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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Cc: Jules Maselbas <jmaselbas@kalray.eu>,
	Stafford Horne <shorne@gmail.com>,
	Ahmad Fatoum <a.fatoum@pengutronix.de>,
	sha@pengutronix.de
Subject: [PATCH v2 04/11] ARM: asm: setjmp: implement coroutine dependency initjmp()
Date: Mon,  1 Mar 2021 12:00:59 +0100	[thread overview]
Message-ID: <20210301110106.3764-5-a.fatoum@pengutronix.de> (raw)
In-Reply-To: <20210301110106.3764-1-a.fatoum@pengutronix.de>

Implement initjmp() for use with the coroutine implementation.

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:[~2021-03-01 11:02 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-01 11:00 [PATCH v2 00/11] common: introduce bthreads, co-operative Ahmad Fatoum
2021-03-01 11:00 ` [PATCH v2 01/11] console: unconditionally run poller_call in ctrlc() Ahmad Fatoum
2021-03-03 10:20   ` [PATCH] fixup! common: introduce bthreads, co-operative barebox threads Ahmad Fatoum
2021-03-04  8:49     ` Sascha Hauer
2021-03-04  9:17       ` Ahmad Fatoum
2021-03-01 11:00 ` [PATCH v2 02/11] " Ahmad Fatoum
2021-03-01 12:42   ` Peter Korsgaard
2021-03-02  8:56     ` Ahmad Fatoum
2021-03-02  8:56   ` [PATCH] fixup! " Ahmad Fatoum
2021-03-01 11:00 ` [PATCH v2 03/11] ARM: asm: setjmp: annotate setjmp/longjmp for GCC Ahmad Fatoum
2021-03-01 11:00 ` Ahmad Fatoum [this message]
2021-03-01 11:01 ` [PATCH v2 05/11] sandbox: asm: implement setjmp/longjmp/initjmp Ahmad Fatoum
2021-03-01 11:01 ` [PATCH v2 06/11] riscv: Add asm/asm.h Ahmad Fatoum
2021-03-01 11:01 ` [PATCH v2 07/11] riscv: Add asm/linkage.h Ahmad Fatoum
2021-03-01 11:01 ` [PATCH v2 08/11] riscv: Implement setjmp/longjmp/initjmp Ahmad Fatoum
2021-03-01 11:01 ` [PATCH v2 09/11] mips: Add linkage.h Ahmad Fatoum
2021-03-01 11:01 ` [PATCH v2 10/11] mips: Implement setjmp/longjmp/initjmp Ahmad Fatoum
2021-03-02 22:19   ` Peter Mamonov
2021-03-04  8:38     ` Sascha Hauer
2021-03-07 12:00       ` Peter Mamonov
2021-03-10  8:17         ` Ahmad Fatoum
2021-03-14 12:40           ` Ahmad Fatoum
2021-03-01 11:01 ` [PATCH v2 11/11] powerpc: Implement initjmp/setjmp/longjmp Ahmad Fatoum
2021-03-03 12:15 ` [PATCH v2 00/11] common: introduce bthreads, co-operative Stafford Horne
2021-03-03 13:35   ` Stafford Horne
2021-03-03 13:58   ` Ahmad Fatoum
2021-03-03 15:12   ` Sascha Hauer

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