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SET_STACK macro
Syntax
#define SET_STACK(new_sp) \
do { \
uint32_t sp = (uint32_t)new_sp - SAVE_AREA_OFFSET; \
*(uint32_t*)(sp - BASE_AREA_SP_OFFSET) = (uint32_t)new_sp; \
const uint32_t mask = ~(PS_WOE_MASK | PS_OWB_MASK | PS_CALLINC_MASK); \
uint32_t tmp1 = 0, tmp2 = 0; \
asm volatile ( \
"rsr.ps %1 \n"\
"and %1, %1, %3 \n"\
"wsr.ps %1 \n"\
"rsync \n"\
" \n"\
"rsr.windowbase %1 \n"\
"ssl %1 \n"\
"movi %1, 1 \n"\
"sll %1, %1 \n"\
"wsr.windowstart %1 \n"\
"rsync \n"\
" \n"\
"movi a0, 0\n" \
"mov sp, %0 \n"\
"rsr.ps %1 \n"\
" \n"\
"movi %2, " XTSTR( PS_WOE_MASK ) "\n"\
" \n"\
"or %1, %1, %2 \n"\
"wsr.ps %1 \n"\
"rsync \n"\
: "+r"(sp), "+r"(tmp1), "+r"(tmp2) : "r"(mask)); \
} while (0);