mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-11-27 14:00:30 +00:00
gdb
* frame.h (frame_unwinder_is): Declare. * frame.c (frame_unwinder_is): New function. * dwarf2loc.c: Include dwarf2-frame.h. (dwarf_expr_frame_cfa): New function. (dwarf2_evaluate_loc_desc): Use it. (needs_frame_frame_cfa): New function. (dwarf2_loc_desc_needs_frame): Use it. * dwarf2expr.h (struct dwarf_expr_context) <get_frame_cfa>: New field. * dwarf2expr.c (execute_stack_op) <DW_OP_call_frame_cfa>: New case. * dwarf2-frame.h (dwarf2_frame_cfa): Declare. * dwarf2-frame.c (no_get_frame_cfa): New function. (execute_stack_op): Use it. (dwarf2_frame_cfa): New function. gdb/testsuite * gdb.dwarf2/callframecfa.exp: New file. * gdb.dwarf2/callframecfa.S: New file.
This commit is contained in:
Tom Tromey
parent
d34089166b
commit
e78022079c
@ -1,3 +1,21 @@
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2009-09-02 Tom Tromey <tromey@redhat.com>
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* frame.h (frame_unwinder_is): Declare.
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* frame.c (frame_unwinder_is): New function.
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* dwarf2loc.c: Include dwarf2-frame.h.
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(dwarf_expr_frame_cfa): New function.
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(dwarf2_evaluate_loc_desc): Use it.
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(needs_frame_frame_cfa): New function.
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(dwarf2_loc_desc_needs_frame): Use it.
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* dwarf2expr.h (struct dwarf_expr_context) <get_frame_cfa>: New
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field.
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* dwarf2expr.c (execute_stack_op) <DW_OP_call_frame_cfa>: New
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case.
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* dwarf2-frame.h (dwarf2_frame_cfa): Declare.
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* dwarf2-frame.c (no_get_frame_cfa): New function.
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(execute_stack_op): Use it.
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(dwarf2_frame_cfa): New function.
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2009-09-02 Hui Zhu <teawater@gmail.com>
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* record.c (record_resume): Change "signal" to "siggnal".
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@ -309,6 +309,15 @@ no_get_frame_base (void *baton, gdb_byte **start, size_t *length)
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_("Support for DW_OP_fbreg is unimplemented"));
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}
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/* Helper function for execute_stack_op. */
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static CORE_ADDR
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no_get_frame_cfa (void *baton)
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{
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internal_error (__FILE__, __LINE__,
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_("Support for DW_OP_call_frame_cfa is unimplemented"));
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}
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static CORE_ADDR
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no_get_tls_address (void *baton, CORE_ADDR offset)
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{
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@ -363,6 +372,7 @@ execute_stack_op (gdb_byte *exp, ULONGEST len, int addr_size,
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ctx->read_reg = read_reg;
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ctx->read_mem = read_mem;
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ctx->get_frame_base = no_get_frame_base;
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ctx->get_frame_cfa = no_get_frame_cfa;
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ctx->get_tls_address = no_get_tls_address;
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dwarf_expr_push (ctx, initial);
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@ -1250,6 +1260,23 @@ dwarf2_frame_base_sniffer (struct frame_info *this_frame)
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return NULL;
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}
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/* Compute the CFA for THIS_FRAME, but only if THIS_FRAME came from
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the DWARF unwinder. This is used to implement
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DW_OP_call_frame_cfa. */
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CORE_ADDR
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dwarf2_frame_cfa (struct frame_info *this_frame)
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{
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while (get_frame_type (this_frame) == INLINE_FRAME)
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this_frame = get_prev_frame (this_frame);
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/* This restriction could be lifted if other unwinders are known to
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compute the frame base in a way compatible with the DWARF
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unwinder. */
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if (! frame_unwinder_is (this_frame, &dwarf2_frame_unwind))
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error (_("can't compute CFA for this frame"));
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return get_frame_base (this_frame);
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}
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const struct objfile_data *dwarf2_frame_objfile_data;
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@ -118,4 +118,8 @@ extern const struct frame_base *
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void dwarf2_frame_build_info (struct objfile *objfile);
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/* Compute the DWARF CFA for a frame. */
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CORE_ADDR dwarf2_frame_cfa (struct frame_info *this_frame);
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#endif /* dwarf2-frame.h */
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@ -716,6 +716,10 @@ execute_stack_op (struct dwarf_expr_context *ctx,
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}
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break;
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case DW_OP_call_frame_cfa:
