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FreeBSD: add mcontext_t for aarch64

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What isn't disabled for test-std mostly passes, except for the copysign
and signbit tests for f16. Seemingly related to #14366.
This commit is contained in:
Stephen Gregoratto 2023-01-19 00:55:51 +11:00 committed by Veikka Tuominen
parent 38eebf3c4d
commit 7f635ae7bd
3 changed files with 93 additions and 51 deletions
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140
lib/std/c/freebsd.zig
View File

@ -155,6 +155,8 @@ pub const EAI = enum(c_int) {
pub const EAI_MAX = 15;
pub const IFNAMESIZE = 16;
pub const AI = struct {
/// get address to use bind()
pub const PASSIVE = 0x00000001;
@ -1271,62 +1273,98 @@ pub const siginfo_t = extern struct {
},
};
pub usingnamespace switch (builtin.cpu.arch) {
.x86_64 => struct {
pub const ucontext_t = extern struct {
sigmask: sigset_t,
mcontext: mcontext_t,
link: ?*ucontext_t,
stack: stack_t,
flags: c_int,
__spare__: [4]c_int,
};
/// XXX x86_64 specific
pub const mcontext_t = extern struct {
onstack: u64,
rdi: u64,
rsi: u64,
rdx: u64,
rcx: u64,
r8: u64,
r9: u64,
rax: u64,
rbx: u64,
rbp: u64,
r10: u64,
r11: u64,
r12: u64,
r13: u64,
r14: u64,
r15: u64,
trapno: u32,
fs: u16,
gs: u16,
addr: u64,
pub const mcontext_t = switch (builtin.cpu.arch) {
.x86_64 => extern struct {
onstack: u64,
rdi: u64,
rsi: u64,
rdx: u64,
rcx: u64,
r8: u64,
r9: u64,
rax: u64,
rbx: u64,
rbp: u64,
r10: u64,
r11: u64,
r12: u64,
r13: u64,
r14: u64,
r15: u64,
trapno: u32,
fs: u16,
gs: u16,
addr: u64,
flags: u32,
es: u16,
ds: u16,
err: u64,
rip: u64,
cs: u64,
rflags: u64,
rsp: u64,
ss: u64,
len: u64,
fpformat: u64,
ownedfp: u64,
fpstate: [64]u64 align(16),
fsbase: u64,
gsbase: u64,
xfpustate: u64,
xfpustate_len: u64,
spare: [4]u64,
},
.aarch64 => extern struct {
gpregs: extern struct {
x: [30]u64,
lr: u64,
sp: u64,
elr: u64,
spsr: u32,
_pad: u32,
},
fpregs: extern struct {
q: [32]u128,
sr: u32,
cr: u32,
flags: u32,
es: u16,
ds: u16,
err: u64,
rip: u64,
cs: u64,
rflags: u64,
rsp: u64,
ss: u64,
len: u64,
fpformat: u64,
ownedfp: u64,
fpstate: [64]u64 align(16),
fsbase: u64,
gsbase: u64,
xfpustate: u64,
xfpustate_len: u64,
spare: [4]u64,
};
_pad: u32,
},
flags: u32,
_pad: u32,
_spare: [8]u64,
},
else => struct {},
};
pub const REG = switch (builtin.cpu.arch) {
.aarch64 => struct {
pub const FP = 29;
pub const SP = 31;
pub const PC = 32;
},
.arm => struct {
pub const FP = 11;
pub const SP = 13;
pub const PC = 15;
},
.x86_64 => struct {
pub const RBP = 12;
pub const RIP = 21;
pub const RSP = 24;
},
else => struct {},
};
pub const ucontext_t = extern struct {
sigmask: sigset_t,
mcontext: mcontext_t,
link: ?*ucontext_t,
stack: stack_t,
flags: c_int,
__spare__: [4]c_int,
};
pub const E = enum(u16) {
/// No error occurred.
SUCCESS = 0,

2
lib/std/debug.zig
View File

@ -1986,12 +1986,14 @@ fn handleSegfaultPosix(sig: i32, info: *const os.siginfo_t, ctx_ptr: ?*const any
const ip = switch (native_os) {
.macos => @intCast(usize, ctx.mcontext.ss.pc),
.netbsd => @intCast(usize, ctx.mcontext.gregs[os.REG.PC]),
.freebsd => @intCast(usize, ctx.mcontext.gpregs.elr),
else => @intCast(usize, ctx.mcontext.pc),
};
// x29 is the ABI-designated frame pointer
const bp = switch (native_os) {
.macos => @intCast(usize, ctx.mcontext.ss.fp),
.netbsd => @intCast(usize, ctx.mcontext.gregs[os.REG.FP]),
.freebsd => @intCast(usize, ctx.mcontext.gpregs.x[os.REG.FP]),
else => @intCast(usize, ctx.mcontext.regs[29]),
};
dumpStackTraceFromBase(bp, ip);

2
src/crash_report.zig
View File

@ -238,12 +238,14 @@ fn handleSegfaultPosix(sig: i32, info: *const os.siginfo_t, ctx_ptr: ?*const any
const ip = switch (native_os) {
.macos => @intCast(usize, ctx.mcontext.ss.pc),
.netbsd => @intCast(usize, ctx.mcontext.gregs[os.REG.PC]),
.freebsd => @intCast(usize, ctx.mcontext.gpregs.elr),
else => @intCast(usize, ctx.mcontext.pc),
};
// x29 is the ABI-designated frame pointer
const bp = switch (native_os) {
.macos => @intCast(usize, ctx.mcontext.ss.fp),
.netbsd => @intCast(usize, ctx.mcontext.gregs[os.REG.FP]),
.freebsd => @intCast(usize, ctx.mcontext.gpregs.x[os.REG.FP]),
else => @intCast(usize, ctx.mcontext.regs[29]),
};
break :ctx StackContext{ .exception = .{ .bp = bp, .ip = ip } };