From 4a1e8931eca05077afd0b7ed092ab0f10c5b457e Mon Sep 17 00:00:00 2001 From: Ilya Leoshkevich Date: Tue, 13 Apr 2021 22:56:08 +0200 Subject: [PATCH] linux-user/elfload: add s390x core dumping support Provide the following definitions required by the common code: * ELF_NREG: with the value of sizeof(s390_regs) / sizeof(long). * target_elf_gregset_t: define it like all the other arches do. * elf_core_copy_regs(): similar to kernel's s390_regs_get(). * USE_ELF_CORE_DUMP. * ELF_EXEC_PAGESIZE. Signed-off-by: Ilya Leoshkevich Message-Id: <20210413205608.22587-1-iii@linux.ibm.com> Signed-off-by: Laurent Vivier --- linux-user/elfload.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 9779263727..0e832b2649 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -1375,6 +1375,39 @@ static inline void init_thread(struct target_pt_regs *regs, struct image_info *i regs->gprs[15] = infop->start_stack; } +/* See linux kernel: arch/s390/include/uapi/asm/ptrace.h (s390_regs). */ +#define ELF_NREG 27 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +enum { + TARGET_REG_PSWM = 0, + TARGET_REG_PSWA = 1, + TARGET_REG_GPRS = 2, + TARGET_REG_ARS = 18, + TARGET_REG_ORIG_R2 = 26, +}; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUS390XState *env) +{ + int i; + uint32_t *aregs; + + (*regs)[TARGET_REG_PSWM] = tswapreg(env->psw.mask); + (*regs)[TARGET_REG_PSWA] = tswapreg(env->psw.addr); + for (i = 0; i < 16; i++) { + (*regs)[TARGET_REG_GPRS + i] = tswapreg(env->regs[i]); + } + aregs = (uint32_t *)&((*regs)[TARGET_REG_ARS]); + for (i = 0; i < 16; i++) { + aregs[i] = tswap32(env->aregs[i]); + } + (*regs)[TARGET_REG_ORIG_R2] = 0; +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + #endif /* TARGET_S390X */ #ifdef TARGET_RISCV