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result = (ctx->get_frame_cfa) (ctx->baton);
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break;
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case DW_OP_GNU_push_tls_address:
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/* Variable is at a constant offset in the thread-local
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storage block into the objfile for the current thread and
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@ -55,6 +55,9 @@ struct dwarf_expr_context
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expression evaluation is complete. */
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void (*get_frame_base) (void *baton, gdb_byte **start, size_t *length);
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/* Return the CFA for the frame. */
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CORE_ADDR (*get_frame_cfa) (void *baton);
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/* Return the thread-local storage address for
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DW_OP_GNU_push_tls_address. */
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CORE_ADDR (*get_tls_address) (void *baton, CORE_ADDR offset);
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@ -36,6 +36,7 @@
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#include "dwarf2.h"
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#include "dwarf2expr.h"
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#include "dwarf2loc.h"
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#include "dwarf2-frame.h"
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#include "gdb_string.h"
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#include "gdb_assert.h"
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@ -194,6 +195,16 @@ dwarf_expr_frame_base (void *baton, gdb_byte **start, size_t * length)
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SYMBOL_NATURAL_NAME (framefunc));
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}
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/* Helper function for dwarf2_evaluate_loc_desc. Computes the CFA for
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the frame in BATON. */
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static CORE_ADDR
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dwarf_expr_frame_cfa (void *baton)
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{
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struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
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return dwarf2_frame_cfa (debaton->frame);
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}
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/* Using the objfile specified in BATON, find the address for the
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current thread's thread-local storage with offset OFFSET. */
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static CORE_ADDR
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@ -237,6 +248,7 @@ dwarf2_evaluate_loc_desc (struct symbol *var, struct frame_info *frame,
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ctx->read_reg = dwarf_expr_read_reg;
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ctx->read_mem = dwarf_expr_read_mem;
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ctx->get_frame_base = dwarf_expr_frame_base;
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ctx->get_frame_cfa = dwarf_expr_frame_cfa;
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ctx->get_tls_address = dwarf_expr_tls_address;
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dwarf_expr_eval (ctx, data, size);
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@ -331,6 +343,16 @@ needs_frame_frame_base (void *baton, gdb_byte **start, size_t * length)
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nf_baton->needs_frame = 1;
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}
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/* CFA accesses require a frame. */
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static CORE_ADDR
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needs_frame_frame_cfa (void *baton)
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{
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struct needs_frame_baton *nf_baton = baton;
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nf_baton->needs_frame = 1;
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return 1;
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}
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/* Thread-local accesses do require a frame. */
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static CORE_ADDR
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needs_frame_tls_address (void *baton, CORE_ADDR offset)
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@ -363,6 +385,7 @@ dwarf2_loc_desc_needs_frame (gdb_byte *data, unsigned short size,
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ctx->read_reg = needs_frame_read_reg;
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ctx->read_mem = needs_frame_read_mem;
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ctx->get_frame_base = needs_frame_frame_base;
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ctx->get_frame_cfa = needs_frame_frame_cfa;
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ctx->get_tls_address = needs_frame_tls_address;
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dwarf_expr_eval (ctx, data, size);
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11
gdb/frame.c
11
gdb/frame.c
@ -1843,6 +1843,17 @@ get_frame_args_address (struct frame_info *fi)
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return fi->base->this_args (fi, &fi->base_cache);
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}
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/* Return true if the frame unwinder for frame FI is UNWINDER; false
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otherwise. */
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int
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frame_unwinder_is (struct frame_info *fi, const struct frame_unwind *unwinder)
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{
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if (fi->unwind == NULL)
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fi->unwind = frame_unwind_find_by_frame (fi, &fi->prologue_cache);
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return fi->unwind == unwinder;
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}
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/* Level of the selected frame: 0 for innermost, 1 for its caller, ...
