summaryrefslogtreecommitdiff
path: root/toolchain/uClibc/patches-0.9.30.1/440-backport_mips_nonpic.patch
diff options
context:
space:
mode:
Diffstat (limited to 'toolchain/uClibc/patches-0.9.30.1/440-backport_mips_nonpic.patch')
-rw-r--r--toolchain/uClibc/patches-0.9.30.1/440-backport_mips_nonpic.patch289
1 files changed, 0 insertions, 289 deletions
diff --git a/toolchain/uClibc/patches-0.9.30.1/440-backport_mips_nonpic.patch b/toolchain/uClibc/patches-0.9.30.1/440-backport_mips_nonpic.patch
deleted file mode 100644
index abcd6ec..0000000
--- a/toolchain/uClibc/patches-0.9.30.1/440-backport_mips_nonpic.patch
+++ /dev/null
@@ -1,289 +0,0 @@
---- a/include/elf.h
-+++ b/include/elf.h
-@@ -1547,6 +1547,7 @@ typedef struct
- #define STO_MIPS_INTERNAL 0x1
- #define STO_MIPS_HIDDEN 0x2
- #define STO_MIPS_PROTECTED 0x3
-+#define STO_MIPS_PLT 0x8
- #define STO_MIPS_SC_ALIGN_UNUSED 0xff
-
- /* MIPS specific values for `st_info'. */
-@@ -1692,8 +1693,11 @@ typedef struct
- #define R_MIPS_TLS_TPREL64 48 /* TP-relative offset, 64 bit */
- #define R_MIPS_TLS_TPREL_HI16 49 /* TP-relative offset, high 16 bits */
- #define R_MIPS_TLS_TPREL_LO16 50 /* TP-relative offset, low 16 bits */
-+#define R_MIPS_GLOB_DAT 51
-+#define R_MIPS_COPY 126
-+#define R_MIPS_JUMP_SLOT 127
- /* Keep this the last entry. */
--#define R_MIPS_NUM 51
-+#define R_MIPS_NUM 128
-
- /* Legal values for p_type field of Elf32_Phdr. */
-
-@@ -1759,7 +1763,13 @@ typedef struct
- #define DT_MIPS_COMPACT_SIZE 0x7000002f /* (O32)Size of compact rel section. */
- #define DT_MIPS_GP_VALUE 0x70000030 /* GP value for aux GOTs. */
- #define DT_MIPS_AUX_DYNAMIC 0x70000031 /* Address of aux .dynamic. */
--#define DT_MIPS_NUM 0x32
-+/* The address of .got.plt in an executable using the new non-PIC ABI. */
-+#define DT_MIPS_PLTGOT 0x70000032
-+/* The base of the PLT in an executable using the new non-PIC ABI if that
-+ PLT is writable. For a non-writable PLT, this is omitted or has a zero
-+ value. */
-+#define DT_MIPS_RWPLT 0x70000034
-+#define DT_MIPS_NUM 0x35
-
- /* Legal values for DT_MIPS_FLAGS Elf32_Dyn entry. */
-
---- a/ldso/ldso/dl-hash.c
-+++ b/ldso/ldso/dl-hash.c
-@@ -160,6 +160,11 @@ check_match (const ElfW(Sym) *sym, char
- /* undefined symbol itself */
- return NULL;
-
-+#ifdef __mips__
-+ if (sym->st_shndx == SHN_UNDEF && !(sym->st_other & STO_MIPS_PLT))
-+ return NULL;
-+#endif
-+
- if (sym->st_value == 0)
- /* No value */
- return NULL;
---- a/ldso/ldso/mips/dl-sysdep.h
-+++ b/ldso/ldso/mips/dl-sysdep.h
-@@ -93,10 +93,11 @@ typedef struct
-
- #include <link.h>
-
--#define ARCH_NUM 3
-+#define ARCH_NUM 4
- #define DT_MIPS_GOTSYM_IDX (DT_NUM + OS_NUM)
- #define DT_MIPS_LOCAL_GOTNO_IDX (DT_NUM + OS_NUM +1)
- #define DT_MIPS_SYMTABNO_IDX (DT_NUM + OS_NUM +2)
-+#define DT_MIPS_PLTGOT_IDX (DT_NUM + OS_NUM +3)
-
- #define ARCH_DYNAMIC_INFO(dpnt, dynamic, debug_addr) \
- do { \
-@@ -106,6 +107,8 @@ else if (dpnt->d_tag == DT_MIPS_LOCAL_GO
- dynamic[DT_MIPS_LOCAL_GOTNO_IDX] = dpnt->d_un.d_val; \
- else if (dpnt->d_tag == DT_MIPS_SYMTABNO) \
- dynamic[DT_MIPS_SYMTABNO_IDX] = dpnt->d_un.d_val; \
-+else if (dpnt->d_tag == DT_MIPS_PLTGOT) \
-+ dynamic[DT_MIPS_PLTGOT_IDX] = dpnt->d_un.d_val; \
