/* tc-alpha.c - Processor-specific code for the DEC Alpha AXP CPU.
Copyright 1989, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
- 2001, 2002 Free Software Foundation, Inc.
+ 2001, 2002, 2003 Free Software Foundation, Inc.
Contributed by Carnegie Mellon University, 1993.
Written by Alessandro Forin, based on earlier gas-1.38 target CPU files.
Modified by Ken Raeburn for gas-2.x and ECOFF support.
#ifdef OBJ_ELF
#include "elf/alpha.h"
#include "dwarf2dbg.h"
+#include "dw2gencfi.h"
#endif
#include "safe-ctype.h"
static void s_alpha_loc PARAMS ((int));
static void s_alpha_stab PARAMS ((int));
static void s_alpha_coff_wrapper PARAMS ((int));
+static void s_alpha_usepv PARAMS ((int));
#endif
#ifdef OBJ_EVAX
static void s_alpha_section PARAMS ((int));
static offsetT alpha_lit8_literal;
#endif
-#ifdef OBJ_ELF
-/* The active .ent symbol. */
-static symbolS *alpha_cur_ent_sym;
-#endif
-
/* Is the assembler not allowed to use $at? */
static int alpha_noat_on = 0;
case BFD_RELOC_ALPHA_LINKAGE:
case BFD_RELOC_ALPHA_CODEADDR:
case BFD_RELOC_ALPHA_BRSGP:
- case BFD_RELOC_VTABLE_INHERIT:
- case BFD_RELOC_VTABLE_ENTRY:
case BFD_RELOC_ALPHA_TLSGD:
case BFD_RELOC_ALPHA_TLSLDM:
case BFD_RELOC_ALPHA_GOTDTPREL16:
break;
}
- return S_FORCE_RELOC (f->fx_addsy);
+ return generic_force_reloc (f);
}
/* Return true if we can partially resolve a relocation now. */
const char *name;
int offset = 0;
- if (S_FORCE_RELOC (sym))
+ if (generic_force_reloc (f))
return 0;
switch (S_GET_OTHER (sym) & STO_ALPHA_STD_GPLOAD)
#endif
#ifdef OBJ_ELF
+struct alpha_elf_frame_data
+{
+ symbolS *func_sym;
+ symbolS *func_end_sym;
+ symbolS *prologue_sym;
+ unsigned int mask;
+ unsigned int fmask;
+ int fp_regno;
+ int ra_regno;
+ offsetT frame_size;
+ offsetT mask_offset;
+ offsetT fmask_offset;
+
+ struct alpha_elf_frame_data *next;
+};
+
+static struct alpha_elf_frame_data *all_frame_data;
+static struct alpha_elf_frame_data **plast_frame_data = &all_frame_data;
+static struct alpha_elf_frame_data *cur_frame_data;
/* Handle the .section pseudo-op. This is like the usual one, but it
clears alpha_insn_label and restores auto alignment. */
{
symbolS *sym;
- if (alpha_cur_ent_sym)
+ if (cur_frame_data)
as_warn (_("nested .ent directives"));
sym = symbol_find_or_make (name);
symbol_get_bfdsym (sym)->flags |= BSF_FUNCTION;
- alpha_cur_ent_sym = sym;
+
+ cur_frame_data = calloc (1, sizeof (*cur_frame_data));
+ cur_frame_data->func_sym = sym;
+
+ /* Provide sensible defaults. */
+ cur_frame_data->fp_regno = 30; /* sp */
+ cur_frame_data->ra_regno = 26; /* ra */
+
+ *plast_frame_data = cur_frame_data;
+ plast_frame_data = &cur_frame_data->next;
/* The .ent directive is sometimes followed by a number. Not sure
what it really means, but ignore it. */
symbolS *sym;
sym = symbol_find (name);
- if (sym != alpha_cur_ent_sym)
+ if (!cur_frame_data)
+ as_warn (_(".end directive without matching .ent"));
+ else if (sym != cur_frame_data->func_sym)
as_warn (_(".end directive names different symbol than .ent"));
/* Create an expression to calculate the size of the function. */
if (sym)
{
- symbol_get_obj (sym)->size =
- (expressionS *) xmalloc (sizeof (expressionS));
