diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-08-11 17:03:29 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-11-14 12:00:58 +0000 |
| commit | f424f2c18432f8a2c35ebafb23dd004148bce149 (patch) | |
| tree | 690c489176eb1098364be3111baf877add808c17 /arch/arm/lib | |
| parent | 2511d032f02e6426b0bd87d225b4b322a7154d15 (diff) | |
ARM: findbit: add unwinder information
Add unwinder information so oops in the findbit functions can create a
proper backtrace.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/lib')
| -rw-r--r-- | arch/arm/lib/findbit.S | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/arm/lib/findbit.S b/arch/arm/lib/findbit.S index 6ec584d16d46..b7ac2d3c0748 100644 --- a/arch/arm/lib/findbit.S +++ b/arch/arm/lib/findbit.S @@ -12,6 +12,7 @@ */ #include <linux/linkage.h> #include <asm/assembler.h> +#include <asm/unwind.h> .text #ifdef __ARMEB__ @@ -22,6 +23,7 @@ .macro find_first, endian, set, name ENTRY(_find_first_\name\()bit_\endian) + UNWIND( .fnstart) teq r1, #0 beq 3f mov r2, #0 @@ -41,11 +43,13 @@ ENTRY(_find_first_\name\()bit_\endian) blo 1b 3: mov r0, r1 @ no more bits ret lr + UNWIND( .fnend) ENDPROC(_find_first_\name\()bit_\endian) .endm .macro find_next, endian, set, name ENTRY(_find_next_\name\()bit_\endian) + UNWIND( .fnstart) cmp r2, r1 bhs 3b mov ip, r2, lsr #5 @ word index @@ -69,6 +73,7 @@ ENTRY(_find_next_\name\()bit_\endian) orr r2, r2, #31 @ no zero bits add r2, r2, #1 @ align bit pointer b 2b @ loop for next bit + UNWIND( .fnend) ENDPROC(_find_next_\name\()bit_\endian) .endm @@ -97,6 +102,7 @@ ENDPROC(_find_next_\name\()bit_\endian) * One or more bits in the LSB of r3 are assumed to be set. */ .L_found_swab: + UNWIND( .fnstart) rev_l r3, ip .L_found: #if __LINUX_ARM_ARCH__ >= 7 @@ -130,4 +136,4 @@ ENDPROC(_find_next_\name\()bit_\endian) cmp r1, r0 @ Clamp to maxbit movlo r0, r1 ret lr - + UNWIND( .fnend) |