#include "config.h"
#include "system.h"
#include "flags.h"
+#include "tree.h"
#include "rtl.h"
#include "output.h"
#include "dwarf2asm.h"
+#include "dwarf2.h"
+#include "splay-tree.h"
+#include "ggc.h"
#include "tm_p.h"
}
#endif /* UNALIGNED_INT_ASM_OP */
+/* Output an immediate constant in a given size. */
+
void
dw2_asm_output_data VPARAMS ((int size, unsigned HOST_WIDE_INT value,
const char *comment, ...))
comment = va_arg (ap, const char *);
#endif
+ if (size * 8 < HOST_BITS_PER_WIDE_INT)
+ value &= ~(~(unsigned HOST_WIDE_INT)0 << (size * 8));
+
#ifdef UNALIGNED_INT_ASM_OP
fputs (unaligned_integer_asm_op (size), asm_out_file);
fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX, value);
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 VPARAMS ((int size, const char *lab1, const char *lab2,
const char *comment, ...))
va_end (ap);
}
+/* Output a section-relative reference to a label. 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 VPARAMS ((int size, const char *label,
const char *comment, ...))
comment = va_arg (ap, const char *);
#endif
+#ifdef ASM_OUTPUT_DWARF_OFFSET
+ ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label);
+#else
#ifdef UNALIGNED_INT_ASM_OP
fputs (unaligned_integer_asm_op (size), asm_out_file);
assemble_name (asm_out_file, label);
#else
assemble_integer (gen_rtx_SYMBOL_REF (Pmode, label), size, 1);
#endif
+#endif
if (flag_debug_asm && comment)
{
va_end (ap);
}
+/* Output a self-relative reference to a label, possibly in a
+ different section or object file. */
+
void
dw2_asm_output_pcrel VPARAMS ((int size, const char *label,
const char *comment, ...))
comment = va_arg (ap, const char *);
#endif
+#ifdef ASM_OUTPUT_DWARF_PCREL
+ ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, label);
+#else
#ifdef UNALIGNED_INT_ASM_OP
fputs (unaligned_integer_asm_op (size), asm_out_file);
-
- /* ??? This needs target conditionalization. E.g. the solaris
- assembler uses %r_disp32(label). Others don't like "." and
- we need to generate a temporary label here. */
assemble_name (asm_out_file, label);
fputc ('-', asm_out_file);
fputc ('.', asm_out_file);
#else
abort ();
#endif
+#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 an absolute reference to a label. */
+
+void
+dw2_asm_output_addr VPARAMS ((int size, const char *label,
+ const char *comment, ...))
+{
+#ifndef ANSI_PROTOTYPES
+ int size;
+ const char *label;
+ const char *comment;
+#endif
+ va_list ap;
+
+ VA_START (ap, comment);
+
+#ifndef ANSI_PROTOTYPES
+ size = va_arg (ap, int);
+ label = va_arg (ap, const char *);
+ comment = va_arg (ap, const char *);
+#endif
+
+#ifdef UNALIGNED_INT_ASM_OP
+ fputs (unaligned_integer_asm_op (size), asm_out_file);
+ assemble_name (asm_out_file, label);
+#else
+ assemble_integer (gen_rtx_SYMBOL_REF (Pmode, label), size, 1);
+#endif
if (flag_debug_asm && comment)
{
va_end (ap);
}
+/* Similar, but use an RTX expression instead of a text label. */
+
void
dw2_asm_output_addr_rtx VPARAMS ((int size, rtx addr,
const char *comment, ...))
