diff options
Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/dwarf2asm.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/dwarf2asm.c | 887 |
1 files changed, 0 insertions, 887 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/dwarf2asm.c b/gcc-4.2.1-5666.3/gcc/dwarf2asm.c deleted file mode 100644 index 59c5e29c2..000000000 --- a/gcc-4.2.1-5666.3/gcc/dwarf2asm.c +++ /dev/null @@ -1,887 +0,0 @@ -/* Dwarf2 assembler output helper routines. - Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. - -This file is part of GCC. - -GCC is free software; you can redistribute it and/or modify it under -the terms of the GNU General Public License as published by the Free -Software Foundation; either version 2, or (at your option) any later -version. - -GCC is distributed in the hope that it will be useful, but WITHOUT ANY -WARRANTY; without even the implied warranty of MERCHANTABILITY or -FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -for more details. - -You should have received a copy of the GNU General Public License -along with GCC; see the file COPYING. If not, write to the Free -Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301, USA. */ - - -#include "config.h" -#include "system.h" -#include "coretypes.h" -#include "tm.h" -#include "flags.h" -#include "tree.h" -#include "rtl.h" -#include "output.h" -#include "target.h" -#include "dwarf2asm.h" -#include "dwarf2.h" -#include "splay-tree.h" -#include "ggc.h" -#include "tm_p.h" - - -/* How to start an assembler comment. */ -#ifndef ASM_COMMENT_START -#define ASM_COMMENT_START ";#" -#endif - - -/* Output an unaligned integer with the given value and size. Prefer not - to print a newline, since the caller may want to add a comment. */ - -void -dw2_assemble_integer (int size, rtx x) -{ - const char *op = integer_asm_op (size, FALSE); - - if (op) - { - fputs (op, asm_out_file); - if (GET_CODE (x) == CONST_INT) - fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX, INTVAL (x)); - else - output_addr_const (asm_out_file, x); - } - else - assemble_integer (x, size, BITS_PER_UNIT, 1); -} - - -/* Output an immediate constant in a given size. */ - -void -dw2_asm_output_data (int size, unsigned HOST_WIDE_INT value, - const char *comment, ...) -{ - va_list ap; - const char *op = integer_asm_op (size, FALSE); - - va_start (ap, comment); - - if (size * 8 < HOST_BITS_PER_WIDE_INT) - value &= ~(~(unsigned HOST_WIDE_INT) 0 << (size * 8)); - - if (op) - fprintf (asm_out_file, "%s" HOST_WIDE_INT_PRINT_HEX, op, value); - else - assemble_integer (GEN_INT (value), size, BITS_PER_UNIT, 1); - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -/* Output the difference between two symbols in a given size. */ -/* ??? There appear to be assemblers that do not like such - subtraction, but do support ASM_SET_OP. It's unfortunately - impossible to do here, since the ASM_SET_OP for the difference - symbol must appear after both symbols are defined. */ - -void -dw2_asm_output_delta (int size, const char *lab1, const char *lab2, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef ASM_OUTPUT_DWARF_DELTA - ASM_OUTPUT_DWARF_DELTA (asm_out_file, size, lab1, lab2); -#else - dw2_assemble_integer (size, - gen_rtx_MINUS (Pmode, - gen_rtx_SYMBOL_REF (Pmode, lab1), - gen_rtx_SYMBOL_REF (Pmode, lab2))); -#endif - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -/* Output a section-relative reference to a LABEL, which was placed in - BASE. In general this can only be done for debugging symbols. - E.g. on most targets with the GNU linker, this is accomplished with - a direct reference and the knowledge that the debugging section - will be placed at VMA 0. Some targets have special relocations for - this that we must