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Reduce mandatory stack rss by 256kb

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Justine Tunney 2023-09-07 04:30:44 -07:00
parent 0e087143fd
commit b592716d1c
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GPG key ID: BE714B4575D6E328
15 changed files with 98 additions and 125 deletions
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19
libc/crt/crt.S
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@ -68,14 +68,12 @@ _start:
mov %rsp,__oldstack(%rip)
mov %rdx,__envp(%rip)
// setup backtraces
// setup stack
xor %ebp,%ebp
and $ape_stack_round,%rsp
// make process stack (8mb) follow thread stack (256kb) alignment
and $-(256*1024),%rsp
#if SupportsWindows()
// make win32 imps noop
#if SupportsWindows() && !IsTiny()
// make win32 imps crash
.weak ape_idata_iat
.weak ape_idata_iatend
.weak __oops_win32
@ -122,9 +120,12 @@ _start:
// this is the first argument to cosmo() below
mov x0,sp
// make process stack (8mb) conform to thread stack (256kb) alignment
mov x1,sp
and sp,x1,-(256*1024)
// setup the stack
mov x29,#0
mov x30,#0
ldr x1,=ape_stack_round
and x1,x0,x1
mov sp,x1
// second arg shall be struct Syslib passed by ape-m1.c
// used to talk to apple's authoritarian libraries