Update Linux to v5.10.109
Sourced from [1]
[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz
Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index ba8f19b..b81bc96 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -19,6 +19,7 @@
#include <linux/kasan.h>
#include <linux/moduleloader.h>
#include <linux/bug.h>
+#include <linux/memory.h>
#include <asm/alternative.h>
#include <asm/nospec-branch.h>
#include <asm/facility.h>
@@ -29,7 +30,7 @@
#define DEBUGP(fmt , ...)
#endif
-#define PLT_ENTRY_SIZE 20
+#define PLT_ENTRY_SIZE 22
void *module_alloc(unsigned long size)
{
@@ -174,10 +175,12 @@
}
static int apply_rela_bits(Elf_Addr loc, Elf_Addr val,
- int sign, int bits, int shift)
+ int sign, int bits, int shift,
+ void *(*write)(void *dest, const void *src, size_t len))
{
unsigned long umax;
long min, max;
+ void *dest = (void *)loc;
if (val & ((1UL << shift) - 1))
return -ENOEXEC;
@@ -194,26 +197,33 @@
return -ENOEXEC;
}
- if (bits == 8)
- *(unsigned char *) loc = val;
- else if (bits == 12)
- *(unsigned short *) loc = (val & 0xfff) |
+ if (bits == 8) {
+ unsigned char tmp = val;
+ write(dest, &tmp, 1);
+ } else if (bits == 12) {
+ unsigned short tmp = (val & 0xfff) |
(*(unsigned short *) loc & 0xf000);
- else if (bits == 16)
- *(unsigned short *) loc = val;
- else if (bits == 20)
- *(unsigned int *) loc = (val & 0xfff) << 16 |
- (val & 0xff000) >> 4 |
- (*(unsigned int *) loc & 0xf00000ff);
- else if (bits == 32)
- *(unsigned int *) loc = val;
- else if (bits == 64)
- *(unsigned long *) loc = val;
+ write(dest, &tmp, 2);
+ } else if (bits == 16) {
+ unsigned short tmp = val;
+ write(dest, &tmp, 2);
+ } else if (bits == 20) {
+ unsigned int tmp = (val & 0xfff) << 16 |
+ (val & 0xff000) >> 4 | (*(unsigned int *) loc & 0xf00000ff);
+ write(dest, &tmp, 4);
+ } else if (bits == 32) {
+ unsigned int tmp = val;
+ write(dest, &tmp, 4);
+ } else if (bits == 64) {
+ unsigned long tmp = val;
+ write(dest, &tmp, 8);
+ }
return 0;
}
static int apply_rela(Elf_Rela *rela, Elf_Addr base, Elf_Sym *symtab,
- const char *strtab, struct module *me)
+ const char *strtab, struct module *me,
+ void *(*write)(void *dest, const void *src, size_t len))
{
struct mod_arch_syminfo *info;
Elf_Addr loc, val;
@@ -241,17 +251,17 @@
case R_390_64: /* Direct 64 bit. */
val += rela->r_addend;
if (r_type == R_390_8)
- rc = apply_rela_bits(loc, val, 0, 8, 0);
+ rc = apply_rela_bits(loc, val, 0, 8, 0, write);
else if (r_type == R_390_12)
- rc = apply_rela_bits(loc, val, 0, 12, 0);
+ rc = apply_rela_bits(loc, val, 0, 12, 0, write);
else if (r_type == R_390_16)
- rc = apply_rela_bits(loc, val, 0, 16, 0);
+ rc = apply_rela_bits(loc, val, 0, 16, 0, write);
else if (r_type == R_390_20)
- rc = apply_rela_bits(loc, val, 1, 20, 0);
+ rc = apply_rela_bits(loc, val, 1, 20, 0, write);
else if (r_type == R_390_32)
- rc = apply_rela_bits(loc, val, 0, 32, 0);
+ rc = apply_rela_bits(loc, val, 0, 32, 0, write);
else if (r_type == R_390_64)
- rc = apply_rela_bits(loc, val, 0, 64, 0);
+ rc = apply_rela_bits(loc, val, 0, 64, 0, write);
break;
case R_390_PC16: /* PC relative 16 bit. */
case R_390_PC16DBL: /* PC relative 16 bit shifted by 1. */
@@ -260,15 +270,15 @@
case R_390_PC64: /* PC relative 64 bit. */
val += rela->r_addend - loc;
if (r_type == R_390_PC16)
