mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-03 01:38:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add APE interpreter example (#263)

Browse source
This commit is contained in:
Justine Tunney 2021-09-04 00:58:21 -07:00
parent 5b60e5a37d
commit 969174e155
7 changed files with 210 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

6
libc/elf/def.h
View file

@ -123,9 +123,9 @@
#define PN_XNUM 0xffff
#define PF_X (1 << 0)
#define PF_W (1 << 1)
#define PF_R (1 << 2)
#define PF_X 1
#define PF_W 2
#define PF_R 4
#define PF_MASKOS 0x0ff00000
#define PF_MASKPROC 0xf0000000

16
libc/linux/execve.h Normal file
View file

@ -0,0 +1,16 @@
#ifndef COSMOPOLITAN_LIBC_LINUX_EXECVE_H_
#define COSMOPOLITAN_LIBC_LINUX_EXECVE_H_
#if !(__ASSEMBLER__ + __LINKER__ + 0)
forceinline long LinuxExecve(const char *program, char *const argv[],
char *const envp[]) {
long rc;
asm volatile("syscall"
: "=a"(rc)
: "0"(59), "D"(program), "S"(argv), "d"(envp)
: "rcx", "r11", "memory");
return rc;
}
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_LINUX_EXECVE_H_ */

14
libc/linux/mmap.h
View file

@ -5,14 +5,14 @@
forceinline long LinuxMmap(void *addr, size_t size, long prot, long flags,
long fd, long off) {
long rc;
asm volatile("mov\t%5,%%r10\n\t"
"mov\t%6,%%r8\n\t"
"mov\t%7,%%r9\n\t"
"syscall"
register long flags_ asm("r10") = flags;
register long fd_ asm("r8") = fd;
register long off_ asm("r9") = off;
asm volatile("syscall"
: "=a"(rc)
: "0"(9), "D"(addr), "S"(size), "d"(prot), "g"(flags), "g"(fd),
"g"(off)
: "rcx", "r8", "r9", "r10", "r11", "memory");
: "0"(9), "D"(addr), "S"(size), "d"(prot), "r"(flags_), "r"(fd_),
"r"(off_)
: "rcx", "r11", "memory");
return rc;
}

12
libc/str/wmemset.c
View file

@ -23,9 +23,15 @@
* @asyncsignalsafe
*/
wchar_t *wmemset(wchar_t *p, wchar_t c, size_t n) {
size_t i;
for (i = 0; i < n; ++i) {
p[i] = c;
size_t i = 0;
if (n >= 4) {
wchar_t v __attribute__((__vector_size__(16))) = {c, c, c, c};
do {
__builtin_memcpy(p + i, &v, 16);
} while ((i += 4) + 4 <= n);
}
while (i < n) {
p[i++] = c;
}
return p;
}