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Diffstat (limited to 'gdb/i386-tdep.c')
-rw-r--r--gdb/i386-tdep.c118
1 files changed, 75 insertions, 43 deletions
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 8d5a537..1bb5ec2 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -414,6 +414,8 @@ i386_displaced_step_fixup (struct gdbarch *gdbarch,
CORE_ADDR from, CORE_ADDR to,
struct regcache *regs)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
/* The offset we applied to the instruction's address.
This could well be negative (when viewed as a signed 32-bit
value), but ULONGEST won't reflect that, so take care when
@@ -521,9 +523,9 @@ i386_displaced_step_fixup (struct gdbarch *gdbarch,
const ULONGEST retaddr_len = 4;
regcache_cooked_read_unsigned (regs, I386_ESP_REGNUM, &esp);
- retaddr = read_memory_unsigned_integer (esp, retaddr_len);
+ retaddr = read_memory_unsigned_integer (esp, byte_order, retaddr_len);
retaddr = (retaddr - insn_offset) & 0xffffffffUL;
- write_memory_unsigned_integer (esp, retaddr_len, retaddr);
+ write_memory_unsigned_integer (esp, retaddr_len, byte_order, retaddr);
if (debug_displaced)
fprintf_unfiltered (gdb_stdlog,
@@ -595,8 +597,9 @@ i386_alloc_frame_cache (void)
target. Otherwise, return PC. */
static CORE_ADDR
-i386_follow_jump (CORE_ADDR pc)
+i386_follow_jump (struct gdbarch *gdbarch, CORE_ADDR pc)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte op;
long delta = 0;
int data16 = 0;
@@ -605,7 +608,7 @@ i386_follow_jump (CORE_ADDR pc)
if (op == 0x66)
{
data16 = 1;
- op = read_memory_unsigned_integer (pc + 1, 1);
+ op = read_memory_unsigned_integer (pc + 1, 1, byte_order);
}
switch (op)
@@ -614,7 +617,7 @@ i386_follow_jump (CORE_ADDR pc)
/* Relative jump: if data16 == 0, disp32, else disp16. */
if (data16)
{
- delta = read_memory_integer (pc + 2, 2);
+ delta = read_memory_integer (pc + 2, 2, byte_order);
/* Include the size of the jmp instruction (including the
0x66 prefix). */
@@ -622,7 +625,7 @@ i386_follow_jump (CORE_ADDR pc)
}
else
{
- delta = read_memory_integer (pc + 1, 4);
+ delta = read_memory_integer (pc + 1, 4, byte_order);
/* Include the size of the jmp instruction. */
delta += 5;
@@ -630,7 +633,7 @@ i386_follow_jump (CORE_ADDR pc)
break;
case 0xeb:
/* Relative jump, disp8 (ignore data16). */
- delta = read_memory_integer (pc + data16 + 1, 1);
+ delta = read_memory_integer (pc + data16 + 1, 1, byte_order);
delta += data16 + 2;
break;
@@ -1006,9 +1009,11 @@ i386_skip_noop (CORE_ADDR pc)
whichever is smaller. If we don't recognize the code, return PC. */
static CORE_ADDR
-i386_analyze_frame_setup (CORE_ADDR pc, CORE_ADDR limit,
+i386_analyze_frame_setup (struct gdbarch *gdbarch,
+ CORE_ADDR pc, CORE_ADDR limit,
struct i386_frame_cache *cache)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct i386_insn *insn;
gdb_byte op;
int skip = 0;
@@ -1057,11 +1062,13 @@ i386_analyze_frame_setup (CORE_ADDR pc, CORE_ADDR limit,
switch (op)
{
case 0x8b:
- if (read_memory_unsigned_integer (pc + skip + 1, 1) != 0xec)
+ if (read_memory_unsigned_integer (pc + skip + 1, 1, byte_order)
+ != 0xec)
return pc;
break;
case 0x89:
- if (read_memory_unsigned_integer (pc + skip + 1, 1) != 0xe5)
+ if (read_memory_unsigned_integer (pc + skip + 1, 1, byte_order)
+ != 0xe5)
return pc;
break;
default:
@@ -1089,24 +1096,24 @@ i386_analyze_frame_setup (CORE_ADDR pc, CORE_ADDR limit,
if (op == 0x83)
{
/* `subl' with 8-bit immediate. */
