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backport: re PR target/60991 ([avr] Stack corruption when using 24-bit integers __int24 or __memx pointers in large stack frame) 

gcc/
2014-05-20  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	Backport from mainline r210325
	2014-05-12  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	PR target/60991
	* config/avr/avr.c (avr_out_store_psi): Use correct constant
	to restore Y.

gcc/testsuite/
2014-05-20  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	Backport from mainline r210325
	2014-05-12  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>

	PR target/60991
	* gcc.target/avr/pr60991.c: New testcase.

From-SVN: r210635
This commit is contained in:
Senthil Kumar Selvaraj 2014-05-20 08:37:50 +00:00 committed by Georg-Johann Lay
parent 48d4e34ad2
commit fd941454c7
4 changed files with 39 additions and 1 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2014-05-20 Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com>
Backport from mainline r210325
2014-05-12 Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com>
PR target/60991
* config/avr/avr.c (avr_out_store_psi): Use correct constant
to restore Y.
2014-05-13 Richard Biener <rguenther@suse.de>
Backport from mainline

2
gcc/config/avr/avr.c
View File

@ -3643,7 +3643,7 @@ avr_out_store_psi (rtx insn, rtx *op, int *plen)
"std Y+61,%A1" CR_TAB
"std Y+62,%B1" CR_TAB
"std Y+63,%C1" CR_TAB
"sbiw r28,%o0-60", op, plen, -5);
"sbiw r28,%o0-61", op, plen, -5);
return avr_asm_len ("subi r28,lo8(-%o0)" CR_TAB
"sbci r29,hi8(-%o0)" CR_TAB

8
gcc/testsuite/ChangeLog
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@ -1,3 +1,11 @@
2014-05-20 Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com>
Backport from mainline r210325
2014-05-12 Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com>
PR target/60991
* gcc.target/avr/pr60991.c: New testcase.
2014-05-13 Richard Biener <rguenther@suse.de>
Backport from mainline

21
gcc/testsuite/gcc.target/avr/pr60991.c Normal file
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@ -0,0 +1,21 @@
/* { dg-do run } */
/* { dg-options "-O1" } */
/* This testcase (simplified from the original bug report) exposes
PR60991. The code generated for writing the __int24 value corrupts
the frame pointer if the offset is <= 63 + MAX_LD_OFFSET */
#include <stdlib.h>
int main(void)
{
volatile char junk[62];
junk[0] = 5;
volatile __int24 staticConfig = 0;
if (junk[0] != 5)
abort();
exit(0);
return 0;
}