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* config/tc-msp430.c (OPTION_MOVE_DATA): Define.

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(move_data): New variable.
	(md_parse_option): Parse -md.
	(msp430_section): New function.  Catch references to the .bss or
	.data sections and generate a special symbol for use by the libcrt
	library.
	(md_pseudo_table): Intercept .section directives.
	(md_longopt): Add -md
	(md_show_usage): Likewise.
	(msp430_operands): Generate a warning message if a NOP is inserted
	into the instruction stream.
	* doc/c-msp430.texi (node MSP430 Options): Document -md option.
This commit is contained in:
Nick Clifton 2013-09-18 07:50:34 +00:00
parent ee47b2f89d
commit ab90591541
3 changed files with 59 additions and 1 deletions
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17
gas/ChangeLog
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@ -1,7 +1,22 @@
2013-09-18 Nick Clifton <nickc@redhat.com>
* config/tc-msp430.c (OPTION_MOVE_DATA): Define.
(move_data): New variable.
(md_parse_option): Parse -md.
(msp430_section): New function. Catch references to the .bss or
.data sections and generate a special symbol for use by the libcrt
library.
(md_pseudo_table): Intercept .section directives.
(md_longopt): Add -md
(md_show_usage): Likewise.
(msp430_operands): Generate a warning message if a NOP is inserted
into the instruction stream.
* doc/c-msp430.texi (node MSP430 Options): Document -md option.
2013-09-17 Doug Gilmore <Doug.Gilmore@imgtec.com>
* config/tc-mips.c (mips_elf_final_processing): Set
EF_MIPS_FP64 for -mgp32 -mfp64, removing old FIXME.
EF_MIPS_FP64 for -mgp32 -mfp64, removing old FIXME.
2013-09-16 Will Newton <will.newton@linaro.org>

39
gas/config/tc-msp430.c
View file

@ -1123,6 +1123,8 @@ static bfd_boolean large_model = FALSE;
#define OPTION_NO_INTR_NOPS 'N'
static bfd_boolean gen_interrupt_nops = TRUE;
#define OPTION_MCPU 'c'
#define OPTION_MOVE_DATA 'd'
static bfd_boolean move_data = FALSE;
static void
msp430_set_arch (int option)
@ -1210,16 +1212,44 @@ md_parse_option (int c, char * arg)
case OPTION_NO_INTR_NOPS:
gen_interrupt_nops = FALSE;
return 1;
case OPTION_MOVE_DATA:
move_data = TRUE;
return 1;
}
return 0;
}
static void
msp430_section (int arg)
{
char * saved_ilp = input_line_pointer;
char * name = obj_elf_section_name ();
if (strncmp (name, ".bss", 4) == 0
|| strncmp (name, ".gnu.linkonce.b.", 16) == 0)
(void) symbol_find_or_make ("__crt0_init_bss");
if (move_data
&& (strncmp (name, ".data", 5) == 0
|| strncmp (name, ".gnu.linkonce.d.", 16) == 0))
(void) symbol_find_or_make ("__crt0_movedata");
input_line_pointer = saved_ilp;
obj_elf_section (arg);
}
const pseudo_typeS md_pseudo_table[] =
{
{"arch", msp430_set_arch, OPTION_MMCU},
{"cpu", msp430_set_arch, OPTION_MCPU},
{"profiler", msp430_profiler, 0},
{"section", msp430_section, 0},
{"section.s", msp430_section, 0},
{"sect", msp430_section, 0},
{"sect.s", msp430_section, 0},
{"pushsection", msp430_section, 1},
{NULL, NULL, 0}
};
@ -1233,6 +1263,7 @@ struct option md_longopts[] =
{"mQ", no_argument, NULL, OPTION_RELAX},
{"ml", no_argument, NULL, OPTION_LARGE},
{"mN", no_argument, NULL, OPTION_NO_INTR_NOPS},
{"md", no_argument, NULL, OPTION_MOVE_DATA},
{NULL, no_argument, NULL, 0}
};
@ -1252,6 +1283,8 @@ md_show_usage (FILE * stream)
_(" -ml - enable large code model\n"));
fprintf (stream,
_(" -mN - disable generation of NOP after changing interrupts\n"));
fprintf (stream,
_(" -md - Force copying of data from ROM to RAM at startup\n"));
show_mcu_list (stream);
}
@ -2201,6 +2234,8 @@ msp430_operands (struct msp430_opcode_s * opcode, char * line)
See 1.3.4.1 of the MSP430x5xx User Guide. */
insn_length += 2;
frag = frag_more (2);
as_warn (_("a NOP instruction has been inserted after %s"),
opcode->name);
bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag);
}
dwarf2_emit_insn (insn_length);
@ -2285,6 +2320,8 @@ msp430_operands (struct msp430_opcode_s * opcode, char * line)
insn_length += 2;
frag = frag_more (2);
bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag);
as_warn (_("a NOP instruction has been inserted after %s"),
opcode->name);
}
dwarf2_emit_insn (insn_length);
@ -3041,6 +3078,8 @@ msp430_operands (struct msp430_opcode_s * opcode, char * line)
insn_length += 2;
frag = frag_more (2);
bfd_putl16 ((bfd_vma) 0x4303 /* NOP */, frag);
as_warn (_("a NOP instruction has been inserted after %s"),
opcode->name);
}
dwarf2_emit_insn (insn_length);

4
gas/doc/c-msp430.texi
View file

@ -57,6 +57,10 @@ instruction happens automatically, but this command line option
disables this behaviour. It is then up to the programmer to ensure
that interrupts are enabled and disabled correctly.
@item -md
mark the object file as one that requires data to copied from ROM to
RAM at execution startup. Disabled by default.
@end table
@node MSP430 Syntax