^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0-only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * linux/arch/arm/kernel/entry-common.S
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2000 Russell King
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <asm/assembler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <asm/unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/ftrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/unwind.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/memory.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #ifdef CONFIG_AEABI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/unistd-oabi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) .equ NR_syscalls, __NR_syscalls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #ifdef CONFIG_NEED_RET_TO_USER
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <mach/entry-macro.S>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) .macro arch_ret_to_user, tmp1, tmp2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include "entry-header.S"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) saved_psr .req r8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #if defined(CONFIG_TRACE_IRQFLAGS) || defined(CONFIG_CONTEXT_TRACKING)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) saved_pc .req r9
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define TRACE(x...) x
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) saved_pc .req lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define TRACE(x...)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .section .entry.text,"ax",%progbits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #if !(IS_ENABLED(CONFIG_TRACE_IRQFLAGS) || IS_ENABLED(CONFIG_CONTEXT_TRACKING) || \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) IS_ENABLED(CONFIG_DEBUG_RSEQ))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * This is the fast syscall return path. We do as little as possible here,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * such as avoiding writing r0 to the stack. We only use this path if we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * have tracing, context tracking and rseq debug disabled - the overheads
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * from those features make this path too inefficient.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) ret_fast_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) __ret_fast_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) UNWIND(.fnstart )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) UNWIND(.cantunwind )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) disable_irq_notrace @ disable interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) ldr r2, [tsk, #TI_ADDR_LIMIT]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) cmp r2, #TASK_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) blne addr_limit_check_failed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) bne fast_work_pending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) /* perform architecture specific actions before user return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) arch_ret_to_user r1, lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) restore_user_regs fast = 1, offset = S_OFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) UNWIND(.fnend )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ENDPROC(ret_fast_syscall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) /* Ok, we need to do extra processing, enter the slow path. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) fast_work_pending:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) str r0, [sp, #S_R0+S_OFF]! @ returned r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* fall through to work_pending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * The "replacement" ret_fast_syscall for when tracing, context tracking,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * or rseq debug is enabled. As we will need to call out to some C functions,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * we save r0 first to avoid needing to save registers around each C function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ret_fast_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) __ret_fast_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) UNWIND(.fnstart )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) UNWIND(.cantunwind )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #if IS_ENABLED(CONFIG_DEBUG_RSEQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* do_rseq_syscall needs interrupts enabled. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) mov r0, sp @ 'regs'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) bl do_rseq_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) disable_irq_notrace @ disable interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ldr r2, [tsk, #TI_ADDR_LIMIT]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) cmp r2, #TASK_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) blne addr_limit_check_failed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) ldr r1, [tsk, #TI_FLAGS] @ re-check for syscall tracing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) tst r1, #_TIF_SYSCALL_WORK | _TIF_WORK_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) beq no_work_pending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) UNWIND(.fnend )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ENDPROC(ret_fast_syscall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) /* Slower path - fall through to work_pending */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) tst r1, #_TIF_SYSCALL_WORK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) bne __sys_trace_return_nosave
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) slow_work_pending:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) mov r0, sp @ 'regs'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) mov r2, why @ 'syscall'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) bl do_work_pending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) cmp r0, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) beq no_work_pending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) movlt scno, #(__NR_restart_syscall - __NR_SYSCALL_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ldmia sp, {r0 - r6} @ have to reload r0 - r6
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) b local_restart @ ... and off we go
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) ENDPROC(ret_fast_syscall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * "slow" syscall return path. "why" tells us if this was a real syscall.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) * IRQs may be enabled here, so always disable them. Note that we use the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * "notrace" version to avoid calling into the tracing code unnecessarily.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * do_work_pending() will update this state if necessary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) ENTRY(ret_to_user)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) ret_slow_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) #if IS_ENABLED(CONFIG_DEBUG_RSEQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* do_rseq_syscall needs interrupts enabled. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) enable_irq_notrace @ enable interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) mov r0, sp @ 'regs'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) bl do_rseq_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) disable_irq_notrace @ disable interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) ENTRY(ret_to_user_from_irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) ldr r2, [tsk, #TI_ADDR_LIMIT]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) cmp r2, #TASK_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) blne addr_limit_check_failed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ldr r1, [tsk, #TI_FLAGS]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) tst r1, #_TIF_WORK_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) bne slow_work_pending
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) no_work_pending:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) asm_trace_hardirqs_on save = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* perform architecture specific actions before user return */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) arch_ret_to_user r1, lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ct_user_enter save = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) restore_user_regs fast = 0, offset = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ENDPROC(ret_to_user_from_irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ENDPROC(ret_to_user)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * This is how we return from a fork.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ENTRY(ret_from_fork)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) bl schedule_tail
