diff options
Diffstat (limited to 'gas/config/tc-ia64.c')
| -rw-r--r-- | gas/config/tc-ia64.c | 87 |
1 files changed, 86 insertions, 1 deletions
diff --git a/gas/config/tc-ia64.c b/gas/config/tc-ia64.c index 701752f..88905b8 100644 --- a/gas/config/tc-ia64.c +++ b/gas/config/tc-ia64.c @@ -623,6 +623,15 @@ typedef struct unw_rec_list { #define SLOT_NUM_NOT_SET (unsigned)-1 +/* Linked list of saved prologue counts. A very poor + implementation of a map from label numbers to prologue counts. */ +typedef struct label_prologue_count +{ + struct label_prologue_count *next; + unsigned long label_number; + unsigned int prologue_count; +} label_prologue_count; + static struct { unsigned long next_slot_number; @@ -649,6 +658,8 @@ static struct int prologue; int prologue_mask; unsigned int prologue_count; /* number of .prologues seen so far */ + /* Prologue counts at previous .label_state directives. */ + struct label_prologue_count * saved_prologue_counts; } unwind; typedef void (*vbyte_func) PARAMS ((int, char *, char *)); @@ -862,6 +873,9 @@ static int output_unw_records PARAMS ((unw_rec_list *, void **)); static int convert_expr_to_ab_reg PARAMS ((expressionS *, unsigned int *, unsigned int *)); static int convert_expr_to_xy_reg PARAMS ((expressionS *, unsigned int *, unsigned int *)); static int generate_unwind_image PARAMS ((const char *)); +static unsigned int get_saved_prologue_count PARAMS ((unsigned long)); +static void save_prologue_count PARAMS ((unsigned long, unsigned int)); +static void free_saved_prologue_counts PARAMS ((void)); /* Build the unwind section name by appending the (possibly stripped) text section NAME to the unwind PREFIX. The resulting string @@ -3156,6 +3170,14 @@ dot_restore (dummy) } else ecount = unwind.prologue_count - 1; + + if (ecount >= unwind.prologue_count) + { + as_bad ("Epilogue count of %lu exceeds number of nested prologues (%u)", + ecount + 1, unwind.prologue_count); + return; + } + add_unwind_entry (output_epilogue (ecount)); if (ecount < unwind.prologue_count) @@ -3228,7 +3250,7 @@ generate_unwind_image (text_name) size = output_unw_records (unwind.list, (void **) &unw_rec); if (size % md.pointer_size != 0) as_bad ("Unwind record is not a multiple of %d bytes.", md.pointer_size); - + /* If there are unwind records, switch sections, and output the info. */ if (size != 0) { @@ -3288,6 +3310,7 @@ generate_unwind_image (text_name) } free_list_records (unwind.list); + free_saved_prologue_counts (); unwind.list = unwind.tail = unwind.current_entry = NULL; return size; @@ -3714,6 +3737,61 @@ dot_spillmem_p (psprel) add_unwind_entry (output_spill_sprel_p (ab, reg, e3.X_add_number, qp)); } +static unsigned int +get_saved_prologue_count (lbl) + unsigned long lbl; +{ + label_prologue_count *lpc = unwind.saved_prologue_counts; + + while (lpc != NULL && lpc->label_number != lbl) + lpc = lpc->next; + + if (lpc != NULL) + return lpc->prologue_count; + + as_bad ("Missing .label_state %ld", lbl); + return 1; +} + +static void +save_prologue_count (lbl, count) + unsigned long lbl; + unsigned int count; +{ + label_prologue_count *lpc = unwind.saved_prologue_counts; + + while (lpc != NULL && lpc->label_number != lbl) + lpc = lpc->next; + + if (lpc != NULL) + lpc->prologue_count = count; + else + { + label_prologue_count * new_lpc = xmalloc (sizeof (* new_lpc)); + + new_lpc->next = unwind.saved_prologue_counts; + new_lpc->label_number = lbl; + new_lpc->prologue_count = count; + unwind.saved_prologue_counts = new_lpc; + } +} + +static void +free_saved_prologue_counts () +{ + label_prologue_count * lpc = unwind.saved_prologue_counts; + label_prologue_count * next; + + while (lpc != NULL) + { + next = lpc->next; + free (lpc); + lpc = next; + } + + unwind.saved_prologue_counts = NULL; +} + static void dot_label_state (dummy) int dummy ATTRIBUTE_UNUSED; @@ -3727,6 +3805,7 @@ dot_label_state (dummy) return; } add_unwind_entry (output_label_state (e.X_add_number)); + save_prologue_count (e.X_add_number, unwind.prologue_count); } static void @@ -3742,6 +3821,7 @@ dot_copy_state (dummy) return; } add_unwind_entry (output_copy_state (e.X_add_number)); + unwind.prologue_count = get_saved_prologue_count (e.X_add_number); } static void @@ -6336,6 +6416,11 @@ md_show_usage (stream) { fputs (_("\ IA-64 options:\n\ + --mconstant-gp mark output file as using the constant-GP model\n\ + (sets ELF header flag EF_IA_64_CONS_GP)\n\ + --mauto-pic mark output file as using the constant-GP model\n\ + without function descriptors (sets ELF header flag\n\ + EF_IA_64_NOFUNCDESC_CONS_GP)\n\ -milp32|-milp64|-mlp64|-mp64 select data model (default -mlp64)\n\ -mle | -mbe select little- or big-endian byte order (default -mle)\n\ -x | -xexplicit turn on dependency violation checking (default)\n\ |