- rc = apply_rela_bits(loc, val, 1, 16, 0);
+ rc = apply_rela_bits(loc, val, 1, 16, 0, write);
else if (r_type == R_390_PC16DBL)
- rc = apply_rela_bits(loc, val, 1, 16, 1);
+ rc = apply_rela_bits(loc, val, 1, 16, 1, write);
else if (r_type == R_390_PC32DBL)
- rc = apply_rela_bits(loc, val, 1, 32, 1);
+ rc = apply_rela_bits(loc, val, 1, 32, 1, write);
else if (r_type == R_390_PC32)
- rc = apply_rela_bits(loc, val, 1, 32, 0);
+ rc = apply_rela_bits(loc, val, 1, 32, 0, write);
else if (r_type == R_390_PC64)
- rc = apply_rela_bits(loc, val, 1, 64, 0);
+ rc = apply_rela_bits(loc, val, 1, 64, 0, write);
break;
case R_390_GOT12: /* 12 bit GOT offset. */
case R_390_GOT16: /* 16 bit GOT offset. */
@@ -283,33 +293,33 @@
case R_390_GOTPLT64: /* 64 bit offset to jump slot. */
case R_390_GOTPLTENT: /* 32 bit rel. offset to jump slot >> 1. */
if (info->got_initialized == 0) {
- Elf_Addr *gotent;
+ Elf_Addr *gotent = me->core_layout.base +
+ me->arch.got_offset +
+ info->got_offset;
- gotent = me->core_layout.base + me->arch.got_offset +
- info->got_offset;
- *gotent = val;
+ write(gotent, &val, sizeof(*gotent));
info->got_initialized = 1;
}
val = info->got_offset + rela->r_addend;
if (r_type == R_390_GOT12 ||
r_type == R_390_GOTPLT12)
- rc = apply_rela_bits(loc, val, 0, 12, 0);
+ rc = apply_rela_bits(loc, val, 0, 12, 0, write);
else if (r_type == R_390_GOT16 ||
r_type == R_390_GOTPLT16)
- rc = apply_rela_bits(loc, val, 0, 16, 0);
+ rc = apply_rela_bits(loc, val, 0, 16, 0, write);
else if (r_type == R_390_GOT20 ||
r_type == R_390_GOTPLT20)
- rc = apply_rela_bits(loc, val, 1, 20, 0);
+ rc = apply_rela_bits(loc, val, 1, 20, 0, write);
else if (r_type == R_390_GOT32 ||
r_type == R_390_GOTPLT32)
- rc = apply_rela_bits(loc, val, 0, 32, 0);
+ rc = apply_rela_bits(loc, val, 0, 32, 0, write);
else if (r_type == R_390_GOT64 ||
r_type == R_390_GOTPLT64)
- rc = apply_rela_bits(loc, val, 0, 64, 0);
+ rc = apply_rela_bits(loc, val, 0, 64, 0, write);
else if (r_type == R_390_GOTENT ||
r_type == R_390_GOTPLTENT) {
val += (Elf_Addr) me->core_layout.base - loc;
- rc = apply_rela_bits(loc, val, 1, 32, 1);
+ rc = apply_rela_bits(loc, val, 1, 32, 1, write);
}
break;
case R_390_PLT16DBL: /* 16 bit PC rel. PLT shifted by 1. */
@@ -320,25 +330,28 @@
case R_390_PLTOFF32: /* 32 bit offset from GOT to PLT. */
case R_390_PLTOFF64: /* 16 bit offset from GOT to PLT. */
if (info->plt_initialized == 0) {
- unsigned int *ip;
- ip = me->core_layout.base + me->arch.plt_offset +
- info->plt_offset;
- ip[0] = 0x0d10e310; /* basr 1,0 */
- ip[1] = 0x100a0004; /* lg 1,10(1) */
+ unsigned char insn[PLT_ENTRY_SIZE];
+ char *plt_base;
+ char *ip;
+
+ plt_base = me->core_layout.base + me->arch.plt_offset;
+ ip = plt_base + info->plt_offset;
+ *(int *)insn = 0x0d10e310; /* basr 1,0 */
+ *(int *)&insn[4] = 0x100c0004; /* lg 1,12(1) */
if (IS_ENABLED(CONFIG_EXPOLINE) && !nospec_disable) {
- unsigned int *ij;
- ij = me->core_layout.base +
- me->arch.plt_offset +
- me->arch.plt_size - PLT_ENTRY_SIZE;
- ip[2] = 0xa7f40000 + /* j __jump_r1 */
- (unsigned int)(u16)
- (((unsigned long) ij - 8 -
- (unsigned long) ip) / 2);
+ char *jump_r1;
+
+ jump_r1 = plt_base + me->arch.plt_size -
+ PLT_ENTRY_SIZE;
+ /* brcl 0xf,__jump_r1 */
+ *(short *)&insn[8] = 0xc0f4;