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) cmp r5, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) movne r0, r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) badrne lr, 1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) retne r5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 1: get_thread_info tsk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) b ret_slow_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) ENDPROC(ret_from_fork)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) /*=============================================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * SWI handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) *-----------------------------------------------------------------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) #ifdef CONFIG_HARDEN_BRANCH_HISTORY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) ENTRY(vector_bhb_loop8_swi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) sub sp, sp, #PT_REGS_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) stmia sp, {r0 - r12}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) mov r8, #8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 1: b 2f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 2: subs r8, r8, #1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) bne 1b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) dsb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) isb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) b 3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) ENDPROC(vector_bhb_loop8_swi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) ENTRY(vector_bhb_bpiall_swi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) sub sp, sp, #PT_REGS_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) stmia sp, {r0 - r12}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) mcr p15, 0, r8, c7, c5, 6 @ BPIALL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) isb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) b 3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) ENDPROC(vector_bhb_bpiall_swi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) ENTRY(vector_swi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #ifdef CONFIG_CPU_V7M
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) v7m_exception_entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) sub sp, sp, #PT_REGS_SIZE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) stmia sp, {r0 - r12} @ Calling r0 - r12
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) ARM( add r8, sp, #S_PC )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ARM( stmdb r8, {sp, lr}^ ) @ Calling sp, lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) THUMB( mov r8, sp )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) THUMB( store_user_sp_lr r8, r10, S_SP ) @ calling sp, lr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) mrs saved_psr, spsr @ called from non-FIQ mode, so ok.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) TRACE( mov saved_pc, lr )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) str saved_pc, [sp, #S_PC] @ Save calling PC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) str saved_psr, [sp, #S_PSR] @ Save CPSR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) str r0, [sp, #S_OLD_R0] @ Save OLD_R0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) zero_fp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) alignment_trap r10, ip, __cr_alignment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) asm_trace_hardirqs_on save=0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) enable_irq_notrace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) ct_user_exit save=0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * Get the system call number.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) #if defined(CONFIG_OABI_COMPAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) * If we have CONFIG_OABI_COMPAT then we need to look at the swi
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * value to determine if it is an EABI or an old ABI call.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) #ifdef CONFIG_ARM_THUMB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) tst saved_psr, #PSR_T_BIT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) movne r10, #0 @ no thumb OABI emulation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) USER( ldreq r10, [saved_pc, #-4] ) @ get SWI instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) USER( ldr r10, [saved_pc, #-4] ) @ get SWI instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) ARM_BE8(rev r10, r10) @ little endian instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) #elif defined(CONFIG_AEABI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * Pure EABI user space always put syscall number into scno (r7).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) #elif defined(CONFIG_ARM_THUMB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) /* Legacy ABI only, possibly thumb mode. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) tst saved_psr, #PSR_T_BIT @ this is SPSR from save_user_regs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) addne scno, r7, #__NR_SYSCALL_BASE @ put OS number in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) USER( ldreq scno, [saved_pc, #-4] )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) /* Legacy ABI only. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) USER( ldr scno, [saved_pc, #-4] ) @ get SWI instruction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /* saved_psr and saved_pc are now dead */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) uaccess_disable tbl
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) adr tbl, sys_call_table @ load syscall table pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) #if defined(CONFIG_OABI_COMPAT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) * If the swi argument is zero, this is an EABI call and we do nothing.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) * If this is an old ABI call, get the syscall number into scno and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * get the old ABI syscall table address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) bics r10, r10, #0xff000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) eorne scno, r10, #__NR_OABI_SYSCALL_BASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) ldrne tbl, =sys_oabi_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #elif !defined(CONFIG_AEABI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) bic scno, scno, #0xff000000 @ mask off SWI op-code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) eor scno, scno, #__NR_SYSCALL_BASE @ check OS number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) get_thread_info tsk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * Reload the registers that may have been corrupted on entry to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * the syscall assembly (by tracing or context tracking.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) TRACE( ldmia sp, {r0 - r3} )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) local_restart:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) ldr r10, [tsk, #TI_FLAGS] @ check for syscall tracing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) stmdb sp!, {r4, r5} @ push fifth and sixth args
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) tst r10, #_TIF_SYSCALL_WORK @ are we tracing syscalls?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) bne __sys_trace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) invoke_syscall tbl, scno, r10, __ret_fast_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) add r1, sp, #S_OFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 2: cmp scno, #(__ARM_NR_BASE - __NR_SYSCALL_BASE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) eor r0, scno, #__NR_SYSCALL_BASE @ put OS number back
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) bcs arm_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) mov why, #0 @ no longer a real syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) b sys_ni_syscall @ not private func
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) #if defined(CONFIG_OABI_COMPAT) || !defined(CONFIG_AEABI)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) * We failed to handle a fault trying to access the page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) * containing the swi instruction, but we're not really in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) * position to return -EFAULT. Instead, return back to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) * instruction and re-enter the user fault handling path trying
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * to page it in. This will likely result in sending SEGV to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * current task.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 9001:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) sub lr, saved_pc, #4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) str lr, [sp, #S_PC]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) get_thread_info tsk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) b ret_fast_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) ENDPROC(vector_swi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) * This is the really slow path. We're going to be doing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * context switches, and waiting for our parent to respond.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) __sys_trace:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) mov r1, scno
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) add r0, sp, #S_OFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) bl syscall_trace_enter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) mov scno, r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) invoke_syscall tbl, scno, r10, __sys_trace_return, reload=1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) cmp scno, #-1 @ skip the syscall?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) bne 2b
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) add sp, sp, #S_OFF @ restore stack
