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Diffstat (limited to 'gas/config/tc-avr.c')
-rw-r--r--gas/config/tc-avr.c225
1 files changed, 156 insertions, 69 deletions
diff --git a/gas/config/tc-avr.c b/gas/config/tc-avr.c
index 97f614d..8e7b304 100644
--- a/gas/config/tc-avr.c
+++ b/gas/config/tc-avr.c
@@ -96,6 +96,16 @@ static struct mcu_type_s mcu_types[] =
static struct mcu_type_s default_mcu = {"avr2", AVR_ISA_2xxx,bfd_mach_avr2};
static struct mcu_type_s *avr_mcu = &default_mcu;
+/* AVR target-specific switches. */
+struct avr_opt_s
+{
+ int all_opcodes; /* -mall-opcodes: accept all known AVR opcodes */
+ int no_skip_bug; /* -mno-skip-bug: no warnings for skipping 2-word insns */
+ int no_wrap; /* -mno-wrap: reject rjmp/rcall with 8K wrap-around */
+};
+
+static struct avr_opt_s avr_opt = { 0, 0, 0 };
+
const char EXP_CHARS[] = "eE";
const char FLT_CHARS[] = "dD";
static void avr_set_arch (int dummy);
@@ -109,6 +119,7 @@ const pseudo_typeS md_pseudo_table[] =
#define LDI_IMMEDIATE(x) (((x) & 0xf) | (((x) << 4) & 0xf00))
+static void show_mcu_list (FILE *stream);
static char * skip_space (char * s);
static char * extract_word (char *from, char *to, int limit);
static unsigned int avr_operand (struct avr_opcodes_s *opcode,
@@ -150,14 +161,47 @@ static struct hash_control *avr_hash;
/* Reloc modifiers hash control (hh8,hi8,lo8,pm_xx). */
static struct hash_control *avr_mod_hash;
-#define OPTION_MMCU (OPTION_MD_BASE + 1)
+#define OPTION_MMCU 'm'
+#define OPTION_ALL_OPCODES (OPTION_MD_BASE + 1)
+#define OPTION_NO_SKIP_BUG (OPTION_MD_BASE + 2)
+#define OPTION_NO_WRAP (OPTION_MD_BASE + 3)
struct option md_longopts[] = {
- {"mmcu", required_argument, NULL, 'm'},
- {NULL, no_argument, NULL, 0}
+ { "mmcu", required_argument, NULL, OPTION_MMCU },
+ { "mall-opcodes", no_argument, NULL, OPTION_ALL_OPCODES },
+ { "mno-skip-bug", no_argument, NULL, OPTION_NO_SKIP_BUG },
+ { "mno-wrap", no_argument, NULL, OPTION_NO_WRAP },
+ { NULL, no_argument, NULL, 0 }
};
size_t md_longopts_size = sizeof(md_longopts);
+
+/* Display nicely formatted list of known MCU names. */
+static void
+show_mcu_list (FILE *stream)
+{
+ int i, x;
+
+ fprintf (stream, _("Known MCU names:"));
+ x = 1000;
+ for (i = 0; mcu_types[i].name; i++)
+ {
+ int len = strlen (mcu_types[i].name);
+ x += len + 1;
+ if (x < 75)
+ {
+ fprintf (stream, " %s", mcu_types[i].name);
+ }
+ else
+ {
+ fprintf (stream, "\n %s", mcu_types[i].name);
+ x = len + 2;
+ }
+ }
+ fprintf (stream, "\n");
+}
+
+
static inline char *
skip_space (s)
char * s;
@@ -202,9 +246,8 @@ void
md_show_usage (stream)
FILE *stream;
{
- fprintf
- (stream,
- _ ("AVR options:\n"
+ fprintf (stream,
+ _("AVR options:\n"
" -mmcu=[avr-name] select microcontroller variant\n"
" [avr-name] can be:\n"
" avr1 - AT90S1200, ATtiny1x, ATtiny28\n"
@@ -213,6 +256,13 @@ md_show_usage (stream)
" avr4 - ATmega83, ATmega85\n"
" avr5 - ATmega161, ATmega163, ATmega32, AT94K\n"
" or immediate microcontroller name.\n"));
+ fprintf (stream,
+ _(" -mall-opcodes accept all AVR opcodes, even if not supported by MCU\n"
+ " -mno-skip-bug disable warnings for skipping two-word instructions\n"
+ " (default for avr4, avr5)\n"
+ " -mno-wrap reject rjmp/rcall instructions with 8K wrap-around\n"
+ " (default for avr3, avr5)\n"));
+ show_mcu_list (stream);
}
static void
@@ -222,7 +272,7 @@ avr_set_arch (dummy)
char * str;
str = (char *)alloca (20);
input_line_pointer = extract_word (input_line_pointer, str, 20);
- md_parse_option ('m', str);
+ md_parse_option (OPTION_MMCU, str);
bfd_set_arch_mach (stdoutput, TARGET_ARCH, avr_mcu->mach);
}
@@ -231,33 +281,51 @@ md_parse_option (c, arg)
int c;
char *arg;
{
- char *t = alloca (strlen (arg) + 1);
- char *s = t;
- char *arg1 = arg;
- do
- *t = tolower (*arg1++);
- while (*t++);
-
- if (c == 'm')
+ switch (c)
{
- int i;
+ case OPTION_MMCU:
+ {
+ int i;
+ char *s = alloca (strlen (arg) + 1);
- for (i = 0; mcu_types[i].name; ++i)
- if (strcmp (mcu_types[i].name, s) == 0)
- break;
+ {
+ char *t = s;
+ char *arg1 = arg;
+
+ do
+ *t = tolower(*arg1++);
+ while (*t++);
+ }
+
+ for (i = 0; mcu_types[i].name; ++i)
+ if (strcmp (mcu_types[i].name, s) == 0)
+ break;
- if (!mcu_types[i].name)
- as_fatal (_ ("unknown MCU: %s\n"), arg);
+ if (!mcu_types[i].name)
+ {
+ show_mcu_list (stderr);
+ as_fatal (_("unknown MCU: %s\n"), arg);
+ }
- /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
- type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
- as .arch ... in the asm output at the same time. */
+ /* It is OK to redefine mcu type within the same avr[1-5] bfd machine
+ type - this for allows passing -mmcu=... via gcc ASM_SPEC as well
+ as .arch ... in the asm output at the same time. */
- if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
- avr_mcu = &mcu_types[i];
- else
- as_fatal (_ ("redefinition of mcu type `%s' to `%s'"),
- avr_mcu->name, mcu_types[i].name);
+ if (avr_mcu == &default_mcu || avr_mcu->mach == mcu_types[i].mach)
+ avr_mcu = &mcu_types[i];
+ else
+ as_fatal (_("redefinition of mcu type `%s' to `%s'"),
+ avr_mcu->name, mcu_types[i].name);
+ return 1;
+ }
+ case OPTION_ALL_OPCODES:
+ avr_opt.all_opcodes = 1;
+ return 1;
+ case OPTION_NO_SKIP_BUG:
+ avr_opt.no_skip_bug = 1;
+ return 1;
+ case OPTION_NO_WRAP:
+ avr_opt.no_wrap = 1;
return 1;
}
return 0;
@@ -413,7 +481,7 @@ avr_operands (opcode, line)
str = skip_space (str);
if (*str++ != ',')
- as_bad (_ ("`,' required"));
+ as_bad (_("`,' required"));
str = skip_space (str);
reg2 = avr_operand (opcode, where, op, &str);
@@ -429,22 +497,29 @@ avr_operands (opcode, line)
bin |= reg1 | reg2;
}
- /* detect undefined combinations (like lpm r31,Z+) */
- if (((bin & 0xFDEF) == 0x91AD) || ((bin & 0xFDEF) == 0x91AE) ||
- ((bin & 0xFDEF) == 0x91C9) || ((bin & 0xFDEF) == 0x91CA) ||
- ((bin & 0xFDEF) == 0x91E1) || ((bin & 0xFDEF) == 0x91E2) ||
- ((bin & 0xFFED) == 0x91E5))
- as_warn( _("undefined combination of operands"));
-
+ if (!avr_opt.all_opcodes)
+ {
+ /* Detect undefined combinations (like ld r31,Z+). */
+ if (((bin & 0xFDEF) == 0x91AD) || ((bin & 0xFDEF) == 0x91AE) ||
+ ((bin & 0xFDEF) == 0x91C9) || ((bin & 0xFDEF) == 0x91CA) ||
+ ((bin & 0xFDEF) == 0x91E1) || ((bin & 0xFDEF) == 0x91E2) ||
