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Use caller-saved register in x86-32 block trampoline. #429

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Merged
davidchisnall merged 1 commit into from
Oct 8, 2026
Merged

Use caller-saved register in x86-32 block trampoline. #429

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8 changes: 4 additions & 4 deletions block_trampolines.S
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Original file line number Diff line number Diff line change
Expand Up @@ -60,10 +60,10 @@
call 1f # Store the instruction pointer on the stack
1:
pop %eax # Load the old instruction pointer
mov \arg0(%esp), %ebx # Load the self parameter
mov %ebx, \arg1(%esp) # Store self as the second argument
mov -0x1005(%eax), %ebx # Load the block pointer to %ebx
mov %ebx, \arg0(%esp) # Store the block pointer in the first argument
mov \arg0(%esp), %ecx # Load the self parameter
mov %ecx, \arg1(%esp) # Store self as the second argument
mov -0x1005(%eax), %ecx # Load the block pointer to %ecx
mov %ecx, \arg0(%esp) # Store the block pointer in the first argument
jmp *-0x1001(%eax) # Call the block function
.endm
// All arguments on i386 are passed on the stack. These values are stack
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