/* Dwarf2 assembler output helper routines.
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008
- Free Software Foundation, Inc.
+ Copyright (C) 2001-2019 Free Software Foundation, Inc.
This file is part of GCC.
#include "config.h"
#include "system.h"
#include "coretypes.h"
-#include "tm.h"
-#include "flags.h"
-#include "tree.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 "target.h"
#include "dwarf2asm.h"
-#include "elf/dwarf2.h"
-#include "splay-tree.h"
-#include "ggc.h"
-#include "tm_p.h"
-
+#include "dwarf2.h"
+#include "function.h"
+#include "emit-rtl.h"
+#include "fold-const.h"
-/* How to start an assembler comment. */
-#ifndef ASM_COMMENT_START
-#define ASM_COMMENT_START ";#"
+#ifndef XCOFF_DEBUGGING_INFO
+#define XCOFF_DEBUGGING_INFO 0
#endif
\f
{
fputs (op, asm_out_file);
if (CONST_INT_P (x))
- fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX,
- (unsigned HOST_WIDE_INT) INTVAL (x));
+ fprint_whex (asm_out_file, (unsigned HOST_WIDE_INT) INTVAL (x));
else
output_addr_const (asm_out_file, x);
}
if (BYTES_BIG_ENDIAN)
{
for (i = size - 1; i > 0; --i)
- fprintf (asm_out_file, "0x%x,", bytes[i]);
- fprintf (asm_out_file, "0x%x", bytes[0]);
+ 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, "0x%x,", bytes[i]);
- fprintf (asm_out_file, "0x%x", bytes[i]);
+ fprintf (asm_out_file, "%#x,", bytes[i]);
+ fprintf (asm_out_file, "%#x", bytes[i]);
}
}
va_start (ap, comment);
if (size * 8 < HOST_BITS_PER_WIDE_INT)
- value &= ~(~(unsigned HOST_WIDE_INT) 0 << (size * 8));
+ value &= ~(HOST_WIDE_INT_M1U << (size * 8));
if (op)
- fprintf (asm_out_file, "%s" HOST_WIDE_INT_PRINT_HEX, op, value);
+ {
+ 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)
{
- fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
+ fputs ("\t" ASM_COMMENT_START " ", asm_out_file);
vfprintf (asm_out_file, comment, ap);
}
- fputc ('\n', asm_out_file);
+ putc ('\n', asm_out_file);
va_end (ap);
}
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
va_start (ap, comment);
#ifdef ASM_OUTPUT_DWARF_OFFSET
- ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label, base);
+ ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label, 0, base);
#else
dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label));
#endif
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
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, ...)
if (flag_debug_asm && comment)
{
- fputs ("\t.ascii \"", asm_out_file);
+ 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 == '\"' || c == '\\')
+ if (c == '\"')
+ fputc (XCOFF_DEBUGGING_INFO ? '\"' : '\\', asm_out_file);
+ else if (c == '\\')
fputc ('\\', asm_out_file);
- if (ISPRINT(c))
+ if (ISPRINT (c))
fputc (c, asm_out_file);
else
fprintf (asm_out_file, "\\%o", c);
switch (encoding & 0x07)
{
case DW_EH_PE_absptr:
- return POINTER_SIZE / BITS_PER_UNIT;
+ return POINTER_SIZE_UNITS;
case DW_EH_PE_udata2:
return 2;
case DW_EH_PE_udata4:
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,
};
gcc_assert (format >= 0 && format < 0x100 && format_names[format]);
-
+
return format_names[format];
#else
}
/* More bytes to follow. */
byte |= 0x80;
- fprintf (asm_out_file, "0x%x", byte);
+ fprintf (asm_out_file, "%#x", byte);
if (value == 0)
break;
fputc (',', asm_out_file);
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)
+ if (HAVE_AS_LEB128)
{
- 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 ("\t.uleb128 ", asm_out_file);
+ fprint_whex (asm_out_file, value);
+
+ if (flag_debug_asm && comment)
{
- fputs ("; ", asm_out_file);
+ fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
vfprintf (asm_out_file, comment, ap);
}
}
- }
-#endif
- fputc ('\n', asm_out_file);
+ 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);
}
if (more)
byte |= 0x80;
- fprintf (asm_out_file, "0x%x", byte);
+ fprintf (asm_out_file, "%#x", byte);
if (!more)
break;
fputc (',', asm_out_file);
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);
+}
+
+/* Output symbol LAB1 as an unsigned LEB128 quantity. LAB1 should be
+ an assembler-computed constant, e.g. a view number, because we
+ can't have relocations in LEB128 quantities. */
+
+void
+dw2_asm_output_symname_uleb128 (const char *lab1 ATTRIBUTE_UNUSED,
+ 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);
+ fputs ("\t.uleb128 ", asm_out_file);
+ assemble_name (asm_out_file, lab1);
+#else
+ gcc_unreachable ();
+#endif
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);
va_start (ap, comment);
-#ifdef HAVE_AS_LEB128
+ gcc_assert (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
+ putc ('-', asm_out_file);
+ /* dwarf2out.c might give us a label expression (e.g. .LVL548-1)
+ as second argument. If so, make it a subexpression, to make
+ sure the substraction is done in the right order. */
+ if (strchr (lab2, '-') != NULL)
+ {
+ putc ('(', asm_out_file);
+ assemble_name (asm_out_file, lab2);
+ putc (')', asm_out_file);
+ }
+ else
+ assemble_name (asm_out_file, lab2);
if (flag_debug_asm && comment)
{
va_start (ap, comment);
-#ifdef HAVE_AS_LEB128
+ gcc_assert (HAVE_AS_LEB128);
+
fputs ("\t.sleb128 ", asm_out_file);
assemble_name (asm_out_file, lab1);
- fputc ('-', asm_out_file);
+ putc ('-', asm_out_file);
assemble_name (asm_out_file, lab2);
-#else
- gcc_unreachable ();
-#endif
if (flag_debug_asm && comment)
{
}
#endif /* 0 */
\f
-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(()) hash_map<const char *, tree> *indirect_pool;
static GTY(()) int dw2_const_labelno;
-#if defined(HAVE_GAS_HIDDEN) && defined(SUPPORTS_ONE_ONLY)
-# define USE_LINKONCE_INDIRECT 1
+#if defined(HAVE_GAS_HIDDEN)
+# define USE_LINKONCE_INDIRECT (SUPPORTS_ONE_ONLY && !XCOFF_DEBUGGING_INFO)
#else
# define USE_LINKONCE_INDIRECT 0
#endif
-/* Comparison function for a splay tree in which the keys are strings.
