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o Implement unw_getcontext()

Browse Source 
o Restore floating-point registers in jumpto()

These are required to native cross build GCC and GDB
(both do require libc++ and libunwind).

These are not tested.

Sponsored by:	DARPA, AFRL
This commit is contained in:
Ruslan Bukin 2018-06-19 14:46:59 +00:00
parent 2f7f197723
commit 4fe3053183
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=335370
2 changed files with 111 additions and 3 deletions
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37
contrib/llvm/projects/libunwind/src/UnwindRegistersRestore.S
View File

@ -488,6 +488,41 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
//
.p2align 2
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_riscv6jumptoEv)
#ifdef __riscv_float_abi_double
fld f0, (8 * 32 + 8 * 0)(a0)
fld f1, (8 * 32 + 8 * 1)(a0)
fld f2, (8 * 32 + 8 * 2)(a0)
fld f3, (8 * 32 + 8 * 3)(a0)
fld f4, (8 * 32 + 8 * 4)(a0)
fld f5, (8 * 32 + 8 * 5)(a0)
fld f6, (8 * 32 + 8 * 6)(a0)
fld f7, (8 * 32 + 8 * 7)(a0)
fld f8, (8 * 32 + 8 * 8)(a0)
fld f9, (8 * 32 + 8 * 9)(a0)
fld f10, (8 * 32 + 8 * 10)(a0)
fld f11, (8 * 32 + 8 * 11)(a0)
fld f12, (8 * 32 + 8 * 12)(a0)
fld f13, (8 * 32 + 8 * 13)(a0)
fld f14, (8 * 32 + 8 * 14)(a0)
fld f15, (8 * 32 + 8 * 15)(a0)
fld f16, (8 * 32 + 8 * 16)(a0)
fld f17, (8 * 32 + 8 * 17)(a0)
fld f18, (8 * 32 + 8 * 18)(a0)
fld f19, (8 * 32 + 8 * 19)(a0)
fld f20, (8 * 32 + 8 * 20)(a0)
fld f21, (8 * 32 + 8 * 21)(a0)
fld f22, (8 * 32 + 8 * 22)(a0)
fld f23, (8 * 32 + 8 * 23)(a0)
fld f24, (8 * 32 + 8 * 24)(a0)
fld f25, (8 * 32 + 8 * 25)(a0)
fld f26, (8 * 32 + 8 * 26)(a0)
fld f27, (8 * 32 + 8 * 27)(a0)
fld f28, (8 * 32 + 8 * 28)(a0)
fld f29, (8 * 32 + 8 * 29)(a0)
fld f30, (8 * 32 + 8 * 30)(a0)
fld f31, (8 * 32 + 8 * 31)(a0)
#endif
// x0 is zero
ld x1, (8 * 1)(a0)
ld x2, (8 * 2)(a0)
@ -522,8 +557,6 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_riscv6jumptoEv)
ld x31, (8 * 31)(a0)
ld x10, (8 * 10)(a0) // restore a0
/* RISCVTODO: restore FPU registers */
ret // jump to ra
#elif defined(__mips__) && defined(_ABIO32) && _MIPS_SIM == _ABIO32

77
contrib/llvm/projects/libunwind/src/UnwindRegistersSave.S
View File

@ -665,8 +665,83 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__riscv)
/* RISCVTODO */
#
# extern int unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# thread_state pointer is in a0
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
// x0 is zero
sd x1, (8 * 1)(a0)
sd x2, (8 * 2)(a0)
sd x3, (8 * 3)(a0)
sd x4, (8 * 4)(a0)
sd x5, (8 * 5)(a0)
sd x6, (8 * 6)(a0)
sd x7, (8 * 7)(a0)
sd x8, (8 * 8)(a0)
sd x9, (8 * 9)(a0)
sd x10, (8 * 10)(a0)
sd x11, (8 * 11)(a0)
sd x12, (8 * 12)(a0)
sd x13, (8 * 13)(a0)
sd x14, (8 * 14)(a0)
sd x15, (8 * 15)(a0)
sd x16, (8 * 16)(a0)
sd x17, (8 * 17)(a0)
sd x18, (8 * 18)(a0)
sd x19, (8 * 19)(a0)
sd x20, (8 * 20)(a0)
sd x21, (8 * 21)(a0)
sd x22, (8 * 22)(a0)
sd x23, (8 * 23)(a0)
sd x24, (8 * 24)(a0)
sd x25, (8 * 25)(a0)
sd x26, (8 * 26)(a0)
sd x27, (8 * 27)(a0)
sd x28, (8 * 28)(a0)
sd x29, (8 * 29)(a0)
sd x30, (8 * 30)(a0)
sd x31, (8 * 31)(a0)
#ifdef __riscv_float_abi_double
fsd f0, (8 * 32 + 8 * 0)(a0)
fsd f1, (8 * 32 + 8 * 1)(a0)
fsd f2, (8 * 32 + 8 * 2)(a0)
fsd f3, (8 * 32 + 8 * 3)(a0)
fsd f4, (8 * 32 + 8 * 4)(a0)
fsd f5, (8 * 32 + 8 * 5)(a0)
fsd f6, (8 * 32 + 8 * 6)(a0)
fsd f7, (8 * 32 + 8 * 7)(a0)
fsd f8, (8 * 32 + 8 * 8)(a0)
fsd f9, (8 * 32 + 8 * 9)(a0)
fsd f10, (8 * 32 + 8 * 10)(a0)
fsd f11, (8 * 32 + 8 * 11)(a0)
fsd f12, (8 * 32 + 8 * 12)(a0)
fsd f13, (8 * 32 + 8 * 13)(a0)
fsd f14, (8 * 32 + 8 * 14)(a0)
fsd f15, (8 * 32 + 8 * 15)(a0)
fsd f16, (8 * 32 + 8 * 16)(a0)
fsd f17, (8 * 32 + 8 * 17)(a0)
fsd f18, (8 * 32 + 8 * 18)(a0)
fsd f19, (8 * 32 + 8 * 19)(a0)
fsd f20, (8 * 32 + 8 * 20)(a0)
fsd f21, (8 * 32 + 8 * 21)(a0)
fsd f22, (8 * 32 + 8 * 22)(a0)
fsd f23, (8 * 32 + 8 * 23)(a0)
fsd f24, (8 * 32 + 8 * 24)(a0)
fsd f25, (8 * 32 + 8 * 25)(a0)
fsd f26, (8 * 32 + 8 * 26)(a0)
fsd f27, (8 * 32 + 8 * 27)(a0)
fsd f28, (8 * 32 + 8 * 28)(a0)
fsd f29, (8 * 32 + 8 * 29)(a0)
fsd f30, (8 * 32 + 8 * 30)(a0)
fsd f31, (8 * 32 + 8 * 31)(a0)
#endif
li a0, 0 // return UNW_ESUCCESS
ret // jump to ra
#endif
NO_EXEC_STACK_DIRECTIVE