Re-introduce '_start' labels and add alignment in dw2-dir-file-name test case.
On ppc64-linux a function symbol does not point to code, but to the function descriptor. Thus the previous change for this test case broke it: https://sourceware.org/ml/gdb-patches/2014-01/msg00275.html This patch reverts to the original method, re-introducing '_start' symbols. In addition, it adds sufficient alignment before the label, such that the label never points into an alignment gap. gdb/testsuite/ChangeLog: * gdb.dwarf2/dw2-dir-file-name.c (FUNC): Insert alignment and define "*_start" label. Make "name" static. * gdb.dwarf2/dw2-dir-file-name.exp: Replace references to ${name} by references to ${name}_start.
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@ -1,3 +1,10 @@
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2014-01-22 Andreas Arnez <arnez@vnet.linux.ibm.com>
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* gdb.dwarf2/dw2-dir-file-name.c (FUNC): Insert alignment and
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define "*_start" label. Make "name" static.
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* gdb.dwarf2/dw2-dir-file-name.exp: Replace references to
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${name} by references to ${name}_start.
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2014-01-22 Andreas Arnez <arnez@vnet.linux.ibm.com>
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* gdb.base/info-macros.exp: Remove "debug" from the compile
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@ -63,8 +63,16 @@ FUNC (compdir_absolute_ldir_absolute_file_relative_different) \
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FUNC (compdir_absolute_ldir_absolute_file_absolute_same) \
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FUNC (compdir_absolute_ldir_absolute_file_absolute_different)
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/* Notes: (1) The '*_start' label below is needed because 'name' may
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point to a function descriptor instead of to the actual code. (2)
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The '.balign' should specify the highest possible function
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alignment across all supported architectures, such that the label
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never points into the alignment gap. */
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#define FUNC(name) \
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void \
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asm (".balign 8"); \
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asm (#name "_start: .globl " #name "_start\n"); \
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static void \
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name (void) \
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{ \
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v++; \
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@ -54,7 +54,7 @@ proc out_cu { name cu_dir cu_name line_dir line_name } {
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.ascii \"GNU C\\0\" /* DW_AT_producer */
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.byte 2 /* DW_AT_language (DW_LANG_C) */
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.4byte .Lline_${name}_begin /* DW_AT_stmt_list */
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.4byte ${name} /* DW_AT_low_pc */
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.4byte ${name}_start /* DW_AT_low_pc */
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.4byte ${name}_end /* DW_AT_high_pc */
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"
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if { $cu_dir != "" } {
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@ -65,7 +65,7 @@ proc out_cu { name cu_dir cu_name line_dir line_name } {
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.uleb128 3 /* Abbrev: DW_TAG_subprogram */
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.asciz \"${name}\" /* DW_AT_name */
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.4byte ${name} /* DW_AT_low_pc */
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.4byte ${name}_start /* DW_AT_low_pc */
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.4byte ${name}_end /* DW_AT_high_pc */
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.byte 0 /* End of children of CU */
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@ -122,7 +122,7 @@ proc out_line { name cu_dir cu_name line_dir line_name } {
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.byte 0 /* DW_LNE_set_address */
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.uleb128 5
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.byte 2
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.4byte ${name}
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.4byte ${name}_start
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.byte 1 /* DW_LNS_copy */
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.byte 3 /* DW_LNS_advance_line */
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.sleb128 1 /* ... to 1000 */
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