2019-08-14 10:47:11 +02:00
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#if defined(__i386__) && defined(__linux__)
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#include "sanitizer_common/sanitizer_asm.h"
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.comm _ZN14__interception10real_vforkE,4,4
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.globl ASM_WRAPPER_NAME(vfork)
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ASM_TYPE_FUNCTION(ASM_WRAPPER_NAME(vfork))
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ASM_WRAPPER_NAME(vfork):
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2021-10-06 19:24:24 +02:00
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_CET_ENDBR
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2019-08-14 10:47:11 +02:00
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// Store return address in the spill area and tear down the stack frame.
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sub $12, %esp
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call COMMON_INTERCEPTOR_SPILL_AREA
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mov 12(%esp), %ecx
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mov %ecx, (%eax)
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add $16, %esp
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call .L0$pb
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.L0$pb:
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pop %eax
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.Ltmp0:
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add $_GLOBAL_OFFSET_TABLE_+(.Ltmp0-.L0$pb), %eax
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call *_ZN14__interception10real_vforkE@GOTOFF(%eax)
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// Restore the stack frame.
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// 12(%esp) return address
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// 8(%esp) spill %ebx
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// 4(%esp) spill REAL(vfork) return value
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// (%esp) call frame (arg0) for __*_handle_vfork
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sub $16, %esp
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mov %ebx, 8(%esp)
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mov %eax, 4(%esp)
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// Form GOT address in %ebx.
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call .L1$pb
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.L1$pb:
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pop %ebx
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.Ltmp1:
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add $_GLOBAL_OFFSET_TABLE_+(.Ltmp1-.L1$pb), %ebx
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// Restore original return address.
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call COMMON_INTERCEPTOR_SPILL_AREA
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mov (%eax), %ecx
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mov %ecx, 12(%esp)
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mov 4(%esp), %eax
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// Call handle_vfork in the parent process (%rax != 0).
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test %eax, %eax
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je .L_exit
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lea 16(%esp), %ecx
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mov %ecx, (%esp)
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call COMMON_INTERCEPTOR_HANDLE_VFORK@PLT
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.L_exit:
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mov 4(%esp), %eax
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mov 8(%esp), %ebx
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add $12, %esp
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ret
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ASM_SIZE(vfork)
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.weak vfork
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.set vfork, ASM_WRAPPER_NAME(vfork)
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#endif
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