- if (read_memory_unsigned_integer (pc + 1, 1) != 0xec)
+ if (read_memory_unsigned_integer (pc + 1, 1, byte_order) != 0xec)
/* Some instruction starting with 0x83 other than `subl'. */
return pc;
/* `subl' with signed 8-bit immediate (though it wouldn't
make sense to be negative). */
- cache->locals = read_memory_integer (pc + 2, 1);
+ cache->locals = read_memory_integer (pc + 2, 1, byte_order);
return pc + 3;
}
else if (op == 0x81)
{
/* Maybe it is `subl' with a 32-bit immediate. */
- if (read_memory_unsigned_integer (pc + 1, 1) != 0xec)
+ if (read_memory_unsigned_integer (pc + 1, 1, byte_order) != 0xec)
/* Some instruction starting with 0x81 other than `subl'. */
return pc;
/* It is `subl' with a 32-bit immediate. */
- cache->locals = read_memory_integer (pc + 2, 4);
+ cache->locals = read_memory_integer (pc + 2, 4, byte_order);
return pc + 6;
}
else
@@ -1117,7 +1124,7 @@ i386_analyze_frame_setup (CORE_ADDR pc, CORE_ADDR limit,
}
else if (op == 0xc8) /* enter */
{
- cache->locals = read_memory_unsigned_integer (pc + 1, 2);
+ cache->locals = read_memory_unsigned_integer (pc + 1, 2, byte_order);
return pc + 4;
}
@@ -1182,15 +1189,16 @@ i386_analyze_register_saves (CORE_ADDR pc, CORE_ADDR current_pc,
instruction will be a branch back to the start. */
static CORE_ADDR
-i386_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc,
+i386_analyze_prologue (struct gdbarch *gdbarch,
+ CORE_ADDR pc, CORE_ADDR current_pc,
struct i386_frame_cache *cache)
{
pc = i386_skip_noop (pc);
- pc = i386_follow_jump (pc);
+ pc = i386_follow_jump (gdbarch, pc);
pc = i386_analyze_struct_return (pc, current_pc, cache);
pc = i386_skip_probe (pc);
pc = i386_analyze_stack_align (pc, current_pc, cache);
- pc = i386_analyze_frame_setup (pc, current_pc, cache);
+ pc = i386_analyze_frame_setup (gdbarch, pc, current_pc, cache);
return i386_analyze_register_saves (pc, current_pc, cache);
}
@@ -1199,6 +1207,8 @@ i386_analyze_prologue (CORE_ADDR pc, CORE_ADDR current_pc,
static CORE_ADDR
i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
static gdb_byte pic_pat[6] =
{
0xe8, 0, 0, 0, 0, /* call 0x0 */
@@ -1210,7 +1220,7 @@ i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
int i;
cache.locals = -1;
- pc = i386_analyze_prologue (start_pc, 0xffffffff, &cache);
+ pc = i386_analyze_prologue (gdbarch, start_pc, 0xffffffff, &cache);
if (cache.locals < 0)
return start_pc;
@@ -1243,7 +1253,7 @@ i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
if (op == 0x89) /* movl %ebx, x(%ebp) */
{
- op = read_memory_unsigned_integer (pc + delta + 1, 1);
+ op = read_memory_unsigned_integer (pc + delta + 1, 1, byte_order);
if (op == 0x5d) /* One byte offset from %ebp. */
delta += 3;
@@ -1257,7 +1267,8 @@ i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
/* addl y,%ebx */
if (delta > 0 && op == 0x81
- && read_memory_unsigned_integer (pc + delta + 1, 1) == 0xc3)
+ && read_memory_unsigned_integer (pc + delta + 1, 1, byte_order)
+ == 0xc3)
{
pc += delta + 6;
}
@@ -1266,8 +1277,8 @@ i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
/* If the function starts with a branch (to startup code at the end)
the last instruction should bring us back to the first
instruction of the real code. */
- if (i386_follow_jump (start_pc) != start_pc)
- pc = i386_follow_jump (pc);
+ if (i386_follow_jump (gdbarch, start_pc) != start_pc)
+ pc = i386_follow_jump (gdbarch, pc);
return pc;
}
@@ -1278,6 +1289,7 @@ i386_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