- else if (dpnt->d_tag == DT_MIPS_RLD_MAP) \
- *(ElfW(Addr) *)(dpnt->d_un.d_ptr) = (ElfW(Addr)) debug_addr; \
- } while (0)
-@@ -114,6 +117,7 @@ else if (dpnt->d_tag == DT_MIPS_RLD_MAP)
- #define INIT_GOT(GOT_BASE,MODULE) \
- do { \
- unsigned long idx; \
-+ unsigned long *pltgot; \
- \
- /* Check if this is the dynamic linker itself */ \
- if (MODULE->libtype == program_interpreter) \
-@@ -123,6 +127,12 @@ do { \
- GOT_BASE[0] = (unsigned long) _dl_runtime_resolve; \
- GOT_BASE[1] = (unsigned long) MODULE; \
- \
-+ pltgot = MODULE->dynamic_info[DT_MIPS_PLTGOT_IDX]; \
-+ if (pltgot) { \
-+ pltgot[0] = (unsigned long) _dl_runtime_pltresolve; \
-+ pltgot[1] = (unsigned long) MODULE; \
-+ } \
-+ \
- /* Add load address displacement to all local GOT entries */ \
- idx = 2; \
- while (idx < MODULE->dynamic_info[DT_MIPS_LOCAL_GOTNO_IDX]) \
-@@ -157,9 +167,9 @@ void _dl_perform_mips_global_got_relocat
- #define OFFS_ALIGN 0x7ffff000
- #endif /* O32 || N32 */
-
--#define elf_machine_type_class(type) ELF_RTYPE_CLASS_PLT
--/* MIPS does not have COPY relocs */
--#define DL_NO_COPY_RELOCS
-+#define elf_machine_type_class(type) \
-+ ((((type) == R_MIPS_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
-+ | (((type) == R_MIPS_COPY) * ELF_RTYPE_CLASS_COPY))
-
- #define OFFSET_GP_GOT 0x7ff0
-
---- a/ldso/ldso/mips/elfinterp.c
-+++ b/ldso/ldso/mips/elfinterp.c
-@@ -30,6 +30,7 @@
- #include "ldso.h"
-
- extern int _dl_runtime_resolve(void);
-+extern int _dl_runtime_pltresolve(void);
-
- #define OFFSET_GP_GOT 0x7ff0
-
-@@ -83,6 +84,61 @@ unsigned long __dl_runtime_resolve(unsig
- return new_addr;
- }
-
-+unsigned long
-+__dl_runtime_pltresolve(struct elf_resolve *tpnt, int reloc_entry)
-+{
-+ int reloc_type;
-+ ELF_RELOC *this_reloc;
-+ char *strtab;
-+ Elf32_Sym *symtab;
-+ int symtab_index;
-+ char *rel_addr;
-+ char *new_addr;
-+ char **got_addr;
-+ unsigned long instr_addr;
-+ char *symname;
-+
-+ rel_addr = (char *)tpnt->dynamic_info[DT_JMPREL];
-+ this_reloc = (ELF_RELOC *)(intptr_t)(rel_addr + reloc_entry);
-+ reloc_type = ELF32_R_TYPE(this_reloc->r_info);
-+ symtab_index = ELF32_R_SYM(this_reloc->r_info);
-+
-+ symtab = (Elf32_Sym *)(intptr_t)tpnt->dynamic_info[DT_SYMTAB];
-+ strtab = (char *)tpnt->dynamic_info[DT_STRTAB];
-+ symname = strtab + symtab[symtab_index].st_name;
-+
-+ /* Address of the jump instruction to fix up. */
-+ instr_addr = ((unsigned long)this_reloc->r_offset +
-+ (unsigned long)tpnt->loadaddr);
-+ got_addr = (char **)instr_addr;
-+
-+ /* Get the address of the GOT entry. */
-+ new_addr = _dl_find_hash(symname, tpnt->symbol_scope, tpnt, ELF_RTYPE_CLASS_PLT);
-+ if (unlikely(!new_addr)) {
-+ _dl_dprintf(2, "%s: can't resolve symbol '%s' in lib '%s'.\n", _dl_progname, symname, tpnt->libname);
-+ _dl_exit(1);
-+ }
-+
-+#if defined (__SUPPORT_LD_DEBUG__)
-+ if ((unsigned long)got_addr < 0x40000000) {
-+ if (_dl_debug_bindings) {
-+ _dl_dprintf(_dl_debug_file, "\nresolve function: %s", symname);
-+ if (_dl_debug_detail)
-+ _dl_dprintf(_dl_debug_file,
-+ "\n\tpatched: %x ==> %x @ %x",
-+ *got_addr, new_addr, got_addr);
-+ }
-+ }
-+ if (!_dl_debug_nofixups) {
-+ *got_addr = new_addr;
-+ }
-+#else
-+ *got_addr = new_addr;
-+#endif
-+
-+ return (unsigned long)new_addr;