- symbol_get_obj (sym)->size->X_op = O_subtract;
- symbol_get_obj (sym)->size->X_add_symbol
- = symbol_new ("L0\001", now_seg, frag_now_fix (), frag_now);
- symbol_get_obj (sym)->size->X_op_symbol = sym;
- symbol_get_obj (sym)->size->X_add_number = 0;
+ OBJ_SYMFIELD_TYPE *obj = symbol_get_obj (sym);
+ expressionS *exp = xmalloc (sizeof (expressionS));
+
+ obj->size = exp;
+ exp->X_op = O_subtract;
+ exp->X_add_symbol = symbol_temp_new_now ();
+ exp->X_op_symbol = sym;
+ exp->X_add_number = 0;
+
+ cur_frame_data->func_end_sym = exp->X_add_symbol;
}
- alpha_cur_ent_sym = NULL;
+ cur_frame_data = NULL;
*input_line_pointer = name_end;
}
ecoff_directive_mask (0);
}
else
- discard_rest_of_line ();
+ {
+ long val;
+ offsetT offset;
+
+ if (!cur_frame_data)
+ {
+ if (fp)
+ as_warn (_(".fmask outside of .ent"));
+ else
+ as_warn (_(".mask outside of .ent"));
+ discard_rest_of_line ();
+ return;
+ }
+
+ if (get_absolute_expression_and_terminator (&val) != ',')
+ {
+ if (fp)
+ as_warn (_("bad .fmask directive"));
+ else
+ as_warn (_("bad .mask directive"));
+ --input_line_pointer;
+ discard_rest_of_line ();
+ return;
+ }
+
+ offset = get_absolute_expression ();
+ demand_empty_rest_of_line ();
+
+ if (fp)
+ {
+ cur_frame_data->fmask = val;
+ cur_frame_data->fmask_offset = offset;
+ }
+ else
+ {
+ cur_frame_data->mask = val;
+ cur_frame_data->mask_offset = offset;
+ }
+ }
}
static void
if (ECOFF_DEBUGGING)
ecoff_directive_frame (0);
else
- discard_rest_of_line ();
+ {
+ long val;
+
+ if (!cur_frame_data)
+ {
+ as_warn (_(".frame outside of .ent"));
+ discard_rest_of_line ();
+ return;
+ }
+
+ cur_frame_data->fp_regno = tc_get_register (1);
+
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer++ != ','
+ || get_absolute_expression_and_terminator (&val) != ',')
+ {
+ as_warn (_("bad .frame directive"));
+ --input_line_pointer;
+ discard_rest_of_line ();
+ return;
+ }
+ cur_frame_data->frame_size = val;
+
+ cur_frame_data->ra_regno = tc_get_register (0);
+
+ /* Next comes the "offset of saved $a0 from $sp". In gcc terms
+ this is current_function_pretend_args_size. There's no place
+ to put this value, so ignore it. */
+ s_ignore (42);
+ }
}
static void
if (ECOFF_DEBUGGING)
sym = ecoff_get_cur_proc_sym ();
else
- sym = alpha_cur_ent_sym;
+ sym = cur_frame_data ? cur_frame_data->func_sym : NULL;
if (sym == NULL)
{
as_bad (_("Invalid argument %d to .prologue."), arg);
break;
}
+
+ if (cur_frame_data)
+ cur_frame_data->prologue_sym = symbol_temp_new_now ();
}
static char *first_file_directive;
ignore_rest_of_line ();
}
}
+
+/* Called at the end of assembly. Here we emit unwind info for frames
+ unless the compiler has done it for us. */
+
+void
+alpha_elf_md_end (void)
+{
+ struct alpha_elf_frame_data *p;
+
+ if (cur_frame_data)
+ as_warn (_(".ent directive without matching .end"));
+
+ /* If someone has generated the unwind info themselves, great. */
+ if (bfd_get_section_by_name (stdoutput, ".eh_frame") != NULL)
+ return;
+
+ /* Generate .eh_frame data for the unwind directives specified. */
+ for (p = all_frame_data; p ; p = p->next)
+ if (p->prologue_sym)
+ {
