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Add APE interpreter example (#263)

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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
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16
libc/linux/execve.h Normal file
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@ -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
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@ -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;
}