diff mbox series

[v4,03/14] riscv: add initjmp()

Message ID 20250318104659.1114340-4-jerome.forissier@linaro.org
State New
Headers show
Series Uthreads | expand

Commit Message

Jerome Forissier March 18, 2025, 10:46 a.m. UTC 
Implement initjmp() for RISC-V.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
---
 arch/Kconfig            |  1 +
 arch/riscv/lib/setjmp.S | 11 +++++++++++
 2 files changed, 12 insertions(+)
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Patch

diff --git a/arch/Kconfig b/arch/Kconfig
index 7a3141e92b3..aa60c5ff03c 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -153,6 +153,7 @@  config RISCV
 	bool "RISC-V architecture"
 	select CREATE_ARCH_SYMLINK
 	select HAVE_SETJMP
+	select HAVE_INITJMP
 	select SUPPORT_ACPI
 	select SUPPORT_LITTLE_ENDIAN
 	select SUPPORT_OF_CONTROL
diff --git a/arch/riscv/lib/setjmp.S b/arch/riscv/lib/setjmp.S
index 99d6195827e..9e1f3d5749b 100644
--- a/arch/riscv/lib/setjmp.S
+++ b/arch/riscv/lib/setjmp.S
@@ -59,3 +59,14 @@  ENTRY(longjmp)
 	ret
 ENDPROC(longjmp)
 .popsection
+
+.pushsection .text.initjmp, "ax"
+ENTRY(initjmp)
+	/* a1: entry point address, a2: stack base, a3: stack size */
+	add a2, a2, a3
+	STORE_IDX(a1, 12)
+	STORE_IDX(a2, 13)
+	li  a0, 0
+	ret
+ENDPROC(initjmp)
+.popsection