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| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2017-10-06 19:39:57 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2017-10-12 11:28:29 +0100 |
| commit | ee3eaee6a1dafb7ed7213ec2fad22552b4d58ed1 (patch) | |
| tree | 0f2d994489012bf0d0de415fa1895be32b808d39 | |
| parent | 6042b8c7c08cad7a8bdc0456c619ae941962b40a (diff) | |
| download | linux-ee3eaee6a1dafb7ed7213ec2fad22552b4d58ed1.tar.gz | |
ARM: 8704/1: semihosting: use proper instruction on v7m processors
The svc instruction doesn't exist on v7m processors. Semihosting ops are invoked with the bkpt instruction instead. Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/boot/compressed/debug.S | 4 | ||||
| -rw-r--r-- | arch/arm/kernel/debug.S | 8 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/boot/compressed/debug.S b/arch/arm/boot/compressed/debug.S index 5392ee63338f..8f6e37177de1 100644 --- a/arch/arm/boot/compressed/debug.S +++ b/arch/arm/boot/compressed/debug.S @@ -23,7 +23,11 @@ ENTRY(putc) strb r0, [r1] mov r0, #0x03 @ SYS_WRITEC ARM( svc #0x123456 ) +#ifdef CONFIG_CPU_V7M + THUMB( bkpt #0xab ) +#else THUMB( svc #0xab ) +#endif mov pc, lr .align 2 1: .word _GLOBAL_OFFSET_TABLE_ - . diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index ea9646cc2a0e..0a498cb3fad8 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -115,7 +115,11 @@ ENTRY(printascii) mov r1, r0 mov r0, #0x04 @ SYS_WRITE0 ARM( svc #0x123456 ) +#ifdef CONFIG_CPU_V7M + THUMB( bkpt #0xab ) +#else THUMB( svc #0xab ) +#endif ret lr ENDPROC(printascii) @@ -124,7 +128,11 @@ ENTRY(printch) strb r0, [r1] mov r0, #0x03 @ SYS_WRITEC ARM( svc #0x123456 ) +#ifdef CONFIG_CPU_V7M + THUMB( bkpt #0xab ) +#else THUMB( svc #0xab ) +#endif ret lr ENDPROC(printch) |