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[patch 2/2] Support gcc-4.7 DW_OP_GNU_parameter_ref
- From: Jan Kratochvil <jan dot kratochvil at redhat dot com>
- To: gdb-patches at sourceware dot org
- Date: Thu, 14 Jun 2012 08:48:48 +0200
- Subject: [patch 2/2] Support gcc-4.7 DW_OP_GNU_parameter_ref
Hi,
this add-on to gdb.arch/amd64-entry-value.exp has been somehow forgotten:
[PATCH] Improve debug info for IPA-SRA optimized code - add DW_OP_GNU_parameter_ref support (PR debug/47858)
http://gcc.gnu.org/ml/gcc-patches/2011-06/msg00649.html
And for gcc-4.7+ -O2 -g code GDB may print (instead of the calculated value):
(gdb) p y
Unhandled dwarf expression opcode 0xfa
The support is pretty simple, there is just now third kind of binding between
callers and callees parameter values.
No regressions on {x86_64,x86_64-m32,i686}-fedora17-linux-gnu.
Thanks,
Jan
gdb/
2012-06-14 Jan Kratochvil <jan.kratochvil@redhat.com>
* dwarf2expr.c (execute_stack_op): Support DW_OP_GNU_parameter_ref.
* dwarf2loc.c (call_site_parameter_matches): Support
CALL_SITE_PARAMETER_PARAM_OFFSET.
(needs_dwarf_reg_entry_value): Push stub value.
* dwarf2read.c (read_call_site_scope): New variable origin. Support
CALL_SITE_PARAMETER_PARAM_OFFSET and its DW_AT_abstract_origin.
* gdbtypes.h (enum call_site_parameter_kind): New item
CALL_SITE_PARAMETER_PARAM_OFFSET.
(struct call_site.parameter.u): New field param_offset.
gdb/testsuite/
2012-06-14 Jan Kratochvil <jan.kratochvil@redhat.com>
* gdb.arch/amd64-entry-value-param.S: New file.
* gdb.arch/amd64-entry-value-param.c: New file.
* gdb.arch/amd64-entry-value-param.exp: New file.
--- a/gdb/dwarf2expr.c
+++ b/gdb/dwarf2expr.c
@@ -1392,6 +1392,21 @@ execute_stack_op (struct dwarf_expr_context *ctx,
"or for DW_OP_breg*(0)+DW_OP_deref*"));
}
+ case DW_OP_GNU_parameter_ref:
+ {
+ cu_offset offset;
+ union call_site_parameter_u kind_u;
+
+ kind_u.param_offset.cu_off = extract_unsigned_integer (op_ptr, 4,
+ byte_order);
+ op_ptr += 4;
+ ctx->funcs->push_dwarf_reg_entry_value (ctx,
+ CALL_SITE_PARAMETER_PARAM_OFFSET,
+ kind_u,
+ -1 /* deref_size */);
+ }
+ goto no_push;
+
case DW_OP_GNU_const_type:
{
cu_offset type_die;
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -943,6 +943,8 @@ call_site_parameter_matches (struct call_site_parameter *parameter,
return kind_u.dwarf_reg == parameter->u.dwarf_reg;
case CALL_SITE_PARAMETER_FB_OFFSET:
return kind_u.fb_offset == parameter->u.fb_offset;
+ case CALL_SITE_PARAMETER_PARAM_OFFSET:
+ return kind_u.param_offset.cu_off == parameter->u.param_offset.cu_off;
}
return 0;
}
@@ -2378,6 +2380,9 @@ needs_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
struct needs_frame_baton *nf_baton = ctx->baton;
nf_baton->needs_frame = 1;
+
+ /* The expression may require some stub values on DWARF stack. */
+ dwarf_expr_push_address (ctx, 0, 0);
}
/* DW_OP_GNU_addr_index doesn't require a frame. */
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -7816,7 +7816,7 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
