From: Ahmad Fatoum <a.fatoum@pengutronix.de> To: barebox@lists.infradead.org Cc: Ahmad Fatoum <a.fatoum@pengutronix.de> Subject: [PATCH 5/9] ARM64: <asm/barebox-arm-head.h>: mark prologue location Date: Mon, 8 Nov 2021 08:52:05 +0100 [thread overview] Message-ID: <20211108075209.2366770-5-a.fatoum@pengutronix.de> (raw) In-Reply-To: <20211108075209.2366770-1-a.fatoum@pengutronix.de> Unlike with ARM32, barebox prologue on ARM64 starts with the function prologue, because of the absence of the naked attribute. The code is written with that in mind (6 branches instead of 8 to account for the two instructions inserted by the compiler), but it's still suprising. Add a hint about that in the code. Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> --- arch/arm/include/asm/barebox-arm-head.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/include/asm/barebox-arm-head.h b/arch/arm/include/asm/barebox-arm-head.h index 8409a77d2e7c..187d12c9fc8d 100644 --- a/arch/arm/include/asm/barebox-arm-head.h +++ b/arch/arm/include/asm/barebox-arm-head.h @@ -44,6 +44,8 @@ static inline void __barebox_arm_head(void) "1: b 1b\n" #endif #else + /* two instruction long function prologue */ + /* only use if stack is initialized! */ "b 2f\n" "nop\n" "nop\n" -- 2.30.2 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2021-11-08 7:54 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-08 7:52 [PATCH 1/9] fixup! scripts/common: Add write_full() and read_full() Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 2/9] fixup! scripts: Add rk-usb-loader tool Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 3/9] ARM: Rockchip: init: propagate error in init function Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 4/9] ARM: Rockchip: rk3568: make rk3568_lowlevel_init void Ahmad Fatoum 2021-11-08 7:52 ` Ahmad Fatoum [this message] 2021-11-08 8:14 ` [PATCH 5/9] ARM64: <asm/barebox-arm-head.h>: mark prologue location Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 6/9] pinctrl: Rockchip: abort probe on lack of aliases Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 7/9] clk: handle CLK_OF_DECLARE in deep probe Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 8/9] ARM: Rockchip: make rk3568's atf_load_bl31 reusable Ahmad Fatoum 2021-11-08 7:52 ` [PATCH 9/9] ARM: Rockchip: add delimiter between boards and board features Ahmad Fatoum
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