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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Peter Mamonov <pmamonov@gmail.com>,
	Peter Korsgaard <peter@korsgaard.com>,
	Sascha Hauer <sha@pengutronix.de>,
	Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH v3 03/16] ARM: asm: setjmp: implement coroutine dependency initjmp()
Date: Wed, 10 Mar 2021 09:47:47 +0100	[thread overview]
Message-ID: <20210310084800.3584-4-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20210310084800.3584-1-a.fatoum@pengutronix.de>

Implement initjmp() for use with the incoming bthread support.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 arch/arm/Kconfig              | 1 +
 arch/arm/include/asm/setjmp.h | 2 ++
 arch/arm/lib32/setjmp.S       | 8 ++++++++
 arch/arm/lib64/setjmp.S       | 9 +++++++++
 4 files changed, 20 insertions(+)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index ab0bf030131c..cdb934136e34 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -5,6 +5,7 @@ config ARM
 	select HAVE_CONFIGURABLE_TEXT_BASE if !RELOCATABLE
 	select HAVE_IMAGE_COMPRESSION
 	select HAVE_ARCH_KASAN
+	select HAS_ARCH_SJLJ
 	select ARM_OPTIMZED_STRING_FUNCTIONS if KASAN
 	default y
 
diff --git a/arch/arm/include/asm/setjmp.h b/arch/arm/include/asm/setjmp.h
index 538d9cd50651..4877e4312411 100644
--- a/arch/arm/include/asm/setjmp.h
+++ b/arch/arm/include/asm/setjmp.h
@@ -26,4 +26,6 @@ typedef struct jmp_buf_data jmp_buf[1];
 int setjmp(jmp_buf jmp) __attribute__((returns_twice));
 void longjmp(jmp_buf jmp, int ret) __attribute__((noreturn));
 
+int initjmp(jmp_buf jmp, void __noreturn (*func)(void), void *stack_top);
+
 #endif /* _SETJMP_H_ */
diff --git a/arch/arm/lib32/setjmp.S b/arch/arm/lib32/setjmp.S
index f0606a7f6659..626d915da183 100644
--- a/arch/arm/lib32/setjmp.S
+++ b/arch/arm/lib32/setjmp.S
@@ -33,4 +33,12 @@ ENTRY(longjmp)
 1:
 	bx   lr
 ENDPROC(longjmp)
+
+.pushsection .text.initjmp, "ax"
+ENTRY(initjmp)
+	str  a3, [a1, #32] /* stack pointer */
+	str  a2, [a1, #36] /* return address */
+	mov  a1, #0
+	bx   lr
+ENDPROC(initjmp)
 .popsection
diff --git a/arch/arm/lib64/setjmp.S b/arch/arm/lib64/setjmp.S
index 0910e2f5a6c3..80be8cb0f201 100644
--- a/arch/arm/lib64/setjmp.S
+++ b/arch/arm/lib64/setjmp.S
@@ -36,3 +36,12 @@ ENTRY(longjmp)
 	ret
 ENDPROC(longjmp)
 .popsection
+
+.pushsection .text.initjmp, "ax"
+ENTRY(initjmp)
+	str  x2, [x0, #96] /* stack pointer */
+	str  x1, [x0, #88] /* return address */
+	mov  x0, #0
+	ret
+ENDPROC(initjmp)
+.popsection
-- 
2.29.2


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  parent reply	other threads:[~2021-03-10  8:51 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-10  8:47 [PATCH v3 00/16] common: introduce bthreads, co-operative Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 01/16] common: introduce HAS_ARCH_SJLJ Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 02/16] ARM: asm: setjmp: annotate setjmp/longjmp for GCC Ahmad Fatoum
2021-03-10  8:47 ` Ahmad Fatoum [this message]
2021-03-10  8:47 ` [PATCH v3 04/16] sandbox: asm: implement setjmp/longjmp/initjmp Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 05/16] riscv: Add asm/asm.h Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 06/16] riscv: Add asm/linkage.h Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 07/16] riscv: Implement setjmp/longjmp/initjmp for RV32I Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 08/16] mips: Add linkage.h Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 09/16] mips: Implement setjmp/longjmp/initjmp for 32BIT Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 10/16] powerpc: Implement initjmp/setjmp/longjmp Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 11/16] x86: implement setjmp/longjmp/initjmp Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 12/16] common: poller: replace explicit calls to poller_call() with resched() Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 13/16] console: unconditionally run resched() in ctrlc() Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 14/16] common: introduce bthreads, co-operative barebox threads Ahmad Fatoum
2021-03-10  8:47 ` [PATCH v3 15/16] commands: add new bthread test command Ahmad Fatoum
2021-03-10  8:48 ` [PATCH v3 16/16] RFC: led: migrate from poller to bthread Ahmad Fatoum
2021-03-15  8:34 ` [PATCH v3 00/16] common: introduce bthreads, co-operative Sascha Hauer

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