895,16 @@ cons (nbytes) else TC_PARSE_CONS_EXPRESSION (&exp, (unsigned int) nbytes); emit_expr (&exp, (unsigned int) nbytes); + ++c; } while (*input_line_pointer++ == ','); + /* In MRI mode, after an odd number of bytes, we must align to an + even word boundary, unless the next instruction is a dc.b, ds.b + or dcb.b. */ + if (flag_mri && nbytes == 1 && (c & 1) != 0) + mri_pending_align = 1; + input_line_pointer--; /* Put terminator back into stream. */ demand_empty_rest_of_line (); } |