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xtensa_coproc.S: Adjust the save reserved for local variables when

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restoring/saving coprocessor state.

These function don't use call8 or call12 and thus need to create just 16
bytes for the base save area, however they do use one variable so we
need a space for that.  The `entry` instruction works in unit of 8 bytes
so we add whole 8 bytes for one variable.

Signed-off-by: Abdelatif Guettouche <abdelatif.guettouche@espressif.com>
This commit is contained in:
Abdelatif Guettouche
2022-03-18 14:54:58 +01:00
committed by Petro Karashchenko
parent 9ae826e925
commit ce8fae2842
1 changed files with 14 additions and 4 deletions
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arch/xtensa/src/common/xtensa_coproc.S
+14 -4
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@@ -251,7 +251,12 @@ xtensa_coproc_savestate:
* a13-a15. So a13-a15 may need to be preserved.
*/
ENTRY(32 /*16*/) /* REVISIT: Why 32? */
/* Allocate the stack frame. This function needs to allocate the usual 16
* byte for the base save area + space for one variable.
* NOTE: entry works in multiples of 8 bytes.
*/
ENTRY(24)
s32i a0, sp, LOCAL_OFFSET(1) /* Save return address */
/* Call _xtensa_coproc_savestate() with A2=address of co-processor
@@ -263,7 +268,7 @@ xtensa_coproc_savestate:
/* Restore a0 and return */
l32i a0, sp, LOCAL_OFFSET(1) /* Recover return address */
RET(32 /*16*/) /* REVISIT: Why 32? */
RET(24)
#endif
@@ -450,7 +455,12 @@ xtensa_coproc_restorestate:
* a13-a15. So a13-a15 may need to be preserved.
*/
ENTRY(32 /*16*/) /* REVISIT: Why 32? */
/* Allocate the stack frame. This function needs to allocate the usual 16
* byte for the base save area + space for one variable.
* NOTE: entry works in multiples of 8 bytes.
*/
ENTRY(24)
s32i a0, sp, LOCAL_OFFSET(1) /* Save return address */
/* Call _xtensa_coproc_restorestate() with A2=address of co-processor
@@ -462,7 +472,7 @@ xtensa_coproc_restorestate:
/* Restore a0 and return */
l32i a0, sp, LOCAL_OFFSET(1) /* Recover return address */
RET(32 /*16*/) /* REVISIT: Why 32? */
RET(24)
#endif