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Perform more low-level code cleanup

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This commit is contained in:
Justine Tunney 2022-09-09 04:07:08 -07:00
parent c32e2d4486
commit 2d17ab016c
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GPG key ID: BE714B4575D6E328
42 changed files with 977 additions and 265 deletions
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21
libc/runtime/morph.greg.c
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@ -18,12 +18,12 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#define ShouldUseMsabiAttribute() 1
#include "libc/assert.h"
#include "libc/intrin/asmflag.h"
#include "libc/calls/internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/calls/struct/sigset.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/asmflag.h"
#include "libc/intrin/kprintf.h"
#include "libc/nt/enum/pageflags.h"
#include "libc/nt/memory.h"
@ -50,7 +50,7 @@ static privileged void __morph_mprotect(void *addr, size_t size, int prot,
"syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax), "=d"(dx)
: "1"(__NR_mprotect), "D"(addr), "S"(size), "2"(prot)
: "rcx", "r11", "memory");
: "rcx", "r8", "r9", "r10", "r11", "memory");
#ifndef NDEBUG
if (cf) ax = -ax;
if (ax == -EPERM) {
@ -58,6 +58,7 @@ static privileged void __morph_mprotect(void *addr, size_t size, int prot,
_Exit(26);
}
#endif
if (ax) notpossible;
} else {
__imp_VirtualProtect(addr, size, ntprot, &op);
}
@ -81,15 +82,15 @@ privileged void __morph_begin(void) {
: "=a"(ax), "=d"(dx)
: "0"(__NR_sigprocmask), "D"(SIG_BLOCK), "S"(&ss),
"1"(&oldss)
: "rcx", "r10", "r11", "memory", "cc");
assert(!ax);
: "rcx", "r8", "r9", "r10", "r11", "memory", "cc");
if (ax) notpossible;
} else {
asm volatile(CFLAG_ASM("syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax), "=d"(dx)
: "1"(__NR_sigprocmask), "D"(SIG_BLOCK), "S"(-1u)
: "rcx", "r11", "memory");
: "rcx", "r8", "r9", "r10", "r11", "memory");
oldss.__bits[0] = ax & 0xffffffff;
assert(!cf);
if (cf) notpossible;
}
}
__morph_mprotect(_base, __privileged_addr - _base, PROT_READ | PROT_WRITE,
@ -112,15 +113,15 @@ privileged void __morph_end(void) {
: "=a"(ax), "=d"(dx)
: "0"(__NR_sigprocmask), "D"(SIG_SETMASK), "S"(&oldss),
"1"(0)
: "rcx", "r10", "r11", "memory", "cc");
assert(!ax);
: "rcx", "r8", "r9", "r10", "r11", "memory", "cc");
if (ax) notpossible;
} else {
asm volatile(CFLAG_ASM("syscall")
: CFLAG_CONSTRAINT(cf), "=a"(ax), "=d"(dx)
: "1"(__NR_sigprocmask), "D"(SIG_SETMASK),
"S"(oldss.__bits[0])
: "rcx", "r11", "memory");
assert(!cf);
: "rcx", "r8", "r9", "r10", "r11", "memory");
if (cf) notpossible;
}
}
STRACE("__morph_end()");