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Update PRU assembler to corect hardware register numbering for DWARF. 

A small rework of the PRU GCC port exposed that CIE data alignment is
erroneously set to 4 for PRU in GAS. In fact PRU stack must be aligned to 1.
Set the macro to -1, to allow output from GCC to be assembled without errors.

Also, while at it, set DWARF2 HW register numbering to follow latest

	* config/tc-pru.c (pru_regname_to_dw2regnum): Return the starting HW
	byte-register number.
	(pru_frame_initial_instructions): Use byte-numbering for FP index.
	* config/tc-pru.h (DWARF2_DEFAULT_RETURN_COLUMN): Use number from
	latest GCC.
	(DWARF2_CIE_DATA_ALIGNMENT): Set to -1.
This commit is contained in:
Dimitar Dimitrov 2018-08-03 10:02:39 +01:00 committed by Nick Clifton
parent dbf8be89ed
commit 2688aab226
4 changed files with 36 additions and 7 deletions
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9
gas/ChangeLog
View File

@ -1,3 +1,12 @@
2018-08-03 Dimitar Dimitrov <dimitar@dinux.eu>
* config/tc-pru.c (pru_regname_to_dw2regnum): Return the starting HW
byte-register number.
(pru_frame_initial_instructions): Use byte-numbering for FP index.
* config/tc-pru.h (DWARF2_DEFAULT_RETURN_COLUMN): Use number from
latest GCC.
(DWARF2_CIE_DATA_ALIGNMENT): Set to -1.
2018-08-03 Jan Beulich <jbeulich@suse.com>
* config/tc-i386.c (Operand_Mem): Define.

22
gas/config/tc-pru.c
View File

@ -1920,14 +1920,28 @@ pru_cons_fix_new (fragS *frag, int where, unsigned int nbytes,
}
/* Implement tc_regname_to_dw2regnum, to convert REGNAME to a DWARF-2
register number. */
register number. Return the starting HW byte-register number. */
int
pru_regname_to_dw2regnum (char *regname)
{
static const unsigned int regstart[RSEL_NUM_ITEMS] =
{
[RSEL_7_0] = 0,
[RSEL_15_8] = 1,
[RSEL_23_16] = 2,
[RSEL_31_24] = 3,
[RSEL_15_0] = 0,
[RSEL_23_8] = 1,
[RSEL_31_16] = 2,
[RSEL_31_0] = 0,
};
struct pru_reg *r = pru_reg_lookup (regname);
if (r == NULL)
if (r == NULL || r->regsel >= RSEL_NUM_ITEMS)
return -1;
return r->index;
return r->index * 4 + regstart[r->regsel];
}
/* Implement tc_cfi_frame_initial_instructions, to initialize the DWARF-2
@ -1935,7 +1949,7 @@ pru_regname_to_dw2regnum (char *regname)
void
pru_frame_initial_instructions (void)
{
const unsigned fp_regno = 4;
const unsigned fp_regno = 4 * 4;
cfi_add_CFA_def_cfa (fp_regno, 0);
}

10
gas/config/tc-pru.h
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@ -138,8 +138,14 @@ extern int pru_validate_fix_sub (struct fix *);
/* We want .cfi_* pseudo-ops for generating unwind info. */
#define TARGET_USE_CFIPOP 1
#define DWARF2_DEFAULT_RETURN_COLUMN 31
#define DWARF2_CIE_DATA_ALIGNMENT (-4)
/* Program Counter register number is not defined by TI documents.
Pick the virtual number used by GCC. */
#define DWARF2_DEFAULT_RETURN_COLUMN 132
/* The stack grows down, and is only byte aligned. */
#define DWARF2_CIE_DATA_ALIGNMENT -1
#define tc_regname_to_dw2regnum pru_regname_to_dw2regnum
extern int pru_regname_to_dw2regnum (char *regname);
#define tc_cfi_frame_initial_instructions pru_frame_initial_instructions

2
ld/ldlex.l
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@ -424,7 +424,7 @@ V_IDENTIFIER [*?.$_a-zA-Z\[\]\-\!\^\\]([*?.$_a-zA-Z0-9\[\]\-\!\^\\]|::)*
/* PR ld/20906. A corrupt input file
can contain bogus strings. */
len = strlen (yylval.name);
if (len > yyleng - 2)
if (len > (bfd_size_type) yyleng - 2)
len = yyleng - 2;
yylval.name[len] = 0;
return NAME;