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Diffstat (limited to 'gdb/rs6000-tdep.c')
-rw-r--r--gdb/rs6000-tdep.c92
1 files changed, 52 insertions, 40 deletions
diff --git a/gdb/rs6000-tdep.c b/gdb/rs6000-tdep.c
index e23d455..d21e87b 100644
--- a/gdb/rs6000-tdep.c
+++ b/gdb/rs6000-tdep.c
@@ -874,6 +874,7 @@ static int
rs6000_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
bfd_byte insn_buf[PPC_INSN_SIZE];
CORE_ADDR scan_pc, func_start, func_end, epilogue_start, epilogue_end;
unsigned long insn;
@@ -898,7 +899,7 @@ rs6000_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE))
return 0;
- insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE);
+ insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE, byte_order);
if (insn == 0x4e800020)
break;
/* Assume a bctr is a tail call unless it points strictly within
@@ -924,7 +925,7 @@ rs6000_in_function_epilogue_p (struct gdbarch *gdbarch, CORE_ADDR pc)
{
if (!safe_frame_unwind_memory (curfrm, scan_pc, insn_buf, PPC_INSN_SIZE))
return 0;
- insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE);
+ insn = extract_unsigned_integer (insn_buf, PPC_INSN_SIZE, byte_order);
if (insn_changes_sp_or_jumps (insn))
return 1;
}
@@ -971,10 +972,11 @@ ppc_displaced_step_fixup (struct gdbarch *gdbarch,
CORE_ADDR from, CORE_ADDR to,
struct regcache *regs)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* Since we use simple_displaced_step_copy_insn, our closure is a
copy of the instruction. */
ULONGEST insn = extract_unsigned_integer ((gdb_byte *) closure,
- PPC_INSN_SIZE);
+ PPC_INSN_SIZE, byte_order);
ULONGEST opcode = 0;
/* Offset for non PC-relative instructions. */
LONGEST offset = PPC_INSN_SIZE;
@@ -1072,11 +1074,12 @@ int
ppc_deal_with_atomic_sequence (struct frame_info *frame)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR pc = get_frame_pc (frame);
CORE_ADDR breaks[2] = {-1, -1};
CORE_ADDR loc = pc;
CORE_ADDR closing_insn; /* Instruction that closes the atomic sequence. */
- int insn = read_memory_integer (loc, PPC_INSN_SIZE);
+ int insn = read_memory_integer (loc, PPC_INSN_SIZE, byte_order);
int insn_count;
int index;
int last_breakpoint = 0; /* Defaults to 0 (no breakpoints placed). */
@@ -1094,7 +1097,7 @@ ppc_deal_with_atomic_sequence (struct frame_info *frame)
for (insn_count = 0; insn_count < atomic_sequence_length; ++insn_count)
{
loc += PPC_INSN_SIZE;
- insn = read_memory_integer (loc, PPC_INSN_SIZE);
+ insn = read_memory_integer (loc, PPC_INSN_SIZE, byte_order);
/* Assume that there is at most one conditional branch in the atomic
sequence. If a conditional branch is found, put a breakpoint in
@@ -1129,7 +1132,7 @@ ppc_deal_with_atomic_sequence (struct frame_info *frame)
closing_insn = loc;
loc += PPC_INSN_SIZE;
- insn = read_memory_integer (loc, PPC_INSN_SIZE);
+ insn = read_memory_integer (loc, PPC_INSN_SIZE, byte_order);
/* Insert a breakpoint right after the end of the atomic sequence. */
breaks[0] = loc;
@@ -1240,7 +1243,7 @@ store_param_on_stack_p (unsigned long op, int framep, int *r0_contains_arg)
they can use to access PIC data using PC-relative offsets. */
static int
-bl_to_blrl_insn_p (CORE_ADDR pc, int insn)
+bl_to_blrl_insn_p (CORE_ADDR pc, int insn, enum bfd_endian byte_order)
{
CORE_ADDR dest;
int immediate;
@@ -1254,7 +1257,7 @@ bl_to_blrl_insn_p (CORE_ADDR pc, int insn)
else
dest = pc + immediate;
- dest_insn = read_memory_integer (dest, 4);
+ dest_insn = read_memory_integer (dest, 4, byte_order);
if ((dest_insn & 0xfc00ffff) == 0x4c000021) /* blrl */
return 1;
@@ -1276,15 +1279,16 @@ bl_to_blrl_insn_p (CORE_ADDR pc, int insn)
#define BL_DISPLACEMENT_MASK 0x03fffffc
static unsigned long
-rs6000_fetch_instruction (const CORE_ADDR pc)
