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Give message on stderr when SELinux enforcing mode inhibits execution.

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l_lx_elf.c fold_elf86.asm fold_elf86.h

committer: jreiser <jreiser> 1145393418 +0000
This commit is contained in:
John Reiser
2006-04-18 20:50:18 +00:00
parent 2eb6e3b0ea
commit 58cce9d2f8
3 changed files with 145 additions and 138 deletions
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src/stub/l_lx_elf.c
+5 -3
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@@ -90,6 +90,8 @@ err_exit(int a) __attribute__ ((__noreturn__));
}
#endif //}
extern void die_SELinux();
static void *
do_brk(void *addr)
{
@@ -268,8 +270,7 @@ xfind_pages(unsigned mflags, Elf32_Phdr const *phdr, int phnum,
lo -= ~PAGE_MASK & lo; // round down to page boundary
hi = PAGE_MASK & (hi - lo - PAGE_MASK -1); // page length
szlo = PAGE_MASK & (szlo - PAGE_MASK -1); // page length
addr = mmap((void *)lo, hi, PROT_READ|PROT_WRITE|PROT_EXEC,
mflags, 0, 0 );
addr = mmap((void *)lo, hi, PROT_NONE, mflags, -1, 0 ); // just reserve address space
*p_brk = hi + addr; // the logical value of brk(0)
munmap(szlo + addr, hi - szlo); // desirable if PT_LOAD non-contiguous
return (unsigned long)addr - lo;
@@ -320,13 +321,14 @@ do_xmap(int const fdi, Elf32_Ehdr const *const ehdr, struct Extent *const xi,
}
}
if (0!=mprotect(addr, mlen, prot)) {
die_SELinux();
err_exit(10);
ERR_LAB
}
addr += mlen + frag; /* page boundary on hi end */
if (addr < haddr) { // need pages for .bss
if (addr != mmap(addr, haddr - addr, prot,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, 0, 0 ) ) {
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0 ) ) {
err_exit(9);
}
}