+ ((bin & 0xFFED) == 0x91E5))
+ as_warn (_("undefined combination of operands"));
+ }
+
if (opcode->insn_size == 2)
{
- /* warn if previous opcode was cpse/sbic/sbis/sbrc/sbrs
- (AVR core bug) */
- if ((prev & 0xFC00) == 0x1000
- || (prev & 0xFD00) == 0x9900
- || (prev & 0xFC08) == 0xFC00)
- as_warn (_("skipping two-word instruction"));
-
+ /* Warn if the previous opcode was cpse/sbic/sbis/sbrc/sbrs
+ (AVR core bug, fixed in the newer devices). */
+
+ if (!((avr_mcu->isa & AVR_ISA_MUL) || avr_opt.no_skip_bug))
+ {
+ if ((prev & 0xFC00) == 0x1000
+ || (prev & 0xFD00) == 0x9900
+ || (prev & 0xFC08) == 0xFC00)
+ as_warn (_("skipping two-word instruction"));
+ }
+
bfd_putl32 ((bfd_vma)bin, frag);
}
else
@@ -508,32 +583,32 @@ avr_operand (opcode, where, op, line)
{
case 'a':
if (op_mask < 16 || op_mask > 23)
- as_bad (_ ("register r16-r23 required"));
+ as_bad (_("register r16-r23 required"));
op_mask -= 16;
break;
case 'd':
if (op_mask < 16)
- as_bad (_ ("register number above 15 required"));
+ as_bad (_("register number above 15 required"));
op_mask -= 16;
break;
case 'v':
if (op_mask & 1)
- as_bad (_ ("even register number required"));
+ as_bad (_("even register number required"));
op_mask >>= 1;
break;
case 'w':
op_mask -= 24;
if (op_mask & 1 || op_mask > 6)
- as_bad (_ ("register r24,r26,r28 or r30 required"));
+ as_bad (_("register r24, r26, r28 or r30 required"));
op_mask >>= 1;
break;
}
break;
}
- as_bad (_ ("register name or number from 0 to 31 required"));
+ as_bad (_("register name or number from 0 to 31 required"));
}
break;
@@ -551,32 +626,33 @@ avr_operand (opcode, where, op, line)
else if (c == 'y')
op_mask |= 0x8;
else if (c != 'z')
- as_bad (_ ("pointer register (X,Y or Z) required"));
+ as_bad (_("pointer register (X, Y or Z) required"));
str = skip_space (str+1);
if (*str == '+')
{
++str;
if (op_mask & 2)
- as_bad (_ ("cannot both predecrement and postincrement"));
+ as_bad (_("cannot both predecrement and postincrement"));
op_mask |= 0x1001;
}
/* avr1 can do "ld r,Z" and "st Z,r" but no other pointer
registers, no predecrement, no postincrement. */
- if ((op_mask & 0x100F) && !(avr_mcu->isa & AVR_ISA_SRAM))
- as_bad (_ ("addressing mode not supported"));
+ if (!avr_opt.all_opcodes && (op_mask & 0x100F)
+ && !(avr_mcu->isa & AVR_ISA_SRAM))
+ as_bad (_("addressing mode not supported"));
}
break;
case 'z':
{
if (*str == '-')
- as_bad (_ ("can't predecrement"));
+ as_bad (_("can't predecrement"));
if (! (*str == 'z' || *str == 'Z'))
- as_bad (_ ("pointer register Z required"));
+ as_bad (_("pointer register Z required"));
str = skip_space (str + 1);
if (*str == '+')
@@ -593,7 +669,7 @@ avr_operand (opcode, where, op, line)
if (c == 'y')
op_mask |= 0x8;
else if (c != 'z')
- as_bad (_ ("pointer register (Y or Z) required"));
+ as_bad (_("pointer register (Y or Z) required"));
str = skip_space (str);
if (*str++ == '+')
{
@@ -702,7 +778,7 @@ avr_operand (opcode, where, op, line)
case '?':
break;
default:
- as_bad (_ ("unknown constraint `%c'"), *op);
+ as_bad (_("unknown constraint `%c'"), *op);
}
*line = str;
return op_mask;
