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Add sys_execve()
+96
+1
src/kernel/emulation/linux/CMakeLists.txt
+1
src/kernel/emulation/linux/CMakeLists.txt
+86
src/kernel/emulation/linux/process/execve.c
+86
src/kernel/emulation/linux/process/execve.c
···
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#include "execve.h"
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#include "../base.h"
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#include "../errno.h"
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#include <asm/unistd.h>
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#include "../fcntl/open.h"
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#include "../unistd/read.h"
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#include "../unistd/close.h"
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#include "../unistd/readlink.h"
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#include <stdint.h>
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#define MH_MAGIC 0xfeedface
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#define MH_CIGAM 0xcefaedfe
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#define MH_MAGIC_64 0xfeedfacf
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#define MH_CIGAM_64 0xcffaedfe
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#define FAT_MAGIC 0xcafebabe
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#define FAT_CIGAM 0xbebafeca
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extern int strcmp(const char *s1, const char *s2);
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long sys_execve(char* fname, char** argvp, char** envp)
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{
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int ret, fd;
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uint32_t magic;
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char dyld_path[256];
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// Ideally, if everybody used binfmt_misc to allow direct
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// execution of Mach-O binaries under Darling, this wouldn't
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// be necessary. But we cannot rely on that.
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fd = sys_open(fname, BSD_O_RDONLY, 0);
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if (fd < 0)
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return fd;
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ret = sys_read(fd, &magic, sizeof(magic));
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if (ret != 4)
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goto no_macho;
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if (magic == MH_MAGIC || magic == MH_CIGAM
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|| magic == MH_MAGIC_64 || magic == MH_CIGAM_64
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|| magic == FAT_MAGIC || magic == FAT_CIGAM)
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{
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// It is a Mach-O file
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int len, i;
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char** modargvp;
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len = sys_readlink("/proc/self/exe", dyld_path, sizeof(dyld_path)-1);
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if (len < 0)
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goto no_macho;
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dyld_path[len] = '\0';
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// Remove 64 or 32 suffix if present
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if (strcmp(&dyld_path[len - 2], "32") == 0
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|| strcmp(&dyld_path[len - 2], "64") == 0)
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{
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dyld_path[len-2] = '\0';
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}
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// Prepend dyld path
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len = 0;
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// Count arguments
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while (argvp[len++]);
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// Allocate a new argvp, execute dyld_path
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modargvp = (char**) __builtin_alloca(sizeof(void*) * (len+1));
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modargvp[0] = dyld_path;
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modargvp[1] = fname;
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for (i = 2; i < len+1; i++)
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modargvp[i] = argvp[i-1];
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argvp = modargvp;
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fname = dyld_path;
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}
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no_macho:
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sys_close(fd);
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ret = LINUX_SYSCALL(__NR_execve, fname, argvp, envp);
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if (ret < 0)
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ret = errno_linux_to_bsd(ret);
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return ret;
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}
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+7
src/kernel/emulation/linux/process/execve.h
+7
src/kernel/emulation/linux/process/execve.h
+2
src/kernel/emulation/linux/syscalls.c
+2
src/kernel/emulation/linux/syscalls.c
···
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#include "process/vfork.h"
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#include "process/wait4.h"
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#include "process/waitid.h"
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#include "process/execve.h"
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#include "misc/ioctl.h"
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#include "misc/getrlimit.h"
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#include "misc/thread_selfid.h"
···
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[54] = sys_ioctl,
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[57] = sys_symlink,
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[58] = sys_readlink,
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[59] = sys_execve,
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[60] = sys_umask,
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[61] = sys_chroot,
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[66] = sys_vfork,