CORE_ADDR
i386_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte op;
target_read_memory (pc, &op, 1);
@@ -1290,8 +1302,9 @@ i386_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
/* Make sure address is computed correctly as a 32bit
integer even if CORE_ADDR is 64 bit wide. */
struct minimal_symbol *s;
- CORE_ADDR call_dest = pc + 5 + extract_signed_integer (buf, 4);
+ CORE_ADDR call_dest;
+ call_dest = pc + 5 + extract_signed_integer (buf, 4, byte_order);
call_dest = call_dest & 0xffffffffU;
s = lookup_minimal_symbol_by_pc (call_dest);
if (s != NULL
@@ -1321,6 +1334,8 @@ i386_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
static struct i386_frame_cache *
i386_frame_cache (struct frame_info *this_frame, void **this_cache)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct i386_frame_cache *cache;
gdb_byte buf[4];
int i;
@@ -1341,7 +1356,7 @@ i386_frame_cache (struct frame_info *this_frame, void **this_cache)
in progress when the signal occurred. */
get_frame_register (this_frame, I386_EBP_REGNUM, buf);
- cache->base = extract_unsigned_integer (buf, 4);
+ cache->base = extract_unsigned_integer (buf, 4, byte_order);
if (cache->base == 0)
return cache;
@@ -1350,13 +1365,14 @@ i386_frame_cache (struct frame_info *this_frame, void **this_cache)
cache->pc = get_frame_func (this_frame);
if (cache->pc != 0)
- i386_analyze_prologue (cache->pc, get_frame_pc (this_frame), cache);
+ i386_analyze_prologue (gdbarch, cache->pc, get_frame_pc (this_frame),
+ cache);
if (cache->saved_sp_reg != -1)
{
/* Saved stack pointer has been saved. */
get_frame_register (this_frame, cache->saved_sp_reg, buf);
- cache->saved_sp = extract_unsigned_integer(buf, 4);
+ cache->saved_sp = extract_unsigned_integer (buf, 4, byte_order);
}
if (cache->locals < 0)
@@ -1381,7 +1397,8 @@ i386_frame_cache (struct frame_info *this_frame, void **this_cache)
else
{
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
- cache->base = extract_unsigned_integer (buf, 4) + cache->sp_offset;
+ cache->base = extract_unsigned_integer (buf, 4, byte_order)
+ + cache->sp_offset;
}
}
@@ -1477,8 +1494,10 @@ static const struct frame_unwind i386_frame_unwind =
static struct i386_frame_cache *
i386_sigtramp_frame_cache (struct frame_info *this_frame, void **this_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 i386_frame_cache *cache;
- struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
CORE_ADDR addr;
gdb_byte buf[4];
@@ -1488,7 +1507,7 @@ i386_sigtramp_frame_cache (struct frame_info *this_frame, void **this_cache)
cache = i386_alloc_frame_cache ();
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
- cache->base = extract_unsigned_integer (buf, 4) - 4;
+ cache->base = extract_unsigned_integer (buf, 4, byte_order) - 4;
addr = tdep->sigcontext_addr (this_frame);
if (tdep->sc_reg_offset)
@@ -1612,6 +1631,7 @@ i386_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
gdb_byte buf[4];
CORE_ADDR sp, jb_addr;
struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int jb_pc_offset = gdbarch_tdep (gdbarch)->jb_pc_offset;
/* If JB_PC_OFFSET is -1, we have no way to find out where the
@@ -1620,15 +1640,15 @@ i386_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
return 0;
get_frame_register (frame, I386_ESP_REGNUM, buf);
- sp = extract_unsigned_integer (buf, 4);
+ sp = extract_unsigned_integer (buf, 4, byte_order);
if (target_read_memory (sp + 4, buf, 4))
return 0;
