#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 default_register_reggroup_p (gdbarch, regnum, group);
}
+/* The "ax_pseudo_register_collect" gdbarch method. */
+
+static int
+s390_ax_pseudo_register_collect (struct gdbarch *gdbarch,
+ struct agent_expr *ax, int regnum)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ if (regnum == tdep->pc_regnum)
+ {
+ ax_reg_mask (ax, S390_PSWA_REGNUM);
+ }
+ else if (regnum == tdep->cc_regnum)
+ {
+ ax_reg_mask (ax, S390_PSWM_REGNUM);
+ }
+ else if (regnum_is_gpr_full (tdep, regnum))
+ {
+ regnum -= tdep->gpr_full_regnum;
+ ax_reg_mask (ax, S390_R0_REGNUM + regnum);
+ ax_reg_mask (ax, S390_R0_UPPER_REGNUM + regnum);
+ }
+ else if (regnum_is_vxr_full (tdep, regnum))
+ {
+ regnum -= tdep->v0_full_regnum;
+ ax_reg_mask (ax, S390_F0_REGNUM + regnum);
+ ax_reg_mask (ax, S390_V0_LOWER_REGNUM + regnum);
+ }
+ else
+ {
+ internal_error (__FILE__, __LINE__, _("invalid regnum"));
+ }
+ return 0;
+}
+
+/* The "ax_pseudo_register_push_stack" gdbarch method. */
+
+static int
+s390_ax_pseudo_register_push_stack (struct gdbarch *gdbarch,
+ struct agent_expr *ax, int regnum)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ if (regnum == tdep->pc_regnum)
+ {
+ ax_reg (ax, S390_PSWA_REGNUM);
+ if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
+ {
+ ax_zero_ext (ax, 31);
+ }
+ }
+ else if (regnum == tdep->cc_regnum)
+ {
+ ax_reg (ax, S390_PSWM_REGNUM);
+ if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
+ ax_const_l (ax, 12);
+ else
+ ax_const_l (ax, 44);
+ ax_simple (ax, aop_rsh_unsigned);
+ ax_zero_ext (ax, 2);
+ }
+ else if (regnum_is_gpr_full (tdep, regnum))
+ {
+ regnum -= tdep->gpr_full_regnum;
+ ax_reg (ax, S390_R0_REGNUM + regnum);
+ ax_reg (ax, S390_R0_UPPER_REGNUM + regnum);
+ ax_const_l (ax, 32);
+ ax_simple (ax, aop_lsh);
+ ax_simple (ax, aop_bit_or);
+ }
+ else if (regnum_is_vxr_full (tdep, regnum))
+ {
+ /* Too large to stuff on the stack. */
+ return 1;
+ }
+ else
+ {
+ internal_error (__FILE__, __LINE__, _("invalid regnum"));
+ }
+ 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
+static VEC (CORE_ADDR) *
s390_software_single_step (struct frame_info *frame)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
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,
break;
}
+ /* BRC/BRCL -- branch relative on condition. Ignore "branch
+ never", branch to following instruction, and "conditional
+ trap" (BRC +2). Otherwise terminate search. */
+ else if (is_ri (insn, op1_brc, op2_brc, &r1, &i2))
+ {
+ if (r1 != 0 && i2 != 1 && i2 != 2)
+ break;
+ }
+ else if (is_ril (insn, op1_brcl, op2_brcl, &r1, &i2))
+ {
+ if (r1 != 0 && i2 != 3)
+ break;
+ }
+
/* Terminate search when hitting any other branch instruction. */
else if (is_rr (insn, op_basr, &r1, &r2)
|| is_rx (insn, op_bas, &r1, &d2, &x2, &b2)
|| is_rr (insn, op_bcr, &r1, &r2)
|| is_rx (insn, op_bc, &r1, &d2, &x2, &b2)
- || is_ri (insn, op1_brc, op2_brc, &r1, &i2)
- || is_ril (insn, op1_brcl, op2_brcl, &r1, &i2)
|| is_ril (insn, op1_brasl, op2_brasl, &r2, &i2))
break;
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);
bother searching for it -- with modern compilers this would be mostly
pointless anyway. Trust that we'll either have valid DWARF-2 CFI data
or else a valid backchain ... */
- func = get_frame_func (this_frame);
- if (!func)
- return 0;
+ if (!get_frame_func_if_available (this_frame, &info->func))
+ {
+ info->func = -1;
+ return 0;
+ }
+ func = info->func;
/* Try to analyze the prologue. */
result = s390_analyze_prologue (gdbarch, func,
info->local_base = prev_sp - size;
}
- info->func = func;
return 1;
}
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR backchain;
ULONGEST reg;
- LONGEST sp;
+ LONGEST sp, tmp;
int i;
/* Set up ABI call-saved/call-clobbered registers. */
/* Get the backchain. */
reg = get_frame_register_unsigned (this_frame, S390_SP_REGNUM);
- backchain = read_memory_unsigned_integer (reg, word_size, byte_order);
+ if (!safe_read_memory_integer (reg, word_size, byte_order, &tmp))
+ tmp = 0;
+ backchain = (CORE_ADDR) tmp;
/* A zero backchain terminates the frame chain. As additional
sanity check, let's verify that the spill slot for SP in the
= s390_frame_unwind_cache (this_frame, this_prologue_cache);
if (info->frame_base == -1)
- return;
+ {
+ if (info->func != -1)
+ *this_id = frame_id_build_unavailable_stack (info->func);
+ return;
+ }
*this_id = frame_id_build (info->frame_base, info->func);
}
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);
set_tdesc_pseudo_register_type (gdbarch, s390_pseudo_register_type);
set_tdesc_pseudo_register_reggroup_p (gdbarch,
s390_pseudo_register_reggroup_p);
+ set_gdbarch_ax_pseudo_register_collect (gdbarch,
+ 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