+rs6000_fetch_instruction (struct gdbarch *gdbarch, const CORE_ADDR pc)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
unsigned long op;
/* Fetch the instruction and convert it to an integer. */
if (target_read_memory (pc, buf, 4))
return 0;
- op = extract_unsigned_integer (buf, 4);
+ op = extract_unsigned_integer (buf, 4, byte_order);
return op;
}
@@ -1295,10 +1299,10 @@ rs6000_fetch_instruction (const CORE_ADDR pc)
instruction immediately past this sequence. Otherwise, return START_PC. */
static CORE_ADDR
-rs6000_skip_stack_check (const CORE_ADDR start_pc)
+rs6000_skip_stack_check (struct gdbarch *gdbarch, const CORE_ADDR start_pc)
{
CORE_ADDR pc = start_pc;
- unsigned long op = rs6000_fetch_instruction (pc);
+ unsigned long op = rs6000_fetch_instruction (gdbarch, pc);
/* First possible sequence: A small number of probes.
stw 0, -<some immediate>(1)
@@ -1310,7 +1314,7 @@ rs6000_skip_stack_check (const CORE_ADDR start_pc)
while ((op & 0xffff0000) == 0x90010000)
{
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
}
return pc;
}
@@ -1336,17 +1340,17 @@ rs6000_skip_stack_check (const CORE_ADDR start_pc)
/* lis 0,-<some immediate> */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xffff0000) != 0x3c000000)
break;
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
/* [possibly ori 0,0,<some immediate>] */
if ((op & 0xffff0000) == 0x60000000)
{
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
}
/* add 0,12,0 */
if (op != 0x7c0c0214)
@@ -1354,41 +1358,41 @@ rs6000_skip_stack_check (const CORE_ADDR start_pc)
/* cmpw 0,12,0 */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if (op != 0x7c0c0000)
break;
/* beq 0,<disp> */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xff9f0001) != 0x41820000)
break;
/* addi 12,12,-<some immediate> */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xffff0000) != 0x398c0000)
break;
/* stw 0,0(12) */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if (op != 0x900c0000)
break;
/* b <disp> */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xfc000001) != 0x48000000)
break;
/* [possibly one last probe: stw 0,<some immediate>(12)] */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xffff0000) == 0x900c0000)
{
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
}
/* We found a valid stack-check sequence, return the new PC. */
@@ -1425,26 +1429,26 @@ rs6000_skip_stack_check (const CORE_ADDR start_pc)
/* addic 0,0,-<some immediate> */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xffff0000) != 0x30000000)
break;
}
/* lis 12,<some immediate> */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xffff0000) != 0x3d800000)
break;
/* lwz 12,<some immediate>(12) */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xffff0000) != 0x818c0000)
break;
/* twllt 0,12 */
pc = pc + 4;
- op = rs6000_fetch_instruction (pc);
+ op = rs6000_fetch_instruction (gdbarch, pc);
if ((op & 0xfffffffe) != 0x7c406008)
break;
@@ -1504,6 +1508,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc,
int r0_contains_arg = 0;
const struct bfd_arch_info *arch_info = gdbarch_bfd_arch_info (gdbarch);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
memset (fdata, 0, sizeof (struct rs6000_framedata));
fdata->saved_gpr = -1;
@@ -1515,7 +1520,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc,
fdata->nosavedpc = 1;
fdata->lr_register = -1;
- pc = rs6000_skip_stack_check (pc);
+ pc = rs6000_skip_stack_check (gdbarch, pc);
if (pc >= lim_pc)
pc = lim_pc;
@@ -1537,7 +1542,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc,
/* Fetch the instruction and convert it to an integer. */
if (target_read_memory (pc, buf, 4))
break;
- op = extract_unsigned_integer (buf, 4);
+ op = extract_unsigned_integer (buf, 4, byte_order);
if ((op & 0xfc1fffff) == 0x7c0802a6)
{ /* mflr Rx */