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 (encoding)
+ 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;
+ }
+ abort ();
+}
+
+/* Yield a name for a given pointer encoding. */
+
+const char *
+eh_data_format_name (format)
+ 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_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
+ };
+
+ if (format < 0 || format > 0xff || format_names[format] == NULL)
+ abort ();
+ return format_names[format];
+#else
+ }
+ abort ();
+#endif
+}
+
/* Output an unsigned LEB128 quantity. */
void
#endif
#ifdef HAVE_AS_LEB128
- fputs ("\t.uleb128\t", asm_out_file);
+ fputs ("\t.uleb128 ", asm_out_file);
fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX, value);
if (flag_debug_asm && comment)
#endif
#ifdef HAVE_AS_LEB128
- fputs ("\t.sleb128\t", asm_out_file);
- fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX, value);
+ fputs ("\t.sleb128 ", asm_out_file);
+ fprintf (asm_out_file, HOST_WIDE_INT_PRINT_DEC, value);
if (flag_debug_asm && comment)
{
#endif
#ifdef HAVE_AS_LEB128
- fputs ("\t.uleb128\t", asm_out_file);
+ fputs ("\t.uleb128 ", asm_out_file);
assemble_name (asm_out_file, lab1);
fputc ('-', asm_out_file);
assemble_name (asm_out_file, lab2);
#endif
#ifdef HAVE_AS_LEB128
- fputs ("\t.sleb128\t", asm_out_file);
+ fputs ("\t.sleb128 ", asm_out_file);
assemble_name (asm_out_file, lab1);
fputc ('-', asm_out_file);
assemble_name (asm_out_file, lab2);
va_end (ap);
}
+\f
+static rtx dw2_force_const_mem PARAMS ((rtx));
+static int dw2_output_indirect_constant_1 PARAMS ((splay_tree_node, void *));
+
+static splay_tree indirect_pool;
+
+/* 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. */
+
+static rtx
+dw2_force_const_mem (x)
+ rtx x;
+{
+ splay_tree_node node;
+ const char *const_sym;
+
+ if (! indirect_pool)
+ indirect_pool = splay_tree_new (splay_tree_compare_pointers, NULL, NULL);
+
+ if (GET_CODE (x) != SYMBOL_REF)
+ abort ();
+ node = splay_tree_lookup (indirect_pool, (splay_tree_key) XSTR (x, 0));
+ if (node)
+ const_sym = (const char *) node->value;
+ else
+ {
+ extern int const_labelno;
+ char label[32];
+ tree id;
+
+ ASM_GENERATE_INTERNAL_LABEL (label, "LC", const_labelno);
+ ++const_labelno;
+ const_sym = ggc_strdup (label);
+
+ id = maybe_get_identifier (XSTR (x, 0));
+ if (id)
+ TREE_SYMBOL_REFERENCED (id) = 1;
+
+ splay_tree_insert (indirect_pool, (splay_tree_key) XSTR (x, 0),
+ (splay_tree_value) const_sym);
+ }
+
+ return gen_rtx_SYMBOL_REF (Pmode, const_sym);
+}
+
+/* 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 (node, data)
+ splay_tree_node node;
+ void* data ATTRIBUTE_UNUSED;
+{
+ const char *label, *sym;
+ rtx sym_ref;
+
+ label = (const char *) node->value;
+ sym = (const char *) node->key;
+ sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym);
+
+ ASM_OUTPUT_LABEL (asm_out_file, label);
+ assemble_integer (sym_ref, POINTER_SIZE / BITS_PER_UNIT, 1);
+
+ return 0;
+}
+
+/* Emit the constants queued through dw2_force_const_mem. */
+
+void
+dw2_output_indirect_constants ()
+{
+ if (! indirect_pool)
+ return;
+
+ /* Assume that the whole reason we're emitting these symbol references
+ indirectly is that they contain dynamic relocations, and are thus
+ read-write. If there was no possibility of a dynamic relocation, we
+ might as well have used a direct relocation. */
+ data_section ();
+
+ /* Everything we're emitting is a pointer. Align appropriately. */
+ assemble_align (POINTER_SIZE);
+
+ splay_tree_foreach (indirect_pool, dw2_output_indirect_constant_1, NULL);
+}
+
+/* Like dw2_asm_output_addr_rtx, but encode the pointer as directed. */
+
+void
+dw2_asm_output_encoded_addr_rtx VPARAMS ((int encoding,
+ rtx addr,
+ const char *comment, ...))
+{
+#ifndef ANSI_PROTOTYPES
+ int encoding;
+ rtx addr;
+ const char *comment;
+#endif
+ va_list ap;
+ int size;
+
+ VA_START (ap, comment);
+
+#ifndef ANSI_PROTOTYPES
+ encoding = va_arg (ap, int);
+ addr = va_arg (ap, rtx);
+ comment = va_arg (ap, const char *);
+#endif
+
+ size = size_of_encoded_value (encoding);
+
+ /* NULL is _always_ represented as a plain zero. */
+ if (addr == const0_rtx)
+ assemble_integer (addr, size, 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,
+ or better, across the entire application (or DSO). */
+ addr = dw2_force_const_mem (addr);
+ encoding &= ~DW_EH_PE_indirect;
+ goto restart;
+ }
+
+ switch (encoding & 0xF0)
+ {
+ case DW_EH_PE_absptr:
+#ifdef UNALIGNED_INT_ASM_OP
+ fputs (unaligned_integer_asm_op (size), asm_out_file);
+ output_addr_const (asm_out_file, addr);
+#else
+ assemble_integer (addr, size, 1);
+#endif
+ break;
+
+ case DW_EH_PE_pcrel:
+ if (GET_CODE (addr) != SYMBOL_REF)
+ abort ();
+#ifdef ASM_OUTPUT_DWARF_PCREL
+ ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, XSTR (addr, 0));
+#else
+#ifdef UNALIGNED_INT_ASM_OP
+ fputs (unaligned_integer_asm_op (size), asm_out_file);
+ assemble_name (asm_out_file, XSTR (addr, 0));
+ fputc ('-', asm_out_file);
+ fputc ('.', asm_out_file);
+#else
+ abort ();
+#endif
+#endif
+ break;
+
+ default:
+ /* Other encodings should have been handled by
+ ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX. */
+ abort ();
+ }
+
+#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);
+}
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