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diff -Naurp gcc/config/avr/avr.c gcc/config/avr/avr.c
--- gcc/config/avr/avr.c 2011-06-09 15:41:06.000000000 -0500
+++ gcc/config/avr/avr.c 2011-06-09 15:46:03.000000000 -0500
@@ -81,6 +81,12 @@ static rtx avr_function_value (const_tre
static void avr_insert_attributes (tree, tree *);
static void avr_asm_init_sections (void);
static unsigned int avr_section_type_flags (tree, const char *, int);
+static void avr_asm_named_section (const char *name, unsigned int flags, tree decl);
+/* Track if code will use .bss and/or .data */
+static int avr_need_clear_bss_p = 0;
+static int avr_need_copy_data_p = 0;
+static void avr_output_data_section_asm_op (const void*);
+static void avr_output_bss_section_asm_op (const void*);
static void avr_reorg (void);
static void avr_asm_out_ctor (rtx, int);
@@ -6102,6 +6108,54 @@ avr_output_progmem_section_asm_op (const
fprintf (asm_out_file, "\t.p2align 1\n");
}
+/* ASM_OUTPUT_COMMON */
+/* Track need of __do_clear_bss */
+
+void
+avr_asm_output_common (FILE *stream, const char *name,
+ unsigned HOST_WIDE_INT size,
+ unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
+{
+ avr_need_clear_bss_p = 1;
+ fputs ("\t.comm ", stream);
+ assemble_name (stream, name);
+ fprintf (stream, ",%lu,1\n", (unsigned long) size);
+}
+
+/* ASM_OUTPUT_LOCAL */
+/* Track need of __do_clear_bss */
+
+void
+avr_asm_output_local (FILE *stream, const char *name,
+ unsigned HOST_WIDE_INT size,
+ unsigned HOST_WIDE_INT rounded ATTRIBUTE_UNUSED)
+{
+ avr_need_clear_bss_p = 1;
+ fputs ("\t.lcomm ", stream);
+ assemble_name (stream, name);
+ fprintf (stream, ",%d\n", (int) size);
+}
+
+/* Unnamed section callback to track need of __do_copy_data */
+
+static void
+avr_output_data_section_asm_op (const void *data)
+{
+ avr_need_copy_data_p = 1;
+ /* Dispatch to default */
+ output_section_asm_op (data);
+}
+
+/* Unnamed section callback to track need of __do_clear_bss */
+
+static void
+avr_output_bss_section_asm_op (const void *data)
+{
+ avr_need_clear_bss_p = 1;
+ /* Dispatch to default */
+ output_section_asm_op (data);
+}
+
/* Implement TARGET_ASM_INIT_SECTIONS. */
static void
@@ -6111,6 +6165,27 @@ avr_asm_init_sections (void)
avr_output_progmem_section_asm_op,
NULL);
readonly_data_section = data_section;
+
+ data_section->unnamed.callback = avr_output_data_section_asm_op;
+ bss_section->unnamed.callback = avr_output_bss_section_asm_op;
+}
+
+/* TARGET_ASM_NAMED_SECTION */
+/* Track need of __do_clear_bss, __do_copy_data for named sections */
+
+static void
+avr_asm_named_section (const char *name, unsigned int flags, tree decl)
+{
+ if (!avr_need_copy_data_p)
+ avr_need_copy_data_p =
+ (0 == strncmp (name, ".data", 5)
+ || 0 == strncmp (name, ".rodata", 7)
+ || 0 == strncmp (name, ".gnu.linkonce.", 14));
+
+ if (!avr_need_clear_bss_p)
+ avr_need_clear_bss_p = (0 == strncmp (name, ".bss", 4));
+
+ default_elf_asm_named_section (name, flags, decl);
}
static unsigned int
@@ -6152,12 +6227,6 @@ avr_file_start (void)
AVR_TINY ? fputs ("__tmp_reg__ = 16\n"
"__zero_reg__ = 17\n", asm_out_file) : fputs ("__tmp_reg__ = 0\n"
"__zero_reg__ = 1\n", asm_out_file);
-
- /* FIXME: output these only if there is anything in the .data / .bss
- sections - some code size could be saved by not linking in the
- initialization code from libgcc if one or both sections are empty. */
- fputs ("\t.global __do_copy_data\n", asm_out_file);
- fputs ("\t.global __do_clear_bss\n", asm_out_file);
}
/* Outputs to the stdio stream FILE some
@@ -6166,6 +6235,16 @@ avr_file_start (void)
static void
avr_file_end (void)
{
+ /* Output these only if there is anything in the
+ .data* / .rodata* / .gnu.linkonce.* resp. .bss*
+ input section(s) - some code size can be saved by not
+ linking in the initialization code from libgcc if resp.