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) __sys_trace_return_nosave:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) enable_irq_notrace
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) mov r0, sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) bl syscall_trace_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) b ret_slow_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) __sys_trace_return:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) str r0, [sp, #S_R0 + S_OFF]! @ save returned r0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) mov r0, sp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) bl syscall_trace_exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) b ret_slow_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) .align 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) #ifdef CONFIG_ALIGNMENT_TRAP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) .type __cr_alignment, #object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) __cr_alignment:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) .word cr_alignment
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) .ltorg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) .macro syscall_table_start, sym
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) .equ __sys_nr, 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) .type \sym, #object
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) ENTRY(\sym)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) .macro syscall, nr, func
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) .ifgt __sys_nr - \nr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) .error "Duplicated/unorded system call entry"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) .endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) .rept \nr - __sys_nr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) .long sys_ni_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) .endr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) .long \func
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) .equ __sys_nr, \nr + 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) .macro syscall_table_end, sym
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) .ifgt __sys_nr - __NR_syscalls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) .error "System call table too big"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) .endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) .rept __NR_syscalls - __sys_nr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) .long sys_ni_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) .endr
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) .size \sym, . - \sym
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) .endm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) #define NATIVE(nr, func) syscall nr, func
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) * This is the syscall table declaration for native ABI syscalls.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * With EABI a couple syscalls are obsolete and defined as sys_ni_syscall.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) syscall_table_start sys_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) #define COMPAT(nr, native, compat) syscall nr, native
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) #ifdef CONFIG_AEABI
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) #include <calls-eabi.S>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) #include <calls-oabi.S>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) #undef COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) syscall_table_end sys_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) /*============================================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) * Special system call wrappers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) @ r0 = syscall number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) @ r8 = syscall table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) sys_syscall:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) bic scno, r0, #__NR_OABI_SYSCALL_BASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) cmp scno, #__NR_syscall - __NR_SYSCALL_BASE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) cmpne scno, #NR_syscalls @ check range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) #ifdef CONFIG_CPU_SPECTRE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) movhs scno, #0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) csdb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) stmialo sp, {r5, r6} @ shuffle args
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) movlo r0, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) movlo r1, r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) movlo r2, r3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) movlo r3, r4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) ldrlo pc, [tbl, scno, lsl #2]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) b sys_ni_syscall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ENDPROC(sys_syscall)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) sys_sigreturn_wrapper:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) add r0, sp, #S_OFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) mov why, #0 @ prevent syscall restart handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) b sys_sigreturn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) ENDPROC(sys_sigreturn_wrapper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) sys_rt_sigreturn_wrapper:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) add r0, sp, #S_OFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) mov why, #0 @ prevent syscall restart handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) b sys_rt_sigreturn
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) ENDPROC(sys_rt_sigreturn_wrapper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) sys_statfs64_wrapper:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) teq r1, #88
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) moveq r1, #84
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) b sys_statfs64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) ENDPROC(sys_statfs64_wrapper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) sys_fstatfs64_wrapper:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) teq r1, #88
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) moveq r1, #84
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) b sys_fstatfs64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) ENDPROC(sys_fstatfs64_wrapper)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * Note: off_4k (r5) is always units of 4K. If we can't do the requested
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * offset, we return EINVAL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) sys_mmap2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) str r5, [sp, #4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) b sys_mmap_pgoff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) ENDPROC(sys_mmap2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) #ifdef CONFIG_OABI_COMPAT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) * These are syscalls with argument register differences
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) sys_oabi_pread64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) stmia sp, {r3, r4}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) b sys_pread64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) ENDPROC(sys_oabi_pread64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) sys_oabi_pwrite64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) stmia sp, {r3, r4}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) b sys_pwrite64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) ENDPROC(sys_oabi_pwrite64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) sys_oabi_truncate64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) mov r3, r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) mov r2, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) b sys_truncate64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) ENDPROC(sys_oabi_truncate64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) sys_oabi_ftruncate64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) mov r3, r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) mov r2, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) b sys_ftruncate64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) ENDPROC(sys_oabi_ftruncate64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) sys_oabi_readahead:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) str r3, [sp]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) mov r3, r2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) mov r2, r1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) b sys_readahead
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) ENDPROC(sys_oabi_readahead)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) * Let's declare a second syscall table for old ABI binaries
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) * using the compatibility syscall entries.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) syscall_table_start sys_oabi_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) #define COMPAT(nr, native, compat) syscall nr, compat
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) #include <calls-oabi.S>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) syscall_table_end sys_oabi_call_table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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