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LibC: Save callee saved registers on setjmp

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Bananymous
2025-05-04 13:54:35 +03:00
parent d457e6ad6a
commit 82f4975f45
4 changed files with 43 additions and 11 deletions
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15
userspace/libraries/LibC/arch/i686/setjmp.S
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@@ -1,3 +1,5 @@
// jmp_buf: esp, eip, ebx, ebp, edi, esi
// int setjmp(jmp_buf env)
.global setjmp
setjmp:
@@ -9,6 +11,11 @@ setjmp:
movl (%esp), %eax
movl %eax, 4(%edx)
movl %ebx, 8(%edx)
movl %ebp, 12(%edx)
movl %edi, 16(%edx)
movl %esi, 20(%edx)
xorl %eax, %eax
ret
@@ -25,8 +32,12 @@ longjmp:
testl %ecx, %ecx
cmovnzl %ecx, %eax
movl 0(%edx), %esp
movl 4(%edx), %ecx
movl 0(%edx), %esp
movl 4(%edx), %ecx
movl 8(%edx), %ebx
movl 12(%edx), %ebp
movl 16(%edx), %edi
movl 20(%edx), %esi
jmp *%ecx
.size longjmp, . - longjmp