child_die = sibling_die (child_die))
{
struct call_site_parameter *parameter;
- struct attribute *loc;
+ struct attribute *loc, *origin;
if (child_die->tag != DW_TAG_GNU_call_site_parameter)
{
@@ -7827,11 +7827,23 @@ read_call_site_scope (struct die_info *die, struct dwarf2_cu *cu)
gdb_assert (call_site->parameter_count < nparams);
parameter = &call_site->parameter[call_site->parameter_count];
- /* DW_AT_location specifies the register number. Value of the data
- assumed for the register is contained in DW_AT_GNU_call_site_value. */
+ /* DW_AT_location specifies the register number or DW_AT_abstract_origin
+ specifies DW_TAG_formal_parameter. Value of the data assumed for the
+ register is contained in DW_AT_GNU_call_site_value. */
loc = dwarf2_attr (child_die, DW_AT_location, cu);
- if (loc == NULL || !attr_form_is_block (loc))
+ origin = dwarf2_attr (child_die, DW_AT_abstract_origin, cu);
+ if (loc == NULL && origin != NULL && is_ref_attr (origin))
+ {
+ sect_offset offset;
+
+ parameter->kind = CALL_SITE_PARAMETER_PARAM_OFFSET;
+ offset = dwarf2_get_ref_die_offset (origin);
+ gdb_assert (offset.sect_off >= cu->header.offset.sect_off);
+ parameter->u.param_offset.cu_off = (offset.sect_off
+ - cu->header.offset.sect_off);
+ }
+ else if (loc == NULL || origin != NULL || !attr_form_is_block (loc))
{
complaint (&symfile_complaints,
_("No DW_FORM_block* DW_AT_location for "
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -924,7 +924,10 @@ enum call_site_parameter_kind
CALL_SITE_PARAMETER_DWARF_REG,
/* Use field call_site_parameter.u.fb_offset. */
- CALL_SITE_PARAMETER_FB_OFFSET
+ CALL_SITE_PARAMETER_FB_OFFSET,
+
+ /* Use field call_site_parameter.u.param_offset. */
+ CALL_SITE_PARAMETER_PARAM_OFFSET
};
/* A place where a function gets called from, represented by
@@ -971,6 +974,11 @@ struct call_site
/* Offset from the callee's frame base, for stack passed parameters.
This equals offset from the caller's stack pointer. */
CORE_ADDR fb_offset;
+
+ /* Offset relative to the start of this PER_CU to
+ DW_TAG_formal_parameter which is referenced by both caller and
+ the callee. */
+ cu_offset param_offset;
}
u;
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value-param.S
@@ -0,0 +1,611 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2012 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* This file is compiled from gdb.arch/amd64-entry-value-param.c
+ using -g -dA -S -O2. */
+
+ .file "amd64-entry-value-param.c"
+ .text
+.Ltext0:
+ .p2align 4,,15
+ .type foo.isra.0.constprop.2, @function
+foo.isra.0.constprop.2:
+.LFB4:
+ .file 1 "gdb.arch/amd64-entry-value-param.c"
+ /* gdb.arch/amd64-entry-value-param.c:21 */
+ .loc 1 21 0
+ .cfi_startproc
+.LVL0:
+/* BLOCK 2 freq:10000 seq:0 */
+/* PRED: ENTRY [100.0%] (fallthru) */
+ /* gdb.arch/amd64-entry-value-param.c:26 */
+ .loc 1 26 0
+ movl vv(%rip), %eax
+ addl $1, %eax
+ movl %eax, vv(%rip)
+ /* gdb.arch/amd64-entry-value-param.c:27 */
+ .loc 1 27 0
+ leal 3(%rdi), %eax
+/* SUCC: EXIT [100.0%] */
