diff options
34 files changed, 293 insertions, 296 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 24b70169bc..459e3594e1 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -909,7 +909,7 @@ X86 Machines ------------ PC M: Michael S. Tsirkin <mst@redhat.com> -M: Marcel Apfelbaum <marcel@redhat.com> +M: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> S: Supported F: include/hw/i386/ F: hw/i386/ @@ -959,7 +959,7 @@ F: include/hw/timer/mc146818rtc* Machine core M: Eduardo Habkost <ehabkost@redhat.com> -M: Marcel Apfelbaum <marcel@redhat.com> +M: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> S: Supported F: hw/core/machine.c F: hw/core/null-machine.c @@ -1033,7 +1033,7 @@ F: hw/ipack/ PCI M: Michael S. Tsirkin <mst@redhat.com> -M: Marcel Apfelbaum <marcel@redhat.com> +M: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> S: Supported F: include/hw/pci/* F: hw/misc/pci-testdev.c @@ -2075,7 +2075,7 @@ F: docs/block-replication.txt PVRDMA M: Yuval Shaia <yuval.shaia@oracle.com> -M: Marcel Apfelbaum <marcel@redhat.com> +M: Marcel Apfelbaum <marcel.apfelbaum@gmail.com> S: Maintained F: hw/rdma/* F: hw/rdma/vmw/* diff --git a/hw/rdma/rdma_backend.c b/hw/rdma/rdma_backend.c index 5c7b3d8949..e9ced6f9ef 100644 --- a/hw/rdma/rdma_backend.c +++ b/hw/rdma/rdma_backend.c @@ -774,7 +774,7 @@ int rdma_backend_init(RdmaBackendDev *backend_dev, goto out_destroy_comm_channel; } - if (backend_dev->backend_gid_idx > port_attr.gid_tbl_len) { + if (backend_dev->backend_gid_idx >= port_attr.gid_tbl_len) { error_setg(errp, "Invalid backend_gid_idx, should be less than %d", port_attr.gid_tbl_len); goto out_destroy_comm_channel; diff --git a/hw/rdma/rdma_rm.c b/hw/rdma/rdma_rm.c index 51a47d7292..415da15efe 100644 --- a/hw/rdma/rdma_rm.c +++ b/hw/rdma/rdma_rm.c @@ -21,8 +21,6 @@ #include "rdma_backend.h" #include "rdma_rm.h" -#define MAX_RM_TBL_NAME 16 - /* Page directory and page tables */ #define PG_DIR_SZ { TARGET_PAGE_SIZE / sizeof(__u64) } #define PG_TBL_SZ { TARGET_PAGE_SIZE / sizeof(__u64) } diff --git a/hw/rdma/rdma_rm_defs.h b/hw/rdma/rdma_rm_defs.h index fc646da61f..226011176d 100644 --- a/hw/rdma/rdma_rm_defs.h +++ b/hw/rdma/rdma_rm_defs.h @@ -20,9 +20,9 @@ #define MAX_PORTS 1 #define MAX_PORT_GIDS 1 +#define MAX_GIDS MAX_PORT_GIDS #define MAX_PORT_PKEYS 1 -#define MAX_PKEYS 1 -#define MAX_GIDS 2048 +#define MAX_PKEYS MAX_PORT_PKEYS #define MAX_UCS 512 #define MAX_MR_SIZE (1UL << 27) #define MAX_QP 1024 @@ -34,9 +34,9 @@ #define MAX_QP_INIT_RD_ATOM 16 #define MAX_AH 64 -#define MAX_RMRESTBL_NAME_SZ 16 +#define MAX_RM_TBL_NAME 16 typedef struct RdmaRmResTbl { - char name[MAX_RMRESTBL_NAME_SZ]; + char name[MAX_RM_TBL_NAME]; QemuMutex lock; unsigned long *bitmap; size_t tbl_sz; @@ -87,7 +87,6 @@ typedef struct RdmaRmQP { typedef struct RdmaRmPort { union ibv_gid gid_tbl[MAX_PORT_GIDS]; enum ibv_port_state state; - int *pkey_tbl; /* TODO: Not yet supported */ } RdmaRmPort; typedef struct RdmaDeviceResources { diff --git a/hw/rdma/vmw/pvrdma.h b/hw/rdma/vmw/pvrdma.h index 8c173cb824..0b46dc5a9b 100644 --- a/hw/rdma/vmw/pvrdma.h +++ b/hw/rdma/vmw/pvrdma.h @@ -31,7 +31,7 @@ #define RDMA_REG_BAR_IDX 1 #define RDMA_UAR_BAR_IDX 2 #define RDMA_BAR0_MSIX_SIZE (16 * 1024) -#define RDMA_BAR1_REGS_SIZE 256 +#define RDMA_BAR1_REGS_SIZE 64 #define RDMA_BAR2_UAR_SIZE (0x1000 * MAX_UCS) /* each uc gets page */ /* MSIX */ @@ -86,7 +86,7 @@ static inline int get_reg_val(PVRDMADev *dev, hwaddr addr, uint32_t *val) { int idx = addr >> 2; - if (idx > RDMA_BAR1_REGS_SIZE) { + if (idx >= RDMA_BAR1_REGS_SIZE) { return -EINVAL; } @@ -99,7 +99,7 @@ static inline int set_reg_val(PVRDMADev *dev, hwaddr addr, uint32_t val) { int idx = addr >> 2; - if (idx > RDMA_BAR1_REGS_SIZE) { + if (idx >= RDMA_BAR1_REGS_SIZE) { return -EINVAL; } diff --git a/hw/rdma/vmw/pvrdma_cmd.c b/hw/rdma/vmw/pvrdma_cmd.c index 99019d8741..14255d609f 100644 --- a/hw/rdma/vmw/pvrdma_cmd.c +++ b/hw/rdma/vmw/pvrdma_cmd.c @@ -232,7 +232,7 @@ static int create_mr(PVRDMADev *dev, union pvrdma_cmd_req *req, cmd->start, cmd->length, host_virt, cmd->access_flags, &resp->mr_handle, &resp->lkey, &resp->rkey); - if (!resp->hdr.err) { + if (host_virt && !resp->hdr.err) { munmap(host_virt, cmd->length); } @@ -576,7 +576,7 @@ static int create_bind(PVRDMADev *dev, union pvrdma_cmd_req *req, pr_dbg("index=%d\n", cmd->index); - if (cmd->index > MAX_PORT_GIDS) { + if (cmd->index >= MAX_PORT_GIDS) { return -EINVAL; } @@ -603,7 +603,11 @@ static int destroy_bind(PVRDMADev *dev, union pvrdma_cmd_req *req, { struct pvrdma_cmd_destroy_bind *cmd = &req->destroy_bind; - pr_dbg("clear index %d\n", cmd->index); + pr_dbg("index=%d\n", cmd->index); + + if (cmd->index >= MAX_PORT_GIDS) { + return -EINVAL; + } memset(dev->rdma_dev_res.ports[0].gid_tbl[cmd->index].raw, 0, sizeof(dev->rdma_dev_res.ports[0].gid_tbl[cmd->index].raw)); diff --git a/hw/rdma/vmw/pvrdma_main.c b/hw/rdma/vmw/pvrdma_main.c index c552248c90..3ed7409763 100644 --- a/hw/rdma/vmw/pvrdma_main.c +++ b/hw/rdma/vmw/pvrdma_main.c @@ -275,15 +275,6 @@ static void init_dsr_dev_caps(PVRDMADev *dev) pr_dbg("Initialized\n"); } -static void free_ports(PVRDMADev *dev) -{ - int i; - - for (i = 0; i < MAX_PORTS; i++) { - g_free(dev->rdma_dev_res.ports[i].gid_tbl); - } -} - static void init_ports(PVRDMADev *dev, Error **errp) { int i; @@ -292,10 +283,6 @@ static void init_ports(PVRDMADev *dev, Error **errp) for (i = 0; i < MAX_PORTS; i++) { dev->rdma_dev_res.ports[i].state = IBV_PORT_DOWN; - - dev->rdma_dev_res.ports[i].pkey_tbl = - g_malloc0(sizeof(*dev->rdma_dev_res.ports[i].pkey_tbl) * - MAX_PORT_PKEYS); } } @@ -462,14 +449,14 @@ static void init_bars(PCIDevice *pdev) /* BAR 1 - Registers */ memset(&dev->regs_data, 0, sizeof(dev->regs_data)); memory_region_init_io(&dev->regs, OBJECT(dev), ®s_ops, dev, - "pvrdma-regs", RDMA_BAR1_REGS_SIZE); + "pvrdma-regs", sizeof(dev->regs_data)); pci_register_bar(pdev, RDMA_REG_BAR_IDX, PCI_BASE_ADDRESS_SPACE_MEMORY, &dev->regs); /* BAR 2 - UAR */ memset(&dev->uar_data, 0, sizeof(dev->uar_data)); memory_region_init_io(&dev->uar, OBJECT(dev), &uar_ops, dev, "rdma-uar", - RDMA_BAR2_UAR_SIZE); + sizeof(dev->uar_data)); pci_register_bar(pdev, RDMA_UAR_BAR_IDX, PCI_BASE_ADDRESS_SPACE_MEMORY, &dev->uar); } @@ -622,8 +609,6 @@ static void pvrdma_exit(PCIDevice *pdev) pvrdma_qp_ops_fini(); - free_ports(dev); - rdma_rm_fini(&dev->rdma_dev_res); rdma_backend_fini(&dev->backend_dev); diff --git a/hw/rdma/vmw/pvrdma_qp_ops.c b/hw/rdma/vmw/pvrdma_qp_ops.c index 750ade6c31..99bb51111e 100644 --- a/hw/rdma/vmw/pvrdma_qp_ops.c +++ b/hw/rdma/vmw/pvrdma_qp_ops.c @@ -216,6 +216,7 @@ void pvrdma_cq_poll(RdmaDeviceResources *dev_res, uint32_t cq_handle) cq = rdma_rm_get_cq(dev_res, cq_handle); if (!cq) { pr_dbg("Invalid CQ# %d\n", cq_handle); + return; } rdma_backend_poll_cq(dev_res, &cq->backend_cq); diff --git a/include/elf.h b/include/elf.h index c0dc9bb5fd..934dbbd6b3 100644 --- a/include/elf.h +++ b/include/elf.h @@ -1483,6 +1483,7 @@ typedef struct elf64_shdr { #define ELFOSABI_TRU64 10 /* Compaq TRU64 UNIX. */ #define ELFOSABI_MODESTO 11 /* Novell Modesto. */ #define ELFOSABI_OPENBSD 12 /* OpenBSD. */ +#define ELFOSABI_ARM_FDPIC 65 /* ARM FDPIC */ #define ELFOSABI_ARM 97 /* ARM */ #define ELFOSABI_STANDALONE 255 /* Standalone (embedded) application */ diff --git a/include/exec/user/abitypes.h b/include/exec/user/abitypes.h index ba188608c2..743b8bb9ea 100644 --- a/include/exec/user/abitypes.h +++ b/include/exec/user/abitypes.h @@ -15,7 +15,7 @@ #define ABI_LLONG_ALIGNMENT 2 #endif -#if defined(TARGET_I386) && !defined(TARGET_X86_64) +#if (defined(TARGET_I386) && !defined(TARGET_X86_64)) || defined(TARGET_SH4) #define ABI_LLONG_ALIGNMENT 4 #endif diff --git a/linux-user/aarch64/signal.c b/linux-user/aarch64/signal.c index d90e10a113..f95dc61dfb 100644 --- a/linux-user/aarch64/signal.c +++ b/linux-user/aarch64/signal.c @@ -120,9 +120,7 @@ static void target_setup_general_frame(struct target_rt_sigframe *sf, __put_user(0, &sf->uc.tuc_flags); __put_user(0, &sf->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &sf->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->xregs[31]), &sf->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, &sf->uc.tuc_stack.ss_size); + target_save_altstack(&sf->uc.tuc_stack, env); for (i = 0; i < 31; i++) { __put_user(env->xregs[i], &sf->uc.tuc_mcontext.regs[i]); @@ -372,14 +370,7 @@ static abi_ulong get_sigframe(struct target_sigaction *ka, { abi_ulong sp; - sp = env->xregs[31]; - - /* - * This is the X/Open sanctioned signal stack switching. - */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + sp = target_sigsp(get_sp_from_cpustate(env), ka); sp = (sp - size) & ~15; diff --git a/linux-user/alpha/signal.c b/linux-user/alpha/signal.c index a8c718f2c6..f24de02c6f 100644 --- a/linux-user/alpha/signal.c +++ b/linux-user/alpha/signal.c @@ -117,12 +117,10 @@ static inline abi_ulong get_sigframe(struct target_sigaction *sa, CPUAlphaState *env, unsigned long framesize) { - abi_ulong sp = env->ir[IR_SP]; + abi_ulong sp; + + sp = target_sigsp(get_sp_from_cpustate(env), sa); - /* This is the X/Open sanctioned signal stack switching. */ - if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } return (sp - framesize) & -32; } @@ -187,12 +185,9 