-+}
-+
- void _dl_parse_lazy_relocation_information(struct dyn_elf *rpnt,
- unsigned long rel_addr, unsigned long rel_size)
- {
-@@ -115,6 +171,7 @@ int _dl_parse_relocation_information(str
- got = (unsigned long *) tpnt->dynamic_info[DT_PLTGOT];
-
- for (i = 0; i < rel_size; i++, rpnt++) {
-+ char *symname = NULL;
- reloc_addr = (unsigned long *) (tpnt->loadaddr +
- (unsigned long) rpnt->r_offset);
- reloc_type = ELF_R_TYPE(rpnt->r_info);
-@@ -128,6 +185,16 @@ int _dl_parse_relocation_information(str
- old_val = *reloc_addr;
- #endif
-
-+ if (reloc_type == R_MIPS_JUMP_SLOT || reloc_type == R_MIPS_COPY) {
-+ symname = strtab + symtab[symtab_index].st_name;
-+ symbol_addr = (unsigned long)_dl_find_hash(symname,
-+ tpnt->symbol_scope,
-+ tpnt,
-+ elf_machine_type_class(reloc_type));
-+ if (unlikely(!symbol_addr && ELF32_ST_BIND(symtab[symtab_index].st_info) != STB_WEAK))
-+ return 1;
-+ }
-+
- switch (reloc_type) {
- #if _MIPS_SIM == _MIPS_SIM_ABI64
- case (R_MIPS_64 << 8) | R_MIPS_REL32:
-@@ -148,6 +215,24 @@ int _dl_parse_relocation_information(str
- *reloc_addr += (unsigned long) tpnt->loadaddr;
- }
- break;
-+ case R_MIPS_JUMP_SLOT:
-+ *reloc_addr = symbol_addr;
-+ break;
-+ case R_MIPS_COPY:
-+ if (symbol_addr) {
-+#if defined (__SUPPORT_LD_DEBUG__)
-+ if (_dl_debug_move)
-+ _dl_dprintf(_dl_debug_file,
-+ "\n%s move %d bytes from %x to %x",
-+ symname, symtab[symtab_index].st_size,
-+ symbol_addr, reloc_addr);
-+#endif
-+
-+ _dl_memcpy((char *)reloc_addr,
-+ (char *)symbol_addr,
-+ symtab[symtab_index].st_size);
-+ }
-+ break;
- case R_MIPS_NONE:
- break;
- default:
---- a/ldso/ldso/mips/resolve.S
-+++ b/ldso/ldso/mips/resolve.S
-@@ -112,3 +112,54 @@ _dl_runtime_resolve:
- .end _dl_runtime_resolve
- .previous
-
-+/* Assembler veneer called from the PLT header code when using the
-+ non-PIC ABI.
-+
-+ Code in each PLT entry puts the caller's return address into t7 ($15),
-+ the PLT entry index into t8 ($24), the address of _dl_runtime_pltresolve
-+ into t9 ($25) and the address of .got.plt into gp ($28). __dl_runtime_pltresolve
-+ needs a0 ($4) to hold the link map and a1 ($5) to hold the index into
-+ .rel.plt (== PLT entry index * 4). */
-+
-+ .text
-+ .align 2
-+ .globl _dl_runtime_pltresolve
-+ .type _dl_runtime_pltresolve,@function
-+ .ent _dl_runtime_pltresolve
-+_dl_runtime_pltresolve:
-+ .frame $29, 40, $31
-+ .set noreorder
-+ # Save arguments and sp value in stack.
-+ subu $29, 40
-+ lw $10, 4($28)
-+ # Modify t9 ($25) so as to point .cpload instruction.
-+ addiu $25, 12
-+ # Compute GP.
-+ .cpload $25
-+ .set reorder
-+
-+ /* Store function arguments from registers to stack */
-+ sw $15, 36($29)
-+ sw $4, 16($29)
-+ sw $5, 20($29)
-+ sw $6, 24($29)
-+ sw $7, 28($29)
-+
-+ /* Setup functions args and call __dl_runtime_pltresolve. */
-+ move $4, $10
-+ sll $5, $24, 3
-+ jal __dl_runtime_pltresolve
-+
-+ /* Restore function arguments from stack to registers */
-+ lw $31, 36($29)
-+ lw $4, 16($29)
-+ lw $5, 20($29)
-+ lw $6, 24($29)
-+ lw $7, 28($29)
-+
-+ /* Do a tail call to the original function */
-+ addiu $29, 40
-+ move $25, $2
-+ jr $25
-+ .end _dl_runtime_pltresolve
-+ .previous
generated by cgit v1.1 at 2024-12-18 17:47:35 +0000