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197aa0d465
This change introduces support for Linux-style uc_context manipulation that's fast and works well on all supported OSes and architectures. It also integrates with the Cosmpolitan runtime which can show backtraces comprised of multiple stacks and fibers. See the test and example code for further details. This will be used by Mold once it's been vendored
38 lines
950 B
C
38 lines
950 B
C
#ifndef COSMOPOLITAN_LIBC_CALLS_STRUCT_UCONTEXT_INTERNAL_H_
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#define COSMOPOLITAN_LIBC_CALLS_STRUCT_UCONTEXT_INTERNAL_H_
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#include "libc/calls/ucontext.h"
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#include "libc/nt/struct/context.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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#ifdef __x86_64__
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#define PC rip
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#define SP rsp
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#define BP rbp
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#define ARG0 rdi
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#define ARG1 rsi
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#define ARG2 rdx
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#define ARG3 rcx
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#define ARG4 r8
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#define ARG5 r9
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#elif defined(__aarch64__)
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#define PC pc
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#define SP sp
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#define BP regs[29]
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#define ARG0 regs[0]
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#define ARG1 regs[1]
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#define ARG2 regs[2]
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#define ARG3 regs[3]
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#define ARG4 regs[4]
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#define ARG5 regs[5]
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#else
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#error "unsupported architecture"
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#endif
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void _ntcontext2linux(struct ucontext *, const struct NtContext *) _Hide;
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void _ntlinux2context(struct NtContext *, const ucontext_t *) _Hide;
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_CALLS_STRUCT_UCONTEXT_INTERNAL_H_ */
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