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This commit is contained in:
Marvin
2026-09-16 04:37:37 +02:00
parent e71245c082
commit 3e9bdf72c9
74 changed files with 555 additions and 567 deletions
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arch/x86_64/usercopy.c
+9 -9
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@@ -17,7 +17,7 @@ bool arch_usercopy_read(void* dst, const __user void* src, size_t len, struct us
// Setup regs for `rep movsb`.
"xchg rcx, rdx\n"
"mov rax, [rip + %0]\n"
"mov [rdx], rax\n"
"xchg [rdx], rax\n"
".global x86_64_read_start\n"
"x86_64_read_start:\n"
@@ -26,7 +26,7 @@ bool arch_usercopy_read(void* dst, const __user void* src, size_t len, struct us
".global x86_64_read_end\n"
"x86_64_read_end:\n"
"xor rax, rax\n"
"mov [rdx], rax\n"
"xchg [rdx], rax\n"
"mov rax, 1\n"
"clac\n"
"ret\n"
@@ -34,7 +34,7 @@ bool arch_usercopy_read(void* dst, const __user void* src, size_t len, struct us
".global x86_64_read_fault\n"
"x86_64_read_fault:\n"
"xor rax, rax\n"
"mov [rdx], rax\n"
"xchg [rdx], rax\n"
"clac\n"
"ret\n"
:
@@ -69,7 +69,7 @@ bool arch_usercopy_write(__user void* dst, const void* src, size_t len, struct u
".global x86_64_write_end\n"
"x86_64_write_end:\n"
"xor rax, rax\n"
"mov [rdx], rax\n"
"xchg [rdx], rax\n"
"mov rax, 1\n"
"clac\n"
"ret\n"
@@ -77,11 +77,11 @@ bool arch_usercopy_write(__user void* dst, const void* src, size_t len, struct u
".global x86_64_write_fault\n"
"x86_64_write_fault:\n"
"xor rax, rax\n"
"mov [rdx], rax\n"
"xchg [rdx], rax\n"
"clac\n"
"ret\n"
:
: "i"(&read_region)
: "i"(&write_region)
: "memory"
);
return false;
@@ -102,7 +102,7 @@ bool arch_usercopy_strlen(const __user char* str, size_t max, size_t* len, struc
asm volatile(
"stac\n"
"mov rax, [rip + %0]\n"
"mov [rcx], rax\n"
"xchg [rcx], rax\n"
".global x86_64_strlen_start\n"
"x86_64_strlen_start:\n"
@@ -119,7 +119,7 @@ bool arch_usercopy_strlen(const __user char* str, size_t max, size_t* len, struc
".global x86_64_strlen_end\n"
"x86_64_strlen_end:\n"
"xor rax, rax\n"
"mov [rcx], rax\n"
"xchg [rcx], rax\n"
"mov rax, 1\n"
"clac\n"
"ret\n"
@@ -127,7 +127,7 @@ bool arch_usercopy_strlen(const __user char* str, size_t max, size_t* len, struc
".global x86_64_strlen_fault\n"
"x86_64_strlen_fault:\n"
"xor rax, rax\n"
"mov [rcx], rax\n"
"xchg [rcx], rax\n"
"clac\n"
"ret\n"
: