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Get aarch64 hello world working

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$ m=aarch64-tiny
    $ make -j8 m=$m o/$m/tool/hello/hello.com o/third_party/qemu/qemu-aarch64
    $ o/third_party/qemu/qemu-aarch64 o/$m/tool/hello/hello.com
    hello world
    $ ls -hal o/$m/tool/hello/hello.com
    -rwxr-xr-x 1 jart jart 4.0K May  9 05:04 o/aarch64-tiny/tool/hello/hello.com
This commit is contained in:
Justine Tunney 2023-05-09 02:35:05 -07:00
parent e5e3cdf447
commit ae0ee59614
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GPG key ID: BE714B4575D6E328
174 changed files with 1454 additions and 851 deletions
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12
libc/runtime/cosmo.S
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@ -83,10 +83,10 @@ cosmo: push %rbp
call _init
// call constructors
ezlea __init_array_start,ax # static ctors in forward order
.weak __init_array_start # could be called multiple times
ezlea __init_array_end,cx # idempotency recommended
.weak __init_array_end # @see ape/ape.lds
ezlea __init_array_start,ax // static ctors in forward order
.weak __init_array_start // could be called multiple times
ezlea __init_array_end,cx // idempotency recommended
.weak __init_array_end // @see ape/ape.lds
1: cmp %rax,%rcx
je 2f
push %rax
@ -163,8 +163,8 @@ cosmo: push %rbp
// we subtract 8 because the openbsd kernel always checks rsp
// is on a MAP_STACK interval non-inclusively of stack + size
leave
pop %rcx # return address
sub $8,%r8d # openbsd:stackbound
pop %rcx // return address
sub $8,%r8d // openbsd:stackbound
lea (%rax,%r8),%rsp
mov $ape_stack_align,%eax
neg %rax