+ /* gdb.arch/amd64-entry-value-param.c:28 */
+ .loc 1 28 0
+ ret
+ .cfi_endproc
+.LFE4:
+ .size foo.isra.0.constprop.2, .-foo.isra.0.constprop.2
+ .p2align 4,,15
+ .type bar.constprop.1, @function
+bar.constprop.1:
+.LFB5:
+ /* gdb.arch/amd64-entry-value-param.c:31 */
+ .loc 1 31 0
+ .cfi_startproc
+/* BLOCK 2 freq:10000 seq:0 */
+/* PRED: ENTRY [100.0%] (fallthru) */
+.LVL1:
+ pushq %rbx
+.LCFI0:
+ .cfi_def_cfa_offset 16
+ .cfi_offset 3, -16
+ /* gdb.arch/amd64-entry-value-param.c:33 */
+ .loc 1 33 0
+ movl $10, %edi
+ call foo.isra.0.constprop.2
+.LVL2:
+ movl $10, %edi
+ movl %eax, %ebx
+ call foo.isra.0.constprop.2
+.LVL3:
+ movl $16, %edi
+ addl %eax, %ebx
+ call foo.isra.0.constprop.2
+.LVL4:
+ leal 10(%rbx,%rax), %eax
+ /* gdb.arch/amd64-entry-value-param.c:34 */
+ .loc 1 34 0
+ popq %rbx
+.LCFI1:
+ .cfi_def_cfa_offset 8
+/* SUCC: EXIT [100.0%] */
+ ret
+ .cfi_endproc
+.LFE5:
+ .size bar.constprop.1, .-bar.constprop.1
+ .section .text.startup,"ax",@progbits
+ .p2align 4,,15
+ .globl main
+ .type main, @function
+main:
+.LFB2:
+ /* gdb.arch/amd64-entry-value-param.c:38 */
+ .loc 1 38 0
+ .cfi_startproc
+/* BLOCK 2 freq:10000 seq:0 */
+/* PRED: ENTRY [100.0%] (fallthru) */
+ /* gdb.arch/amd64-entry-value-param.c:39 */
+ .loc 1 39 0
+ jmp bar.constprop.1
+/* SUCC: EXIT [100.0%] (ab,sibcall) */
+.LVL5:
+ .cfi_endproc
+.LFE2:
+ .size main, .-main
+ .comm vv,4,4
+ .text
+.Letext0:
+ .section .debug_info,"",@progbits
+.Ldebug_info0:
+ .4byte 0x1b7 /* Length of Compilation Unit Info */
+ .2byte 0x2 /* DWARF version number */
+ .4byte .Ldebug_abbrev0 /* Offset Into Abbrev. Section */
+ .byte 0x8 /* Pointer Size (in bytes) */
+ .uleb128 0x1 /* (DIE (0xb) DW_TAG_compile_unit) */
+ .4byte .LASF0 /* DW_AT_producer: "GNU C 4.7.1 20120612 (prerelease)" */
+ .byte 0x1 /* DW_AT_language */
+ .4byte .LASF1 /* DW_AT_name: "gdb.arch/amd64-entry-value-param.c" */
+ .4byte .LASF2 /* DW_AT_comp_dir: "" */
+ .4byte .Ldebug_ranges0+0 /* DW_AT_ranges */
+ .quad 0 /* DW_AT_low_pc */
+ .quad 0 /* DW_AT_entry_pc */
+ .4byte .Ldebug_line0 /* DW_AT_stmt_list */
+ .uleb128 0x2 /* (DIE (0x31) DW_TAG_subprogram) */
+ .ascii "foo\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x15 /* DW_AT_decl_line */
+ .byte 0x1 /* DW_AT_prototyped */
+ .4byte 0x79 /* DW_AT_type */
+ .byte 0 /* DW_AT_inline */
+ .4byte 0x79 /* DW_AT_sibling */
+ .uleb128 0x3 /* (DIE (0x42) DW_TAG_formal_parameter) */
+ .ascii "x\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x15 /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .uleb128 0x3 /* (DIE (0x4b) DW_TAG_formal_parameter) */
+ .ascii "y\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x15 /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .uleb128 0x3 /* (DIE (0x54) DW_TAG_formal_parameter) */
+ .ascii "z\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x15 /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .uleb128 0x4 /* (DIE (0x5d) DW_TAG_variable) */
