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9eb59201ab
To build the API examples on RISC-V we need to implement _start and syscall for RISC-V. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
128 lines
1.6 KiB
ArmAsm
128 lines
1.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2007 Semihalf
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*
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* Written by: Rafal Jaworowski <raj@semihalf.com>
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*/
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#if defined(CONFIG_PPC)
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.text
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.globl _start
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_start:
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lis %r11, search_hint@ha
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addi %r11, %r11, search_hint@l
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stw %r1, 0(%r11)
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b main
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.globl syscall
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syscall:
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lis %r11, syscall_ptr@ha
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addi %r11, %r11, syscall_ptr@l
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lwz %r11, 0(%r11)
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mtctr %r11
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bctr
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#elif defined(CONFIG_ARM) && !defined(CONFIG_ARM64)
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.text
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.globl _start
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_start:
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ldr ip, =search_hint
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str sp, [ip]
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b main
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.globl syscall
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syscall:
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ldr ip, =syscall_ptr
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ldr pc, [ip]
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#elif defined(CONFIG_ARM64)
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.text
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.globl _start
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_start:
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ldr x17, =search_hint
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mov x16, sp
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str x16, [x17]
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b main
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.globl syscall
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syscall:
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ldr x16, =syscall_ptr
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ldr x16, [x16]
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br x16
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#elif defined(CONFIG_MIPS)
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#include <asm/asm.h>
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.text
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.globl __start
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.ent __start
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__start:
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PTR_S $sp, search_hint
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b main
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.end __start
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.globl syscall
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.ent syscall
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syscall:
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PTR_S $ra, return_addr
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PTR_L $t9, syscall_ptr
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jalr $t9
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nop
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PTR_L $ra, return_addr
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jr $ra
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nop
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.end syscall
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return_addr:
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.align 8
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.long 0
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#elif defined(CONFIG_ARCH_RV32I)
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.text
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.globl _start
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_start:
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la t0, search_hint
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sw sp, 0(t0)
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la t0, main
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jalr x0, t0
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.globl syscall
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syscall:
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la t0, syscall_ptr
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lw t0, 0(t0)
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jalr x0, t0
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#elif defined(CONFIG_ARCH_RV64I)
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.text
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.globl _start
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_start:
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la t0, search_hint
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sd sp, 0(t0)
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la t0, main
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jalr x0, t0
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.globl syscall
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syscall:
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la t0, syscall_ptr
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ld t0, 0(t0)
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jalr x0, t0
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#else
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#error No support for this arch!
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#endif
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.section .data
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.globl syscall_ptr
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syscall_ptr:
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.align 8
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.long 0
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.globl search_hint
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search_hint:
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.long 0
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