Added test example

This commit is contained in:
Erin 2023-10-20 02:05:00 +02:00
parent a944a145ed
commit 4b45407a70
3 changed files with 100 additions and 0 deletions

100
examples/asm/hello-name.hba Normal file
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jmp entry
puts:
-- Write string to console
-- r2: [IN] *const u8 String pointer
-- r3: [IN] usize String length
li8 r1, 0x1 -- Write syscall
brc r2, r3, 2 -- Copy parameters
li8 r2, 0x1 -- STDOUT
eca
jal r0, r31, 0
gets:
-- Read string until end of buffer or LF
-- r2: [IN] *mut u8 Buffer
-- r3: [IN] usize Buffer length
-- Register allocations:
-- r33: *mut u8 Buffer end
-- r34: u8 Immediate char
-- r35: u8 Const [0x0A = LF]
li8 r35, 0x0A
add64 r33, r2, r3
-- Setup syscall
li8 r2, 0x1 -- Stdin
cp r3, r2
li8 r4, 0x1 -- Read one char
jeq r3, r33, end
loop:
li8 r1, 0x1 -- Read syscall
eca
addi64 r3, r3, 1
ld r34, r3, 0, 1
jeq r34, r35, end
jne r3, r33, loop
end:
-- Set copied amount
sub64 r1, r33, r3
addi64 r1, -1
jal r0, r31, 0
alloc-pages:
-- Allocate pages
-- r1: [OUT] *mut u8 Pointer to page
-- r2: [IN] u16 Page count
muli16 r3, r2, 4096 -- page count
li8 r1, 0x9 -- mmap syscall
li8 r2, 0x0 -- no address set, kernel chosen
li8 r4, 0x2 -- PROT_WRITE
li8 r5, 0x20 -- MAP_ANONYMOUS
li64 r6, -1 -- Doesn't map file
li8 r7, 0x0 -- Doesn't map file
eca
jal r0, r31, 0
entry:
-- Program entrypoint
-- Register allocations:
-- r32: *mut u8 Buffer
-- r36: usize Read buffer length
-- Allocate one page (4096 KiB)
li8 r2, 1
jal r31, 0, alloc-pages
cp r32, r1
-- Print message
lra16 r2, r0, #enter-your-name
li8 r3, 17
jal r31, r0, puts
-- Read name
cp r2, r32
li16 r3, 4096
jal r31, r0, gets
cp r36, r1
-- Print your name is
lra16 r2, r0, #your-name-is
li8 r3, 15
jal r31, r0, puts
-- And now print the name
cp r2, r32
cp r3, r36
jal r31, r0, puts
tx
#enter-your-name: "Enter your name: "
#your-name-is : "\nYour name is: "