/* Target-dependent code for GDB, the GNU debugger.
- Copyright (C) 2001-2016 Free Software Foundation, Inc.
+ Copyright (C) 2001-2017 Free Software Foundation, Inc.
Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
for IBM Deutschland Entwicklung GmbH, IBM Corporation.
#include "elf/common.h"
#include "elf/s390.h"
#include "elf-bfd.h"
+#include <algorithm>
#include "features/s390-linux32.c"
#include "features/s390-linux32v1.c"
return 0;
}
+/* The "gen_return_address" gdbarch method. Since this is supposed to be
+ just a best-effort method, and we don't really have the means to run
+ the full unwinder here, just collect the link register. */
+
+static void
+s390_gen_return_address (struct gdbarch *gdbarch,
+ struct agent_expr *ax, struct axs_value *value,
+ CORE_ADDR scope)
+{
+ value->type = register_type (gdbarch, S390_R14_REGNUM);
+ value->kind = axs_lvalue_register;
+ value->u.reg = S390_R14_REGNUM;
+}
+
/* A helper for s390_software_single_step, decides if an instruction
is a partial-execution instruction that needs to be executed until
process about 4kiB of it each time, leading to O(n**2) memory and time
complexity. */
-static int
-s390_software_single_step (struct frame_info *frame)
+static VEC (CORE_ADDR) *
+s390_software_single_step (struct regcache *regcache)
{
- struct gdbarch *gdbarch = get_frame_arch (frame);
- struct address_space *aspace = get_frame_address_space (frame);
- CORE_ADDR loc = get_frame_pc (frame);
+ struct gdbarch *gdbarch = get_regcache_arch (regcache);
+ CORE_ADDR loc = regcache_read_pc (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int len;
uint16_t insn;
+ VEC (CORE_ADDR) *next_pcs = NULL;
/* Special handling only if recording. */
if (!record_full_is_used ())
- return 0;
+ return NULL;
/* First, match a partial instruction. */
if (!s390_is_partial_instruction (gdbarch, loc, &len))
- return 0;
+ return NULL;
loc += len;
/* Second, look for a branch back to it. */
insn = read_memory_integer (loc, 2, byte_order);
if (insn != 0xa714) /* BRC with mask 1 */
- return 0;
+ return NULL;
insn = read_memory_integer (loc + 2, 2, byte_order);
if (insn != (uint16_t) -(len / 2))
- return 0;
+ return NULL;
loc += 4;
/* Found it, step past the whole thing. */
+ VEC_safe_push (CORE_ADDR, next_pcs, loc);
- insert_single_step_breakpoint (gdbarch, aspace, loc);
-
- return 1;
+ return next_pcs;
}
static int
{
ULONGEST tdw;
enum register_status ret;
- int i;
regcache_supply_regset (regset, regcache, regnum, regs, len);
ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw);
cb (".reg-s390-last-break", 8,
(gdbarch_ptr_bit (gdbarch) == 32
? &s390_last_break_regset : &s390x_last_break_regset),
- "s930 last-break address", cb_data);
+ "s390 last-break address", cb_data);
if (tdep->have_linux_v2)
cb (".reg-s390-system-call", 4, &s390_system_call_regset,
CORE_ADDR post_prologue_pc
= skip_prologue_using_sal (gdbarch, func_addr);
if (post_prologue_pc != 0)
- return max (pc, post_prologue_pc);
+ return std::max (pc, post_prologue_pc);
}
skip_pc = s390_analyze_prologue (gdbarch, pc, (CORE_ADDR)-1, &data);
s390_frame_prev_register (struct frame_info *this_frame,
void **this_prologue_cache, int regnum)
{
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct s390_unwind_cache *info
= s390_frame_unwind_cache (this_frame, this_prologue_cache);
struct dwarf2_frame_state_reg *reg,
struct frame_info *this_frame)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
/* The condition code (and thus PSW mask) is call-clobbered. */
if (regnum == S390_PSWM_REGNUM)
reg->how = DWARF2_FRAME_REG_UNDEFINED;
/* Breakpoints. */
+constexpr gdb_byte s390_break_insn[] = { 0x0, 0x1 };
-static const gdb_byte *
-s390_breakpoint_from_pc (struct gdbarch *gdbarch,
- CORE_ADDR *pcptr, int *lenptr)
-{
- static const gdb_byte breakpoint[] = { 0x0, 0x1 };
-
- *lenptr = sizeof (breakpoint);
- return breakpoint;
-}
-
+typedef BP_MANIPULATION (s390_break_insn) s390_breakpoint;
/* Address handling. */
static int
s390_record_vr (struct gdbarch *gdbarch, struct regcache *regcache, int i)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
if (i < 16)
{
if (record_full_arch_list_add_reg (regcache, S390_F0_REGNUM + i))
s390_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
CORE_ADDR addr)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
uint16_t insn[3] = {0};
/* Instruction as bytes. */
uint8_t ibyte[6];
set_gdbarch_decr_pc_after_break (gdbarch, 2);
/* Stack grows downward. */
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_breakpoint_from_pc (gdbarch, s390_breakpoint_from_pc);
+ set_gdbarch_breakpoint_kind_from_pc (gdbarch, s390_breakpoint::kind_from_pc);
+ set_gdbarch_sw_breakpoint_from_kind (gdbarch, s390_breakpoint::bp_from_kind);
set_gdbarch_software_single_step (gdbarch, s390_software_single_step);
set_gdbarch_displaced_step_hw_singlestep (gdbarch, s390_displaced_step_hw_singlestep);
set_gdbarch_skip_prologue (gdbarch, s390_skip_prologue);
s390_ax_pseudo_register_collect);
set_gdbarch_ax_pseudo_register_push_stack
(gdbarch, s390_ax_pseudo_register_push_stack);
+ set_gdbarch_gen_return_address (gdbarch, s390_gen_return_address);
tdesc_use_registers (gdbarch, tdesc, tdesc_data);
set_gdbarch_register_name (gdbarch, s390_register_name);
projects / deliverable / binutils-gdb.git / blobdiff