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Get Redbean fork() working on the New Technology

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Now that we have understandable system call tracing on Windows, this
change rewrites many of the polyfill internals for that platform, to
help things get closer to tip top shape. Support for complex forking
scenarios had been in a regressed state for quite some time. Now, it
works! Subsequent changes should be able to address the performance.
This commit is contained in:
Justine Tunney 2022-03-20 08:01:14 -07:00
parent efedef6e65
commit 0cb6b6ff4b
84 changed files with 1340 additions and 338 deletions
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10
libc/sysv/systemfive.S
View file

@ -23,7 +23,6 @@
#include "libc/sysv/consts/map.h"
#include "libc/sysv/consts/nr.h"
#include "libc/sysv/consts/prot.h"
#include "libc/sysv/consts/prot.h"
/* ▄▄▄
▄▄▄ ▀▓▓▒▄
@ -418,11 +417,13 @@ _init_systemfive_stack:
// m.p[0].h 32 8
// m.p[0].prot 40 4
// m.p[0].flags 44 4
// m.p[0].offset 48 8
// m.p[0].size 56 8
.weak _mmi
ezlea _mmi,cx
test %rcx,%rcx
push %r9 # save the stack size
jz 3f
push %r9 # save the stack size
lea -1(%r11,%r9),%r9 # need incl. interval
shr $16,%r11 # for the stack range
shr $16,%r9
@ -432,8 +433,9 @@ _init_systemfive_stack:
orq $-1,32(%rcx) # _mmi.s[0].h
mov %edx,40(%rcx) # _mmi.s[0].prot
mov %r10d,44(%rcx) # _mmi.s[0].flags
3: pop %r9 # restore stack size
pop %rsi
pop %r9 # restore stack size
mov %r9,56(%rcx) # _mmi.s[0].size
3: pop %rsi
pop %rdi
leave
// switch stacks