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Commit b30e10ab by Georg-Johann Lay Committed by Georg-Johann Lay
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re PR target/52461 ([avr] XMEGA+EBI: RAMPZ clobbered while reading from flash) 

libgcc/
	PR target/52461
	PR target/52508
	* config/avr/lib1funcs.S (__do_copy_data): Clear RAMPZ after usage
	if RAMPZ affects reading from RAM.
	(__tablejump_elpm__): Ditto.
	(.xload): Ditto.
	(__movmemx_hi): Ditto.
	(__do_global_ctors): Right condition for RAMPZ usage is "have ELPM".
	(__do_global_dtors): Ditto.
	(__xload_1, __xload_2, __xload_3, __xload_4): Ditto.
	(__movmemx_hi): Ditto.
gcc/	
	PR target/52461
	* gcc/config/avr/avr.c (avr_out_lpm): Clear RAMPZ after usage
	if RAMPZ affects reading from RAM.

From-SVN: r185030
parent eb3e63cc
Showing with 62 additions and 19 deletions
gcc/ChangeLog
2012-03-07 Georg-Johann Lay <avr@gjlay.de>
PR target/52461
* gcc/config/avr/avr.c (avr_out_lpm): Clear RAMPZ after usage
if RAMPZ affects reading from RAM.
2012-03-07 Richard Guenther <rguenther@suse.de>
PR pch/52518
......
gcc/config/avr/avr.c
......@@ -2762,7 +2762,14 @@ avr_out_lpm (rtx insn, rtx *op, int *plen)
break; /* POST_INC */
} /* switch CODE (addr) */
if (xop[4] == xstring_e && AVR_HAVE_RAMPD)
{
/* Reset RAMPZ to 0 so that EBI devices don't read garbage from RAM */
avr_asm_len ("out __RAMPZ__,__zero_reg__", xop, plen, 1);
}
return "";
}
......
libgcc/ChangeLog
2012-03-07 Georg-Johann Lay <avr@gjlay.de>
PR target/52461
PR target/52508
* config/avr/lib1funcs.S (__do_copy_data): Clear RAMPZ after usage
if RAMPZ affects reading from RAM.
(__tablejump_elpm__): Ditto.
(.xload): Ditto.
(__movmemx_hi): Ditto.
(__do_global_ctors): Right condition for RAMPZ usage is "have ELPM".
(__do_global_dtors): Ditto.
(__xload_1, __xload_2, __xload_3, __xload_4): Ditto.
(__movmemx_hi): Ditto.
2012-03-05 Richard Henderson <rth@redhat.com>
* longlong.h [ARM] (umul_ppmm): Use umull for arm3m and later.
......
libgcc/config/avr/lib1funcs.S
......@@ -1893,6 +1893,10 @@ DEFUN __do_copy_data
cpc r27, r17
brne .L__do_copy_data_loop
#endif /* !defined(__AVR_HAVE_ELPMX__) && !defined(__AVR_HAVE_ELPM__) */
#if defined (__AVR_HAVE_ELPM__) && defined (__AVR_HAVE_RAMPD__)
;; Reset RAMPZ to 0 so that EBI devices don't read garbage from RAM
out __RAMPZ__, __zero_reg__
#endif /* ELPM && RAMPD */
ENDF __do_copy_data
#endif /* L_copy_data */
......@@ -1920,7 +1924,7 @@ ENDF __do_clear_bss
#ifdef L_ctors
.section .init6,"ax",@progbits
DEFUN __do_global_ctors
#if defined(__AVR_HAVE_RAMPZ__)
#if defined(__AVR_HAVE_ELPM__)
ldi r17, hi8(__ctors_start)
ldi r28, lo8(__ctors_end)
ldi r29, hi8(__ctors_end)
......@@ -1953,14 +1957,14 @@ DEFUN __do_global_ctors
cpi r28, lo8(__ctors_start)
cpc r29, r17
brne .L__do_global_ctors_loop
#endif /* defined(__AVR_HAVE_RAMPZ__) */
#endif /* defined(__AVR_HAVE_ELPM__) */
ENDF __do_global_ctors
#endif /* L_ctors */
#ifdef L_dtors
.section .fini6,"ax",@progbits
DEFUN __do_global_dtors
#if defined(__AVR_HAVE_RAMPZ__)
#if defined(__AVR_HAVE_ELPM__)
ldi r17, hi8(__dtors_end)
ldi r28, lo8(__dtors_start)