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or -1 for a NULL frame. */
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@ -696,4 +696,10 @@ extern struct frame_info *deprecated_safe_get_selected_frame (void);
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extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
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/* Return true if the frame unwinder for frame FI is UNWINDER; false
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otherwise. */
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extern int frame_unwinder_is (struct frame_info *fi,
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const struct frame_unwind *unwinder);
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#endif /* !defined (FRAME_H) */
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@ -1,3 +1,8 @@
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2009-09-02 Tom Tromey <tromey@redhat.com>
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* gdb.dwarf2/callframecfa.exp: New file.
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* gdb.dwarf2/callframecfa.S: New file.
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2009-09-01 Jan Kratochvil <jan.kratochvil@redhat.com>
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* gdb.base/solib-overlap.exp, gdb.base/solib-overlap-lib.c,
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309
gdb/testsuite/gdb.dwarf2/callframecfa.S
Normal file
309
gdb/testsuite/gdb.dwarf2/callframecfa.S
Normal file
@ -0,0 +1,309 @@
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/*
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Copyright 2009 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* This was compiled from a trivial program just to test the
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DW_OP_call_frame_cfa operator:
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int func (int arg) {
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return arg + 23;
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}
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int main(int argc, char *argv[]) {
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func (77);
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}
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*/
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.file "q.c"
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.section .debug_abbrev,"",@progbits
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.Ldebug_abbrev0:
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.section .debug_info,"",@progbits
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.Ldebug_info0:
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.section .debug_line,"",@progbits
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.Ldebug_line0:
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.text
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.Ltext0:
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.globl func
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.type func, @function
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func:
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.LFB0:
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.file 1 "q.c"
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.loc 1 2 0
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.cfi_startproc
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pushl %ebp
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.cfi_def_cfa_offset 8
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movl %esp, %ebp
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.cfi_offset 5, -8
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.cfi_def_cfa_register 5
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.loc 1 3 0
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movl 8(%ebp), %eax
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addl $23, %eax
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.loc 1 4 0
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popl %ebp
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.cfi_restore 5
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.cfi_def_cfa 4, 4
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ret
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.cfi_endproc
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.LFE0:
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.size func, .-func
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.globl _start
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.type _start, @function
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_start:
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.LFB1:
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.loc 1 6 0
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.cfi_startproc
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pushl %ebp
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.cfi_def_cfa_offset 8
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movl %esp, %ebp
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.cfi_offset 5, -8
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.cfi_def_cfa_register 5
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subl $4, %esp
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.loc 1 7 0
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movl $77, (%esp)