+ .ascii "a\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x17 /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .uleb128 0x4 /* (DIE (0x66) DW_TAG_variable) */
+ .ascii "b\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x18 /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .uleb128 0x4 /* (DIE (0x6f) DW_TAG_variable) */
+ .ascii "c\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x19 /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .byte 0 /* end of children of DIE 0x31 */
+ .uleb128 0x5 /* (DIE (0x79) DW_TAG_base_type) */
+ .byte 0x4 /* DW_AT_byte_size */
+ .byte 0x5 /* DW_AT_encoding */
+ .ascii "int\0" /* DW_AT_name */
+ .uleb128 0x2 /* (DIE (0x80) DW_TAG_subprogram) */
+ .ascii "bar\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x1f /* DW_AT_decl_line */
+ .byte 0x1 /* DW_AT_prototyped */
+ .4byte 0x79 /* DW_AT_type */
+ .byte 0x1 /* DW_AT_inline */
+ .4byte 0x9b /* DW_AT_sibling */
+ .uleb128 0x3 /* (DIE (0x91) DW_TAG_formal_parameter) */
+ .ascii "x\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x1f /* DW_AT_decl_line */
+ .4byte 0x79 /* DW_AT_type */
+ .byte 0 /* end of children of DIE 0x80 */
+ .uleb128 0x6 /* (DIE (0x9b) DW_TAG_subprogram) */
+ .4byte 0x31 /* DW_AT_abstract_origin */
+ .quad .LFB4 /* DW_AT_low_pc */
+ .quad .LFE4 /* DW_AT_high_pc */
+ .byte 0x2 /* DW_AT_frame_base */
+ .byte 0x77 /* DW_OP_breg7 */
+ .sleb128 8
+ .byte 0x1 /* DW_AT_GNU_all_call_sites */
+ .4byte 0xf1 /* DW_AT_sibling */
+ .uleb128 0x7 /* (DIE (0xb8) DW_TAG_formal_parameter) */
+ .4byte 0x42 /* DW_AT_abstract_origin */
+ .byte 0x1 /* DW_AT_location */
+ .byte 0x55 /* DW_OP_reg5 */
+ .uleb128 0x7 /* (DIE (0xbf) DW_TAG_formal_parameter) */
+ .4byte 0x4b /* DW_AT_abstract_origin */
+ .byte 0x6 /* DW_AT_location */
+ .byte 0xfa /* DW_OP_GNU_parameter_ref */
+ .4byte 0x4b
+ .byte 0x9f /* DW_OP_stack_value */
+ .uleb128 0x8 /* (DIE (0xcb) DW_TAG_variable) */
+ .4byte 0x5d /* DW_AT_abstract_origin */
+ .byte 0x5 /* DW_AT_location */
+ .byte 0x75 /* DW_OP_breg5 */
+ .sleb128 0
+ .byte 0x31 /* DW_OP_lit1 */
+ .byte 0x24 /* DW_OP_shl */
+ .byte 0x9f /* DW_OP_stack_value */
+ .uleb128 0x8 /* (DIE (0xd6) DW_TAG_variable) */
+ .4byte 0x66 /* DW_AT_abstract_origin */
+ .byte 0x8 /* DW_AT_location */
+ .byte 0xfa /* DW_OP_GNU_parameter_ref */
+ .4byte 0x4b
+ .byte 0x31 /* DW_OP_lit1 */
+ .byte 0x24 /* DW_OP_shl */
+ .byte 0x9f /* DW_OP_stack_value */
+ .uleb128 0x9 /* (DIE (0xe4) DW_TAG_variable) */
+ .4byte 0x6f /* DW_AT_abstract_origin */
+ .byte 0x6 /* DW_AT_const_value */
+ .uleb128 0xa /* (DIE (0xea) DW_TAG_formal_parameter) */
+ .4byte 0x54 /* DW_AT_abstract_origin */
+ .byte 0x3 /* DW_AT_const_value */
+ .byte 0 /* end of children of DIE 0x9b */
+ .uleb128 0xb /* (DIE (0xf1) DW_TAG_subprogram) */
+ .4byte 0x80 /* DW_AT_abstract_origin */
+ .quad .LFB5 /* DW_AT_low_pc */
+ .quad .LFE5 /* DW_AT_high_pc */
+ .4byte .LLST0 /* DW_AT_frame_base */
+ .byte 0x1 /* DW_AT_GNU_all_call_sites */
+ .4byte 0x16c /* DW_AT_sibling */
+ .uleb128 0xa /* (DIE (0x10f) DW_TAG_formal_parameter) */
