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Portability fixes. Avoid some warnings.

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committer: mfx <mfx> 1089734843 +0000
This commit is contained in:
Markus F.X.J. Oberhumer 2004-07-13 16:07:23 +00:00
parent 2980a6b4bb
commit 212b674bc2
1 changed files with 19 additions and 18 deletions
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37
src/p_vmlinx.cpp
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@ -137,6 +137,7 @@ void PackVmlinuxI386::pack(OutputFile *fo)
{
unsigned fo_off = 0;
Elf_LE32_Ehdr ehdro;
LE32 tmp_le32;
// NULL
// .text(PT_LOADs) .note(1st page) .note(rest)
@ -193,7 +194,7 @@ void PackVmlinuxI386::pack(OutputFile *fo)
char const call = 0xE8; // opcode for CALL d32
fo->write(&call, 1); fo_off+=1;
fo->write(&ph.c_len, sizeof(ph.c_len)); fo_off += 4; // XXX LE32
tmp_le32 = ph.c_len; fo->write(&tmp_le32, 4); fo_off += 4;
fo->write(obuf, ph.c_len); fo_off += ph.c_len;
fo->write(loader, lsize); fo_off += lsize;
@ -211,7 +212,7 @@ void PackVmlinuxI386::pack(OutputFile *fo)
shdro[2].sh_offset = fo_off;
shdro[2].sh_size = sizeof(ph.u_len) + ph.c_len;
shdro[2].sh_addralign = 1;
fo->write(&ph.u_len, sizeof(ph.u_len)); // XXX LE32
tmp_le32 = ph.u_len; fo->write(&tmp_le32, 4);
fo->write(obuf, ph.c_len); fo_off += shdro[2].sh_size;
// .note with rest --------------------------------
@ -226,7 +227,7 @@ void PackVmlinuxI386::pack(OutputFile *fo)
shdro[3].sh_offset = fo_off;
shdro[3].sh_size = sizeof(ph.u_len) + ph.c_len;
shdro[3].sh_addralign = 1;
fo->write(&ph.u_len, sizeof(ph.u_len)); // XXX LE32
tmp_le32 = ph.u_len; fo->write(&tmp_le32, 4);
fo->write(obuf, ph.c_len); fo_off += shdro[3].sh_size;
while (0!=*p++) ;
@ -288,7 +289,7 @@ int PackVmlinuxI386::canUnpack()
|| ehdri.e_version != 1 // version
|| ehdri.e_type != Elf_LE32_Ehdr::ET_REL
|| ehdri.e_shnum < 4
|| file_size < (ehdri.e_shnum * sizeof(Elf_LE32_Shdr) + ehdri.e_shoff)
|| (unsigned)file_size < (ehdri.e_shnum * sizeof(Elf_LE32_Shdr) + ehdri.e_shoff)
)
return false;
@ -302,7 +303,7 @@ int PackVmlinuxI386::canUnpack()
for (p = shdri, j= ehdri.e_shnum; --j>=0; ++p) {
if (Elf_LE32_Shdr::SHT_STRTAB==p->sh_type
&& p->sh_size <= sizeof(shstrtab)
&& (p->sh_size + p->sh_offset) <= file_size
&& (p->sh_size + p->sh_offset) <= (unsigned) file_size
&& (10+ p->sh_name) <= p->sh_size // 1+ strlen(".shstrtab")
) {
fi->seek(p->sh_offset, SEEK_SET);
@ -320,7 +321,7 @@ int PackVmlinuxI386::canUnpack()
// check for .text .note .note and sane (.sh_size + .sh_offset)
p_note0 = p_note1 = p_text = 0;
for (p= shdri, j= ehdri.e_shnum; --j>=0; ++p) {
if (file_size < (p->sh_size + p->sh_offset)
if ((unsigned)file_size < (p->sh_size + p->sh_offset)
|| p_shstrtab->sh_size < (5+ p->sh_name) ) {
continue;
}
@ -352,15 +353,14 @@ int PackVmlinuxI386::canUnpack()
void PackVmlinuxI386::unpack(OutputFile *fo)
{
struct {
unsigned char opcode;
unsigned char d32[4];
} call;
unsigned char buf[5];
PackHeader const ph_tmp(ph);
fi->seek(p_note0->sh_offset, SEEK_SET);
fi->readx(&ph.u_len, sizeof(ph.u_len)); // XXX LE32
ibuf.alloc(ph.c_len = p_note0->sh_size - sizeof(ph.u_len));
fi->readx(&buf[0], 4);
ph.u_len = get_le32(buf);
ph.c_len = p_note0->sh_size - 4;
ibuf.alloc(ph.c_len);
fi->readx(ibuf, ph.c_len);
obuf.allocForUncompression(ph.u_len);
decompress(ibuf, obuf, false);
@ -370,10 +370,9 @@ void PackVmlinuxI386::unpack(OutputFile *fo)
ph = ph_tmp;
fi->seek(p_text->sh_offset, SEEK_SET);
fi->readx(&call, 5);
if (0xE8!=call.opcode
|| *(int *)&call.d32!=(int)ph.c_len // XXX LE32
) {
fi->readx(&buf[0], 5);
if (0xE8!=buf[0] || get_le32(&buf[1]) != ph.c_len)
{
throwCantUnpack(".text corrupted");
}
ibuf.alloc(ph.c_len);
@ -390,8 +389,10 @@ void PackVmlinuxI386::unpack(OutputFile *fo)
ibuf.dealloc();
fi->seek(p_note1->sh_offset, SEEK_SET);
fi->readx(&ph.u_len, sizeof(ph.u_len)); // XXX LE32
ibuf.alloc(ph.c_len = p_note1->sh_size - sizeof(ph.u_len));
fi->readx(&buf[0], 4);
ph.u_len = get_le32(buf);
ph.c_len = p_note1->sh_size - 4;
ibuf.alloc(ph.c_len);
fi->readx(ibuf, p_note1->sh_size - sizeof(ph.u_len));
obuf.allocForUncompression(ph.u_len);
decompress(ibuf, obuf, false);