FreeCalypso > hg > freecalypso-tools

annotate target-utils/env/crt0.S @ 737:6d97866bad79

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first round of documentation for DUART28C boot control addition
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 16 Sep 2020 06:10:39 +0000
parents e7502631a0f9
children
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1 #include "halt.h"
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2
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3 .text
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4 .code 32
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5 .global _entry
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6 _entry:
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7 ldr sp, =stack_bottom
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8 @ zero bss
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9 ldr r0, =__bss_start
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10 ldr r2, =__bss_end
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11 sub r1, r2, r0
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12 bl bzero
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13 @ C code entry
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14 bl main
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15 mov r0, #HALTCODE_MAINEXITED
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16 .global _exit
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17 _exit: nop
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18 1: nop
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19 b 1b