+ .4byte 0x91 /* DW_AT_abstract_origin */
+ .byte 0xa /* DW_AT_const_value */
+ .uleb128 0xc /* (DIE (0x115) DW_TAG_GNU_call_site) */
+ .quad .LVL2 /* DW_AT_low_pc */
+ .4byte 0x9b /* DW_AT_abstract_origin */
+ .4byte 0x133 /* DW_AT_sibling */
+ .uleb128 0xd /* (DIE (0x126) DW_TAG_GNU_call_site_parameter) */
+ .byte 0x1 /* DW_AT_location */
+ .byte 0x55 /* DW_OP_reg5 */
+ .byte 0x1 /* DW_AT_GNU_call_site_value */
+ .byte 0x3a /* DW_OP_lit10 */
+ .uleb128 0xe /* (DIE (0x12b) DW_TAG_GNU_call_site_parameter) */
+ .4byte 0x4b /* DW_AT_abstract_origin */
+ .byte 0x1 /* DW_AT_GNU_call_site_value */
+ .byte 0x32 /* DW_OP_lit2 */
+ .byte 0 /* end of children of DIE 0x115 */
+ .uleb128 0xc /* (DIE (0x133) DW_TAG_GNU_call_site) */
+ .quad .LVL3 /* DW_AT_low_pc */
+ .4byte 0x9b /* DW_AT_abstract_origin */
+ .4byte 0x151 /* DW_AT_sibling */
+ .uleb128 0xd /* (DIE (0x144) DW_TAG_GNU_call_site_parameter) */
+ .byte 0x1 /* DW_AT_location */
+ .byte 0x55 /* DW_OP_reg5 */
+ .byte 0x1 /* DW_AT_GNU_call_site_value */
+ .byte 0x3a /* DW_OP_lit10 */
+ .uleb128 0xe /* (DIE (0x149) DW_TAG_GNU_call_site_parameter) */
+ .4byte 0x4b /* DW_AT_abstract_origin */
+ .byte 0x1 /* DW_AT_GNU_call_site_value */
+ .byte 0x34 /* DW_OP_lit4 */
+ .byte 0 /* end of children of DIE 0x133 */
+ .uleb128 0xf /* (DIE (0x151) DW_TAG_GNU_call_site) */
+ .quad .LVL4 /* DW_AT_low_pc */
+ .4byte 0x9b /* DW_AT_abstract_origin */
+ .uleb128 0xd /* (DIE (0x15e) DW_TAG_GNU_call_site_parameter) */
+ .byte 0x1 /* DW_AT_location */
+ .byte 0x55 /* DW_OP_reg5 */
+ .byte 0x1 /* DW_AT_GNU_call_site_value */
+ .byte 0x40 /* DW_OP_lit16 */
+ .uleb128 0xe /* (DIE (0x163) DW_TAG_GNU_call_site_parameter) */
+ .4byte 0x4b /* DW_AT_abstract_origin */
+ .byte 0x1 /* DW_AT_GNU_call_site_value */
+ .byte 0x3a /* DW_OP_lit10 */
+ .byte 0 /* end of children of DIE 0x151 */
+ .byte 0 /* end of children of DIE 0xf1 */
+ .uleb128 0x10 /* (DIE (0x16c) DW_TAG_subprogram) */
+ .byte 0x1 /* DW_AT_external */
+ .4byte .LASF3 /* DW_AT_name: "main" */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x25 /* DW_AT_decl_line */
+ .byte 0x1 /* DW_AT_prototyped */
+ .4byte 0x79 /* DW_AT_type */
+ .quad .LFB2 /* DW_AT_low_pc */
+ .quad .LFE2 /* DW_AT_high_pc */
+ .byte 0x2 /* DW_AT_frame_base */
+ .byte 0x77 /* DW_OP_breg7 */
+ .sleb128 8
+ .byte 0x1 /* DW_AT_GNU_all_call_sites */
+ .4byte 0x1a0 /* DW_AT_sibling */
+ .uleb128 0x11 /* (DIE (0x191) DW_TAG_GNU_call_site) */
+ .quad .LVL5 /* DW_AT_low_pc */
+ .byte 0x1 /* DW_AT_GNU_tail_call */
+ .4byte 0xf1 /* DW_AT_abstract_origin */
+ .byte 0 /* end of children of DIE 0x16c */
+ .uleb128 0x12 /* (DIE (0x1a0) DW_TAG_variable) */
+ .ascii "vv\0" /* DW_AT_name */
+ .byte 0x1 /* DW_AT_decl_file (gdb.arch/amd64-entry-value-param.c) */
+ .byte 0x12 /* DW_AT_decl_line */
+ .4byte 0x1b5 /* DW_AT_type */
+ .byte 0x1 /* DW_AT_external */
+ .byte 0x9 /* DW_AT_location */
+ .byte 0x3 /* DW_OP_addr */
+ .quad vv
+ .uleb128 0x13 /* (DIE (0x1b5) DW_TAG_volatile_type) */
+ .4byte 0x79 /* DW_AT_type */
+ .byte 0 /* end of children of DIE 0xb */
