| /* Dwarf2 assembler output helper routines. |
| Copyright (C) 2001-2017 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 3, 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 COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| |
| #include "config.h" |
| #include "system.h" |
| #include "coretypes.h" |
| #include "target.h" |
| #include "rtl.h" |
| #include "tree.h" |
| #include "memmodel.h" |
| #include "tm_p.h" |
| #include "stringpool.h" |
| #include "varasm.h" |
| #include "output.h" |
| #include "dwarf2asm.h" |
| #include "dwarf2.h" |
| #include "function.h" |
| #include "emit-rtl.h" |
| |
| #ifndef XCOFF_DEBUGGING_INFO |
| #define XCOFF_DEBUGGING_INFO 0 |
| #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 (CONST_INT_P (x)) |
| fprint_whex (asm_out_file, (unsigned HOST_WIDE_INT) INTVAL (x)); |
| else |
| output_addr_const (asm_out_file, x); |
| } |
| else |
| assemble_integer (x, size, BITS_PER_UNIT, 1); |
| } |
| |
| |
| /* Output a value of a given size in target byte order. */ |
| |
| void |
| dw2_asm_output_data_raw (int size, unsigned HOST_WIDE_INT value) |
| { |
| unsigned char bytes[8]; |
| int i; |
| |
| for (i = 0; i < 8; ++i) |
| { |
| bytes[i] = value & 0xff; |
| value >>= 8; |
| } |
| |
| if (BYTES_BIG_ENDIAN) |
| { |
| for (i = size - 1; i > 0; --i) |
| fprintf (asm_out_file, "%#x,", bytes[i]); |
| fprintf (asm_out_file, "%#x", bytes[0]); |
| } |
| else |
| { |
| for (i = 0; i < size - 1; ++i) |
| fprintf (asm_out_file, "%#x,", bytes[i]); |
| fprintf (asm_out_file, "%#x", bytes[i]); |
| } |
| } |
| |
| /* Output an immediate constant in a given SIZE in bytes. */ |
| |
| 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 &= ~(HOST_WIDE_INT_M1U << (size * 8)); |
| |
| if (op) |
| { |
| fputs (op, asm_out_file); |
| fprint_whex (asm_out_file, value); |
| } |
| else |
| assemble_integer (GEN_INT (value), size, BITS_PER_UNIT, 1); |
| |
| if (flag_debug_asm && comment) |
| { |
| fputs ("\t" ASM_COMMENT_START " ", asm_out_file); |
| vfprintf (asm_out_file, comment, ap); |
| } |
| putc ('\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); |
| } |
| |
| #ifdef ASM_OUTPUT_DWARF_VMS_DELTA |
| /* Output the difference between two symbols in instruction units |
| in a given size. */ |
| |
| void |
| dw2_asm_output_vms_delta (int size ATTRIBUTE_UNUSED, |
| const char *lab1, const char *lab2, |
| const char *comment, ...) |
| { |
| va_list ap; |
| |
| va_start (ap, comment); |
| |
| ASM_OUTPUT_DWARF_VMS_DELTA (asm_out_file, size, lab1, lab2); |
| 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 |
| |
| /* 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, 0, 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); |
| } |
| |
| void |
| dw2_asm_output_offset (int size, const char *label, HOST_WIDE_INT offset, |
| 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, offset, base); |
| #else |
| dw2_assemble_integer (size, gen_rtx_PLUS (Pmode, |
| gen_rtx_SYMBOL_REF (Pmode, label), |
| gen_int_mode (offset, Pmode))); |
| #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) |
| { |
| if (XCOFF_DEBUGGING_INFO) |
| fputs ("\t.byte \"", asm_out_file); |
| else |
| fputs ("\t.ascii \"", asm_out_file); |
| |
| for (i = 0; i < len; i++) |
| { |
| int c = str[i]; |
| if (c == '\"') |
| fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file); |
| else if (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_UNITS; |
| 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, "indirect absolute") |
| |
| 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, but only the byte values. */ |
| |
| void |
| dw2_asm_output_data_uleb128_raw (unsigned HOST_WIDE_INT value) |
| { |
| while (1) |
| { |
| int byte = (value & 0x7f); |
| value >>= 7; |
| if (value != 0) |
| /* More bytes to follow. */ |
| byte |= 0x80; |
| |
| fprintf (asm_out_file, "%#x", byte); |
| if (value == 0) |
| break; |
| fputc (',', asm_out_file); |
| } |
| } |
| |
| /* 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); |
| |
| if (HAVE_AS_LEB128) |
| { |
| fputs ("\t.uleb128 ", asm_out_file); |
| fprint_whex (asm_out_file, 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, "%#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); |
| } |
| } |
| } |
| |
| putc ('\n', asm_out_file); |
| |
| va_end (ap); |
| } |
| |
| /* Output an signed LEB128 quantity, but only the byte values. */ |
| |
| void |
| dw2_asm_output_data_sleb128_raw (HOST_WIDE_INT value) |
| { |
| int byte, more; |
| |
| while (1) |
| { |
| byte = (value & 0x7f); |
| value >>= 7; |
| more = !((value == 0 && (byte & 0x40) == 0) |
| || (value == -1 && (byte & 0x40) != 0)); |
| if (more) |
| byte |= 0x80; |
| |
| fprintf (asm_out_file, "%#x", byte); |
| if (!more) |
| break; |
| fputc (',', asm_out_file); |
| } |
| } |
| |
| /* 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); |
| |
| if (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, "%#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); |
| } |
| } |
| } |
| |
| 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); |
