#include "trad-frame.h"
#include "frame-base.h"
#include "frame-unwind.h"
+#include "dwarf2-frame.h"
#include "reggroups.h"
#include "regset.h"
#include "value.h"
static int s390_instrlen[] = { 2, 4, 4, 6 };
int instrlen;
- if (read_memory_nobpt (at, &instr[0], 2))
+ if (deprecated_read_memory_nobpt (at, &instr[0], 2))
return -1;
instrlen = s390_instrlen[instr[0] >> 6];
if (instrlen > 2)
{
- if (read_memory_nobpt (at + 2, &instr[2], instrlen - 2))
+ if (deprecated_read_memory_nobpt (at + 2, &instr[2], instrlen - 2))
return -1;
}
return instrlen;
int d2;
if (word_size == 4
- && !read_memory_nobpt (pc - 4, insn, 4)
+ && !deprecated_read_memory_nobpt (pc - 4, insn, 4)
&& is_rs (insn, op_lm, &r1, &r3, &d2, &b2)
&& r3 == S390_SP_REGNUM - S390_R0_REGNUM)
return 1;
if (word_size == 4
- && !read_memory_nobpt (pc - 6, insn, 6)
+ && !deprecated_read_memory_nobpt (pc - 6, insn, 6)
&& is_rsy (insn, op1_lmy, op2_lmy, &r1, &r3, &d2, &b2)
&& r3 == S390_SP_REGNUM - S390_R0_REGNUM)
return 1;
if (word_size == 8
- && !read_memory_nobpt (pc - 6, insn, 6)
+ && !deprecated_read_memory_nobpt (pc - 6, insn, 6)
&& is_rsy (insn, op1_lmg, op2_lmg, &r1, &r3, &d2, &b2)
&& r3 == S390_SP_REGNUM - S390_R0_REGNUM)
return 1;
/* If the next frame is a NORMAL_FRAME, this frame *cannot* have frame
size zero. This is only possible if the next frame is a sentinel
frame, a dummy frame, or a signal trampoline frame. */
- if (get_frame_type (next_frame) == NORMAL_FRAME
- /* For some reason, sentinel frames are NORMAL_FRAMEs
- -- but they have negative frame level. */
- && frame_relative_level (next_frame) >= 0)
+ /* FIXME: cagney/2004-05-01: This sanity check shouldn't be
+ needed, instead the code should simpliy rely on its
+ analysis. */
+ if (get_frame_type (next_frame) == NORMAL_FRAME)
return 0;
/* If we really have a frameless function, %r14 must be valid
treat it as frameless if we're currently within the function epilog
code at a point where the frame pointer has already been restored.
This can only happen in an innermost frame. */
- if (size > 0
- && (get_frame_type (next_frame) != NORMAL_FRAME
- || frame_relative_level (next_frame) < 0))
+ /* FIXME: cagney/2004-05-01: This sanity check shouldn't be needed,
+ instead the code should simpliy rely on its analysis. */
+ if (size > 0 && get_frame_type (next_frame) != NORMAL_FRAME)
{
/* See the comment in s390_in_function_epilogue_p on why this is
not completely reliable ... */
{
struct s390_unwind_cache *info
= s390_frame_unwind_cache (next_frame, this_prologue_cache);
- trad_frame_prev_register (next_frame, info->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, bufferp);
+ trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
}
static const struct frame_unwind s390_frame_unwind = {
}
-/* PLT stub stack frames. */
-
-struct s390_pltstub_unwind_cache {
+/* Code stubs and their stack frames. For things like PLTs and NULL
+ function calls (where there is no true frame and the return address
+ is in the RETADDR register). */
+struct s390_stub_unwind_cache
+{
CORE_ADDR frame_base;
struct trad_frame_saved_reg *saved_regs;
};
-static struct s390_pltstub_unwind_cache *
-s390_pltstub_frame_unwind_cache (struct frame_info *next_frame,
- void **this_prologue_cache)
+static struct s390_stub_unwind_cache *
+s390_stub_frame_unwind_cache (struct frame_info *next_frame,
+ void **this_prologue_cache)
{
struct gdbarch *gdbarch = get_frame_arch (next_frame);
int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- struct s390_pltstub_unwind_cache *info;
+ struct s390_stub_unwind_cache *info;
ULONGEST reg;
if (*this_prologue_cache)
return *this_prologue_cache;
- info = FRAME_OBSTACK_ZALLOC (struct s390_pltstub_unwind_cache);
+ info = FRAME_OBSTACK_ZALLOC (struct s390_stub_unwind_cache);
*this_prologue_cache = info;
info->saved_regs = trad_frame_alloc_saved_regs (next_frame);
}
static void
-s390_pltstub_frame_this_id (struct frame_info *next_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
+s390_stub_frame_this_id (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ struct frame_id *this_id)
{
- struct s390_pltstub_unwind_cache *info
- = s390_pltstub_frame_unwind_cache (next_frame, this_prologue_cache);
+ struct s390_stub_unwind_cache *info
+ = s390_stub_frame_unwind_cache (next_frame, this_prologue_cache);
*this_id = frame_id_build (info->frame_base, frame_pc_unwind (next_frame));
}
static void
-s390_pltstub_frame_prev_register (struct frame_info *next_frame,
- void **this_prologue_cache,
- int regnum, int *optimizedp,
- enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *bufferp)
+s390_stub_frame_prev_register (struct frame_info *next_frame,