+ .section .debug_abbrev,"",@progbits
+.Ldebug_abbrev0:
+ .uleb128 0x1 /* (abbrev code) */
+ .uleb128 0x11 /* (TAG: DW_TAG_compile_unit) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x25 /* (DW_AT_producer) */
+ .uleb128 0xe /* (DW_FORM_strp) */
+ .uleb128 0x13 /* (DW_AT_language) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0xe /* (DW_FORM_strp) */
+ .uleb128 0x1b /* (DW_AT_comp_dir) */
+ .uleb128 0xe /* (DW_FORM_strp) */
+ .uleb128 0x55 /* (DW_AT_ranges) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x52 /* (DW_AT_entry_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x10 /* (DW_AT_stmt_list) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x2 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x27 /* (DW_AT_prototyped) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x49 /* (DW_AT_type) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x20 /* (DW_AT_inline) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x3 /* (abbrev code) */
+ .uleb128 0x5 /* (TAG: DW_TAG_formal_parameter) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x49 /* (DW_AT_type) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x4 /* (abbrev code) */
+ .uleb128 0x34 /* (TAG: DW_TAG_variable) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x49 /* (DW_AT_type) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x5 /* (abbrev code) */
+ .uleb128 0x24 /* (TAG: DW_TAG_base_type) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0xb /* (DW_AT_byte_size) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3e /* (DW_AT_encoding) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .byte 0
+ .byte 0
+ .uleb128 0x6 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x40 /* (DW_AT_frame_base) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x7 /* (abbrev code) */
+ .uleb128 0x5 /* (TAG: DW_TAG_formal_parameter) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x2 /* (DW_AT_location) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .byte 0
+ .byte 0
+ .uleb128 0x8 /* (abbrev code) */
+ .uleb128 0x34 /* (TAG: DW_TAG_variable) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x2 /* (DW_AT_location) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .byte 0
+ .byte 0
+ .uleb128 0x9 /* (abbrev code) */
+ .uleb128 0x34 /* (TAG: DW_TAG_variable) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x1c /* (DW_AT_const_value) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .byte 0
+ .byte 0
+ .uleb128 0xa /* (abbrev code) */
+ .uleb128 0x5 /* (TAG: DW_TAG_formal_parameter) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x1c /* (DW_AT_const_value) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .byte 0
+ .byte 0
+ .uleb128 0xb /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x40 /* (DW_AT_frame_base) */
+ .uleb128 0x6 /* (DW_FORM_data4) */
+ .uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0xc /* (abbrev code) */
+ .uleb128 0x4109 /* (TAG: DW_TAG_GNU_call_site) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0xd /* (abbrev code) */
