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platform: riscv64: fix building with -fno-omit-frame-pointer #404

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platform: riscv64: fix building with -fno-omit-frame-pointer #404

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6 changes: 5 additions & 1 deletion src/greenlet/platform/switch_riscv_unix.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,28 +3,32 @@
#ifdef SLP_EVAL
#define STACK_MAGIC 0

#define REGS_TO_SAVE "s0", "s1", "s2", "s3", "s4", "s5", \
#define REGS_TO_SAVE "s1", "s2", "s3", "s4", "s5", \
"s6", "s7", "s8", "s9", "s10", "s11", "fs0", "fs1", \
"fs2", "fs3", "fs4", "fs5", "fs6", "fs7", "fs8", "fs9", \
"fs10", "fs11"

static int
slp_switch(void)
{
long fp;
int ret;
long *stackref, stsizediff;
__asm__ volatile ("" : : : REGS_TO_SAVE);
__asm__ volatile ("mv %0, fp" : "=r" (fp) : );
__asm__ volatile ("mv %0, sp" : "=r" (stackref) : );
{
SLP_SAVE_STATE(stackref, stsizediff);
__asm__ volatile (
"add sp, sp, %0\n\t"
"add fp, fp, %0\n\t"
: /* no outputs */
: "r" (stsizediff)
);
SLP_RESTORE_STATE();
}
__asm__ volatile ("" : : : REGS_TO_SAVE);
__asm__ volatile ("ld fp, %0" : : "m" (fp));
__asm__ volatile ("mv %0, zero" : "=r" (ret) : );
return ret;
}
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