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call func
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.loc 1 8 0
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leave
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.cfi_restore 5
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.cfi_def_cfa 4, 4
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ret
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.cfi_endproc
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.LFE1:
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.size _start, .-_start
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.Letext0:
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.section .debug_info
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.long 0x9e
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.value 0x3
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.long .Ldebug_abbrev0
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.byte 0x4
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.uleb128 0x1
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.long .LASF5
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.byte 0x1
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.string "q.c"
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.long .LASF6
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.long .Ltext0
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.long .Letext0
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.long .Ldebug_line0
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.uleb128 0x2
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.byte 0x1
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.long .LASF0
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.byte 0x1
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.byte 0x1
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.byte 0x1
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.long 0x4f
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.long .LFB0
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.long .LFE0
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.byte 0x1
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.byte 0x9c
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.long 0x4f
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.uleb128 0x3
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.string "arg"
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.byte 0x1
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.byte 0x1
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.long 0x4f
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.byte 0x2
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.byte 0x91
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.sleb128 0
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.byte 0x0
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.uleb128 0x4
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.byte 0x4
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.byte 0x5
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.string "int"
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.uleb128 0x2
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.byte 0x1
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.long .LASF1
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.byte 0x1
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.byte 0x6
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.byte 0x1
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.long 0x4f
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.long .LFB1
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.long .LFE1
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.byte 0x1
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.byte 0x9c
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.long 0x8e
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.uleb128 0x5
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.long .LASF2
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.byte 0x1
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.byte 0x6
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.long 0x4f
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.byte 0x2
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.byte 0x91
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.sleb128 0
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.uleb128 0x5
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.long .LASF3
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.byte 0x1
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.byte 0x6
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.long 0x8e
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.byte 0x2
|
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.byte 0x91
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.sleb128 4
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.byte 0x0
|
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.uleb128 0x6
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||||
.byte 0x4
|
||||
.long 0x94
|
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.uleb128 0x6
|
||||
.byte 0x4
|
||||
.long 0x9a
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.uleb128 0x7
|
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.byte 0x1
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.byte 0x6
