mirror of
https://github.com/tobast/libunwind-eh_elf.git
synced 2024-11-22 15:47:37 +01:00
Implement the base code to fetch x86/xmm state on x86. Offsets to be filled.
This commit is contained in:
Konstantin Belousov
parent
2c50c95cde
commit
f6546e27ed
2 changed files with 89 additions and 24 deletions
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@ -139,8 +139,9 @@ unw_handle_signal_frame (unw_cursor_t *cursor)
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HIDDEN dwarf_loc_t
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x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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{
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unw_word_t addr = c->sigcontext_addr, fpstate_addr, off;
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int ret, is_fpstate = 0;
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unw_word_t addr = c->sigcontext_addr, off, xmm_off;
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unw_word_t fpstate, fpformat;
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int ret, is_fpstate = 0, is_xmmstate = 0;
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switch (c->sigcontext_format)
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{
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@ -171,6 +172,7 @@ x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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break;
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}
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off = 0; /* shut gcc warning */
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switch (reg)
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{
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case UNW_X86_GS: off = FREEBSD_UC_MCONTEXT_GS_OFF; break;
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@ -191,21 +193,53 @@ x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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case UNW_X86_EFLAGS: off = FREEBSD_UC_MCONTEXT_EFLAGS_OFF; break;
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case UNW_X86_SS: off = FREEBSD_UC_MCONTEXT_SS_OFF; break;
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/* XXXKIB fix */
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case UNW_X86_FCW: is_fpstate = 1; off = LINUX_FPSTATE_CW_OFF; break;
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case UNW_X86_FSW: is_fpstate = 1; off = LINUX_FPSTATE_SW_OFF; break;
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case UNW_X86_FTW: is_fpstate = 1; off = LINUX_FPSTATE_TAG_OFF; break;
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case UNW_X86_FCS: is_fpstate = 1; off = LINUX_FPSTATE_CSSEL_OFF; break;
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case UNW_X86_FIP: is_fpstate = 1; off = LINUX_FPSTATE_IPOFF_OFF; break;
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case UNW_X86_FEA: is_fpstate = 1; off = LINUX_FPSTATE_DATAOFF_OFF; break;
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case UNW_X86_FDS: is_fpstate = 1; off = LINUX_FPSTATE_DATASEL_OFF; break;
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case UNW_X86_MXCSR: is_fpstate = 1; off = LINUX_FPSTATE_MXCSR_OFF; break;
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case UNW_X86_FCW:
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is_fpstate = 1;
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off = FREEBSD_UC_MCONTEXT_CW_OFF;
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xmm_off = FREEBSD_UC_MCONTEXT_CW_XMM_OFF;
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break;
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case UNW_X86_FSW:
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is_fpstate = 1;
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off = FREEBSD_UC_MCONTEXT_SW_OFF;
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xmm_off = FREEBSD_UC_MCONTEXT_SW_XMM_OFF;
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break;
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case UNW_X86_FTW:
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is_fpstate = 1;
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xmm_off = FREEBSD_UC_MCONTEXT_TAG_XMM_OFF;
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off = FREEBSD_UC_MCONTEXT_TAG_OFF;
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break;
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case UNW_X86_FCS:
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is_fpstate = 1;
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off = FREEBSD_UC_MCONTEXT_CSSEL_OFF;
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xmm_off = FREEBSD_UC_MCONTEXT_CSSEL_XMM_OFF;
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break;
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case UNW_X86_FIP:
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is_fpstate = 1;
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off = FREEBSD_UC_MCONTEXT_IPOFF_OFF;
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xmm_off = FREEBSD_UC_MCONTEXT_IPOFF_XMM_OFF;
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break;
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case UNW_X86_FEA:
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is_fpstate = 1;
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off = FREEBSD_UC_MCONTEXT_DATAOFF_OFF;
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xmm_off = FREEBSD_UC_MCONTEXT_DATAOFF_XMM_OFF;
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break;
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case UNW_X86_FDS:
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is_fpstate = 1;
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off = FREEBSD_US_MCONTEXT_DATASEL_OFF;
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xmm_off = FREEBSD_US_MCONTEXT_DATASEL_XMM_OFF;
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break;
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case UNW_X86_MXCSR:
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is_fpstate = 1;
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off = FREEBSD_UC_MCONTEXT_MXCSR_OFF;
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xmm_off = FREEBSD_UC_MCONTEXT_MXCSR_XMM_OFF;
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break;
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/* stacked fp registers */
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case UNW_X86_ST0: case UNW_X86_ST1: case UNW_X86_ST2: case UNW_X86_ST3:
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case UNW_X86_ST4: case UNW_X86_ST5: case UNW_X86_ST6: case UNW_X86_ST7:
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is_fpstate = 1;
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off = LINUX_FPSTATE_ST0_OFF + 10*(reg - UNW_X86_ST0);
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off = FREEBSD_UC_MCONTEXT_ST0_OFF + 10*(reg - UNW_X86_ST0);
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xmm_off = FREEBSD_UC_MCONTEXT_ST0_XMM_OFF + 10*(reg - UNW_X86_ST0);