use. */ - -void -dw2_asm_output_offset (int size, const char *label, - section *base ATTRIBUTE_UNUSED, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef ASM_OUTPUT_DWARF_OFFSET - ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label, base); -#else - dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label)); -#endif - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -#if 0 - -/* Output a self-relative reference to a label, possibly in a - different section or object file. */ - -void -dw2_asm_output_pcrel (int size ATTRIBUTE_UNUSED, - const char *label ATTRIBUTE_UNUSED, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef ASM_OUTPUT_DWARF_PCREL - ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, label); -#else - dw2_assemble_integer (size, - gen_rtx_MINUS (Pmode, - gen_rtx_SYMBOL_REF (Pmode, label), - pc_rtx)); -#endif - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} -#endif /* 0 */ - -/* Output an absolute reference to a label. */ - -void -dw2_asm_output_addr (int size, const char *label, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - - dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label)); - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -/* Similar, but use an RTX expression instead of a text label. */ - -void -dw2_asm_output_addr_rtx (int size, rtx addr, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - - dw2_assemble_integer (size, addr); - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -/* Output the first ORIG_LEN characters of STR as a string. - If ORIG_LEN is equal to -1, ignore this parameter and output - the entire STR instead. - If COMMENT is not NULL and comments in the debug information - have been requested by the user, append the given COMMENT - to the generated output. */ - -void -dw2_asm_output_nstring (const char *str, size_t orig_len, - const char *comment, ...) -{ - size_t i, len; - va_list ap; - - va_start (ap, comment); - - len = orig_len; - - if (len == (size_t) -1) - len = strlen (str); - - if (flag_debug_asm && comment) - { - fputs ("\t.ascii \"", asm_out_file); - for (i = 0; i < len; i++) - { - int c = str[i]; - if (c == '\"' || c == '\\') - fputc ('\\', asm_out_file); - if (ISPRINT(c)) - fputc (c, asm_out_file); - else - fprintf (asm_out_file, "\\%o", c); - } - fprintf (asm_out_file, "\\0\"\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - fputc ('\n', asm_out_file); - } - else - { - /* If an explicit length was given, we can't assume there - is a null termination in the string buffer. */ - if (orig_len == (size_t) -1) - len += 1; - ASM_OUTPUT_ASCII (asm_out_file, str, len); - if (orig_len != (size_t) -1) - assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1); - } - - va_end (ap); -} - - -/* Return the size of an unsigned LEB128 quantity. */ - -int -size_of_uleb128 (unsigned HOST_WIDE_INT value) -{ - int size = 0; - - do - { - value >>= 7; - size += 1; - } - while (value != 0); - - return size; -} - -/* Return the size of a signed LEB128 quantity. */ - -int -size_of_sleb128 (HOST_WIDE_INT value) -{ - int size = 0, byte; - - do - { - byte = (value & 0x7f); - value >>= 7; - size += 1; - } - while (!((value == 0 && (byte & 0x40) == 0) - || (value == -1 && (byte & 0x40) != 0))); - - return size; -} - -/* Given an encoding, return the number of bytes the format occupies. - This is only defined for fixed-size encodings, and so does not - include leb128. */ - -int -size_of_encoded_value (int encoding) -{ - if (encoding == DW_EH_PE_omit) - return 0; - - switch (encoding & 0x07) - { - case DW_EH_PE_absptr: - return POINTER_SIZE / BITS_PER_UNIT; - case DW_EH_PE_udata2: - return 2; - case DW_EH_PE_udata4: - return 4; - case DW_EH_PE_udata8: - return 8; - default: - gcc_unreachable (); - } -} - -/* Yield a name for a given pointer encoding. */ - -const char * -eh_data_format_name (int format) -{ -#if HAVE_DESIGNATED_INITIALIZERS -#define S(p, v) [p] = v, -#else -#define S(p, v) case p: return v; -#endif - -#if HAVE_DESIGNATED_INITIALIZERS - __extension__ static const char * const format_names[256] = { -#else - switch (format) { -#endif - - S(DW_EH_PE_absptr, "absolute") - S(DW_EH_PE_omit, "omit") - S(DW_EH_PE_aligned, "aligned absolute") - - S(DW_EH_PE_uleb128, "uleb128") - S(DW_EH_PE_udata2, "udata2") - S(DW_EH_PE_udata4, "udata4") - S(DW_EH_PE_udata8, "udata8") - S(DW_EH_PE_sleb128, "sleb128") - S(DW_EH_PE_sdata2, "sdata2") - S(DW_EH_PE_sdata4, "sdata4") - S(DW_EH_PE_sdata8, "sdata8") - - S(DW_EH_PE_absptr | DW_EH_PE_pcrel, "pcrel") - S(DW_EH_PE_uleb128 | DW_EH_PE_pcrel, "pcrel uleb128") - S(DW_EH_PE_udata2 | DW_EH_PE_pcrel, "pcrel udata2") - S(DW_EH_PE_udata4 | DW_EH_PE_pcrel, "pcrel udata4") - S(DW_EH_PE_udata8 | DW_EH_PE_pcrel, "pcrel udata8") - S(DW_EH_PE_sleb128 | DW_EH_PE_pcrel, "pcrel sleb128") - S(DW_EH_PE_sdata2 | DW_EH_PE_pcrel, "pcrel sdata2") - S(DW_EH_PE_sdata4 | DW_EH_PE_pcrel, "pcrel sdata4") - S(DW_EH_PE_sdata8 | DW_EH_PE_pcrel, "pcrel sdata8") - - S(DW_EH_PE_absptr | DW_EH_PE_textrel, "textrel") - S(DW_EH_PE_uleb128 | DW_EH_PE_textrel, "textrel uleb128") - S(DW_EH_PE_udata2 | DW_EH_PE_textrel, "textrel udata2") - S(DW_EH_PE_udata4 | DW_EH_PE_textrel, "textrel udata4") - S(DW_EH_PE_udata8 | DW_EH_PE_textrel, "textrel udata8") - S(DW_EH_PE_sleb128 | DW_EH_PE_textrel, "textrel sleb128") - S(DW_EH_PE_sdata2 | DW_EH_PE_textrel, "textrel sdata2") - S(DW_EH_PE_sdata4 | DW_EH_PE_textrel, "textrel sdata4") - S(DW_EH_PE_sdata8 | DW_EH_PE_textrel, "textrel sdata8") - - S(DW_EH_PE_absptr | DW_EH_PE_datarel, "datarel") - S(DW_EH_PE_uleb128 | DW_EH_PE_datarel, "datarel uleb128") - S(DW_EH_PE_udata2 | DW_EH_PE_datarel, "datarel udata2") - S(DW_EH_PE_udata4 | DW_EH_PE_datarel, "datarel udata4") - S(DW_EH_PE_udata8 | DW_EH_PE_datarel, "datarel udata8") - S(DW_EH_PE_sleb128 | DW_EH_PE_datarel, "datarel sleb128") - S(DW_EH_PE_sdata2 | DW_EH_PE_datarel, "datarel sdata2") - S(DW_EH_PE_sdata4 | DW_EH_PE_datarel, "datarel sdata4") - S(DW_EH_PE_sdata8 | DW_EH_PE_datarel, "datarel sdata8") - - S(DW_EH_PE_absptr | DW_EH_PE_funcrel, "funcrel") - S(DW_EH_PE_uleb128 | DW_EH_PE_funcrel, "funcrel uleb128") - S(DW_EH_PE_udata2 | DW_EH_PE_funcrel, "funcrel udata2") - S(DW_EH_PE_udata4 | DW_EH_PE_funcrel, "funcrel udata4") - S(DW_EH_PE_udata8 | DW_EH_PE_funcrel, "funcrel udata8") - S(DW_EH_PE_sleb128 | DW_EH_PE_funcrel, "funcrel sleb128") - S(DW_EH_PE_sdata2 | DW_EH_PE_funcrel, "funcrel sdata2") - S(DW_EH_PE_sdata4 | DW_EH_PE_funcrel, "funcrel sdata4") - S(DW_EH_PE_sdata8 | DW_EH_PE_funcrel, "funcrel sdata8") - - S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_pcrel, - "indirect pcrel") - S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_pcrel, - "indirect pcrel uleb128") - S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_pcrel, - "indirect pcrel udata2") - S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_pcrel, - "indirect pcrel udata4") - S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_pcrel, - "indirect pcrel udata8") - S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_pcrel, - "indirect pcrel sleb128") - S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_pcrel, - "indirect pcrel sdata2") - S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_pcrel, - "indirect pcrel sdata4") - S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_pcrel, - "indirect pcrel sdata8") - - S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_textrel, - "indirect