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Jakub Jelinek <jj@ultra.linux.cz>

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* config/tc-sparc.c (md_longopts): Add --no-undeclared-regs option.
        (sparc_ip): Warn if %g2 or %g3 register is used and not covered
        by .register pseudo-op if -64 and --no-undeclared-regs.
        (s_register, sparc_adjust_symtab): New functions.
        * config/tc-sparc.h (tc_adjust_symtab, sparc_adjust_symtab):
        Declare sparc_adjust_symtab as tc_adjust_symtab.
        * doc/c-sparc.texi: Add description of #ignore special literal
        for .register pseudo-op.
This commit is contained in:
Richard Henderson 1999-07-30 21:39:53 +00:00
parent 587ff49e9a
commit 6d8809aa62
4 changed files with 159 additions and 2 deletions
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11
gas/ChangeLog
View File

@ -1,3 +1,14 @@
1999-07-30 Jakub Jelinek <jj@ultra.linux.cz>
* config/tc-sparc.c (md_longopts): Add --no-undeclared-regs option.
(sparc_ip): Warn if %g2 or %g3 register is used and not covered
by .register pseudo-op if -64 and --no-undeclared-regs.
(s_register, sparc_adjust_symtab): New functions.
* config/tc-sparc.h (tc_adjust_symtab, sparc_adjust_symtab):
Declare sparc_adjust_symtab as tc_adjust_symtab.
* doc/c-sparc.texi: Add description of #ignore special literal
for .register pseudo-op.
1999-07-30 Catherine Moore <clm@cygnus.com>
* config/tc-arm.c (tc_gen_reloc): Record the vtable entry in

