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98578071b9
In order to support Mach-O better, add support for subsections, as used by Mach-O "subsections_via_symbols". We also want to add infrastructure to support this by downcalling to the backend to indicate if a new subsection is needed. Currently this supports a maximum of 2^14 subsections per section for Mach-O; this can be addressed by adding a level of indirection (or cleaning up the handling of sections so we have an actual data structure.) Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
75 lines
2.9 KiB
C
75 lines
2.9 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2018 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* labels.h header file for labels.c
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*/
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#ifndef LABELS_H
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#define LABELS_H
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#include "compiler.h"
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enum mangle_index {
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LM_LPREFIX, /* Local variable prefix */
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LM_LSUFFIX, /* Local variable suffix */
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LM_GPREFIX, /* Global variable prefix */
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LM_GSUFFIX /* GLobal variable suffix */
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};
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enum label_type {
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LBL_LOCAL, /* Must be zero */
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LBL_GLOBAL,
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LBL_STATIC,
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LBL_EXTERN,
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LBL_COMMON,
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LBL_SPECIAL, /* Magic symbols like ..start */
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LBL_BACKEND /* Backend-defined symbols like ..got */
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};
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bool lookup_label(const char *label, int32_t *segment, int64_t *offset);
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bool is_extern(const char *label);
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void define_label(const char *label, int32_t segment, int64_t offset,
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bool normal);
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void backend_label(const char *label, int32_t segment, int64_t offset);
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bool declare_label(const char *label, enum label_type type,
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const char *special);
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void set_label_mangle(enum mangle_index which, const char *what);
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int init_labels(void);
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void cleanup_labels(void);
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const char *local_scope(const char *label);
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extern uint64_t global_offset_changed;
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#endif /* LABELS_H */
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