@@ -1709,7 +1714,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc,
/* If the return address has already been saved, we can skip
calls to blrl (for PIC). */
- if (lr_reg != -1 && bl_to_blrl_insn_p (pc, op))
+ if (lr_reg != -1 && bl_to_blrl_insn_p (pc, op, byte_order))
{
fdata->used_bl = 1;
continue;
@@ -1729,7 +1734,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc,
break;
}
- op = read_memory_integer (pc + 4, 4);
+ op = read_memory_integer (pc + 4, 4, byte_order);
/* At this point, make sure this is not a trampoline
function (a function that simply calls another functions,
@@ -2047,7 +2052,7 @@ skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc, CORE_ADDR lim_pc,
if ((op & 0xfc000001) == 0x48000001)
{ /* bl foo, an initializer function? */
- op = read_memory_integer (pc + 4, 4);
+ op = read_memory_integer (pc + 4, 4, byte_order);
if (op == 0x4def7b82)
{ /* cror 0xf, 0xf, 0xf (nop) */
@@ -2112,12 +2117,13 @@ rs6000_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
static CORE_ADDR
rs6000_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
unsigned long op;
if (target_read_memory (pc, buf, 4))
return pc;
- op = extract_unsigned_integer (buf, 4);
+ op = extract_unsigned_integer (buf, 4, byte_order);
if ((op & BL_MASK) == BL_INSTRUCTION)
{
@@ -2168,7 +2174,8 @@ rs6000_frame_align (struct gdbarch *gdbarch, CORE_ADDR addr)
@FIX code. */
static int
-rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name)
+rs6000_in_solib_return_trampoline (struct gdbarch *gdbarch,
+ CORE_ADDR pc, char *name)
{
return name && !strncmp (name, "@FIX", 4);
}
@@ -2190,7 +2197,9 @@ rs6000_in_solib_return_trampoline (CORE_ADDR pc, char *name)
static CORE_ADDR
rs6000_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
{
- struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (frame));
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
unsigned int ii, op;
int rel;
CORE_ADDR solib_target_pc;
@@ -2211,10 +2220,11 @@ rs6000_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
/* Check for bigtoc fixup code. */
msymbol = lookup_minimal_symbol_by_pc (pc);
if (msymbol
- && rs6000_in_solib_return_trampoline (pc, SYMBOL_LINKAGE_NAME (msymbol)))
+ && rs6000_in_solib_return_trampoline (gdbarch, pc,
+ SYMBOL_LINKAGE_NAME (msymbol)))
{
/* Double-check that the third instruction from PC is relative "b". */
- op = read_memory_integer (pc + 8, 4);
+ op = read_memory_integer (pc + 8, 4, byte_order);
if ((op & 0xfc000003) == 0x48000000)
{
/* Extract bits 6-29 as a signed 24-bit relative word address and
@@ -2231,12 +2241,12 @@ rs6000_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
for (ii = 0; trampoline_code[ii]; ++ii)
{
- op = read_memory_integer (pc + (ii * 4), 4);
+ op = read_memory_integer (pc + (ii * 4), 4, byte_order);
if (op != trampoline_code[ii])
return 0;
}
ii = get_frame_register_unsigned (frame, 11); /* r11 holds destination addr */
- pc = read_memory_unsigned_integer (ii, tdep->wordsize); /* (r11) value */
+ pc = read_memory_unsigned_integer (ii, tdep->wordsize, byte_order);
return pc;
}
@@ -3039,6 +3049,7 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache)
struct rs6000_frame_cache *cache;
struct gdbarch *gdbarch = get_frame_arch (this_frame);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct rs6000_framedata fdata;
int wordsize = tdep->wordsize;
CORE_ADDR func, pc;
@@ -3096,7 +3107,8 @@ rs6000_frame_cache (struct frame_info *this_frame, void **this_cache)
if (!fdata.frameless)
/* Frameless really means stackless. */
- cache->base = read_memory_unsigned_integer (cache->base, wordsize);
+ cache->base
+ = read_memory_unsigned_integer (cache->base, wordsize, byte_order);
trad_frame_set_value (cache->saved_regs,
gdbarch_sp_regnum (gdbarch), cache->base);
generated by cgit v1.1 at 2024-11-23 22:58:03 +0000