139
gas/config/tc-sparc.c
View File

@ -87,6 +87,10 @@ static int warn_on_bump;
architecture, issue a warning. */
static enum sparc_opcode_arch_val warn_after_architecture;
/* Non-zero if as should generate error if an undeclared g[23] register
has been used in -64. */
static int no_undeclared_regs;
/* Non-zero if we are generating PIC code. */
int sparc_pic_code;
@ -97,6 +101,9 @@ extern int target_big_endian;
static int target_little_endian_data;
/* Symbols for global registers on v9. */
static symbolS *globals[8];
/* V9 and 86x have big and little endian data, but instructions are always big
endian. The sparclet has bi-endian support but both data and insns have
the same endianness. Global `target_big_endian' is used for data.
@ -119,6 +126,7 @@ static void s_common PARAMS ((int));
static void s_empty PARAMS ((int));
static void s_uacons PARAMS ((int));
static void s_ncons PARAMS ((int));
static void s_register PARAMS ((int));
const pseudo_typeS md_pseudo_table[] =
{
@ -143,6 +151,7 @@ const pseudo_typeS md_pseudo_table[] =
{"2byte", s_uacons, 2},
{"4byte", s_uacons, 4},
{"8byte", s_uacons, 8},
{"register", s_register, 0},
#endif
{NULL, 0, 0},
};
@ -400,6 +409,10 @@ struct option md_longopts[] = {
{"enforce-aligned-data", no_argument, NULL, OPTION_ENFORCE_ALIGNED_DATA},
#define OPTION_LITTLE_ENDIAN_DATA (OPTION_MD_BASE + 11)
{"little-endian-data", no_argument, NULL, OPTION_LITTLE_ENDIAN_DATA},
#ifdef OBJ_ELF
#define OPTION_NO_UNDECLARED_REGS (OPTION_MD_BASE + 12)
{"no-undeclared-regs", no_argument, NULL, OPTION_NO_UNDECLARED_REGS},
#endif
{NULL, no_argument, NULL, 0}
};
size_t md_longopts_size = sizeof(md_longopts);
@ -549,6 +562,10 @@ md_parse_option (c, arg)
else
sparc_pic_code = 1;
break;
case OPTION_NO_UNDECLARED_REGS:
no_undeclared_regs = 1;
break;
#endif
default:
@ -1865,6 +1882,11 @@ sparc_ip (str, pinsn)
goto error;
}
if ((mask & ~1) == 2 && sparc_arch_size == 64
&& no_undeclared_regs && ! globals [mask])
as_bad (_("detected global register use not "
"covered by .register pseudo-op"));
/* Got the register, now figure out where
it goes in the opcode. */
switch (*args)
@ -3707,6 +3729,123 @@ s_ncons (bytes)
cons (sparc_arch_size == 32 ? 4 : 8);
}
#ifdef OBJ_ELF
/* Handle the SPARC ELF .register pseudo-op. This sets the binding of a
global register.
The syntax is:
.register %g[2367],{#scratch|symbolname|#ignore}
*/
static void
s_register (ignore)
int ignore;
{
char c;
int reg;
int flags;
const char *regname;
if (input_line_pointer[0] != '%'
|| input_line_pointer[1] != 'g'
|| ((input_line_pointer[2] & ~1) != '2'
&& (input_line_pointer[2] & ~1) != '6')
|| input_line_pointer[3] != ',')
as_bad (_("register syntax is .register %%g[2367],{#scratch|symbolname|#ignore}"));
reg = input_line_pointer[2] - '0';
input_line_pointer += 4;
if (*input_line_pointer == '#')
{
++input_line_pointer;
regname = input_line_pointer;
c = get_symbol_end ();
if (strcmp (regname, "scratch") && strcmp (regname, "ignore"))
as_bad (_("register syntax is .register %%g[2367],{#scratch|symbolname|#ignore}"));
if (regname [0] == 'i')
regname = NULL;
else
regname = "";
}
else
{
regname = input_line_pointer;
c = get_symbol_end ();
}
if (sparc_arch_size == 64)
{
if (globals [reg])
{
if ((regname && globals [reg] != (symbolS *)1
&& strcmp (S_GET_NAME (globals [reg]), regname))
|| ((regname != NULL) ^ (globals [reg] != (symbolS *)1)))
as_bad (_("redefinition of global register"));
}
else
{
if (regname == NULL)
globals [reg] = (symbolS *)1;
else
{
if (*regname)
{
if (symbol_find (regname))
as_bad (_("Register symbol %s already defined."),
regname);
}
globals [reg] = symbol_make (regname);
flags = symbol_get_bfdsym (globals [reg])->flags;
if (! *regname)
flags = flags & ~(BSF_GLOBAL|BSF_LOCAL|BSF_WEAK);
if (! (flags & (BSF_GLOBAL|BSF_LOCAL|BSF_WEAK)))
flags |= BSF_GLOBAL;
symbol_get_bfdsym (globals [reg])->flags = flags;
S_SET_VALUE (globals [reg], (valueT)reg);
S_SET_ALIGN (globals [reg], reg);
S_SET_SIZE (globals [reg], 0);
/* Although we actually want undefined_section here,
we have to use absolute_section, because otherwise
generic as code will make it a COM section.
We fix this up in sparc_adjust_symtab. */
S_SET_SEGMENT (globals [reg], absolute_section);
S_SET_OTHER (globals [reg], 0);
elf_symbol (symbol_get_bfdsym (globals [reg]))
->internal_elf_sym.st_info =
ELF_ST_INFO(STB_GLOBAL, STT_REGISTER);
elf_symbol (symbol_get_bfdsym (globals [reg]))
->internal_elf_sym.st_shndx = SHN_UNDEF;
}
}
}
*input_line_pointer = c;
demand_empty_rest_of_line ();
}
/* Adjust the symbol table. We set undefined sections for STT_REGISTER
symbols which need it. */
void
sparc_adjust_symtab ()
{
symbolS *sym;
for (sym = symbol_rootP; sym != NULL; sym = symbol_next (sym))
{
if (ELF_ST_TYPE (elf_symbol (symbol_get_bfdsym (sym))
->internal_elf_sym.st_info) != STT_REGISTER)
continue;
if (ELF_ST_TYPE (elf_symbol (symbol_get_bfdsym (sym))
->internal_elf_sym.st_shndx != SHN_UNDEF))
continue;
S_SET_SEGMENT (sym, undefined_section);
}
}
#endif
/* If the --enforce-aligned-data option is used, we require .word,
et. al., to be aligned correctly. We do it by setting up an
rs_align_code frag, and checking in HANDLE_ALIGN to make sure that

4
gas/config/tc-sparc.h
View File

@ -139,6 +139,10 @@ extern int elf32_sparc_force_relocation PARAMS ((struct fix *));
&& (S_GET_SEGMENT ((FIX)->fx_subsy) \
== S_GET_SEGMENT ((FIX)->fx_addsy))) \
|| S_IS_LOCAL ((FIX)->fx_addsy)))
/* Finish up the entire symtab. */
#define tc_adjust_symtab() sparc_adjust_symtab ()
extern void sparc_adjust_symtab PARAMS ((void));
#endif
#ifdef OBJ_AOUT

7
gas/doc/c-sparc.texi
View File

@ -160,8 +160,11 @@ line is also ignored.
@item .register
This directive declares use of a global application or system register.
It must be followed by a register name %g2, %g3, %g6 or %g7, comma and
the symbol name for that register or @code{#scratch} if it is a scratch
register.
the symbol name for that register. If symbol name is @code{#scratch},
it is a scratch register, if it is @code{#ignore}, it just surpresses any
errors about using undeclared global register, but does not emit any
information about it into the object file. This can be useful e.g. if you
save the register before use and restore it after.
@cindex @code{reserve} directive, SPARC
@item .reserve