61 lines
1.7 KiB
Diff
61 lines
1.7 KiB
Diff
From b3e28228b0f5af506f38d1a211ed0794dd66fafe Mon Sep 17 00:00:00 2001
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From: Andreas Schwab <schwab@suse.de>
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Date: Thu, 19 Jul 2018 18:38:31 +0200
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Subject: [PATCH] Add support for RISC-V
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---
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platform/switch_riscv_unix.h | 32 ++++++++++++++++++++++++++++++++
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slp_platformselect.h | 2 ++
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2 files changed, 34 insertions(+)
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create mode 100644 platform/switch_riscv_unix.h
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diff --git a/platform/switch_riscv_unix.h b/platform/switch_riscv_unix.h
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new file mode 100644
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index 0000000..5b5ea98
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--- /dev/null
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+++ b/platform/switch_riscv_unix.h
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@@ -0,0 +1,32 @@
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+#define STACK_REFPLUS 1
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+
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+#ifdef SLP_EVAL
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+#define STACK_MAGIC 0
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+
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+#define REGS_TO_SAVE "s0", "s1", "s2", "s3", "s4", "s5", \
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+ "s6", "s7", "s8", "s9", "s10", "s11", "fs0", "fs1", \
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+ "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", "fs8", "fs9", \
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+ "fs10", "fs11"
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+
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+static int
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+slp_switch(void)
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+{
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+ register int ret;
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+ register long *stackref, stsizediff;
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+ __asm__ volatile ("" : : : REGS_TO_SAVE);
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+ __asm__ volatile ("mv %0, sp" : "=r" (stackref) : );
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+ {
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+ SLP_SAVE_STATE(stackref, stsizediff);
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+ __asm__ volatile (
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+ "add sp, sp, %0\n\t"
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+ : /* no outputs */
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+ : "r" (stsizediff)
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+ );
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+ SLP_RESTORE_STATE();
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+ }
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+ __asm__ volatile ("" : : : REGS_TO_SAVE);
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+ __asm__ volatile ("mv %0, zero" : "=r" (ret) : );
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+ return ret;
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+}
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+
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+#endif
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diff --git a/slp_platformselect.h b/slp_platformselect.h
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index e6cdc9f..b52c287 100644
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--- a/slp_platformselect.h
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+++ b/slp_platformselect.h
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@@ -49,4 +49,6 @@
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#include "platform/switch_m68k_gcc.h" /* gcc on m68k */
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#elif defined(__GNUC__) && defined(__csky__)
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#include "platform/switch_csky_gcc.h" /* gcc on csky */
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+#elif defined(__GNUC__) && defined(__riscv)
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+#include "platform/switch_riscv_unix.h" /* gcc on RISC-V */
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#endif
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