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linux syscall trashes rcx & r11

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Lucia Ceionia
2025-12-04 01:02:29 -06:00
parent 28d44f2bbf
commit 511bf09d65
1 changed files with 3 additions and 1 deletions
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4
lib.h
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@@ -13,7 +13,9 @@ static
void write(uint64_t fileno, void *buffer, size_t len) { void write(uint64_t fileno, void *buffer, size_t len) {
uint64_t a,d; uint64_t a,d;
asm volatile("syscall" asm volatile("syscall"
:"=a"(a),"=d"(d):"a"(SYS_write),"D"(fileno),"S"(buffer),"d"(len):"memory"); :"=a"(a),"=d"(d)
:"a"(SYS_write),"D"(fileno),"S"(buffer),"d"(len)
:"cc","memory","%rcx","%r11");
} }
[[noreturn]] static [[noreturn]] static