LibC: Save callee saved registers on setjmp

2025-05-04 13:54:35 +03:00
parent d457e6ad6a
commit 82f4975f45
4 changed files with 43 additions and 11 deletions
--- a/userspace/libraries/LibC/include/setjmp.h
+++ b/userspace/libraries/LibC/include/setjmp.h
@@ -7,8 +7,14 @@

 __BEGIN_DECLS

-typedef long jmp_buf[2];
-typedef long sigjmp_buf[2 + 1 + (sizeof(long long) / sizeof(long))];
+#if defined(__x86_64__)
+#define _JMP_BUF_REGS 8 // rsp, rip, rbx, rbp, r12-r15
+#elif defined(__i686__)
+#define _JMP_BUF_REGS 6 // esp, eip, ebx, ebp, edi, esi
+#endif
+
+typedef long jmp_buf[_JMP_BUF_REGS];
+typedef long sigjmp_buf[_JMP_BUF_REGS + 1 + (sizeof(long long) / sizeof(long))];

 #define _longjmp longjmp
 void longjmp(jmp_buf env, int val);