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gcc-4.1.0 vs. mmap()

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linux.hh
	fold_elf86.asm  l_lx_elf.c
	fold_exec86.asm l_lx_exec.c
	fold_pti86.asm  l_lx_pti.c
	fold_sh86.asm   l_lx_sh.c    l_lx_sh86.asm
	l_lx_sep.c

committer: jreiser <jreiser> 1142305438 +0000
This commit is contained in:
John Reiser
2006-03-14 03:03:58 +00:00
parent a3097d5e25
commit 676cacff04
11 changed files with 72 additions and 57 deletions
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src/stub/l_lx_elf.c
+5 -11
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@@ -96,14 +96,8 @@ do_brk(void *addr)
return brk(addr);
}
static char *
__attribute_cdecl
do_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t offset)
{
(void)len; (void)prot; (void)flags; (void)fd; (void)offset;
return mmap((void *)&addr);
}
extern char *mmap(void *addr, size_t len,
int prot, int flags, int fd, off_t offset);
/*************************************************************************
// UPX & NRV stuff
@@ -274,7 +268,7 @@ 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 = do_mmap((void *)lo, hi, PROT_READ|PROT_WRITE|PROT_EXEC,
addr = mmap((void *)lo, hi, PROT_READ|PROT_WRITE|PROT_EXEC,
mflags, 0, 0 );
*p_brk = hi + addr; // the logical value of brk(0)
munmap(szlo + addr, hi - szlo); // desirable if PT_LOAD non-contiguous
@@ -306,7 +300,7 @@ do_xmap(int const fdi, Elf32_Ehdr const *const ehdr, struct Extent *const xi,
addr -= frag;
// Decompressor can overrun the destination by 3 bytes.
if (addr != do_mmap(addr, mlen + (xi ? 3 : 0), PROT_READ | PROT_WRITE,
if (addr != mmap(addr, mlen + (xi ? 3 : 0), PROT_READ | PROT_WRITE,
MAP_FIXED | MAP_PRIVATE | (xi ? MAP_ANONYMOUS : 0),
fdi, phdr->p_offset - frag) ) {
err_exit(8);
@@ -331,7 +325,7 @@ ERR_LAB
}
addr += mlen + frag; /* page boundary on hi end */
if (addr < haddr) { // need pages for .bss
if (addr != do_mmap(addr, haddr - addr, prot,
if (addr != mmap(addr, haddr - addr, prot,
MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, 0, 0 ) ) {
err_exit(9);
}