| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #include <linux/export.h> |
| #include <linux/linkage.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/nospec-insn.h> |
| |
| #define R2_OFF 0 |
| #define R5_OFF (R2_OFF + (5 - 2 + 1) * 8) |
| #define R14_OFF (R5_OFF + 8) |
| #define RETADDR_OFF (R14_OFF + 8) |
| #define R15_OFF (RETADDR_OFF + 8) |
| #define BACKCHAIN_OFF (R15_OFF + 8) |
| #define FRAME_SIZE (BACKCHAIN_OFF + 8) |
| #define FRAME_OFF (STACK_FRAME_OVERHEAD - FRAME_SIZE) |
| #if (FRAME_OFF + BACKCHAIN_OFF) != __SF_BACKCHAIN |
| #error Stack frame layout calculation is broken |
| #endif |
| |
| GEN_BR_THUNK %r1 |
| |
| SYM_FUNC_START(arch_bpf_timed_may_goto) |
| /* |
| * This function has a special ABI: the parameters are in %r12 and |
| * %r13; the return value is in %r12; all GPRs except %r0, %r1, and |
| * %r12 are callee-saved; and the return address is in %r0. |
| */ |
| stmg %r2,%r5,FRAME_OFF+R2_OFF(%r15) |
| stg %r14,FRAME_OFF+R14_OFF(%r15) |
| stg %r0,FRAME_OFF+RETADDR_OFF(%r15) |
| stg %r15,FRAME_OFF+R15_OFF(%r15) |
| lgr %r1,%r15 |
| lay %r15,-FRAME_SIZE(%r15) |
| stg %r1,__SF_BACKCHAIN(%r15) |
| |
| lay %r2,0(%r12,%r13) |
| brasl %r14,bpf_check_timed_may_goto |
| lgr %r12,%r2 |
| |
| lg %r15,FRAME_SIZE+FRAME_OFF+R15_OFF(%r15) |
| lmg %r2,%r5,FRAME_OFF+R2_OFF(%r15) |
| lg %r14,FRAME_OFF+R14_OFF(%r15) |
| lg %r1,FRAME_OFF+RETADDR_OFF(%r15) |
| BR_EX %r1 |
| SYM_FUNC_END(arch_bpf_timed_may_goto) |
