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Get LIBC_RUNTIME and LIBC_CALLS building on aarch64

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Justine Tunney 2023-05-09 01:56:56 -07:00
parent 7e46645193
commit e5e3cdf447
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GPG key ID: BE714B4575D6E328
1200 changed files with 5341 additions and 3677 deletions
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31
libc/crt/crt.S
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@ -30,6 +30,7 @@
// @note ape.S and ape-loader both set RCX to XNU on Darwin
// @noreturn
_start:
#ifdef __x86_64__
#if SupportsXnu()
// Hack for detecting M1 Rosetta environment.
@ -63,9 +64,9 @@ _start:
mov %edx,4(%rbx)
// translates arguments from old stack abi
mov (%rsp),%ebx # argc
lea 8(%rsp),%rsi # argv
lea 16(%rsp,%rbx,8),%rdx # envp
mov (%rsp),%ebx // argc
lea 8(%rsp),%rsi // argv
lea 16(%rsp,%rbx,8),%rdx // envp
mov %rsp,__oldstack(%rip)
and $-16,%rsp
xor %ebp,%ebp
@ -87,19 +88,33 @@ _start:
or $-1,%ecx
mov %rdx,%rdi
repnz scasq
mov %rdi,%rcx # auxv
mov %rdi,%rcx // auxv
#if SupportsXnu()
// xnu doesn't have auxiliary values
testb IsXnu()
jz 1f # polyfill xnu auxv
push $0 # auxv[1][1]=0
push $0 # auxv[1][0]=0
mov %rsp,%rcx # auxv
jz 1f // polyfill xnu auxv
push $0 // auxv[1][1]=0
push $0 // auxv[1][0]=0
mov %rsp,%rcx // auxv
#endif
// enter cosmopolitan runtime
1: mov %ebx,%edi
call cosmo
9: .unreachable
////////////////////////////////////////////////////////////////////////////////
#elif defined(__aarch64__)
mov x29,#0
mov x30,#0
mov x0,sp
and sp,x0,#-16
b cosmo
////////////////////////////////////////////////////////////////////////////////
#else
#error "architecture unsupported"
#endif /* __x86_64__ */
.endfn _start,weak,hidden

4
libc/crt/crt.mk
View file

@ -26,5 +26,9 @@ CRT_SRCS = libc/crt/crt.S
CRT_OBJS = o/$(MODE)/libc/crt/crt.o
$(CRT_OBJS): $(BUILD_FILES) libc/crt/crt.mk
# these assembly files are safe to build on aarch64
o/$(MODE)/libc/crt/crt.o: libc/crt/crt.S
@$(COMPILE) -AOBJECTIFY.S $(OBJECTIFY.S) $(OUTPUT_OPTION) -c $<
.PHONY: o/$(MODE)/libc/crt
o/$(MODE)/libc/crt: $(CRT)