+ sections are empty. */
+ if (avr_need_copy_data_p)
+ fputs (".global __do_copy_data\n", asm_out_file);
+
+ if (avr_need_clear_bss_p)
+ fputs (".global __do_clear_bss\n", asm_out_file);
}
/* Choose the order in which to allocate hard registers for
diff -Naurp gcc/config/avr/avr.h gcc/config/avr/avr.h
--- gcc/config/avr/avr.h 2011-06-09 14:30:33.000000000 -0500
+++ gcc/config/avr/avr.h 2011-06-09 15:46:03.000000000 -0500
@@ -562,7 +562,7 @@ do { \
#define ASM_APP_OFF "/* #NOAPP */\n"
/* Switch into a generic section. */
-#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section
+#define TARGET_ASM_NAMED_SECTION avr_asm_named_section
#define TARGET_ASM_INIT_SECTIONS avr_asm_init_sections
#define ASM_OUTPUT_ASCII(FILE, P, SIZE) gas_output_ascii (FILE,P,SIZE)
@@ -570,21 +570,13 @@ do { \
#define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) ((C) == '\n' || ((C) == '$'))
#define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) \
-do { \
- fputs ("\t.comm ", (STREAM)); \
- assemble_name ((STREAM), (NAME)); \
- fprintf ((STREAM), ",%lu,1\n", (unsigned long)(SIZE)); \
-} while (0)
+ avr_asm_output_common (STREAM, NAME, SIZE, ROUNDED)
#define ASM_OUTPUT_BSS(FILE, DECL, NAME, SIZE, ROUNDED) \
asm_output_bss ((FILE), (DECL), (NAME), (SIZE), (ROUNDED))
#define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) \
-do { \
- fputs ("\t.lcomm ", (STREAM)); \
- assemble_name ((STREAM), (NAME)); \
- fprintf ((STREAM), ",%d\n", (int)(SIZE)); \
-} while (0)
+ avr_asm_output_local (STREAM, NAME, SIZE, ROUNDED)
#undef TYPE_ASM_OP
#undef SIZE_ASM_OP
diff -Naurp gcc/config/avr/avr-protos.h gcc/config/avr/avr-protos.h
--- gcc/config/avr/avr-protos.h 2011-06-09 14:30:33.000000000 -0500
+++ gcc/config/avr/avr-protos.h 2011-06-09 15:46:03.000000000 -0500
@@ -35,6 +35,9 @@ extern int avr_simple_epilogue (void);
extern void gas_output_limited_string (FILE *file, const char *str);
extern void gas_output_ascii (FILE *file, const char *str, size_t length);
extern int avr_hard_regno_rename_ok (unsigned int, unsigned int);
+extern void avr_asm_output_common (FILE *stream, const char *name, unsigned HOST_WIDE_INT size, unsigned HOST_WIDE_INT rounded);
+extern void avr_asm_output_local (FILE *stream, const char *name, unsigned HOST_WIDE_INT size, unsigned HOST_WIDE_INT rounded);
+
extern rtx avr_return_addr_rtx (int count, const_rtx tem);
#ifdef TREE_CODE
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