@@ -778,7 +854,7 @@ md_apply_fix3 (fixp, valuep, seg)
{
/* We don't actually support subtracting a symbol. */
as_bad_where (fixp->fx_file, fixp->fx_line,
- _ ("expression too complex"));
+ _("expression too complex"));
}
}
}
@@ -829,7 +905,7 @@ md_apply_fix3 (fixp, valuep, seg)
if (value < -2048 || value > 2047)
{
/* No wrap for devices with >8K of program memory. */
- if (avr_mcu->isa & AVR_ISA_MEGA)
+ if ((avr_mcu->isa & AVR_ISA_MEGA) || avr_opt.no_wrap)
as_bad_where (fixp->fx_file, fixp->fx_line,
_("operand out of range: %ld"), value);
}
@@ -1007,13 +1083,13 @@ md_assemble (str)
str = skip_space (extract_word (str, op, sizeof(op)));
if (!op[0])
- as_bad (_ ("can't find opcode "));
+ as_bad (_("can't find opcode "));
opcode = (struct avr_opcodes_s *) hash_find (avr_hash, op);
if (opcode == NULL)
{
- as_bad (_ ("unknown opcode `%s'"), op);
+ as_bad (_("unknown opcode `%s'"), op);
return;
}
@@ -1023,8 +1099,8 @@ md_assemble (str)
if (*str && *opcode->constraints == '?')
++opcode;
- if ((opcode->isa & avr_mcu->isa) != opcode->isa)
- as_bad (_ ("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
+ if (!avr_opt.all_opcodes && (opcode->isa & avr_mcu->isa) != opcode->isa)
+ as_bad (_("illegal opcode %s for mcu %s"), opcode->name, avr_mcu->name);
/* We used to set input_line_pointer to the result of get_operands,
but that is wrong. Our caller assumes we don't change it. */
@@ -1032,7 +1108,7 @@ md_assemble (str)
char *t = input_line_pointer;
avr_operands (opcode, &str);
if (*skip_space (str))
- as_bad (_ ("garbage at end of line"));
+ as_bad (_("garbage at end of line"));
input_line_pointer = t;
}
}
@@ -1090,7 +1166,7 @@ avr_ldi_expression (exp)
++closes;
}
else
- as_bad (_ ("illegal expression"));
+ as_bad (_("illegal expression"));
if (*str == '-')
{
neg_p = 1;
@@ -1112,7 +1188,7 @@ avr_ldi_expression (exp)
{
if (*input_line_pointer != ')')
{
- as_bad (_ ("`)' required"));
+ as_bad (_("`)' required"));
break;
}
input_line_pointer++;
@@ -1124,6 +1200,17 @@ avr_ldi_expression (exp)
}
input_line_pointer = tmp;
expression (exp);
+
+ /* Warn about expressions that fail to use lo8(). */
+ if (exp->X_op == O_constant)
+ {
+ int x = exp->X_add_number;
+ if (x < -255 || x > 255)
+ as_warn (_("constant out of 8-bit range: %d"), x);
+ }
+ else
+ as_warn (_("expression possibly out of 8-bit range"));
+
return BFD_RELOC_AVR_LO8_LDI;
}
@@ -1161,7 +1248,7 @@ avr_parse_cons_expression (exp, nbytes)
++input_line_pointer;
else
{
- as_bad (_ ("`)' required"));
+ as_bad (_("`)' required"));
exp_mod_pm = 0;
}
return;
@@ -1186,14 +1273,14 @@ avr_cons_fix_new(frag, where, nbytes, exp)
else if (nbytes == 4)
fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_32);
else
- as_bad (_ ("illegal %srelocation size: %d"), "", nbytes);
+ as_bad (_("illegal %srelocation size: %d"), "", nbytes);
}
else
{
if (nbytes == 2)
fix_new_exp (frag, where, nbytes, exp, false, BFD_RELOC_AVR_16_PM);
else
- as_bad (_ ("illegal %srelocation size: %d"), "`pm' ", nbytes);
+ as_bad (_("illegal %srelocation size: %d"), "`pm' ", nbytes);
exp_mod_pm = 0;
}
}
generated by cgit v1.1 at 2024-11-26 12:22:30 +0000