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Compress shared library for i386-linux. DT_INIT must exist. Everything

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needed by ld-linux for runtime relocation must be at the beginning of the
first PT_LOAD, etc.
This commit is contained in:
John Reiser
2009-10-15 20:35:07 -07:00
parent 90ddc06c98
commit 856ecb84a0
6 changed files with 3837 additions and 108 deletions
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src/p_lx_elf.h
+29 -5
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@@ -63,7 +63,12 @@ protected:
virtual void addStubEntrySections(Filter const *);
virtual void unpack(OutputFile *fo) = 0;
virtual unsigned elf_get_offset_from_address(unsigned) const = 0;
virtual void const *elf_find_dynamic(unsigned) const = 0;
virtual uint64_t elf_unsigned_dynamic(unsigned) const = 0;
protected:
unsigned e_phnum; /* Program header table entry count */
char *file_image; // if ET_DYN investigation
char const *dynstr; // from DT_STRTAB
@@ -72,6 +77,10 @@ protected:
unsigned sz_pack2; // after pack2(), before loader
unsigned lg2_page; // log2(PAGE_SIZE)
unsigned page_size; // 1u<<lg2_page
unsigned xct_off; // shared library: file offset of SHT_EXECINSTR
unsigned xct_va; // minimum SHT_EXECINSTR virtual address
unsigned hatch_off; // file offset of escape hatch
unsigned hatch_va; // virtual address of escape hatch
unsigned short e_machine;
unsigned char ei_class;
@@ -122,12 +131,12 @@ protected:
static unsigned elf_hash(char const *) /*const*/;
static unsigned gnu_hash(char const *) /*const*/;
virtual void const *elf_find_dynamic(unsigned) const;
virtual unsigned elf_unsigned_dynamic(unsigned) const;
virtual Elf32_Sym const *elf_lookup(char const *) const;
virtual unsigned elf_get_offset_from_address(unsigned) const;
Elf32_Shdr const *elf_find_section_name(char const *) const;
Elf32_Shdr const *elf_find_section_type(unsigned) const;
void const *elf_find_dynamic(unsigned) const;
uint64_t elf_unsigned_dynamic(unsigned) const;
protected:
Elf32_Ehdr ehdri; // from input file
@@ -220,11 +229,17 @@ protected:
virtual unsigned find_LOAD_gap(Elf64_Phdr const *const phdri, unsigned const k,
unsigned const e_phnum);
virtual unsigned elf_get_offset_from_address(unsigned) const;
void const *elf_find_dynamic(unsigned) const;
uint64_t elf_unsigned_dynamic(unsigned) const;
protected:
Elf64_Ehdr ehdri; // from input file
Elf64_Phdr *phdri; // for input file
acc_uint64l_t page_mask; // AND clears the offset-within-page
Elf64_Dyn const *dynseg; // from PT_DYNAMIC
__packed_struct(cprElfHdr1)
Elf64_Ehdr ehdr;
Elf64_Phdr phdr[1];
@@ -259,21 +274,30 @@ class PackLinuxElf32Be : public PackLinuxElf32
{
typedef PackLinuxElf32 super;
protected:
PackLinuxElf32Be(InputFile *f) : super(f) { bele = &N_BELE_RTP::be_policy; }
PackLinuxElf32Be(InputFile *f) : super(f) {
bele = &N_BELE_RTP::be_policy;
e_phnum = get_te16(&ehdri.e_phnum);
}
};
class PackLinuxElf32Le : public PackLinuxElf32
{
typedef PackLinuxElf32 super;
protected:
PackLinuxElf32Le(InputFile *f) : super(f) { bele = &N_BELE_RTP::le_policy; }
PackLinuxElf32Le(InputFile *f) : super(f) {
bele = &N_BELE_RTP::le_policy;
e_phnum = get_te16(&ehdri.e_phnum);
}
};
class PackLinuxElf64Le : public PackLinuxElf64
{
typedef PackLinuxElf64 super;
protected:
PackLinuxElf64Le(InputFile *f) : super(f) { bele = &N_BELE_RTP::le_policy; }
PackLinuxElf64Le(InputFile *f) : super(f) {
bele = &N_BELE_RTP::le_policy;
e_phnum = get_te16(&ehdri.e_phnum);
}
};