From: Stafford Horne <shorne@gmail.com>
To: gdb-patches@sourceware.org
Cc: openrisc@lists.librecores.org, Franck Jullien <franck.jullien@gmail.com>
Subject: [PATCH 03/18] gdb: or1k: Add or1k_push_dummy_code and use it.
Date: Wed, 23 Nov 2016 22:11:00 -0000 [thread overview]
Message-ID: <1479939044-1341-4-git-send-email-shorne@gmail.com> (raw)
In-Reply-To: <1479939044-1341-1-git-send-email-shorne@gmail.com>
From: Franck Jullien <franck.jullien@gmail.com>
gdb/ChangeLog:
* or1k-tdep.c (or1k_push_dummy_code): New function.
(or1k_gdbarch_init): Override default behavior and call dummy
from the stack. Set the push_dummy_code handler to
or1k_push_dummy_code.
Signed-off-by: Franck Jullien <franck.jullien@gmail.com>
---
gdb/or1k-tdep.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/gdb/or1k-tdep.c b/gdb/or1k-tdep.c
index 55b9522..d660a39 100644
--- a/gdb/or1k-tdep.c
+++ b/gdb/or1k-tdep.c
@@ -1112,6 +1112,47 @@ or1k_unwind_sp (struct gdbarch *gdbarch,
} /* or1k_unwind_sp() */
+/*----------------------------------------------------------------------------*/
+/*!Provides return address for dummy call
+
+ Provides an address on the stack where to put a breakpoint as return
+ address for function. bp_addr is the address to which the function should
+ return (which is breakpointed, so gdb can regain control, hence the name).
+
+ @param[in] gdbarch The architecture to use
+ @param[in] sp The stack pointer
+ @param[in] function Pointer to the function that will be called
+ @param[in] args The arguments
+ @param[in] nargs Number of ags to push
+ @param[in] value_type Type of the function result
+ @param[in] real_pc Resume address
+ @param[in] bp_addr Breakpoint address
+ @param[in] regcache The register cache to use
+
+ @return The breakpoint address */
+/*---------------------------------------------------------------------------*/
+
+static CORE_ADDR
+or1k_push_dummy_code (struct gdbarch *gdbarch,
+ CORE_ADDR sp,
+ CORE_ADDR function,
+ struct value **args,
+ int nargs,
+ struct type *value_type,
+ CORE_ADDR *real_pc,
+ CORE_ADDR *bp_addr,
+ struct regcache *regcache)
+{
+ /* Allocate space sufficient for a breakpoint, keeping the stack aligned. */
+ sp = (sp - 4) & ~15;
+ /* Store the address of that breakpoint */
+ *bp_addr = sp;
+ /* The call starts at the callee's entry point. */
+ *real_pc = function;
+
+ return sp;
+
+} /* or1k_push_dummy_code() */
/*----------------------------------------------------------------------------*/
/*!Create a dummy stack frame
@@ -1888,6 +1929,8 @@ or1k_gdbarch_init (struct gdbarch_info info,
set_gdbarch_unwind_sp (gdbarch, or1k_unwind_sp);
/* Functions handling dummy frames */
+ set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
+ set_gdbarch_push_dummy_code (gdbarch, or1k_push_dummy_code);
set_gdbarch_push_dummy_call (gdbarch, or1k_push_dummy_call);
set_gdbarch_dummy_id (gdbarch, or1k_dummy_id);
--
2.7.4
next prev parent reply other threads:[~2016-11-23 22:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-23 22:11 [PATCH 00/18] gdb: Port for OpenRISC Stafford Horne
2016-11-23 22:11 ` [PATCH 16/18] gdb: Remove corelow object from or1k linux build Stafford Horne
2016-11-23 22:11 ` [PATCH 15/18] gdb: or1k: Update calling conventions to help pass tests Stafford Horne
2016-11-23 22:11 ` [PATCH 05/18] gdb: handle arbitrary strings in tdesc_register_in_reggroup_p Stafford Horne
2016-11-23 22:11 ` Stafford Horne [this message]
2016-11-23 22:11 ` [PATCH 09/18] gdb: or1k: Silence gcc warning Stafford Horne
2016-11-23 22:11 ` [PATCH 17/18] gdb: or1k: Updates for compiler type checking Stafford Horne
2016-11-23 22:11 ` [PATCH 04/18] gdb: add tdesc_find_register functions Stafford Horne
2016-11-23 22:11 ` [PATCH 13/18] gdb: Add OpenRISC to texinfo menu Stafford Horne
2016-11-23 22:13 ` [PATCH 08/18] gdb: or1k: change or1k_push_dummy_code stack alignment Stafford Horne
2016-11-23 22:13 ` [PATCH 10/18] gdb: or1k: Fixes for things that broke after upstream merge Stafford Horne
2016-11-23 22:13 ` [PATCH 01/18] gdb: add or1k and or1knd target support Stafford Horne
2016-11-23 22:13 ` [PATCH 12/18] gdb: or1k: Apply changes of the last two years Stafford Horne
2016-11-23 22:14 ` [PATCH 06/18] gdb: or1k: set gdbarch num regs to gpr + spr regs Stafford Horne
2016-11-23 22:14 ` [PATCH 14/18] gdb: testsuite: Add or1k l.nop inscruction Stafford Horne
2016-11-23 22:14 ` [PATCH 07/18] gdb: or1k: add target descriptor support Stafford Horne
2016-11-23 22:16 ` [PATCH 02/18] gdb: or1k: Add a check for NULL ptr in or1k_skip_prologue Stafford Horne
2016-11-23 22:16 ` [PATCH 11/18] Add gdb for or1k build Stafford Horne
2016-11-23 22:23 ` [PATCH 18/18] gdb: or1k: Refactor to new bp_kind_from_pc and pb_from_kind Stafford Horne
2016-11-24 20:37 ` [PATCH 00/18] gdb: Port for OpenRISC Yao Qi
2016-11-25 22:50 ` Stafford Horne
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