- jb_addr = extract_unsigned_integer (buf, 4);
+ jb_addr = extract_unsigned_integer (buf, 4, byte_order);
if (target_read_memory (jb_addr + jb_pc_offset, buf, 4))
return 0;
- *pc = extract_unsigned_integer (buf, 4);
+ *pc = extract_unsigned_integer (buf, 4, byte_order);
return 1;
}
@@ -1667,6 +1687,7 @@ i386_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct value **args, CORE_ADDR sp, int struct_return,
CORE_ADDR struct_addr)
{
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
int i;
int write_pass;
@@ -1686,7 +1707,7 @@ i386_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
if (write_pass)
{
/* Push value address. */
- store_unsigned_integer (buf, 4, struct_addr);
+ store_unsigned_integer (buf, 4, byte_order, struct_addr);
write_memory (sp, buf, 4);
args_space_used += 4;
}
@@ -1735,11 +1756,11 @@ i386_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
/* Store return address. */
sp -= 4;
- store_unsigned_integer (buf, 4, bp_addr);
+ store_unsigned_integer (buf, 4, byte_order, bp_addr);
write_memory (sp, buf, 4);
/* Finally, update the stack pointer... */
- store_unsigned_integer (buf, 4, sp);
+ store_unsigned_integer (buf, 4, byte_order, sp);
regcache_cooked_write (regcache, I386_ESP_REGNUM, buf);
/* ...and fake a frame pointer. */
@@ -2500,11 +2521,17 @@ i386_regset_from_core_section (struct gdbarch *gdbarch,
/* Stuff for WIN32 PE style DLL's but is pretty generic really. */
CORE_ADDR
-i386_pe_skip_trampoline_code (CORE_ADDR pc, char *name)
+i386_pe_skip_trampoline_code (struct frame_info *frame,
+ CORE_ADDR pc, char *name)
{
- if (pc && read_memory_unsigned_integer (pc, 2) == 0x25ff) /* jmp *(dest) */
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+
+ /* jmp *(dest) */
+ if (pc && read_memory_unsigned_integer (pc, 2, byte_order) == 0x25ff)
{
- unsigned long indirect = read_memory_unsigned_integer (pc + 2, 4);
+ unsigned long indirect =
+ read_memory_unsigned_integer (pc + 2, 4, byte_order);
struct minimal_symbol *indsym =
indirect ? lookup_minimal_symbol_by_pc (indirect) : 0;
char *symname = indsym ? SYMBOL_LINKAGE_NAME (indsym) : 0;
@@ -2513,7 +2540,8 @@ i386_pe_skip_trampoline_code (CORE_ADDR pc, char *name)
{
if (strncmp (symname, "__imp_", 6) == 0
|| strncmp (symname, "_imp_", 5) == 0)
- return name ? 1 : read_memory_unsigned_integer (indirect, 4);
+ return name ? 1 :
+ read_memory_unsigned_integer (indirect, 4, byte_order);
}
}
return 0; /* Not a trampoline. */
@@ -2581,13 +2609,15 @@ i386_svr4_sigtramp_p (struct frame_info *this_frame)
static CORE_ADDR
i386_svr4_sigcontext_addr (struct frame_info *this_frame)
{
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
gdb_byte buf[4];
CORE_ADDR sp;
get_frame_register (this_frame, I386_ESP_REGNUM, buf);
- sp = extract_unsigned_integer (buf, 4);
+ sp = extract_unsigned_integer (buf, 4, byte_order);
- return read_memory_unsigned_integer (sp + 8, 4);
+ return read_memory_unsigned_integer (sp + 8, 4, byte_order);
}
@@ -2704,8 +2734,10 @@ static CORE_ADDR
i386_fetch_pointer_argument (struct frame_info *frame, int argi,
struct type *type)
{
+ struct gdbarch *gdbarch = get_frame_arch (frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR sp = get_frame_register_unsigned (frame, I386_ESP_REGNUM);
- return read_memory_unsigned_integer (sp + (4 * (argi + 1)), 4);
+ return read_memory_unsigned_integer (sp + (4 * (argi + 1)), 4, byte_order);
}
static void
generated by cgit v1.1 at 2024-12-12 03:58:10 +0000