+ *(int *)&insn[10] = (jump_r1 - (ip + 8)) / 2;
} else {
- ip[2] = 0x07f10000; /* br %r1 */
+ *(int *)&insn[8] = 0x07f10000; /* br %r1 */
}
- ip[3] = (unsigned int) (val >> 32);
- ip[4] = (unsigned int) val;
+ *(long *)&insn[14] = val;
+
+ write(ip, insn, sizeof(insn));
info->plt_initialized = 1;
}
if (r_type == R_390_PLTOFF16 ||
@@ -357,17 +370,17 @@
val += rela->r_addend - loc;
}
if (r_type == R_390_PLT16DBL)
- rc = apply_rela_bits(loc, val, 1, 16, 1);
+ rc = apply_rela_bits(loc, val, 1, 16, 1, write);
else if (r_type == R_390_PLTOFF16)
- rc = apply_rela_bits(loc, val, 0, 16, 0);
+ rc = apply_rela_bits(loc, val, 0, 16, 0, write);
else if (r_type == R_390_PLT32DBL)
- rc = apply_rela_bits(loc, val, 1, 32, 1);
+ rc = apply_rela_bits(loc, val, 1, 32, 1, write);
else if (r_type == R_390_PLT32 ||
r_type == R_390_PLTOFF32)
- rc = apply_rela_bits(loc, val, 0, 32, 0);
+ rc = apply_rela_bits(loc, val, 0, 32, 0, write);
else if (r_type == R_390_PLT64 ||
r_type == R_390_PLTOFF64)
- rc = apply_rela_bits(loc, val, 0, 64, 0);
+ rc = apply_rela_bits(loc, val, 0, 64, 0, write);
break;
case R_390_GOTOFF16: /* 16 bit offset to GOT. */
case R_390_GOTOFF32: /* 32 bit offset to GOT. */
@@ -375,20 +388,20 @@
val = val + rela->r_addend -
((Elf_Addr) me->core_layout.base + me->arch.got_offset);
if (r_type == R_390_GOTOFF16)
- rc = apply_rela_bits(loc, val, 0, 16, 0);
+ rc = apply_rela_bits(loc, val, 0, 16, 0, write);
else if (r_type == R_390_GOTOFF32)
- rc = apply_rela_bits(loc, val, 0, 32, 0);
+ rc = apply_rela_bits(loc, val, 0, 32, 0, write);
else if (r_type == R_390_GOTOFF64)
- rc = apply_rela_bits(loc, val, 0, 64, 0);
+ rc = apply_rela_bits(loc, val, 0, 64, 0, write);
break;
case R_390_GOTPC: /* 32 bit PC relative offset to GOT. */
case R_390_GOTPCDBL: /* 32 bit PC rel. off. to GOT shifted by 1. */
val = (Elf_Addr) me->core_layout.base + me->arch.got_offset +
rela->r_addend - loc;
if (r_type == R_390_GOTPC)
- rc = apply_rela_bits(loc, val, 1, 32, 0);
+ rc = apply_rela_bits(loc, val, 1, 32, 0, write);
else if (r_type == R_390_GOTPCDBL)
- rc = apply_rela_bits(loc, val, 1, 32, 1);
+ rc = apply_rela_bits(loc, val, 1, 32, 1, write);
break;
case R_390_COPY:
case R_390_GLOB_DAT: /* Create GOT entry. */
@@ -412,9 +425,10 @@
return 0;
}
-int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
+static int __apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
unsigned int symindex, unsigned int relsec,
- struct module *me)
+ struct module *me,
+ void *(*write)(void *dest, const void *src, size_t len))
{
Elf_Addr base;
Elf_Sym *symtab;
@@ -430,13 +444,27 @@
n = sechdrs[relsec].sh_size / sizeof(Elf_Rela);
for (i = 0; i < n; i++, rela++) {
- rc = apply_rela(rela, base, symtab, strtab, me);
+ rc = apply_rela(rela, base, symtab, strtab, me, write);
if (rc)
return rc;
}
return 0;
}
+int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
+ unsigned int symindex, unsigned int relsec,
+ struct module *me)
+{
+ bool early = me->state == MODULE_STATE_UNFORMED;
+ void *(*write)(void *, const void *, size_t) = memcpy;
+
+ if (!early)
+ write = s390_kernel_write;
+
+ return __apply_relocate_add(sechdrs, strtab, symindex, relsec, me,
+ write);
+}
+
int module_finalize(const Elf_Ehdr *hdr,
const Elf_Shdr *sechdrs,
struct module *me)