bstanwell/wch-uf2-example
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Strip down linker script

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R
2024-04-12 18:16:22 +01:00
parent 7e0ba7151b
commit 388fbaec91
2 changed files with 11 additions and 77 deletions
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startup.S
+1 -40
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@@ -32,46 +32,7 @@ _start:
bltu a0, a1, 1b
2:
// Call preinit array functions
la s0, __preinit_array_start
la s1, __preinit_array_end
bgeu s0, s1, 2f
1:
lw t0, (s0)
jalr t0
addi s0, s0, 4
bltu s0, s1, 1b
2:
// Call init array functions
la s0, __init_array_start
la s1, __init_array_end
bgeu s0, s1, 2f
1:
lw t0, (s0)
jalr t0
addi s0, s0, 4
bltu s0, s1, 1b
2:
// Invoke main with a possible mode switch
la ra, 1f
// Invoke main
la t0, main
csrw mepc, t0
mret
1:
// Return from main, call fini array functions
la s0, __fini_array_start
la s1, __fini_array_end
bgeu s0, s1, 2f
1:
lw t0, (s0)
jalr t0
addi s0, s0, 4
bltu s0, s1, 1b
2:
// Finally, loop infinitely
wfi
j 2b