diff options
| author | Vineet Gupta <vgupta@kernel.org> | 2020-05-21 13:33:24 -0700 |
|---|---|---|
| committer | Vineet Gupta <vgupta@kernel.org> | 2023-12-08 16:30:24 -0800 |
| commit | 9de7fc30f288ccee11c74613b9a0ee4904f6875f (patch) | |
| tree | f56defa60f62c82f7f4d168c64a0bc30d33706e4 /arch/arc/include/asm/ptrace.h | |
| parent | 33cc938e65a98f1d29d0a18403dbbee050dcad9a (diff) | |
ARC: entry: SAVE_ABI_CALLEE_REG: ISA/ABI specific helper
And for ARcompact variant replace the PUSH/POP macros with gas provided
push/pop pseudo-instructions
This allows ISA specific implementation
e.g. Current ARCv2 PUSH/POP could be replaced with STD/LDL to save 2
registers at a time (w/o bothering with SP update each time) or
perhaps use ENTER_S/LEAVE_S to reduce code size
For ARCv3 ABI changed so callee regs are now r14-r26 (vs. r13-r25)
thus would need a different implementation.
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
Diffstat (limited to 'arch/arc/include/asm/ptrace.h')
| -rw-r--r-- | arch/arc/include/asm/ptrace.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h index 4a2b30fb5a98..00b9318e551e 100644 --- a/arch/arc/include/asm/ptrace.h +++ b/arch/arc/include/asm/ptrace.h @@ -54,6 +54,10 @@ struct pt_regs { ecr_reg ecr; }; +struct callee_regs { + unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; +}; + #define MAX_REG_OFFSET offsetof(struct pt_regs, ecr) #else @@ -92,16 +96,14 @@ struct pt_regs { unsigned long status32; }; -#define MAX_REG_OFFSET offsetof(struct pt_regs, status32) - -#endif - -/* Callee saved registers - need to be saved only when you are scheduled out */ - struct callee_regs { unsigned long r25, r24, r23, r22, r21, r20, r19, r18, r17, r16, r15, r14, r13; }; +#define MAX_REG_OFFSET offsetof(struct pt_regs, status32) + +#endif + #define instruction_pointer(regs) ((regs)->ret) #define profile_pc(regs) instruction_pointer(regs) |