textrel") - S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_textrel, - "indirect textrel uleb128") - S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_textrel, - "indirect textrel udata2") - S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_textrel, - "indirect textrel udata4") - S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_textrel, - "indirect textrel udata8") - S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_textrel, - "indirect textrel sleb128") - S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_textrel, - "indirect textrel sdata2") - S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_textrel, - "indirect textrel sdata4") - S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_textrel, - "indirect textrel sdata8") - - S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_datarel, - "indirect datarel") - S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_datarel, - "indirect datarel uleb128") - S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_datarel, - "indirect datarel udata2") - S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_datarel, - "indirect datarel udata4") - S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_datarel, - "indirect datarel udata8") - S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_datarel, - "indirect datarel sleb128") - S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_datarel, - "indirect datarel sdata2") - S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_datarel, - "indirect datarel sdata4") - S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_datarel, - "indirect datarel sdata8") - - S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_funcrel, - "indirect funcrel") - S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_funcrel, - "indirect funcrel uleb128") - S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_funcrel, - "indirect funcrel udata2") - S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_funcrel, - "indirect funcrel udata4") - S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_funcrel, - "indirect funcrel udata8") - S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_funcrel, - "indirect funcrel sleb128") - S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_funcrel, - "indirect funcrel sdata2") - S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_funcrel, - "indirect funcrel sdata4") - S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_funcrel, - "indirect funcrel sdata8") - -#if HAVE_DESIGNATED_INITIALIZERS - }; - - gcc_assert (format >= 0 && format < 0x100 && format_names[format]); - - return format_names[format]; -#else - } - gcc_unreachable (); -#endif -} - -/* Output an unsigned LEB128 quantity. */ - -void -dw2_asm_output_data_uleb128 (unsigned HOST_WIDE_INT value, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef HAVE_AS_LEB128 - fprintf (asm_out_file, "\t.uleb128 " HOST_WIDE_INT_PRINT_HEX , value); - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } -#else - { - unsigned HOST_WIDE_INT work = value; - const char *byte_op = targetm.asm_out.byte_op; - - if (byte_op) - fputs (byte_op, asm_out_file); - do - { - int byte = (work & 0x7f); - work >>= 7; - if (work != 0) - /* More bytes to follow. */ - byte |= 0x80; - - if (byte_op) - { - fprintf (asm_out_file, "0x%x", byte); - if (work != 0) - fputc (',', asm_out_file); - } - else - assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); - } - while (work != 0); - - if (flag_debug_asm) - { - fprintf (asm_out_file, "\t%s uleb128 " HOST_WIDE_INT_PRINT_HEX, - ASM_COMMENT_START, value); - if (comment) - { - fputs ("; ", asm_out_file); - vfprintf (asm_out_file, comment, ap); - } - } - } -#endif - fputc ('\n', asm_out_file); - - va_end (ap); -} - -/* Output a signed LEB128 quantity. */ - -void -dw2_asm_output_data_sleb128 (HOST_WIDE_INT value, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef HAVE_AS_LEB128 - fprintf (asm_out_file, "\t.sleb128 " HOST_WIDE_INT_PRINT_DEC, value); - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } -#else - { - HOST_WIDE_INT work = value; - int more, byte; - const char *byte_op = targetm.asm_out.byte_op; - - if (byte_op) - fputs (byte_op, asm_out_file); - do - { - byte = (work & 0x7f); - /* arithmetic shift */ - work >>= 7; - more = !