AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-03 05:46:42 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

powerpc: Make kernel module helper endian-safe.

Browse Source 
Signed-off-by: Eugene Surovegin <surovegin@google.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Eugene Surovegin 2013-09-20 11:42:20 -07:00 committed by Benjamin Herrenschmidt
parent dbd0c5d529
commit fed8393ef9
1 changed files with 16 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/powerpc/kernel/module_64.c
View File

@ -62,6 +62,16 @@ struct ppc64_stub_entry
r2) into the stub. */
static struct ppc64_stub_entry ppc64_stub =
{ .jump = {
#ifdef __LITTLE_ENDIAN__
0x00, 0x00, 0x82, 0x3d, /* addis r12,r2, <high> */
0x00, 0x00, 0x8c, 0x39, /* addi r12,r12, <low> */
/* Save current r2 value in magic place on the stack. */
0x28, 0x00, 0x41, 0xf8, /* std r2,40(r1) */
0x20, 0x00, 0x6c, 0xe9, /* ld r11,32(r12) */
0x28, 0x00, 0x4c, 0xe8, /* ld r2,40(r12) */
0xa6, 0x03, 0x69, 0x7d, /* mtctr r11 */
0x20, 0x04, 0x80, 0x4e /* bctr */
#else
0x3d, 0x82, 0x00, 0x00, /* addis r12,r2, <high> */
0x39, 0x8c, 0x00, 0x00, /* addi r12,r12, <low> */
/* Save current r2 value in magic place on the stack. */
@ -70,6 +80,7 @@ static struct ppc64_stub_entry ppc64_stub =
0xe8, 0x4c, 0x00, 0x28, /* ld r2,40(r12) */
0x7d, 0x69, 0x03, 0xa6, /* mtctr r11 */
0x4e, 0x80, 0x04, 0x20 /* bctr */
#endif
} };
/* Count how many different 24-bit relocations (different symbol,
@ -269,8 +280,13 @@ static inline int create_stub(Elf64_Shdr *sechdrs,
*entry = ppc64_stub;
#ifdef __LITTLE_ENDIAN__
loc1 = (Elf64_Half *)&entry->jump[0];
loc2 = (Elf64_Half *)&entry->jump[4];
#else
loc1 = (Elf64_Half *)&entry->jump[2];
loc2 = (Elf64_Half *)&entry->jump[6];
#endif
/* Stub uses address relative to r2. */
reladdr = (unsigned long)entry - my_r2(sechdrs, me);