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https://github.com/Mathewnd/Astral.git
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Matheus
141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
#ifndef _ARCH_SIGNAL_H
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#define _ARCH_SIGNAL_H
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#include <kernel/signal.h>
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#define ARCH_SIGNAL_STACK_GROWS_DOWNWARDS 1
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#define ARCH_SIGNAL_REDZONE_SIZE 128
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#define ARCH_SIGNAL_SYSCALL_INSTRUCTION_SIZE 2
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#define ARCH_SIGNAL_GETFROMRETURN(x)
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#define MCONTEXT_REG_R8 0
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#define MCONTEXT_REG_R9 1
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#define MCONTEXT_REG_R10 2
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#define MCONTEXT_REG_R11 3
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#define MCONTEXT_REG_R12 4
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#define MCONTEXT_REG_R13 5
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#define MCONTEXT_REG_R14 6
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#define MCONTEXT_REG_R15 7
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#define MCONTEXT_REG_RDI 8
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#define MCONTEXT_REG_RSI 9
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#define MCONTEXT_REG_RBP 10
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#define MCONTEXT_REG_RBX 11
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#define MCONTEXT_REG_RDX 12
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#define MCONTEXT_REG_RAX 13
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#define MCONTEXT_REG_RCX 14
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#define MCONTEXT_REG_RSP 15
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#define MCONTEXT_REG_RIP 16
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#define MCONTEXT_REG_EFL 17
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#define MCONTEXT_REG_CSGSFS 18
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#define MCONTEXT_REG_ERR 19
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#define MCONTEXT_REG_TRAPNO 20
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#define MCONTEXT_REG_OLDMASK 21
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#define MCONTEXT_REG_CR2 22
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#define MCONTEXT_NGREG 23
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typedef struct {
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unsigned long gregs[MCONTEXT_NGREG];
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uint8_t *fpu_state_p;
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unsigned long __reserved1[8];
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} mcontext_t;
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// this structure should have a part of it matching the ucontext from the abi
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// which then gets its address returned by the ARCH_SIGFRAME_GET_UCONTEXT_POINTER macro
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typedef struct {
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void *restorer; // for return from signal
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// ucontext starts here
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unsigned long uc_flags; // can be zero
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void *uc_link; // unused for signals
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stack_t oldstack;
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mcontext_t mcontext;
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sigset_t oldmask;
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// astral bits
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context_t context;
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extracontext_t extracontext;
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siginfo_t siginfo;
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uint8_t xsave[];
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} sigframe_t;
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#define ARCH_SIGFRAME_GET_UCONTEXT_POINTER(x) (&(x)->uc_flags)
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#define ARCH_SIGFRAME_SIZE (sizeof(sigframe_t) + arch_xsave_size)
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static inline void arch_sigframe_init(sigframe_t *sigframe) {
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sigframe->extracontext.xsave = sigframe->xsave;
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}
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#define CS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 0))
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#define GS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 1))
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#define FS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 2))
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#define SS_sig(context) (*((WORD *)&(context)->uc_mcontext.gregs[REG_CSGSFS] + 3))
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static inline void arch_sigframe_prepare_mcontext(void *stack, sigframe_t *sigframe) {
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context_t *context = &sigframe->context;
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extracontext_t *extracontext = &sigframe->extracontext;
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unsigned long *gregs = sigframe->mcontext.gregs;
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gregs[MCONTEXT_REG_R8] = context->r8;
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gregs[MCONTEXT_REG_R9] = context->r9;
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gregs[MCONTEXT_REG_R10] = context->r10;
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gregs[MCONTEXT_REG_R11] = context->r11;
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gregs[MCONTEXT_REG_R12] = context->r12;
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gregs[MCONTEXT_REG_R13] = context->r13;
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gregs[MCONTEXT_REG_R14] = context->r14;
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gregs[MCONTEXT_REG_R15] = context->r15;
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gregs[MCONTEXT_REG_RDI] = context->rdi;
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gregs[MCONTEXT_REG_RSI] = context->rsi;
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gregs[MCONTEXT_REG_RBP] = context->rbp;
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gregs[MCONTEXT_REG_RBX] = context->rbx;
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gregs[MCONTEXT_REG_RDX] = context->rdx;
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gregs[MCONTEXT_REG_RAX] = context->rax;
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gregs[MCONTEXT_REG_RCX] = context->rcx;
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gregs[MCONTEXT_REG_RSP] = context->rsp;
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gregs[MCONTEXT_REG_RIP] = context->rip;
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gregs[MCONTEXT_REG_EFL] = context->rflags;
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gregs[MCONTEXT_REG_CSGSFS] = (uint64_t)context->cs | ((uint64_t)context->gs << 16) | ((uint64_t)context->fs << 32) | ((uint64_t)context->ss << 48);
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gregs[MCONTEXT_REG_ERR] = context->error;
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gregs[MCONTEXT_REG_TRAPNO] = context->irq;
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gregs[MCONTEXT_REG_OLDMASK] = 0;
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gregs[MCONTEXT_REG_CR2] = context->cr2;
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extracontext->xsave = ((sigframe_t *)stack)->xsave;
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sigframe->mcontext.fpu_state_p = extracontext->xsave;
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}
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static inline void arch_sigframe_get_context_from_mcontext(sigframe_t *sigframe) {
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context_t *context = &sigframe->context;
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extracontext_t *extracontext = &sigframe->extracontext;
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unsigned long *gregs = sigframe->mcontext.gregs;
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context->r8 = gregs[MCONTEXT_REG_R8];
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context->r9 = gregs[MCONTEXT_REG_R9];
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context->r10 = gregs[MCONTEXT_REG_R10];
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context->r11 = gregs[MCONTEXT_REG_R11];
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context->r12 = gregs[MCONTEXT_REG_R12];
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context->r13 = gregs[MCONTEXT_REG_R13];
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context->r14 = gregs[MCONTEXT_REG_R14];
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context->r15 = gregs[MCONTEXT_REG_R15];
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context->rdi = gregs[MCONTEXT_REG_RDI];
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context->rsi = gregs[MCONTEXT_REG_RSI];
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context->rbp = gregs[MCONTEXT_REG_RBP];
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context->rbx = gregs[MCONTEXT_REG_RBX];
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context->rdx = gregs[MCONTEXT_REG_RDX];
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context->rax = gregs[MCONTEXT_REG_RAX];
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context->rcx = gregs[MCONTEXT_REG_RCX];
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context->rsp = gregs[MCONTEXT_REG_RSP];
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context->rip = gregs[MCONTEXT_REG_RIP];
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context->rflags = gregs[MCONTEXT_REG_EFL];
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context->error = gregs[MCONTEXT_REG_ERR];
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context->cr2 = gregs[MCONTEXT_REG_CR2];
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context->cs = gregs[MCONTEXT_REG_CSGSFS] & 0xffff;
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context->gs = (gregs[MCONTEXT_REG_CSGSFS] >> 16) & 0xffff;
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context->fs = (gregs[MCONTEXT_REG_CSGSFS] >> 32) & 0xffff;
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context->ss = (gregs[MCONTEXT_REG_CSGSFS] >> 48) & 0xffff;
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}
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#endif
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