+ .uleb128 0x410a /* (TAG: DW_TAG_GNU_call_site_parameter) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x2 /* (DW_AT_location) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .uleb128 0x2111 /* (DW_AT_GNU_call_site_value) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .byte 0
+ .byte 0
+ .uleb128 0xe /* (abbrev code) */
+ .uleb128 0x410a /* (TAG: DW_TAG_GNU_call_site_parameter) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x2111 /* (DW_AT_GNU_call_site_value) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .byte 0
+ .byte 0
+ .uleb128 0xf /* (abbrev code) */
+ .uleb128 0x4109 /* (TAG: DW_TAG_GNU_call_site) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x10 /* (abbrev code) */
+ .uleb128 0x2e /* (TAG: DW_TAG_subprogram) */
+ .byte 0x1 /* DW_children_yes */
+ .uleb128 0x3f /* (DW_AT_external) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0xe /* (DW_FORM_strp) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x27 /* (DW_AT_prototyped) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x49 /* (DW_AT_type) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x12 /* (DW_AT_high_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x40 /* (DW_AT_frame_base) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .uleb128 0x2117 /* (DW_AT_GNU_all_call_sites) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x1 /* (DW_AT_sibling) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x11 /* (abbrev code) */
+ .uleb128 0x4109 /* (TAG: DW_TAG_GNU_call_site) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x11 /* (DW_AT_low_pc) */
+ .uleb128 0x1 /* (DW_FORM_addr) */
+ .uleb128 0x2115 /* (DW_AT_GNU_tail_call) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x31 /* (DW_AT_abstract_origin) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .uleb128 0x12 /* (abbrev code) */
+ .uleb128 0x34 /* (TAG: DW_TAG_variable) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x3 /* (DW_AT_name) */
+ .uleb128 0x8 /* (DW_FORM_string) */
+ .uleb128 0x3a /* (DW_AT_decl_file) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x3b /* (DW_AT_decl_line) */
+ .uleb128 0xb /* (DW_FORM_data1) */
+ .uleb128 0x49 /* (DW_AT_type) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .uleb128 0x3f /* (DW_AT_external) */
+ .uleb128 0xc /* (DW_FORM_flag) */
+ .uleb128 0x2 /* (DW_AT_location) */
+ .uleb128 0xa /* (DW_FORM_block1) */
+ .byte 0
+ .byte 0
+ .uleb128 0x13 /* (abbrev code) */
+ .uleb128 0x35 /* (TAG: DW_TAG_volatile_type) */
+ .byte 0 /* DW_children_no */
+ .uleb128 0x49 /* (DW_AT_type) */
+ .uleb128 0x13 /* (DW_FORM_ref4) */
+ .byte 0
+ .byte 0
+ .byte 0
+ .section .debug_loc,"",@progbits
+.Ldebug_loc0:
+.LLST0:
+ .quad .LFB5 /* Location list begin address (*.LLST0) */
+ .quad .LCFI0 /* Location list end address (*.LLST0) */
+ .2byte 0x2 /* Location expression size */
+ .byte 0x77 /* DW_OP_breg7 */
+ .sleb128 8
+ .quad .LCFI0 /* Location list begin address (*.LLST0) */
+ .quad .LCFI1 /* Location list end address (*.LLST0) */