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break;
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/* SSE fp registers */
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@ -218,7 +252,8 @@ x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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case UNW_X86_XMM6_lo: case UNW_X86_XMM6_hi:
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case UNW_X86_XMM7_lo: case UNW_X86_XMM7_hi:
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is_fpstate = 1;
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off = LINUX_FPSTATE_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
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is_xmmstate = 1;
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xmm_off = FREEBSD_UC_MCONTEXT_XMM0_OFF + 8*(reg - UNW_X86_XMM0_lo);
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break;
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case UNW_X86_XMM0:
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case UNW_X86_XMM1:
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@ -229,7 +264,8 @@ x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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case UNW_X86_XMM6:
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case UNW_X86_XMM7:
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is_fpstate = 1;
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off = LINUX_FPSTATE_XMM0_OFF + 16*(reg - UNW_X86_XMM0);
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is_xmmstate = 1;
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xmm_off = FREEBSD_UC_MCONTEXT_XMM0_OFF + 16*(reg - UNW_X86_XMM0);
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break;
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case UNW_X86_FOP:
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@ -242,17 +278,22 @@ x86_get_scratch_loc (struct cursor *c, unw_regnum_t reg)
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if (is_fpstate)
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{
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if ((ret = dwarf_get (&c->dwarf,
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DWARF_MEM_LOC (&c->dwarf,
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addr + LINUX_SC_FPSTATE_OFF),
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&fpstate_addr)) < 0)
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DWARF_MEM_LOC (&c->dwarf, addr + FREEBSD_UC_MCONTEXT_FPSTATE_OFF),
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&fpstate)) < 0)
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return DWARF_NULL_LOC;
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if (!fpstate_addr)
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if (fpstate == FREEBSD_UC_MCONTEXT_FPOWNED_NONE)
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return DWARF_NULL_LOC;
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return DWARF_MEM_LOC (c, fpstate_addr + off);
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if ((ret = dwarf_get (&c->dwarf,
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DWARF_MEM_LOC (&c->dwarf, addr + FREEBSD_UC_MCONTEXT_FPFORMAT_OFF),
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&fpformat)) < 0)
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return DWARF_NULL_LOC;
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if (fpformat == FREEBSD_UC_MCONTEXT_FPFMT_NODEV ||
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(is_xmmstate && fpformat != FREEBSD_UC_MCONTEXT_FPFMT_XMM))
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return DWARF_NULL_LOC;
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if (is_xmmstate)
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off = xmm_off;
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}
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else
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return DWARF_MEM_LOC (c, addr + off);
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}
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@ -103,12 +103,36 @@
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#define FREEBSD_UC_MCONTEXT_CS_OFF 0x50
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#define FREEBSD_UC_MCONTEXT_EFLAGS_OFF 0x54
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#define FREEBSD_UC_MCONTEXT_OWNEDFP_OFF 0x68
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#define FREEBSD_UC_MCONTEXT_FPFORMAT_OFF 0x64
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#define FREEBSD_UC_MCONTEXT_FPFORMAT_OFF 0x64
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#define FREEBSD_UC_MCONTEXT_FPSTATE_OFF 0x70
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#define FREEBSD_UC_MCONTEXT_MC_LEN_OFF 0x60
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#define FREEBSD_UC_MCONTEXT_TRAPNO_OFF 0x44
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#define FREEBSD_UC_MCONTEXT_CW_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_CW_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_SW_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_SW_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_TAG_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_TAG_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_CSSEL_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_CSSEL_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_IPOFF_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_IPOFF_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_DATAOFF_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_DATAOFF_XMM_OFF 0x11111
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#define FREEBSD_US_MCONTEXT_DATASEL_OFF 0x11111
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#define FREEBSD_US_MCONTEXT_DATASEL_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_MXCSR_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_MXCSR_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_ST0_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_ST0_XMM_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_XMM0_OFF 0x11111
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#define FREEBSD_UC_MCONTEXT_MC_LEN_VAL 0x280
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#define FREEBSD_UC_MCONTEXT_FPOWNED_FPU 0x20001
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#define FREEBSD_UC_MCONTEXT_FPFMT_NODEV 0x10000
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#define FREEBSD_UC_MCONTEXT_FPFMT_387 0x10001
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#define FREEBSD_UC_MCONTEXT_FPFMT_XMM 0x10002
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#define FREEBSD_UC_MCONTEXT_FPOWNED_NONE 0x20000
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#define FREEBSD_UC_MCONTEXT_FPOWNED_FPU 0x20001
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#define FREEBSD_UC_MCONTEXT_FPOWNED_PCB 0x20002
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