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Merged
merged 1 commit into from
Apr 10, 2013
Merged

Add support for aarch64 #27

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45 changes: 45 additions & 0 deletions platform/switch_aarch64_gcc.h
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Original file line number Diff line number Diff line change
@@ -0,0 +1,45 @@
/*
* this is the internal transfer function.
*
* HISTORY
* 08-Apr-13 File creation. Michael Matz
*
* NOTES
*
* Simply save all callee saved registers
*
*/

#define STACK_REFPLUS 1

#ifdef SLP_EVAL
#define STACK_MAGIC 0
#define REGS_TO_SAVE "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", \
"r27", "r28", "r30" /* aka lr */, \
"v8", "v9", "v10", "v11", \
"v12", "v13", "v14", "v15"

static int
slp_switch(void)
{
void *fp;
register int *stackref, stsizediff;
__asm__ volatile ("" : : : REGS_TO_SAVE);
__asm__ volatile ("str x29, %0" : "=m"(fp) : :);
__asm__ ("mov %0, sp" : "=r" (stackref));
{
SLP_SAVE_STATE(stackref, stsizediff);
__asm__ volatile (
"add sp,sp,%0\n"
"add x29,x29,%0\n"
:
: "r" (stsizediff)
);
SLP_RESTORE_STATE();
}
__asm__ volatile ("ldr x29, %0" : : "m" (fp) :);
__asm__ volatile ("" : : : REGS_TO_SAVE);
return 0;
}

#endif
2 changes: 2 additions & 0 deletions slp_platformselect.h
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Original file line number Diff line number Diff line change
Expand Up @@ -34,4 +34,6 @@
#include "platform/switch_arm32_gcc.h" /* gcc using arm32 */
#elif defined(__GNUC__) && defined(__mips__) && defined(__linux__)
#include "platform/switch_mips_unix.h" /* Linux/MIPS */
#elif defined(__GNUC__) && defined(__aarch64__)
#include "platform/switch_aarch64_gcc.h" /* Aarch64 ABI */
#endif