+ .2byte 0x2 /* Location expression size */
+ .byte 0x77 /* DW_OP_breg7 */
+ .sleb128 16
+ .quad .LCFI1 /* Location list begin address (*.LLST0) */
+ .quad .LFE5 /* Location list end address (*.LLST0) */
+ .2byte 0x2 /* Location expression size */
+ .byte 0x77 /* DW_OP_breg7 */
+ .sleb128 8
+ .quad 0 /* Location list terminator begin (*.LLST0) */
+ .quad 0 /* Location list terminator end (*.LLST0) */
+ .section .debug_aranges,"",@progbits
+ .4byte 0x3c /* Length of Address Ranges Info */
+ .2byte 0x2 /* DWARF Version */
+ .4byte .Ldebug_info0 /* Offset of Compilation Unit Info */
+ .byte 0x8 /* Size of Address */
+ .byte 0 /* Size of Segment Descriptor */
+ .2byte 0 /* Pad to 16 byte boundary */
+ .2byte 0
+ .quad .Ltext0 /* Address */
+ .quad .Letext0-.Ltext0 /* Length */
+ .quad .LFB2 /* Address */
+ .quad .LFE2-.LFB2 /* Length */
+ .quad 0
+ .quad 0
+ .section .debug_ranges,"",@progbits
+.Ldebug_ranges0:
+ .quad .Ltext0 /* Offset 0 */
+ .quad .Letext0
+ .quad .LFB2 /* Offset 0x10 */
+ .quad .LFE2
+ .quad 0
+ .quad 0
+ .section .debug_line,"",@progbits
+.Ldebug_line0:
+ .section .debug_str,"MS",@progbits,1
+.LASF1:
+ .string "gdb.arch/amd64-entry-value-param.c"
+.LASF3:
+ .string "main"
+.LASF2:
+ .string ""
+.LASF0:
+ .string "GNU C 4.7.1 20120612 (prerelease)"
+ .ident "GCC: (GNU) 4.7.1 20120612 (prerelease)"
+ .section .note.GNU-stack,"",@progbits
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value-param.c
@@ -0,0 +1,40 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2012 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+volatile int vv;
+
+static __attribute__((noinline)) int
+foo (int x, int y, int z)
+{
+ int a = x * 2;
+ int b = y * 2;
+ int c = z * 2;
+ vv++; /* break-here */
+ return x + z;
+}
+
+static __attribute__((noinline)) int
+bar (int x)
+{
+ return foo (x, 2, 3) + foo (x, 4, 3) + foo (x + 6, x, 3) + x;
+}
+
+int
+main (void)
+{
+ return bar (10);
+}
--- /dev/null
+++ b/gdb/testsuite/gdb.arch/amd64-entry-value-param.exp
@@ -0,0 +1,51 @@
+# Copyright (C) 2012 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+set testfile amd64-entry-value-param
+set srcfile ${testfile}.S
+set csrcfile ${testfile}.c
+set opts {}
+
+if [info exists COMPILE] {
+ # make check RUNTESTFLAGS="gdb.arch/amd64-entry-value-param.exp COMPILE=1"
+ set srcfile ${csrcfile}
+ lappend opts debug optimize=-O2
+} elseif { ![istarget x86_64-*-* ] || ![is_lp64_target] } {
+ verbose "Skipping amd64-entry-value-param."
+ return
+}
+
+if { [prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} $opts] } {
+ return -1
+}
+
+if ![runto_main] {
+ return -1
+}
+
+set srcfile $csrcfile
+gdb_breakpoint [gdb_get_line_number "break-here"]
+
+gdb_continue_to_breakpoint "break-here" ".* break-here .*"
+gdb_test "p y" " = 2"
+gdb_test "p b" " = 4"
+
+gdb_continue_to_breakpoint "break-here" ".* break-here .*"
+gdb_test "p y" " = 4"
+gdb_test "p b" " = 8"
+
+gdb_continue_to_breakpoint "break-here" ".* break-here .*"
+gdb_test "p y" " = 10"
+gdb_test "p b" " = 20"