| |
| gcc_assert (HAVE_AS_LEB128); |
| |
| fputs ("\t.uleb128 ", asm_out_file); |
| assemble_name (asm_out_file, lab1); |
| putc ('-', asm_out_file); |
| assemble_name (asm_out_file, lab2); |
| |
| 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); |
| |
| gcc_assert (HAVE_AS_LEB128); |
| |
| fputs ("\t.sleb128 ", asm_out_file); |
| assemble_name (asm_out_file, lab1); |
| putc ('-', asm_out_file); |
| assemble_name (asm_out_file, lab2); |
| |
| 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 GTY(()) hash_map<const char *, tree> *indirect_pool; |
| |
| static GTY(()) int dw2_const_labelno; |
| |
| #if defined(HAVE_GAS_HIDDEN) |
| # define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY && !XCOFF_DEBUGGING_INFO) |
| #else |
| # define USE_LINKONCE_INDIRECT 0 |
| #endif |
| |
| /* Compare two std::pair<const char *, tree> by their first element. |
| Returns <0, 0, or |
| >0 to indicate whether K1 is less than, equal to, or greater than |
| K2, respectively. */ |
| |
| static int |
| compare_strings (const void *a, const void *b) |
| { |
| const char *s1 = ((const std::pair<const char *, tree> *) a)->first; |
| const char *s2 = ((const std::pair<const char *, tree> *) b)->first; |
| int ret; |
| |
| if (s1 == s2) |
| return 0; |
| |
| ret = strcmp (s1, s2); |
| |
| /* The strings are always those from IDENTIFIER_NODEs, and, |
| therefore, we should never have two copies of the same |
| string. */ |
| gcc_assert (ret); |
| |
| return ret; |
| } |
| |
| /* 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. IS_PUBLIC controls whether |
| the symbol can be shared across the entire application (or DSO). */ |
| |
| rtx |
| dw2_force_const_mem (rtx x, bool is_public) |
| { |
| const char *key; |
| tree decl_id; |
| |
| if (! indirect_pool) |
| indirect_pool = hash_map<const char *, tree>::create_ggc (64); |
| |
| gcc_assert (GET_CODE (x) == SYMBOL_REF); |
| |
| key = XSTR (x, 0); |
| tree *slot = indirect_pool->get (key); |
| if (slot) |
| decl_id = *slot; |
| else |
| { |
| tree id; |
| const char *str = targetm.strip_name_encoding (key); |
| |
| if (is_public && USE_LINKONCE_INDIRECT) |
| { |
| char *ref_name = XALLOCAVEC (char, strlen (str) + sizeof "DW.ref."); |
| |
| sprintf (ref_name, "DW.ref.%s", str); |
| gcc_assert (!maybe_get_identifier (ref_name)); |
| decl_id = get_identifier (ref_name); |
| TREE_PUBLIC (decl_id) = 1; |
| } |
| else |
| { |
| char label[32]; |
| |
| ASM_GENERATE_INTERNAL_LABEL (label, "LDFCM", dw2_const_labelno); |
| ++dw2_const_labelno; |
| gcc_assert (!maybe_get_identifier (label)); |
| decl_id = get_identifier (label); |
| } |
| |
| id = maybe_get_identifier (str); |
| if (id) |
| TREE_SYMBOL_REFERENCED (id) = 1; |
| |
| indirect_pool->put (key, decl_id); |
| } |
| |
| return gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (decl_id)); |
| } |
| |
| /* A helper function for dw2_output_indirect_constants. Emit one queued |
| constant to memory. */ |
| |
| static int |
| dw2_output_indirect_constant_1 (const char *sym, tree id) |
| { |
| rtx sym_ref; |
| tree decl; |
| |
| decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, id, ptr_type_node); |
| SET_DECL_ASSEMBLER_NAME (decl, id); |
| DECL_ARTIFICIAL (decl) = 1; |
| DECL_IGNORED_P (decl) = 1; |
| DECL_INITIAL (decl) = decl; |
| TREE_READONLY (decl) = 1; |
| TREE_STATIC (decl) = 1; |
| |
| if (TREE_PUBLIC (id)) |
| { |
| TREE_PUBLIC (decl) = 1; |
| make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl)); |
| if (USE_LINKONCE_INDIRECT) |
| DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN; |
| } |
| |
| sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym); |
| assemble_variable (decl, 1, 1, 1); |
| assemble_integer (sym_ref, POINTER_SIZE_UNITS, POINTER_SIZE, 1); |
| |
| return 0; |
| } |
| |
| /* Emit the constants queued through dw2_force_const_mem. */ |
| |
| void |
| dw2_output_indirect_constants (void) |
| { |
| if (!indirect_pool) |
| return; |
| |
| auto_vec<std::pair<const char *, tree> > temp (indirect_pool->elements ()); |
| for (hash_map<const char *, tree>::iterator iter = indirect_pool->begin (); |
| iter != indirect_pool->end (); ++iter) |
| temp.quick_push (*iter); |
| |
| temp.qsort (compare_strings); |
| |
| for (unsigned int i = 0; i < temp.length (); i++) |
| dw2_output_indirect_constant_1 (temp[i].first, temp[i].second); |
| } |
| |
| /* 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 is_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); |
| va_end (ap); |
| 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, is_public); |
| encoding &= ~DW_EH_PE_indirect; |
| goto restart; |
| } |
| |
| switch (encoding & 0xF0) |
| { |
| case DW_EH_PE_absptr: |
| dw2_assemble_integer (size, addr); |
| break; |
| |
| #ifdef ASM_OUTPUT_DWARF_DATAREL |
| case DW_EH_PE_datarel: |
| gcc_assert (GET_CODE (addr) == SYMBOL_REF); |
| ASM_OUTPUT_DWARF_DATAREL (asm_out_file, size, XSTR (addr, 0)); |
| break; |
| #endif |
| |
| 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" |