- K1 and K2 have the dynamic type "const char *". Returns <0, 0, or
+/* 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
-splay_tree_compare_strings (splay_tree_key k1, splay_tree_key k2)
+compare_strings (const void *a, const void *b)
{
- const char *s1 = (const char *)k1;
- const char *s2 = (const char *)k2;
+ 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)
rtx
dw2_force_const_mem (rtx x, bool is_public)
{
- splay_tree_node node;
const char *key;
tree decl_id;
if (! indirect_pool)
- /* We use strcmp, rather than just comparing pointers, so that the
- sort order will not depend on the host system. */
- indirect_pool = splay_tree_new_ggc (splay_tree_compare_strings);
+ indirect_pool = hash_map<const char *, tree>::create_ggc (64);
gcc_assert (GET_CODE (x) == SYMBOL_REF);
key = XSTR (x, 0);
- node = splay_tree_lookup (indirect_pool, (splay_tree_key) key);
- if (node)
- decl_id = (tree) node->value;
+ tree *slot = indirect_pool->get (key);
+ if (slot)
+ decl_id = *slot;
else
{
tree id;
if (id)
TREE_SYMBOL_REFERENCED (id) = 1;
- splay_tree_insert (indirect_pool, (splay_tree_key) key,
- (splay_tree_value) decl_id);
+ indirect_pool->put (key, decl_id);
}
return gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (decl_id));
}
-/* A helper function for dw2_output_indirect_constants called through
- splay_tree_foreach. Emit one queued constant to memory. */
+/* A helper function for dw2_output_indirect_constants. Emit one queued
+ constant to memory. */
static int
-dw2_output_indirect_constant_1 (splay_tree_node node,
- void *data ATTRIBUTE_UNUSED)
+dw2_output_indirect_constant_1 (const char *sym, tree id)
{
- const char *sym;
rtx sym_ref;
- tree id, decl;
-
- sym = (const char *) node->key;
- id = (tree) node->value;
+ 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;
+ DECL_INITIAL (decl) = build_fold_addr_expr (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;
}
- else
- TREE_STATIC (decl) = 1;
sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym);
- sym = targetm.strip_name_encoding (sym);
- if (TREE_PUBLIC (decl) && USE_LINKONCE_INDIRECT)
- fprintf (asm_out_file, "\t.hidden %sDW.ref.%s\n", user_label_prefix, sym);
+ /* Disable ASan for decl because redzones cause ABI breakage between GCC and
+ libstdc++ for `.LDFCM*' variables. See PR 78651 for details. */
+ unsigned int save_flag_sanitize = flag_sanitize;
+ flag_sanitize &= ~(SANITIZE_ADDRESS | SANITIZE_USER_ADDRESS
+ | SANITIZE_KERNEL_ADDRESS);
+ /* And also temporarily disable -fsection-anchors. These indirect constants
+ are never referenced from code, so it doesn't make any sense to aggregate
+ them in blocks. */
+ int save_flag_section_anchors = flag_section_anchors;
+ flag_section_anchors = 0;
assemble_variable (decl, 1, 1, 1);
- assemble_integer (sym_ref, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
+ flag_section_anchors = save_flag_section_anchors;
+ flag_sanitize = save_flag_sanitize;
+ assemble_integer (sym_ref, POINTER_SIZE_UNITS, POINTER_SIZE, 1);
+ /* The following is a hack recognized by use_blocks_for_decl_p to disable
+ section anchor handling of the decl. */
+ DECL_INITIAL (decl) = decl;
return 0;
}
void
dw2_output_indirect_constants (void)
{
- if (indirect_pool)
- splay_tree_foreach (indirect_pool, dw2_output_indirect_constant_1, NULL);
+ 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.
{
assemble_align (POINTER_SIZE);
assemble_integer (addr, size, POINTER_SIZE, 1);
+ va_end (ap);
return;
}
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
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