===================================================================
@@ -0,0 +1,4 @@
+/* { dg-do compile { target arm*-*-eabi* } } */
+/* { dg-final { scan-assembler "\\.size\[\\t \]+static_foo, 4" } } */
+int foo;
+static int static_foo;
===================================================================
@@ -81,6 +81,8 @@
ASM_OUTPUT_ALIGN (FILE, floor_log2 (ALIGN / BITS_PER_UNIT)); \
ASM_OUTPUT_LABEL (FILE, NAME); \
fprintf (FILE, "\t.space\t%d\n", SIZE ? (int)(SIZE) : 1); \
+ fprintf (FILE, "\t.size\t%s, %d\n", \
+ NAME, SIZE ? (int)(SIZE) : 1); \
} \
while (0)
This is a simple patch that ensures that a .size directive is emitted when space is allocated for a static variable in the BSS on bare-metal ARM targets. This allows other tools such as GDB to look up the size of the object correctly. Before: $ readelf -s pr26702.o Symbol table '.symtab' contains 10 entries: Num: Value Size Type Bind Vis Ndx Name ... 6: 00000000 0 NOTYPE LOCAL DEFAULT 3 static_foo ... After: $ readelf -s pr26702.o Symbol table '.symtab' contains 10 entries: Num: Value Size Type Bind Vis Ndx Name ... 6: 00000000 4 NOTYPE LOCAL DEFAULT 3 static_foo ... The testsuite has been run with a i686-pc-linux-gnu hosted cross-compiler targetted at arm-none-eabi with no regressions. Kwok 2015-03-30 Kwok Cheung Yeung <kcy@codesourcery.com> gcc/ PR target/26702 * config/arm/unknown-elf.h (ASM_OUTPUT_ALIGNED_DECL_LOCAL): Emit size of local. gcc/testsuite/ PR target/26702 * gcc.target/arm/pr26702.c: New test.