+ /* Create a temporary symbol at the same location as our
+ function symbol. This prevents problems with globals. */
+ cfi_new_fde (symbol_temp_new (S_GET_SEGMENT (p->func_sym),
+ S_GET_VALUE (p->func_sym),
+ symbol_get_frag (p->func_sym)));
+
+ cfi_set_return_column (p->ra_regno);
+ cfi_add_CFA_def_cfa_register (30);
+ if (p->fp_regno != 30 || p->mask || p->fmask || p->frame_size)
+ {
+ unsigned int mask;
+ offsetT offset;
+
+ cfi_add_advance_loc (p->prologue_sym);
+
+ if (p->fp_regno != 30)
+ if (p->frame_size != 0)
+ cfi_add_CFA_def_cfa (p->fp_regno, p->frame_size);
+ else
+ cfi_add_CFA_def_cfa_register (p->fp_regno);
+ else if (p->frame_size != 0)
+ cfi_add_CFA_def_cfa_offset (p->frame_size);
+
+ mask = p->mask;
+ offset = p->mask_offset;
+
+ /* Recall that $26 is special-cased and stored first. */
+ if ((mask >> 26) & 1)
+ {
+ cfi_add_CFA_offset (26, offset);
+ offset += 8;
+ mask &= ~(1 << 26);
+ }
+ while (mask)
+ {
+ unsigned int i;
+ i = mask & -mask;
+ mask ^= i;
+ i = ffs (i) - 1;
+
+ cfi_add_CFA_offset (i, offset);
+ offset += 8;
+ }
+
+ mask = p->fmask;
+ offset = p->fmask_offset;
+ while (mask)
+ {
+ unsigned int i;
+ i = mask & -mask;
+ mask ^= i;
+ i = ffs (i) - 1;
+
+ cfi_add_CFA_offset (i + 32, offset);
+ offset += 8;
+ }
+ }
+
+ cfi_end_fde (p->func_end_sym);
+ }
+}
+
+static void
+s_alpha_usepv (int unused ATTRIBUTE_UNUSED)
+{
+ char *name, name_end;
+ char *which, which_end;
+ symbolS *sym;
+ int other;
+
+ name = input_line_pointer;
+ name_end = get_symbol_end ();
+
+ if (! is_name_beginner (*name))
+ {
+ as_bad (_(".usepv directive has no name"));
+ *input_line_pointer = name_end;
+ ignore_rest_of_line ();
+ return;
+ }
+
+ sym = symbol_find_or_make (name);
+ *input_line_pointer++ = name_end;
+
+ if (name_end != ',')
+ {
+ as_bad (_(".usepv directive has no type"));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ SKIP_WHITESPACE ();
+ which = input_line_pointer;
+ which_end = get_symbol_end ();
+
+ if (strcmp (which, "no") == 0)
+ other = STO_ALPHA_NOPV;
+ else if (strcmp (which, "std") == 0)
+ other = STO_ALPHA_STD_GPLOAD;
+ else
+ {
+ as_bad (_("unknown argument for .usepv"));
+ other = 0;
+ }
+
+ *input_line_pointer = which_end;
+ demand_empty_rest_of_line ();
+
+ S_SET_OTHER (sym, other | (S_GET_OTHER (sym) & ~STO_ALPHA_STD_GPLOAD));
+}
#endif /* OBJ_ELF */
+/* Standard calling conventions leaves the CFA at $30 on entry. */
+
+void
+alpha_cfi_frame_initial_instructions ()
+{
+ cfi_add_CFA_def_cfa_register (30);
+}
+
#ifdef OBJ_EVAX
/* Handle the section specific pseudo-op. */
int length;
static char case_hack[32];
- extern char *demand_copy_string PARAMS ((int *lenP));
-
sprintf (case_hack, "<CASE:%01d%01d>",
alpha_flag_hash_long_names, alpha_flag_show_after_trunc);
{"loc", s_alpha_loc, 9},
{"stabs", s_alpha_stab, 's'},
{"stabn", s_alpha_stab, 'n'},
+ {"usepv", s_alpha_usepv, 0},
/* COFF debugging related pseudos. */
{"begin", s_alpha_coff_wrapper, 0},
{"bend", s_alpha_coff_wrapper, 1},
return SHF_ALPHA_GPREL;
*ptr_msg = _("Bad .section directive: want a,s,w,x,M,S,G,T in string");
- return 0;
+ return -1;
}
/* Map SHF_ALPHA_GPREL to SEC_SMALL_DATA. */
projects / binutils-gdb.git / blobdiff