ldi r29, hi8(__dtors_start)
......@@ -1993,7 +1997,7 @@ DEFUN __do_global_dtors
cpi r28, lo8(__dtors_end)
cpc r29, r17
brne .L__do_global_dtors_loop
#endif /* defined(__AVR_HAVE_RAMPZ__) */
#endif /* defined(__AVR_HAVE_ELPM__) */
ENDF __do_global_dtors
#endif /* L_dtors */
......@@ -2001,18 +2005,21 @@ ENDF __do_global_dtors
#ifdef L_tablejump_elpm
DEFUN __tablejump_elpm__
#if defined (__AVR_HAVE_ELPM__)
#if defined (__AVR_HAVE_LPMX__)
#if defined (__AVR_HAVE_ELPMX__)
elpm __tmp_reg__, Z+
elpm r31, Z
mov r30, __tmp_reg__
#if defined (__AVR_HAVE_RAMPD__)
;; Reset RAMPZ to 0 so that EBI devices don't read garbage from RAM
out __RAMPZ__, __zero_reg__
#endif /* RAMPD */
#if defined (__AVR_HAVE_EIJMP_EICALL__)
eijmp
#else
ijmp
#endif
#else
#elif defined (__AVR_HAVE_ELPM__)
elpm
adiw r30, 1
push r0
......@@ -2024,7 +2031,6 @@ DEFUN __tablejump_elpm__
#endif
ret
#endif
#endif /* defined (__AVR_HAVE_ELPM__) */
ENDF __tablejump_elpm__
#endif /* defined (L_tablejump_elpm) */
......@@ -2114,11 +2120,17 @@ ENDF __load_4
adiw r30, 1
.endif
#endif
#if defined (__AVR_HAVE_ELPM__) && defined (__AVR_HAVE_RAMPD__)
.if \dest == D0+\n-1
;; Reset RAMPZ to 0 so that EBI devices don't read garbage from RAM
out __RAMPZ__, __zero_reg__
.endif
#endif
.endm ; .xload
#if defined (L_xload_1)
DEFUN __xload_1
#if defined (__AVR_HAVE_LPMX__) && !defined (__AVR_HAVE_RAMPZ__)
#if defined (__AVR_HAVE_LPMX__) && !defined (__AVR_HAVE_ELPM__)
ld D0, Z
sbrs HHI8, 7
lpm D0, Z
......@@ -2126,14 +2138,14 @@ DEFUN __xload_1
#else
sbrc HHI8, 7
rjmp 1f
#if defined (__AVR_HAVE_RAMPZ__)
#if defined (__AVR_HAVE_ELPM__)
out __RAMPZ__, HHI8
#endif /* __AVR_HAVE_RAMPZ__ */
#endif /* __AVR_HAVE_ELPM__ */
.xload D0, 1
ret
1: ld D0, Z
ret
#endif /* LPMx && ! RAMPZ */
#endif /* LPMx && ! ELPM */
ENDF __xload_1
#endif /* L_xload_1 */
......@@ -2141,9 +2153,9 @@ ENDF __xload_1
DEFUN __xload_2
sbrc HHI8, 7
rjmp 1f
#if defined (__AVR_HAVE_RAMPZ__)
#if defined (__AVR_HAVE_ELPM__)
out __RAMPZ__, HHI8
#endif /* __AVR_HAVE_RAMPZ__ */
#endif /* __AVR_HAVE_ELPM__ */
.xload D0, 2
.xload D1, 2
ret
......@@ -2157,9 +2169,9 @@ ENDF __xload_2
DEFUN __xload_3
sbrc HHI8, 7
rjmp 1f
#if defined (__AVR_HAVE_RAMPZ__)
#if defined (__AVR_HAVE_ELPM__)
out __RAMPZ__, HHI8
#endif /* __AVR_HAVE_RAMPZ__ */
#endif /* __AVR_HAVE_ELPM__ */
.xload D0, 3
.xload D1, 3
.xload D2, 3
......@@ -2175,9 +2187,9 @@ ENDF __xload_3
DEFUN __xload_4
sbrc HHI8, 7
rjmp 1f
#if defined (__AVR_HAVE_RAMPZ__)
#if defined (__AVR_HAVE_ELPM__)
out __RAMPZ__, HHI8
#endif /* __AVR_HAVE_RAMPZ__ */
#endif /* __AVR_HAVE_ELPM__ */
.xload D0, 4
.xload D1, 4
.xload D2, 4
......@@ -2219,7 +2231,7 @@ DEFUN __movmemx_hi
;; Read from Flash
#if defined (__AVR_HAVE_RAMPZ__)
#if defined (__AVR_HAVE_ELPM__)
out __RAMPZ__, HHI8
#endif
......@@ -2243,6 +2255,10 @@ DEFUN __movmemx_hi
st X+, r0
sbiw LOOP, 1
brne 0b
#if defined (__AVR_HAVE_ELPM__) && defined (__AVR_HAVE_RAMPD__)
;; Reset RAMPZ to 0 so that EBI devices don't read garbage from RAM
out __RAMPZ__, __zero_reg__
#endif /* ELPM && RAMPD */
ret
;; Read from RAM
......
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