static CORE_ADDR
ppc_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
unsigned int insnbuf[POWERPC32_PLT_STUB_LEN];
struct gdbarch *gdbarch = get_frame_arch (frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR target = 0;
if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub, insnbuf))
{
/* Insn pattern is
lis r11, xxxx
lwz r11, xxxx(r11)
Branch target is in r11. */
target = (ppc_insn_d_field (insnbuf[0]) << 16)
| ppc_insn_d_field (insnbuf[1]);
target = read_memory_unsigned_integer (target, 4, byte_order);
}
if (ppc_insns_match_pattern (frame, pc, powerpc32_plt_stub_so, insnbuf))
{
/* Insn pattern is
lwz r11, xxxx(r30)
Branch target is in r11. */
target = get_frame_register_unsigned (frame, tdep->ppc_gp0_regnum + 30)
+ ppc_insn_d_field (insnbuf[0]);
target = read_memory_unsigned_integer (target, 4, byte_order);
}
return target;
}
static CORE_ADDR
ppc64_standard_linkage4_target (struct frame_info *frame, unsigned int *insn)
{
CORE_ADDR plt_off = ((ppc_insn_d_field (insn[1]) << 16)
+ ppc_insn_ds_field (insn[2]));
return ppc64_plt_entry_point (frame, plt_off);
}
static CORE_ADDR
ppc64_standard_linkage4_target (struct frame_info *frame,
CORE_ADDR pc, unsigned int *insn)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
CORE_ADDR plt
= ((CORE_ADDR) get_frame_register_unsigned (frame, tdep->ppc_gp0_regnum + 2)
+ (ppc_insn_d_field (insn[1]) << 16)
+ ppc_insn_ds_field (insn[2]));
return ppc64_plt_entry_point (gdbarch, plt);
}
static CORE_ADDR
ppc64_standard_linkage2_target (struct frame_info *frame,
CORE_ADDR pc, unsigned int *insn)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* The address of the PLT entry this linkage function references. */
CORE_ADDR plt
= ((CORE_ADDR) get_frame_register_unsigned (frame,
tdep->ppc_gp0_regnum + 2)
+ (ppc_insn_d_field (insn[1]) << 16)
+ ppc_insn_ds_field (insn[3]));
return ppc64_plt_entry_point (gdbarch, plt);
}
static CORE_ADDR
ppc64_standard_linkage2_target (struct frame_info *frame,
CORE_ADDR pc, unsigned int *insn)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* The address of the function descriptor this linkage function
references. */
CORE_ADDR desc
= ((CORE_ADDR) get_frame_register_unsigned (frame,
tdep->ppc_gp0_regnum + 2)
+ (ppc_insn_d_field (insn[1]) << 16)
+ ppc_insn_ds_field (insn[3]));
/* The first word of the descriptor is the entry point. Return that. */
return ppc64_desc_entry_point (gdbarch, desc);
}