Add syscall 136 personality

mehfooz09 · Feb 17, 2020 · dfb9f66 · dfb9f66
1 parent 2f5ce68
commit dfb9f66
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Showing 3 changed files with 11 additions and 0 deletions.
diff --git a/kernel/calls.c b/kernel/calls.c
@@ -88,6 +88,7 @@ syscall_t syscall_table[] = {
     [125] = (syscall_t) sys_mprotect,
     [132] = (syscall_t) sys_getpgid,
     [133] = (syscall_t) sys_fchdir,
+    [136] = (syscall_t) sys_personality,
     [140] = (syscall_t) sys__llseek,
     [141] = (syscall_t) sys_getdents,
     [142] = (syscall_t) sys_select,

diff --git a/kernel/calls.h b/kernel/calls.h
@@ -190,6 +190,7 @@ dword_t sys_getcwd(addr_t buf_addr, dword_t size);
 dword_t sys_chdir(addr_t path_addr);
 dword_t sys_chroot(addr_t path_addr);
 dword_t sys_fchdir(fd_t f);
+dword_t sys_personality(dword_t pers);
 int task_set_thread_area(struct task *task, addr_t u_info);
 int sys_set_thread_area(addr_t u_info);
 int sys_set_tid_address(addr_t blahblahblah);

diff --git a/kernel/getset.c b/kernel/getset.c
@@ -170,3 +170,12 @@ int_t sys_capset(addr_t header_addr, addr_t data_addr) {
     STRACE("capset(%#x, %#x)", header_addr, data_addr);
     return 0;
 }
+
+// minimal version according to Linux sys/personality.h
+dword_t sys_personality(dword_t pers) {
+    if (pers == 0xffffffff)  // get personality, return default (Linux)
+        return 0x00000000;
+    if (pers == 0x00000000)  // set personality to Linux
+        return 0x00000000;
+    return -1;  // otherwise return error
+}