/* tc-xtensa.h -- Header file for tc-xtensa.c.
- Copyright (C) 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2003-2019 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
#include "xtensa-isa.h"
#include "xtensa-config.h"
-#define TARGET_BYTES_BIG_ENDIAN XCHAL_HAVE_BE
+#define TARGET_BYTES_BIG_ENDIAN 0
/* Maximum number of opcode slots in a VLIW instruction. */
enum xtensa_relax_statesE
{
+ RELAX_XTENSA_NONE,
+
RELAX_ALIGN_NEXT_OPCODE,
/* Use the first opcode of the next fragment to determine the
alignment requirements. This is ONLY used for LOOPs currently. */
RELAX_LOOP_END_ADD_NOP,
/* When the code density option is available, this will generate a
NOP.N marked RELAX_NARROW. Otherwise, it will create an rs_fill
- fragment with a NOP in it. */
+ fragment with a NOP in it. Once a frag has been converted to
+ RELAX_LOOP_END_ADD_NOP, it should never be changed back to
+ RELAX_LOOP_END. */
RELAX_LITERAL,
/* Another fragment could generate an expansion here but has not yet. */
RELAX_LITERAL_POOL_BEGIN,
RELAX_LITERAL_POOL_END,
+ RELAX_LITERAL_POOL_CANDIDATE_BEGIN,
/* Technically these are not relaxations at all but mark a location
to store literals later. Note that fr_var stores the frchain for
BEGIN frags and fr_var stores now_seg for END frags. */
RELAX_UNREACHABLE frag. */
RELAX_ORG,
- /* This marks the location as having previously been an rs_org frag.
+ /* This marks the location as having previously been an rs_org frag.
rs_org frags are converted to fill-zero frags immediately after
relaxation. However, we need to remember where they were so we can
prevent the linker from changing the size of any frag between the
section start and the org frag. */
+ RELAX_TRAMPOLINE,
+ /* Every few thousand frags, we insert one of these, just in case we may
+ need some space for a trampoline (jump to a jump) because the function
+ has gotten too big. If not needed, it disappears. */
+
RELAX_NONE
};
align branch targets as if it were a normal narrow instruction. */
unsigned int is_aligning_branch : 1;
+ /* A trampoline frag that is located in the middle of code and thus
+ needs a jump around. */
+ unsigned int needs_jump_around : 1;
+
/* For text fragments that can generate literals at relax time, this
variable points to the frag where the literal will be stored. For
literal frags, this variable points to the nearest literal pool
int literal_expansion[MAX_SLOTS];
int unreported_expansion;
+ /* For slots that have a free register for relaxation, record that
+ register. */
+ expressionS free_reg[MAX_SLOTS];
+
/* For text fragments that can generate literals at relax time: */
fragS *literal_frags[MAX_SLOTS];
enum xtensa_relax_statesE slot_subtypes[MAX_SLOTS];
symbolS *slot_symbols[MAX_SLOTS];
offsetT slot_offsets[MAX_SLOTS];
- /* The global aligner needs to walk backward through the list of
- frags. This field is only valid after xtensa_end. */
- fragS *fr_prev;
+ /* For trampoline fragments. */
+ struct fix *jump_around_fix;
+
+ /* When marking frags after this one in the chain as no transform,
+ cache the last one in the chain, so that we can skip to the
+ end of the chain. */
+ fragS *no_transform_end;
};
{
unsigned int is_loop_target : 1;
unsigned int is_branch_target : 1;
+ symbolS *next_expr_symbol;
} xtensa_symfield_type;
extern int xtensa_unrecognized_line (int);
extern bfd_boolean xtensa_check_inside_bundle (void);
extern void xtensa_handle_align (fragS *);
-extern char *xtensa_section_rename (char *);
+extern char *xtensa_section_rename (const char *);
+
+/* We need to set the target endianness in xtensa_init and not in md_begin.
+ This is because xtensa_target_format is called before md_begin, and we
+ want to have all non-statically initialized fields initialized. */
+
+#define HOST_SPECIAL_INIT xtensa_init
+extern void xtensa_init (int, char **);
#define TARGET_FORMAT xtensa_target_format ()
#define TARGET_ARCH bfd_arch_xtensa
#define TC_FIX_TYPE xtensa_fix_data
#define TC_INIT_FIX_DATA(x) xtensa_init_fix_data (x)
#define TC_FRAG_TYPE struct xtensa_frag_type
-#define TC_FRAG_INIT(frag) xtensa_frag_init (frag)
+#define TC_FRAG_INIT(frag, max_bytes) xtensa_frag_init (frag)
#define TC_FORCE_RELOCATION(fix) xtensa_force_relocation (fix)
#define TC_FORCE_RELOCATION_SUB_SAME(fix, seg) \
- (! SEG_NORMAL (seg) || xtensa_force_relocation (fix))
-#define TC_VALIDATE_FIX_SUB(fix) xtensa_validate_fix_sub (fix)
+ (GENERIC_FORCE_RELOCATION_SUB_SAME (fix, seg) \
+ || xtensa_force_relocation (fix))
+#define TC_VALIDATE_FIX_SUB(fix, seg) xtensa_validate_fix_sub (fix)
#define NO_PSEUDO_DOT xtensa_check_inside_bundle ()
#define tc_canonicalize_symbol_name(s) xtensa_section_rename (s)
#define tc_canonicalize_section_name(s) xtensa_section_rename (s)
#define tc_fix_adjustable(fix) xtensa_fix_adjustable (fix)
#define tc_frob_label(sym) xtensa_frob_label (sym)
#define tc_unrecognized_line(ch) xtensa_unrecognized_line (ch)
+#define tc_symbol_new_hook(sym) xtensa_symbol_new_hook (sym)
#define md_do_align(a,b,c,d,e) xtensa_flush_pending_output ()
#define md_elf_section_change_hook xtensa_elf_section_change_hook
#define md_end xtensa_end
#define md_relax_frag(segment, fragP, stretch) \
xtensa_relax_frag (fragP, stretch, &stretched)
+/* Only allow call frame debug info optimization when linker relaxation is
+ not enabled as otherwise we could generate the DWARF directives without
+ the relocs necessary to patch them up. */
+#define md_allow_eh_opt (linkrelax == 0)
#define LOCAL_LABELS_FB 1
#define WORKING_DOT_WORD 1
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