FreeChainXenon/binutils-gdb
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

* sparc-tdep.h (struct gdbarch_tdep): Add step_trap member.

Browse source 
(sparc_address_from_register): New prototype.
(sparcnbsd_step_trap): New prototype.
* sparc-tdep.c (sparc_address_from_register): Make globally
visible.
(sparc_analyze_control_transfer): Change prototype to accept
`struct gdbarch *' as first argument.  Allow for optional hnadling
for trap instructions.
(sparc_step_trap): New function.
(sparc_software_single_step): Adjust call to
sparc_analyze_control_trabsfer.
(sparc32_gdbarch_init): Initialize TDEP->step_trap.
* sparcnbsd-tdep.c (sparcnbsd_step_trap): New function.
(sparc32nbsd_init_abi): Set TDEP->step_trap.
* sparc64obsd-tdep.c (sparc64obsd_init_abi): Set TDEP->step_trap.
* sparc64nbsd-tdep.c (sparc64nbsd_init_abi): Set TDEP->step_trap.
This commit is contained in:
Mark Kettenis 2006-01-22 20:07:38 +00:00
parent 0a8f48b9a8
commit c893be758b
6 changed files with 87 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

34
gdb/sparcnbsd-tdep.c
View file

@ -1,6 +1,6 @@
/* Target-dependent code for NetBSD/sparc.
Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
@ -38,6 +38,11 @@
#include "sparc-tdep.h"
#include "nbsd-tdep.h"
/* Macros to extract fields from SPARC instructions. */
#define X_RS1(i) (((i) >> 14) & 0x1f)
#define X_RS2(i) ((i) & 0x1f)
#define X_I(i) (((i) >> 13) & 1)
const struct sparc_gregset sparc32nbsd_gregset =
{
0 * 4, /* %psr */
@ -256,6 +261,30 @@ sparc32nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
return NULL;
}
/* Return the address of a system call's alternative return
address. */
CORE_ADDR
sparcnbsd_step_trap (unsigned long insn)
{
if ((X_I (insn) == 0 && X_RS1 (insn) == 0 && X_RS2 (insn) == 0)
|| (X_I (insn) == 1 && X_RS1 (insn) == 0 && (insn & 0x7f) == 0))
{
/* "New" system call. */
ULONGEST number;
regcache_cooked_read_unsigned (current_regcache,
SPARC_G1_REGNUM, &number);
if (number & 0x400)
return sparc_address_from_register (SPARC_G2_REGNUM);
if (number & 0x800)
return sparc_address_from_register (SPARC_G7_REGNUM);
}
return 0;
}
static void
sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
@ -272,6 +301,9 @@ sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
tdep->fpregset = regset_alloc (gdbarch, sparc32nbsd_supply_fpregset, NULL);
tdep->sizeof_fpregset = 33 * 4;
/* Make sure we can single-step "new" syscalls. */
tdep->step_trap = sparcnbsd_step_trap;
frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer);
}