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| author | Georg-Johann Lay <avr@gjlay.de> | 2012-03-07 10:33:19 +0000 |
|---|---|---|
| committer | Georg-Johann Lay <gjl@gcc.gnu.org> | 2012-03-07 10:33:19 +0000 |
| commit | b30e10aba7ee054286393da539d4fc4f534b5b5b (patch) | |
| tree | 7638785fce50e0f49c390449f2a2707afca1e1d6 /gcc | |
| parent | eb3e63ccf77951625062082a487a21d199a83b51 (diff) | |
| download | gcc-b30e10aba7ee054286393da539d4fc4f534b5b5b.zip gcc-b30e10aba7ee054286393da539d4fc4f534b5b5b.tar.gz gcc-b30e10aba7ee054286393da539d4fc4f534b5b5b.tar.bz2 | |
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
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/avr/avr.c | 7 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 143abf6..1ceccc4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +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 diff --git a/gcc/config/avr/avr.c b/gcc/config/avr/avr.c index 7ead6f4..ef49c73 100644 --- a/gcc/config/avr/avr.c +++ b/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 ""; } |