+ void **this_prologue_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp, CORE_ADDR *addrp,
+ int *realnump, void *bufferp)
{
- struct s390_pltstub_unwind_cache *info
- = s390_pltstub_frame_unwind_cache (next_frame, this_prologue_cache);
- trad_frame_prev_register (next_frame, info->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, bufferp);
+ struct s390_stub_unwind_cache *info
+ = s390_stub_frame_unwind_cache (next_frame, this_prologue_cache);
+ trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
}
-static const struct frame_unwind s390_pltstub_frame_unwind = {
+static const struct frame_unwind s390_stub_frame_unwind = {
NORMAL_FRAME,
- s390_pltstub_frame_this_id,
- s390_pltstub_frame_prev_register
+ s390_stub_frame_this_id,
+ s390_stub_frame_prev_register
};
static const struct frame_unwind *
-s390_pltstub_frame_sniffer (struct frame_info *next_frame)
+s390_stub_frame_sniffer (struct frame_info *next_frame)
{
- if (!in_plt_section (frame_pc_unwind (next_frame), NULL))
- return NULL;
-
- return &s390_pltstub_frame_unwind;
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ bfd_byte insn[S390_MAX_INSTR_SIZE];
+
+ /* If the current PC points to non-readable memory, we assume we
+ have trapped due to an invalid function pointer call. We handle
+ the non-existing current function like a PLT stub. */
+ if (in_plt_section (pc, NULL)
+ || s390_readinstruction (insn, pc) < 0)
+ return &s390_stub_frame_unwind;
+ return NULL;
}
ucontext (contains sigregs at offset 5 words) */
if (next_ra == next_cfa)
{
- sigreg_ptr = next_cfa + 8 + 128 + 5*word_size;
+ sigreg_ptr = next_cfa + 8 + 128 + align_up (5*word_size, 8);
}
/* Old-style RT frame and all non-RT frames:
{
struct s390_sigtramp_unwind_cache *info
= s390_sigtramp_frame_unwind_cache (next_frame, this_prologue_cache);
- trad_frame_prev_register (next_frame, info->saved_regs, regnum,
- optimizedp, lvalp, addrp, realnump, bufferp);
+ trad_frame_get_prev_register (next_frame, info->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, bufferp);
}
static const struct frame_unwind s390_sigtramp_frame_unwind = {
CORE_ADDR pc = frame_pc_unwind (next_frame);
bfd_byte sigreturn[2];
- if (read_memory_nobpt (pc, sigreturn, 2))
+ if (deprecated_read_memory_nobpt (pc, sigreturn, 2))
return NULL;
if (sigreturn[0] != 0x0a /* svc */)
}
+/* DWARF-2 frame support. */
+
+static void
+s390_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
+ struct dwarf2_frame_state_reg *reg)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ switch (tdep->abi)
+ {
+ case ABI_LINUX_S390:
+ /* Call-saved registers. */
+ if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM)
+ || regnum == S390_F4_REGNUM
+ || regnum == S390_F6_REGNUM)
+ reg->how = DWARF2_FRAME_REG_SAME_VALUE;
+
+ /* Call-clobbered registers. */
+ else if ((regnum >= S390_R0_REGNUM && regnum <= S390_R5_REGNUM)
+ || (regnum >= S390_F0_REGNUM && regnum <= S390_F15_REGNUM
+ && regnum != S390_F4_REGNUM && regnum != S390_F6_REGNUM))
+ reg->how = DWARF2_FRAME_REG_UNDEFINED;
+
+ /* The return address column. */
+ else if (regnum == S390_PC_REGNUM)
+ reg->how = DWARF2_FRAME_REG_RA;
+ break;
+
+ case ABI_LINUX_ZSERIES:
+ /* Call-saved registers. */
+ if ((regnum >= S390_R6_REGNUM && regnum <= S390_R15_REGNUM)
+ || (regnum >= S390_F8_REGNUM && regnum <= S390_F15_REGNUM))
+ reg->how = DWARF2_FRAME_REG_SAME_VALUE;
+
+ /* Call-clobbered registers. */
+ else if ((regnum >= S390_R0_REGNUM && regnum <= S390_R5_REGNUM)
+ || (regnum >= S390_F0_REGNUM && regnum <= S390_F7_REGNUM))
+ reg->how = DWARF2_FRAME_REG_UNDEFINED;
+
+ /* The return address column. */
+ else if (regnum == S390_PC_REGNUM)
+ reg->how = DWARF2_FRAME_REG_RA;
+ break;
+ }
+}
+
+
/* Dummy function calls. */
/* Return non-zero if TYPE is an integer-like type, zero otherwise.
Our caller has taken care of any type promotions needed to satisfy
prototypes or the old K&R argument-passing rules. */
static CORE_ADDR
-s390_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
+s390_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
/* Frame handling. */
set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
- frame_unwind_append_sniffer (gdbarch, s390_pltstub_frame_sniffer);
+ dwarf2_frame_set_init_reg (gdbarch, s390_dwarf2_frame_init_reg);
+ frame_unwind_append_sniffer (gdbarch, dwarf2_frame_sniffer);
+ frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
+ frame_unwind_append_sniffer (gdbarch, s390_stub_frame_sniffer);
frame_unwind_append_sniffer (gdbarch, s390_sigtramp_frame_sniffer);
frame_unwind_append_sniffer (gdbarch, s390_frame_sniffer);
frame_base_set_default (gdbarch, &s390_frame_base);
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