((work == 0 && (byte & 0x40) == 0) - || (work == -1 && (byte & 0x40) != 0)); - if (more) - byte |= 0x80; - - if (byte_op) - { - fprintf (asm_out_file, "0x%x", byte); - if (more) - fputc (',', asm_out_file); - } - else - assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1); - } - while (more); - - if (flag_debug_asm) - { - fprintf (asm_out_file, "\t%s sleb128 " HOST_WIDE_INT_PRINT_DEC, - ASM_COMMENT_START, value); - if (comment) - { - fputs ("; ", asm_out_file); - vfprintf (asm_out_file, comment, ap); - } - } - } -#endif - fputc ('\n', asm_out_file); - - va_end (ap); -} - -void -dw2_asm_output_delta_uleb128 (const char *lab1 ATTRIBUTE_UNUSED, - const char *lab2 ATTRIBUTE_UNUSED, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef HAVE_AS_LEB128 - fputs ("\t.uleb128 ", asm_out_file); - assemble_name (asm_out_file, lab1); - fputc ('-', asm_out_file); - assemble_name (asm_out_file, lab2); -#else - gcc_unreachable (); -#endif - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -#if 0 - -void -dw2_asm_output_delta_sleb128 (const char *lab1 ATTRIBUTE_UNUSED, - const char *lab2 ATTRIBUTE_UNUSED, - const char *comment, ...) -{ - va_list ap; - - va_start (ap, comment); - -#ifdef HAVE_AS_LEB128 - fputs ("\t.sleb128 ", asm_out_file); - assemble_name (asm_out_file, lab1); - fputc ('-', asm_out_file); - assemble_name (asm_out_file, lab2); -#else - gcc_unreachable (); -#endif - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} -#endif /* 0 */ - -static rtx dw2_force_const_mem (rtx, bool); -static int dw2_output_indirect_constant_1 (splay_tree_node, void *); - -static GTY((param1_is (char *), param2_is (tree))) splay_tree indirect_pool; - -static GTY(()) int dw2_const_labelno; - -#if defined(HAVE_GAS_HIDDEN) && defined(SUPPORTS_ONE_ONLY) -# define USE_LINKONCE_INDIRECT 1 -#else -# define USE_LINKONCE_INDIRECT 0 -#endif - -/* Put X, a SYMBOL_REF, in memory. Return a SYMBOL_REF to the allocated - memory. Differs from force_const_mem in that a single pool is used for - the entire unit of translation, and the memory is not guaranteed to be - "near" the function in any interesting sense. PUBLIC controls whether - the symbol can be shared across the entire application (or DSO). */ - -static rtx -dw2_force_const_mem (rtx x, bool public) -{ - splay_tree_node node; - const char *str; - tree decl; - - if (! indirect_pool) - indirect_pool = splay_tree_new_ggc (splay_tree_compare_pointers); - - gcc_assert (GET_CODE (x) == SYMBOL_REF); - - str = targetm.strip_name_encoding (XSTR (x, 0)); - node = splay_tree_lookup (indirect_pool, (splay_tree_key) str); - if (node) - decl = (tree) node->value; - else - { - tree id; - - if (public && USE_LINKONCE_INDIRECT) - { - char *ref_name = alloca (strlen (str) + sizeof "DW.ref."); - - sprintf (ref_name, "DW.ref.