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.long .LASF4
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.byte 0x0
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.section .debug_abbrev
|
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.uleb128 0x1
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.uleb128 0x11
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.byte 0x1
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.uleb128 0x25
|
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.uleb128 0xe
|
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.uleb128 0x13
|
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.uleb128 0xb
|
||||
.uleb128 0x3
|
||||
.uleb128 0x8
|
||||
.uleb128 0x1b
|
||||
.uleb128 0xe
|
||||
.uleb128 0x11
|
||||
.uleb128 0x1
|
||||
.uleb128 0x12
|
||||
.uleb128 0x1
|
||||
.uleb128 0x10
|
||||
.uleb128 0x6
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.uleb128 0x2
|
||||
.uleb128 0x2e
|
||||
.byte 0x1
|
||||
.uleb128 0x3f
|
||||
.uleb128 0xc
|
||||
.uleb128 0x3
|
||||
.uleb128 0xe
|
||||
.uleb128 0x3a
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3b
|
||||
.uleb128 0xb
|
||||
.uleb128 0x27
|
||||
.uleb128 0xc
|
||||
.uleb128 0x49
|
||||
.uleb128 0x13
|
||||
.uleb128 0x11
|
||||
.uleb128 0x1
|
||||
.uleb128 0x12
|
||||
.uleb128 0x1
|
||||
.uleb128 0x40
|
||||
.uleb128 0xa
|
||||
.uleb128 0x1
|
||||
.uleb128 0x13
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.uleb128 0x3
|
||||
.uleb128 0x5
|
||||
.byte 0x0
|
||||
.uleb128 0x3
|
||||
.uleb128 0x8
|
||||
.uleb128 0x3a
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3b
|
||||
.uleb128 0xb
|
||||
.uleb128 0x49
|
||||
.uleb128 0x13
|
||||
.uleb128 0x2
|
||||
.uleb128 0xa
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.uleb128 0x4
|
||||
.uleb128 0x24
|
||||
.byte 0x0
|
||||
.uleb128 0xb
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3e
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3
|
||||
.uleb128 0x8
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.uleb128 0x5
|
||||
.uleb128 0x5
|
||||
.byte 0x0
|
||||
.uleb128 0x3
|
||||
.uleb128 0xe
|
||||
.uleb128 0x3a
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3b
|
||||
.uleb128 0xb
|
||||
.uleb128 0x49
|
||||
.uleb128 0x13
|
||||
.uleb128 0x2
|
||||
.uleb128 0xa
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.uleb128 0x6
|
||||
.uleb128 0xf
|
||||
.byte 0x0
|
||||
.uleb128 0xb
|
||||
.uleb128 0xb
|
||||
.uleb128 0x49
|
||||
.uleb128 0x13
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.uleb128 0x7
|
||||
.uleb128 0x24
|
||||
.byte 0x0
|
||||
.uleb128 0xb
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3e
|
||||
.uleb128 0xb
|
||||
.uleb128 0x3
|
||||
.uleb128 0xe
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.byte 0x0
|
||||
.section .debug_pubnames,"",@progbits
|
||||
.long 0x20
|
||||
.value 0x2
|
||||
.long .Ldebug_info0
|
||||
.long 0xa2
|
||||
.long 0x25
|
||||
.string "func"
|
||||
.long 0x56
|
||||
.string "main"
|
||||
.long 0x0
|
||||
.section .debug_aranges,"",@progbits
|
||||
.long 0x1c
|
||||
.value 0x2
|
||||
.long .Ldebug_info0
|
||||
.byte 0x4
|
||||
.byte 0x0
|
||||
.value 0x0
|
||||
.value 0x0
|
||||
.long .Ltext0
|
||||
.long .Letext0-.Ltext0
|
||||
.long 0x0
|
||||
.long 0x0
|
||||
.section .debug_str,"MS",@progbits,1
|
||||
.LASF5:
|
||||
.string "GNU C 4.5.0 20090810 (experimental) [trunk revision 150633]"
|
||||
.LASF2:
|
||||
.string "argc"
|
||||
.LASF6:
|
||||
.string "/tmp"
|
||||
.LASF0:
|
||||
.string "func"
|
||||
.LASF3:
|
||||
.string "argv"
|
||||
.LASF1:
|
||||
.string "main"
|
||||
.LASF4:
|
||||
.string "char"
|
||||
.ident "GCC: (GNU) 4.5.0 20090810 (experimental) [trunk revision 150633]"
|
||||
.section .note.GNU-stack,"",@progbits
|
||||
55
gdb/testsuite/gdb.dwarf2/callframecfa.exp
Normal file
55
gdb/testsuite/gdb.dwarf2/callframecfa.exp
Normal file
@ -0,0 +1,55 @@
|
||||
# Copyright 2009 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/>.
|
||||
|
||||
# Test DW_OP_call_frame_cfa.
|
||||
|
||||
# This test can only be run on targets which support DWARF-2 and use gas.
|
||||
# For now pick a sampling of likely targets.
|
||||
if {![istarget *-*-linux*]
|
||||
&& ![istarget *-*-gnu*]
|
||||
&& ![istarget *-*-elf*]
|
||||
&& ![istarget *-*-openbsd*]
|
||||
&& ![istarget arm-*-eabi*]
|
||||
&& ![istarget powerpc-*-eabi*]} {
|
||||
return 0
|
||||
}
|
||||
# This test can only be run on x86 targets.
|
||||
if {![istarget i?86-*]} {
|
||||
return 0
|
||||
}
|
||||
|
||||
set testfile "callframecfa"
|
||||
set srcfile ${testfile}.S
|
||||
set binfile ${objdir}/${subdir}/${testfile}.x
|
||||
|
||||
if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable \
|
||||
[list {additional_flags=-nostdlib}]] != "" } {
|
||||
return -1
|
||||
}
|
||||
|
||||
gdb_exit
|
||||
gdb_start
|
||||
gdb_reinitialize_dir $srcdir/$subdir
|
||||
gdb_load ${binfile}
|
||||
|
||||
gdb_test "break *func" "Breakpoint 1.*" "set breakpoint for call-frame-cfa"
|
||||
gdb_test "run" "" "run for call-frame-cfa"
|
||||
gdb_test "display arg" "arg = 77" "set display for call-frame-cfa"
|
||||
|
||||
# We know how many instructions are in the function. Note that we
|
||||
# can't handle the "ret" instruction due to the epilogue unwinder.
|
||||
for {set i 1} {$i < 5} {incr i} {
|
||||
gdb_test "si" "arg = 77" "step $i for call-frame-cfa"
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user