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); __put_user(set->sig[0], &frame->uc.tuc_osf_sigmask); - __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->ir[IR_SP]), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + + target_save_altstack(&frame->uc.tuc_stack, env); + setup_sigcontext(&frame->uc.tuc_mcontext, env, frame_addr, set); for (i = 0; i < TARGET_NSIG_WORDS; ++i) { __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); diff --git a/linux-user/arm/signal.c b/linux-user/arm/signal.c index 0c1ec53025..59b5b65ed1 100644 --- a/linux-user/arm/signal.c +++ b/linux-user/arm/signal.c @@ -102,13 +102,13 @@ struct sigframe_v1 { struct target_sigcontext sc; abi_ulong extramask[TARGET_NSIG_WORDS-1]; - abi_ulong retcode; + abi_ulong retcode[4]; }; struct sigframe_v2 { struct target_ucontext_v2 uc; - abi_ulong retcode; + abi_ulong retcode[4]; }; struct rt_sigframe_v1 @@ -117,14 +117,14 @@ struct rt_sigframe_v1 abi_ulong puc; struct target_siginfo info; struct target_ucontext_v1 uc; - abi_ulong retcode; + abi_ulong retcode[4]; }; struct rt_sigframe_v2 { struct target_siginfo info; struct target_ucontext_v2 uc; - abi_ulong retcode; + abi_ulong retcode[4]; }; #define TARGET_CONFIG_CPU_32 1 @@ -147,6 +147,21 @@ static const abi_ulong retcodes[4] = { SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN }; +/* + * Stub needed to make sure the FD register (r9) contains the right + * value. + */ +static const unsigned long sigreturn_fdpic_codes[3] = { + 0xe59fc004, /* ldr r12, [pc, #4] to read function descriptor */ + 0xe59c9004, /* ldr r9, [r12, #4] to setup GOT */ + 0xe59cf000 /* ldr pc, [r12] to jump into restorer */ +}; + +static const unsigned long sigreturn_fdpic_thumb_codes[3] = { + 0xc008f8df, /* ldr r12, [pc, #8] to read function descriptor */ + 0x9004f8dc, /* ldr r9, [r12, #4] to setup GOT */ + 0xf000f8dc /* ldr pc, [r12] to jump into restorer */ +}; static inline int valid_user_regs(CPUARMState *regs) { @@ -186,27 +201,42 @@ setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/ static inline abi_ulong get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize) { - unsigned long sp = regs->regs[13]; + unsigned long sp; - /* - * This is the X/Open sanctioned signal stack switching. - */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + sp = target_sigsp(get_sp_from_cpustate(regs), ka); /* * ATPCS B01 mandates 8-byte alignment */ return (sp - framesize) & ~7; } -static void +static int setup_return(CPUARMState *env, struct target_sigaction *ka, abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr) { - abi_ulong handler = ka->_sa_handler; + abi_ulong handler = 0; + abi_ulong handler_fdpic_GOT = 0; abi_ulong retcode; - int thumb = handler & 1; + + int thumb; + int is_fdpic = info_is_fdpic(((TaskState *)thread_cpu->opaque)->info); + + if (is_fdpic) { + /* In FDPIC mode, ka->_sa_handler points to a function + * descriptor (FD). The first word contains the address of the + * handler. The second word contains the value of the PIC + * register (r9). */ + abi_ulong funcdesc_ptr = ka->_sa_handler; + if (get_user_ual(handler, funcdesc_ptr) + || get_user_ual(handler_fdpic_GOT, funcdesc_ptr + 4)) { + return 1; + } + } else { + handler = ka->_sa_handler; + } + + thumb = handler & 1; + uint32_t cpsr = cpsr_read(env); cpsr &= ~CPSR_IT; @@ -217,7 +247,28 @@ setup_return(CPUARMState *env, struct target_sigaction *ka, } if (ka->sa_flags & TARGET_SA_RESTORER) { - retcode = ka->sa_restorer; + if (is_fdpic) { + /* For FDPIC we ensure that the restorer is called with a + * correct r9 value. For that we need to write code on + * the stack that sets r9 and jumps back to restorer + * value. + */ + if (thumb) { + __put_user(sigreturn_fdpic_thumb_codes[0], rc); + __put_user(sigreturn_fdpic_thumb_codes[1], rc + 1); + __put_user(sigreturn_fdpic_thumb_codes[2], rc + 2); + __put_user((abi_ulong)ka->sa_restorer, rc + 3); + } else { + __put_user(sigreturn_fdpic_codes[0], rc); + __put_user(sigreturn_fdpic_codes[1], rc + 1); + __put_user(sigreturn_fdpic_codes[2], rc + 2); + __put_user((abi_ulong)ka->sa_restorer, rc + 3); + } + + retcode = rc_addr + thumb; + } else { + retcode = ka->sa_restorer; + } } else { unsigned int idx = thumb; @@ -231,10 +282,15 @@ setup_return(CPUARMState *env, struct target_sigaction *ka, } env->regs[0] = usig; + if (is_fdpic) { + env->regs[9] = handler_fdpic_GOT; + } env->regs[13] = frame_addr; env->regs[14] = retcode; env->regs[15] = handler & (thumb ? ~1 : ~3); cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr); + + return 0; } static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env) @@ -285,9 +341,7 @@ static void setup_sigframe_v2(struct target_ucontext_v2 *uc, memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext)); memset(&stack, 