%s", str); - id = get_identifier (ref_name); - decl = build_decl (VAR_DECL, id, ptr_type_node); - DECL_ARTIFICIAL (decl) = 1; - DECL_IGNORED_P (decl) = 1; - TREE_PUBLIC (decl) = 1; - DECL_INITIAL (decl) = decl; - make_decl_one_only (decl); - } - else - { - char label[32]; - - ASM_GENERATE_INTERNAL_LABEL (label, "LDFCM", dw2_const_labelno); - ++dw2_const_labelno; - id = get_identifier (label); - decl = build_decl (VAR_DECL, id, ptr_type_node); - DECL_ARTIFICIAL (decl) = 1; - DECL_IGNORED_P (decl) = 1; - TREE_STATIC (decl) = 1; - DECL_INITIAL (decl) = decl; - } - - id = maybe_get_identifier (str); - if (id) - TREE_SYMBOL_REFERENCED (id) = 1; - - splay_tree_insert (indirect_pool, (splay_tree_key) str, - (splay_tree_value) decl); - } - - return XEXP (DECL_RTL (decl), 0); -} - -/* A helper function for dw2_output_indirect_constants called through - splay_tree_foreach. Emit one queued constant to memory. */ - -static int -dw2_output_indirect_constant_1 (splay_tree_node node, - void *data ATTRIBUTE_UNUSED) -{ - const char *sym; - rtx sym_ref; - tree decl; - - sym = (const char *) node->key; - decl = (tree) node->value; - sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym); - if (TREE_PUBLIC (decl) && USE_LINKONCE_INDIRECT) - fprintf (asm_out_file, "\t.hidden %sDW.ref.%s\n", user_label_prefix, sym); - assemble_variable (decl, 1, 1, 1); - assemble_integer (sym_ref, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1); - - return 0; -} - -/* Emit the constants queued through dw2_force_const_mem. */ - -void -dw2_output_indirect_constants (void) -{ - if (indirect_pool) - splay_tree_foreach (indirect_pool, dw2_output_indirect_constant_1, NULL); -} - -/* Like dw2_asm_output_addr_rtx, but encode the pointer as directed. - If PUBLIC is set and the encoding is DW_EH_PE_indirect, the indirect - reference is shared across the entire application (or DSO). */ - -void -dw2_asm_output_encoded_addr_rtx (int encoding, rtx addr, bool public, - const char *comment, ...) -{ - int size; - va_list ap; - - va_start (ap, comment); - - size = size_of_encoded_value (encoding); - - if (encoding == DW_EH_PE_aligned) - { - assemble_align (POINTER_SIZE); - assemble_integer (addr, size, POINTER_SIZE, 1); - return; - } - - /* NULL is _always_ represented as a plain zero, as is 1 for Ada's - "all others". */ - if (addr == const0_rtx || addr == const1_rtx) - assemble_integer (addr, size, BITS_PER_UNIT, 1); - else - { - restart: - /* Allow the target first crack at emitting this. Some of the - special relocations require special directives instead of - just ".4byte" or whatever. */ -#ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX - ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX (asm_out_file, encoding, size, - addr, done); -#endif - - /* Indirection is used to get dynamic relocations out of a - read-only section. */ - if (encoding & DW_EH_PE_indirect) - { - /* It is very tempting to use force_const_mem so that we share data - with the normal constant pool. However, we've already emitted - the constant pool for this function. Moreover, we'd like to - share these constants across the entire unit of translation and - even, if possible, across the entire application (or DSO). */ - addr = dw2_force_const_mem (addr, public); - encoding &= ~DW_EH_PE_indirect; - goto restart; - } - - switch (encoding & 0xF0) - { - case DW_EH_PE_absptr: - dw2_assemble_integer (size, addr); - break; - - case DW_EH_PE_pcrel: - gcc_assert (GET_CODE (addr) == SYMBOL_REF); -#ifdef ASM_OUTPUT_DWARF_PCREL - ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, XSTR (addr, 0)); -#else - dw2_assemble_integer (size, gen_rtx_MINUS (Pmode, addr, pc_rtx)); -#endif - break; - - default: - /* Other encodings should have been handled by - ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX. */ - gcc_unreachable (); - } - -#ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX - done:; -#endif - } - - if (flag_debug_asm && comment) - { - fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START); - vfprintf (asm_out_file, comment, ap); - } - fputc ('\n', asm_out_file); - - va_end (ap); -} - -#include "gt-dwarf2asm.h" |