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f83f550549
Without this, only the crash frame's window is spilled to the stack; all deeper call frames remain in the register file and are absent from the core's memory segments. Stack unwinding fails past the first DWARF step because the callers' register save areas contain stale/garbage data. The real kernel calls flush_all_user_windows() at the top of do_coredump(). Mirror that via a weak target_flush_windows() hook called from dump_core_and_abort(), with the SPARC override calling the existing flush_windows() in cpu_loop.c. Signed-off-by: Matt Turner <mattst88@gmail.com> Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Signed-off-by: Helge Deller <deller@gmx.de>
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#include "qemu/osdep.h"
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#include "qemu.h"
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#include "loader.h"
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#include "elf.h"
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#include "target_elf.h"
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void elf_core_copy_regs(target_elf_gregset_t *r, const CPUArchState *env)
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{
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CPUSPARCState *e = (CPUSPARCState *)env;
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int i;
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memset(r, 0, sizeof(*r));
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#if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
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/* Linux kernel layout for sparc64 (arch/sparc/include/asm/elf_64.h):
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* [0..7] G0-G7
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* [8..15] O0-O7
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* [16..23] L0-L7
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* [24..31] I0-I7
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* [32] TSTATE
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* [33] TPC
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* [34] TNPC
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* [35] Y
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*/
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for (i = 0; i < 8; i++) {
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r->regs[i] = tswap64(env->gregs[i]);
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r->regs[8 + i] = tswap64(env->regwptr[WREG_O0 + i]);
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r->regs[16 + i] = tswap64(env->regwptr[WREG_L0 + i]);
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r->regs[24 + i] = tswap64(env->regwptr[WREG_I0 + i]);
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}
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r->regs[32] = tswap64(sparc64_tstate(e));
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r->regs[33] = tswap64(env->pc);
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r->regs[34] = tswap64(env->npc);
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r->regs[35] = tswap64(env->y);
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#else
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/* Linux kernel layout for sparc32 (arch/sparc/include/asm/elf_32.h):
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* [0] PSR
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* [1] PC
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* [2] NPC
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* [3] Y
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* [4..11] G0-G7
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* [12..19] O0-O7
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* [20..27] L0-L7
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* [28..35] I0-I7
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* [36..37] reserved (stack_check)
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*/
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r->regs[0] = tswap32(cpu_get_psr(e));
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r->regs[1] = tswap32(env->pc);
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r->regs[2] = tswap32(env->npc);
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r->regs[3] = tswap32(env->y);
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for (i = 0; i < 8; i++) {
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r->regs[4 + i] = tswap32(env->gregs[i]);
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r->regs[12 + i] = tswap32(env->regwptr[WREG_O0 + i]);
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r->regs[20 + i] = tswap32(env->regwptr[WREG_L0 + i]);
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r->regs[28 + i] = tswap32(env->regwptr[WREG_I0 + i]);
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}
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#endif
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}
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const char *get_elf_cpu_model(uint32_t eflags)
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{
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#ifdef TARGET_SPARC64
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return "TI UltraSparc II";
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#else
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return "Fujitsu MB86904";
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#endif
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}
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abi_ulong get_elf_hwcap(CPUState *cs)
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{
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/* There are not many sparc32 hwcap bits -- we have all of them. */
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uint32_t r = HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR |
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HWCAP_SPARC_SWAP | HWCAP_SPARC_MULDIV;
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#ifdef TARGET_SPARC64
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CPUSPARCState *env = cpu_env(cs);
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uint32_t features = env->def.features;
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r |= HWCAP_SPARC_V9 | HWCAP_SPARC_V8PLUS;
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/* 32x32 multiply and divide are efficient. */
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r |= HWCAP_SPARC_MUL32 | HWCAP_SPARC_DIV32;
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/* We don't have an internal feature bit for this. */
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r |= HWCAP_SPARC_POPC;
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r |= features & CPU_FEATURE_FSMULD ? HWCAP_SPARC_FSMULD : 0;
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r |= features & CPU_FEATURE_VIS1 ? HWCAP_SPARC_VIS : 0;
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r |= features & CPU_FEATURE_VIS2 ? HWCAP_SPARC_VIS2 : 0;
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r |= features & CPU_FEATURE_FMAF ? HWCAP_SPARC_FMAF : 0;
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r |= features & CPU_FEATURE_VIS3 ? HWCAP_SPARC_VIS3 : 0;
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r |= features & CPU_FEATURE_IMA ? HWCAP_SPARC_IMA : 0;
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#endif
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return r;
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}
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