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This commit is contained in:
Aleksey Samoilov 2024-06-15 00:14:03 +04:00
parent 60e35759c4
commit c8c96bb933
Signed by: Sunderland93
GPG key ID: D3E730685C28F1FB
1 changed files with 11 additions and 11 deletions
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22
debian/patches/features/x86/x86-make-x32-syscall-support-conditional.patch vendored
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@ -29,7 +29,7 @@ Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5768,6 +5768,10 @@
@@ -6160,6 +6160,10 @@
later by a loaded module cannot be set this way.
Example: sysctl.vm.swappiness=40
@ -42,7 +42,7 @@ Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
on older distributions. When this option is enabled
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2865,6 +2865,14 @@ config COMPAT_32
@@ -2997,6 +2997,14 @@ config COMPAT_32
select HAVE_UID16
select OLD_SIGSUSPEND3
@ -59,14 +59,14 @@ Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
depends on IA32_EMULATION || X86_X32_ABI
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -62,7 +62,7 @@ static __always_inline bool do_syscall_x
@@ -63,7 +63,7 @@ static __always_inline bool do_syscall_x
*/
unsigned int xnr = nr - __X32_SYSCALL_BIT;
- if (IS_ENABLED(CONFIG_X86_X32_ABI) && likely(xnr < X32_NR_syscalls)) {
+ if (IS_ENABLED(CONFIG_X86_X32_ABI) && unlikely(x32_enabled) && likely(xnr < X32_NR_syscalls)) {
xnr = array_index_nospec(xnr, X32_NR_syscalls);
regs->ax = x32_sys_call_table[xnr](regs);
regs->ax = x32_sys_call(regs, xnr);
return true;
--- a/arch/x86/entry/syscall_x32.c
+++ b/arch/x86/entry/syscall_x32.c
@ -80,9 +80,9 @@ Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
#include <linux/syscalls.h>
#include <asm/syscall.h>
@@ -16,3 +19,46 @@
asmlinkage const sys_call_ptr_t x32_sys_call_table[] = {
#include <asm/syscalls_x32.h>
@@ -20,3 +23,46 @@ long x32_sys_call(const struct pt_regs *
default: return __x64_sys_ni_syscall(regs);
}
};
+
+/* Maybe enable x32 syscalls */
@ -139,7 +139,7 @@ Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
typedef unsigned long elf_greg_t;
@@ -161,7 +164,8 @@ do { \
@@ -150,7 +153,8 @@ do { \
#define compat_elf_check_arch(x) \
(elf_check_arch_ia32(x) || \
@ -159,9 +159,9 @@ Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
#include <asm/thread_info.h> /* for TS_COMPAT */
#include <asm/unistd.h>
@@ -30,6 +31,18 @@ extern const sys_call_ptr_t ia32_sys_cal
extern const sys_call_ptr_t x32_sys_call_table[];
#endif
@@ -28,6 +29,18 @@ extern long ia32_sys_call(const struct p
extern long x32_sys_call(const struct pt_regs *, unsigned int nr);
extern long x64_sys_call(const struct pt_regs *, unsigned int nr);
+#if defined(CONFIG_X86_X32_ABI)
+#if defined(CONFIG_X86_X32_DISABLED)