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netbsd: startup code, first working version for arm

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git-svn-id: trunk@38591 -
This commit is contained in:
Károly Balogh 2018-03-22 01:10:37 +00:00
parent 626dc172ee
commit b06105c893
1 changed files with 24 additions and 14 deletions
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38
rtl/netbsd/arm/prt0.as
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@ -14,28 +14,38 @@
# #
# NetBSD standard (shared) ELF/arm startup code for Free Pascal # NetBSD standard (shared) ELF/arm startup code for Free Pascal
# r12/ip = ps_strings on entry
.section .text .section .text
.globl _start .globl _start
_start: _start:
# move.l %a2,-(%sp) | ps_strings mov ip, r0
# move.l %a0,-(%sp) | obj mov r0, r2
# move.l %a1,-(%sp) | cleanup mov r2, ip
# move.l 0(%a2),operatingsystem_parameter_argv ldr r3, [r2, #0]
# move.l 4(%a2),operatingsystem_parameter_argc ldr r4, =operatingsystem_parameter_argv
# move.l 8(%a2),operatingsystem_parameter_envp str r3, [r4]
# move.l 8(%a2),environ ldr r3, [r2, #4]
ldr r4, =operatingsystem_parameter_argc
str r3, [r4]
ldr r3, [r2, #8]
ldr r4, =operatingsystem_parameter_envp
str r3, [r4]
ldr r4, =environ
str r3, [r4]
# jsr PASCALMAIN # cache align, just in case
# jmp _haltproc bic sp, sp, #7
bl PASCALMAIN
bl _haltproc
.globl _haltproc .globl _haltproc
_haltproc: _haltproc:
# move.l operatingsystem_result,-(%sp) ldr r0,=operatingsystem_result
# move.l #0,-(%sp) ldr r0,[r0]
# moveq.l #1,%d0 svc 0xa00001
# trap #0
# rts
.section .data .section .data