mirror of
https://github.com/RGBCube/serenity
synced 2025-05-23 17:45:07 +00:00
57fb027216
I think this is correct. The following registers are saved and restored: EBX, ESI, EDI, EBP, ESP and EIP.
33 lines
607 B
C++
33 lines
607 B
C++
#include <setjmp.h>
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#include <assert.h>
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#include <Kernel/Syscall.h>
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asm(
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"setjmp:\n\
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movl %ebx, 0(%eax)\n\
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movl %esi, 4(%eax)\n\
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movl %edi, 8(%eax)\n\
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movl %ebp, 12(%eax)\n\
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movl %esp, 16(%eax)\n\
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movl (%esp), %ecx\n\
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movl %ecx, 20(%eax)\n\
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xorl %eax, %eax\n\
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ret\n\
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");
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asm(
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"longjmp:\n\
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xchgl %edx, %eax\n\
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test %eax, %eax\n\
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jnz 1f\n\
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incl %eax\n\
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1:\n\
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mov 0(%edx), %ebx\n\
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mov 4(%edx), %esi\n\
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mov 8(%edx), %edi\n\
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mov 12(%edx), %ebp\n\
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mov 16(%edx), %ecx\n\
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mov %ecx, %esp\n\
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mov 20(%edx), %ecx\n\
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jmp *%ecx\n\
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");
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