0, sizeof(stack)); - __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); - __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); + target_save_altstack(&stack, env); memcpy(&uc->tuc_stack, &stack, sizeof(stack)); setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]); @@ -327,12 +381,15 @@ static void setup_frame_v1(int usig, struct target_sigaction *ka, __put_user(set->sig[i], &frame->extramask[i - 1]); } - setup_return(regs, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct sigframe_v1, retcode)); + if (setup_return(regs, ka, frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct sigframe_v1, retcode))) { + goto sigsegv; + } unlock_user_struct(frame, frame_addr, 1); return; sigsegv: + unlock_user_struct(frame, frame_addr, 1); force_sigsegv(usig); } @@ -349,12 +406,15 @@ static void setup_frame_v2(int usig, struct target_sigaction *ka, setup_sigframe_v2(&frame->uc, set, regs); - setup_return(regs, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct sigframe_v2, retcode)); + if (setup_return(regs, ka, frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct sigframe_v2, retcode))) { + goto sigsegv; + } unlock_user_struct(frame, frame_addr, 1); return; sigsegv: + unlock_user_struct(frame, frame_addr, 1); force_sigsegv(usig); } @@ -394,9 +454,7 @@ static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext)); memset(&stack, 0, sizeof(stack)); - __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp); - __put_user(target_sigaltstack_used.ss_size, &stack.ss_size); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags); + target_save_altstack(&stack, env); memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack)); setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]); @@ -404,8 +462,10 @@ static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); } - setup_return(env, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct rt_sigframe_v1, retcode)); + if (setup_return(env, ka, frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct rt_sigframe_v1, retcode))) { + goto sigsegv; + } env->regs[1] = info_addr; env->regs[2] = uc_addr; @@ -413,6 +473,7 @@ static void setup_rt_frame_v1(int usig, struct target_sigaction *ka, unlock_user_struct(frame, frame_addr, 1); return; sigsegv: + unlock_user_struct(frame, frame_addr, 1); force_sigsegv(usig); } @@ -435,8 +496,10 @@ static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, setup_sigframe_v2(&frame->uc, set, env); - setup_return(env, ka, &frame->retcode, frame_addr, usig, - frame_addr + offsetof(struct rt_sigframe_v2, retcode)); + if (setup_return(env, ka, frame->retcode, frame_addr, usig, + frame_addr + offsetof(struct rt_sigframe_v2, retcode))) { + goto sigsegv; + } env->regs[1] = info_addr; env->regs[2] = uc_addr; @@ -444,6 +507,7 @@ static void setup_rt_frame_v2(int usig, struct target_sigaction *ka, unlock_user_struct(frame, frame_addr, 1); return; sigsegv: + unlock_user_struct(frame, frame_addr, 1); force_sigsegv(usig); } diff --git a/linux-user/arm/target_structs.h b/linux-user/arm/target_structs.h index 0bf034cc25..9a3dbce03d 100644 --- a/linux-user/arm/target_structs.h +++ b/linux-user/arm/target_structs.h @@ -49,4 +49,11 @@ struct target_shmid_ds { abi_ulong __unused5; }; +struct target_oabi_flock64 { + abi_short l_type; + abi_short l_whence; + abi_llong l_start; + abi_llong l_len; + abi_int l_pid; +} QEMU_PACKED; #endif diff --git a/linux-user/elfload.c b/linux-user/elfload.c index c77ed1bb01..36d52194bc 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -78,6 +78,11 @@ enum { */ #define personality(pers) (pers & PER_MASK) +int info_is_fdpic(struct image_info *info) +{ + return info->personality == PER_LINUX_FDPIC; +} + /* this flag is uneffective under linux too, should be deleted */ #ifndef MAP_DENYWRITE #define MAP_DENYWRITE 0 @@ -287,6 +292,25 @@ static inline void init_thread(struct target_pt_regs *regs, /* For uClinux PIC binaries. */ /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ regs->uregs[10] = infop->start_data; + + /* Support ARM FDPIC. */ + if (info_is_fdpic(infop)) { + /* As described in the ABI document, r7 points to the loadmap info + * prepared by the kernel. If an interpreter is needed, r8 points + * to the interpreter loadmap and r9 points to the interpreter + * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and + * r9 points to the main program PT_DYNAMIC info. + */ + regs->uregs[7] = infop->loadmap_addr; + if (infop->interpreter_loadmap_addr) { + /* Executable is dynamically loaded. */ + regs->uregs[8] = infop->interpreter_loadmap_addr; + regs->uregs[9] = infop->interpreter_pt_dynamic_addr; + } else { + regs->uregs[8] = 0; + regs->uregs[9] = infop->pt_dynamic_addr; + } + } } #define