iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/32: Simplify ELF_CORE_COPY_REGS

Browse Source 
GS is now always a user segment, so there is no difference between user
and kernel registers.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220325153953.162643-2-brgerst@gmail.com
This commit is contained in:
Brian Gerst 2022-03-25 11:39:50 -04:00 committed by Borislav Petkov
parent 3123109284
commit f5d9283ecb
1 changed files with 2 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/x86/include/asm/elf.h
View File

@ -116,7 +116,7 @@ extern unsigned int vdso32_enabled;
* now struct_user_regs, they are different)
*/
#define ELF_CORE_COPY_REGS_COMMON(pr_reg, regs) \
#define ELF_CORE_COPY_REGS(pr_reg, regs) \
do { \
pr_reg[0] = regs->bx; \
pr_reg[1] = regs->cx; \
@ -128,6 +128,7 @@ do { \
pr_reg[7] = regs->ds; \
pr_reg[8] = regs->es; \
pr_reg[9] = regs->fs; \
savesegment(gs, pr_reg[10]); \
pr_reg[11] = regs->orig_ax; \
pr_reg[12] = regs->ip; \
pr_reg[13] = regs->cs; \
@ -136,18 +137,6 @@ do { \
pr_reg[16] = regs->ss; \
} while (0);
#define ELF_CORE_COPY_REGS(pr_reg, regs) \
do { \
ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
pr_reg[10] = get_user_gs(regs); \
} while (0);
#define ELF_CORE_COPY_KERNEL_REGS(pr_reg, regs) \
do { \
ELF_CORE_COPY_REGS_COMMON(pr_reg, regs);\
savesegment(gs, pr_reg[10]); \
} while (0);
#define ELF_PLATFORM (utsname()->machine)
#define set_personality_64bit() do { } while (0)