ELF_NREG 18 @@ -1681,7 +1705,19 @@ static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot) } } -#ifdef CONFIG_USE_FDPIC +#ifdef TARGET_ARM +static int elf_is_fdpic(struct elfhdr *exec) +{ + return exec->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC; +} +#else +/* Default implementation, always false. */ +static int elf_is_fdpic(struct elfhdr *exec) +{ + return 0; +} +#endif + static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp) { uint16_t n; @@ -1706,7 +1742,6 @@ static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong s return sp; } -#endif static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, struct elfhdr *exec, @@ -1725,7 +1760,6 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, sp = p; -#ifdef CONFIG_USE_FDPIC /* Needs to be before we load the env/argc/... */ if (elf_is_fdpic(exec)) { /* Need 4 byte alignment for these structs */ @@ -1735,9 +1769,13 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, if (interp_info) { interp_info->other_info = info; sp = loader_build_fdpic_loadmap(interp_info, sp); + info->interpreter_loadmap_addr = interp_info->loadmap_addr; + info->interpreter_pt_dynamic_addr = interp_info->pt_dynamic_addr; + } else { + info->interpreter_loadmap_addr = 0; + info->interpreter_pt_dynamic_addr = 0; } } -#endif u_platform = 0; k_platform = ELF_PLATFORM; @@ -2153,10 +2191,8 @@ static void load_elf_image(const char *image_name, int image_fd, } bswap_phdr(phdr, ehdr->e_phnum); -#ifdef CONFIG_USE_FDPIC info->nsegs = 0; info->pt_dynamic_addr = 0; -#endif mmap_lock(); @@ -2173,9 +2209,7 @@ static void load_elf_image(const char *image_name, int image_fd, if (a > hiaddr) { hiaddr = a; } -#ifdef CONFIG_USE_FDPIC ++info->nsegs; -#endif } } @@ -2200,8 +2234,7 @@ static void load_elf_image(const char *image_name, int image_fd, } load_bias = load_addr - loaddr; -#ifdef CONFIG_USE_FDPIC - { + if (elf_is_fdpic(ehdr)) { struct elf32_fdpic_loadseg *loadsegs = info->loadsegs = g_malloc(sizeof(*loadsegs) * info->nsegs); @@ -2219,7 +2252,6 @@ static void load_elf_image(const char *image_name, int image_fd, } } } -#endif info->load_bias = load_bias; info->load_addr = load_addr; diff --git a/linux-user/hppa/signal.c b/linux-user/hppa/signal.c index 585af3a37f..6e7a295aee 100644 --- a/linux-user/hppa/signal.c +++ b/linux-user/hppa/signal.c @@ -113,11 +113,9 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, struct target_rt_sigframe *frame; int i; - sp = env->gr[30]; - if (ka->sa_flags & TARGET_SA_ONSTACK) { - if (sas_ss_flags(sp) == 0) { - sp = (target_sigaltstack_used.ss_sp + 0x7f) & ~0x3f; - } + sp = get_sp_from_cpustate(env); + if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) { + sp = (target_sigaltstack_used.ss_sp + 0x7f) & ~0x3f; } frame_addr = QEMU_ALIGN_UP(sp, 64); sp = frame_addr + PARISC_RT_SIGFRAME_SIZE32; @@ -132,11 +130,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, frame->uc.tuc_flags = 0; frame->uc.tuc_link = 0; - __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); for (i = 0; i < TARGET_NSIG_WORDS; i++) { __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); diff --git a/linux-user/i386/signal.c b/linux-user/i386/signal.c index 4a190e6435..e9a23a2dec 100644 --- a/linux-user/i386/signal.c +++ b/linux-user/i386/signal.c @@ -283,16 +283,14 @@ get_sigframe(struct target_sigaction *ka, CPUX86State *env, size_t frame_size) unsigned long esp; /* Default to using normal stack */ - esp = env->regs[R_ESP]; + esp = get_sp_from_cpustate(env); #ifdef TARGET_X86_64 esp -= 128; /* this is the redzone */ #endif /* This is the X/Open sanctioned signal stack switching. */ if (ka->sa_flags & TARGET_SA_ONSTACK) { - if (sas_ss_flags(esp) == 0) { - esp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + esp = target_sigsp(esp, ka); } else { #ifndef TARGET_X86_64 /* This is the legacy signal stack switching. */ @@ -404,11 +402,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Create the ucontext. */ __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); setup_sigcontext(&frame->uc.tuc_mcontext, &frame->fpstate, env, set->sig[0], frame_addr + offsetof(struct rt_sigframe, fpstate)); diff --git a/linux-user/m68k/signal.c b/linux-user/m68k/signal.c index fc72468a81..5dd8bb5f99 100644 --- a/linux-user/m68k/signal.c +++ b/linux-user/m68k/signal.c @@ -117,14 +117,10 @@ static inline abi_ulong get_sigframe(struct target_sigaction *ka, CPUM68KState *regs, size_t frame_size) { - unsigned long sp; + abi_ulong sp; - sp = regs->aregs[7]; + sp = target_sigsp(get_sp_from_cpustate(regs), ka); - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } return ((sp - frame_size) & -8UL); } @@ -318,12 +314,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->aregs[7]), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); err |= target_rt_setup_ucontext(&frame->uc, env); if (err) diff --git a/linux-user/microblaze/signal.c b/linux-user/microblaze/signal.c index 5572baa7dc..fada0f1495 100644 --- a/linux-user/microblaze/signal.c +++ b/linux-user/microblaze/signal.c @@ -133,9 +133,7 @@ static abi_ulong get_sigframe(struct target_sigaction *ka, { abi_ulong sp = env->regs[1]; - if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !on_sig_stack(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + sp = target_sigsp(sp, ka); return ((sp - frame_size) & -8UL); } diff --git a/linux-user/mips/signal.c b/linux-user/mips/signal.c index adeb5a4241..ed9849c7f6 100644 --- a/linux-user/mips/signal.c +++ b/linux-user/mips/signal.c @@ -179,20 +179,12 @@ get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size) { unsigned long sp; - /* Default to using normal stack */ - sp = regs->active_tc.gpr[29]; - /* * FPU emulator may have its own trampoline active just * above the user stack, 16-bytes before the next lowest * 16 byte boundary. Try to avoid trashing it. */ - sp -= 32; - - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + sp = target_sigsp(get_sp_from_cpustate(regs) - 32, ka); return (sp - frame_size) & ~7; } @@ -323,10 +315,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, __put_user(0, &frame->rs_uc.tuc_flags); __put_user(0, &frame->rs_uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp); - __put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->rs_uc.tuc_stack.ss_flags); + target_save_altstack(&frame->rs_uc.tuc_stack, env); setup_sigcontext(env, &frame->rs_uc.tuc_mcontext); diff --git a/linux-user/nios2/signal.c b/linux-user/nios2/signal.c index 816eed90f1..9a0b36e5ad 100644 --- a/linux-user/nios2/signal.c +++ b/linux-user/nios2/signal.c @@ -42,18 +42,6 @@ struct target_rt_sigframe { struct target_ucontext uc; }; -static unsigned long sigsp(unsigned long sp, struct target_sigaction *ka) -{ - if (unlikely((ka->sa_flags & SA_ONSTACK)) && !sas_ss_flags(sp)) { -#ifdef CONFIG_STACK_GROWSUP - return target_sigaltstack_used.ss_sp; -#else - return target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; -#endif - } - return sp; -} - static int rt_setup_ucontext(struct target_ucontext *uc, CPUNios2State *env) { unsigned long *gregs = uc->tuc_mcontext.gregs; @@ -158,11 +146,8 @@ static void *get_sigframe(struct target_sigaction *ka, CPUNios2State *env, { unsigned long usp; - /* Default to using normal stack. */ - usp = env->regs[R_SP]; - /* This is the X/Open sanctioned signal stack switching. */ - usp = sigsp(usp, ka); + usp = target_sigsp(get_sp_from_cpustate(env), ka); /* Verify, is it 32 or 64 bit aligned */ return (void *)((usp - frame_size) & -8UL); @@ -185,9 +170,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Create the ucontext. */ __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->regs[R_SP]), &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); err |= rt_setup_ucontext(&frame->uc, env); for (i = 0; i < TARGET_NSIG_WORDS; i++) { __put_user((abi_ulong)set->sig[i], diff --git a/linux-user/openrisc/signal.c b/linux-user/openrisc/signal.c index 0276808b59..ecf2897ccd 100644 --- a/linux-user/openrisc/signal.c +++ b/linux-user/openrisc/signal.c @@ -124,14 +124,11 @@ static inline abi_ulong get_sigframe(struct target_sigaction *ka, CPUOpenRISCState *regs, size_t frame_size) { - unsigned long sp = cpu_get_gpr(regs, 1); + unsigned long sp = get_sp_from_cpustate(regs); int onsigstack = on_sig_stack(sp); /* redzone */ - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + sp = target_sigsp(sp, ka); sp = align_sigframe(sp - frame_size); @@ -175,12 +172,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /*err |= __clear_user(&frame->uc, offsetof(ucontext_t, uc_mcontext));*/ __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(cpu_get_gpr(env, 1)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); setup_sigcontext(&frame->sc, env, set->sig[0]); /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/ diff --git a/linux-user/ppc/signal.c b/linux-user/ppc/signal.c index 15148d54a9..cacc9afb5a 100644 --- a/linux-user/ppc/signal.c +++ b/linux-user/ppc/signal.c @@ -217,13 +217,7 @@ static target_ulong get_sigframe(struct target_sigaction *ka, { target_ulong oldsp; - oldsp = env->gpr[1]; - - if ((ka->sa_flags & TARGET_SA_ONSTACK) && - (sas_ss_flags(oldsp) == 0)) { - oldsp = (target_sigaltstack_used.ss_sp - + target_sigaltstack_used.ss_size); - } + oldsp = target_sigsp(get_sp_from_cpustate(env), ka); return (oldsp - frame_size) & ~0xFUL; } @@ -515,12 +509,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, __put_user(0, &rt_sf->uc.tuc_flags); __put_user(0, &rt_sf->uc.tuc_link); - __put_user((target_ulong)target_sigaltstack_used.ss_sp, - &rt_sf->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->gpr[1]), - &rt_sf->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &rt_sf->uc.tuc_stack.ss_size); + target_save_altstack(&rt_sf->uc.tuc_stack, env); #if !defined(TARGET_PPC64) __put_user(h2g (&rt_sf->uc.tuc_mcontext), &rt_sf->uc.tuc_regs); diff --git a/linux-user/qemu.h b/linux-user/qemu.h index 192a0d2fef..c55c8e294b 100644 --- a/linux-user/qemu.h +++ b/linux-user/qemu.h @@ -51,13 +51,15 @@ struct image_info { abi_ulong file_string; uint32_t elf_flags; int personality; -#ifdef CONFIG_USE_FDPIC + + /* The fields below are used in FDPIC mode. */ abi_ulong loadmap_addr; uint16_t nsegs; void *loadsegs; abi_ulong pt_dynamic_addr; + abi_ulong interpreter_loadmap_addr; + abi_ulong interpreter_pt_dynamic_addr; struct image_info *other_info; -#endif }; #ifdef TARGET_I386 @@ -183,6 +185,13 @@ int loader_exec(int fdexec, const char *filename, char **argv, char **envp, struct target_pt_regs * regs, struct image_info *infop, struct linux_binprm *); +/* Returns true if the image uses the FDPIC ABI. If this is the case, + * we have to provide some information (loadmap, pt_dynamic_info) such + * that the program can be relocated adequately. This is also useful + * when handling signals. + */ +int info_is_fdpic(struct image_info *info); + uint32_t get_elf_eflags(int fd); int load_elf_binary(struct linux_binprm *bprm, struct image_info *info); int load_flt_binary(struct linux_binprm *bprm, struct image_info *info); diff --git a/linux-user/riscv/signal.c b/linux-user/riscv/signal.c index 718f3a5679..ef599e319a 100644 --- a/linux-user/riscv/signal.c +++ b/linux-user/riscv/signal.c @@ -54,24 +54,20 @@ struct target_rt_sigframe { static abi_ulong get_sigframe(struct target_sigaction *ka, CPURISCVState *regs, size_t framesize) { - abi_ulong sp = regs->gpr[xSP]; - int onsigstack = on_sig_stack(sp); - - /* redzone */ - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - sp -= framesize; - sp &= ~3UL; /* align sp on 4-byte boundary */ + abi_ulong sp = get_sp_from_cpustate(regs); /* If we are on the alternate signal stack and would overflow it, don't. Return an always-bogus address instead so we will die with SIGSEGV. */ - if (onsigstack && !likely(on_sig_stack(sp))) { + if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) { return -1L; } + /* This is the X/Open sanctioned signal stack switching. */ + sp = target_sigsp(sp, ka) - framesize; + + /* XXX: kernel aligns with 0xf ? */ + sp &= ~3UL; /* align sp on 4-byte boundary */ + return sp; } @@ -95,16 +91,10 @@ static void setup_sigcontext(struct target_sigcontext *sc, CPURISCVState *env) static void setup_ucontext(struct target_ucontext *uc, CPURISCVState *env, target_sigset_t *set) { - abi_ulong ss_sp = (target_ulong)target_sigaltstack_used.ss_sp; - abi_ulong ss_flags = sas_ss_flags(env->gpr[xSP]); - abi_ulong ss_size = target_sigaltstack_used.ss_size; - __put_user(0, &(uc->uc_flags)); __put_user(0, &(uc->uc_link)); - __put_user(ss_sp, &(uc->uc_stack.ss_sp)); - __put_user(ss_flags, &(uc->uc_stack.ss_flags)); - __put_user(ss_size, &(uc->uc_stack.ss_size)); + target_save_altstack(&uc->uc_stack, env); int i; for (i = 0; i < TARGET_NSIG_WORDS; i++) { diff --git a/linux-user/s390x/signal.c b/linux-user/s390x/signal.c index a204a85e4a..e35cbe6870 100644 --- a/linux-user/s390x/signal.c +++ b/linux-user/s390x/signal.c @@ -86,14 +86,11 @@ get_sigframe(struct target_sigaction *ka, CPUS390XState *env, size_t frame_size) abi_ulong sp; /* Default to using normal stack */ - sp = env->regs[15]; + sp = get_sp_from_cpustate(env); /* This is the X/Open sanctioned signal stack switching. */ if (ka->sa_flags & TARGET_SA_ONSTACK) { - if (!sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + - target_sigaltstack_used.ss_size; - } + sp = target_sigsp(sp, ka); } /* This is the legacy signal stack switching. */ @@ -205,10 +202,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Create the ucontext. */ __put_user(0, &frame->uc.tuc_flags); __put_user((abi_ulong)0, (abi_ulong *)&frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(get_sp_from_cpustate(env)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); save_sigregs(env, &frame->uc.tuc_mcontext); for (i = 0; i < TARGET_NSIG_WORDS; i++) { __put_user((abi_ulong)set->sig[i], diff --git a/linux-user/sh4/signal.c b/linux-user/sh4/signal.c index 5ce182aff7..2a5378e16e 100644 --- a/linux-user/sh4/signal.c +++ b/linux-user/sh4/signal.c @@ -78,9 +78,7 @@ struct target_rt_sigframe static abi_ulong get_sigframe(struct target_sigaction *ka, unsigned long sp, size_t frame_size) { - if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags(sp) == 0)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } + sp = target_sigsp(sp, ka); return (sp - frame_size) & -8ul; } @@ -238,12 +236,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Create the ucontext. */ __put_user(0, &frame->uc.tuc_flags); __put_user(0, (unsigned long *)&frame->uc.tuc_link); - __put_user((unsigned long)target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(regs->gregs[15]), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, regs); setup_sigcontext(&frame->uc.tuc_mcontext, regs, set->sig[0]); for(i = 0; i < TARGET_NSIG_WORDS; i++) { diff --git a/linux-user/signal-common.h b/linux-user/signal-common.h index fbb8d4365c..51030a9306 100644 --- a/linux-user/signal-common.h +++ b/linux-user/signal-common.h @@ -21,17 +21,10 @@ #define SIGNAL_COMMON_H extern struct target_sigaltstack target_sigaltstack_used; -static inline int on_sig_stack(unsigned long sp) -{ - return (sp - target_sigaltstack_used.ss_sp - < target_sigaltstack_used.ss_size); -} - -static inline int sas_ss_flags(unsigned long sp) -{ - return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE - : on_sig_stack(sp) ? SS_ONSTACK : 0); -} +int on_sig_stack(unsigned long sp); +int sas_ss_flags(unsigned long sp); +abi_ulong target_sigsp(abi_ulong sp, struct target_sigaction *ka); +void target_save_altstack(target_stack_t *uss, CPUArchState *env); static inline void target_sigemptyset(target_sigset_t *set) { diff --git a/linux-user/signal.c b/linux-user/signal.c index a3022c2f04..01de433e3a 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -249,6 +249,38 @@ void set_sigmask(const sigset_t *set) } #endif +/* sigaltstack management */ + +int on_sig_stack(unsigned long sp) +{ + return (sp - target_sigaltstack_used.ss_sp + < target_sigaltstack_used.ss_size); +} + +int sas_ss_flags(unsigned long sp) +{ + return (target_sigaltstack_used.ss_size == 0 ? SS_DISABLE + : on_sig_stack(sp) ? SS_ONSTACK : 0); +} + +abi_ulong target_sigsp(abi_ulong sp, struct target_sigaction *ka) +{ + /* + * This is the X/Open sanctioned signal stack switching. + */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) { + return target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + return sp; +} + +void target_save_altstack(target_stack_t *uss, CPUArchState *env) +{ + __put_user(target_sigaltstack_used.ss_sp, &uss->ss_sp); + __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &uss->ss_flags); + __put_user(target_sigaltstack_used.ss_size, &uss->ss_size); +} + /* siginfo conversion */ static inline void host_to_target_siginfo_noswap(target_siginfo_t *tinfo, diff --git a/linux-user/sparc/signal.c b/linux-user/sparc/signal.c index c823e61cee..45e922f328 100644 --- a/linux-user/sparc/signal.c +++ b/linux-user/sparc/signal.c @@ -123,18 +123,28 @@ static inline abi_ulong get_sigframe(struct target_sigaction *sa, CPUSPARCState *env, unsigned long framesize) { - abi_ulong sp; + abi_ulong sp = get_sp_from_cpustate(env); - sp = env->regwptr[UREG_FP]; + /* + * If we are on the alternate signal stack and would overflow it, don't. + * Return an always-bogus address instead so we will die with SIGSEGV. + */ + if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) { + return -1; + } /* This is the X/Open sanctioned signal stack switching. */ - if (sa->sa_flags & TARGET_SA_ONSTACK) { - if (!on_sig_stack(sp) - && !((target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size) & 7)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - } - return sp - framesize; + sp = target_sigsp(sp, sa) - framesize; + + /* Always align the stack frame. This handles two cases. First, + * sigaltstack need not be mindful of platform specific stack + * alignment. Second, if we took this signal because the stack + * is not aligned properly, we'd like to take the signal cleanly + * and report that. + */ + sp &= ~15UL; + + return sp; } static int diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 404be44ad5..e4825747f9 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -6600,10 +6600,10 @@ typedef abi_long from_flock64_fn(struct flock64 *fl, abi_ulong target_addr); typedef abi_long to_flock64_fn(abi_ulong target_addr, const struct flock64 *fl); #if defined(TARGET_ARM) && TARGET_ABI_BITS == 32 -static inline abi_long copy_from_user_eabi_flock64(struct flock64 *fl, +static inline abi_long copy_from_user_oabi_flock64(struct flock64 *fl, abi_ulong target_flock_addr) { - struct target_eabi_flock64 *target_fl; + struct target_oabi_flock64 *target_fl; short l_type; if (!lock_user_struct(VERIFY_READ, target_fl, target_flock_addr, 1)) { @@ -6620,10 +6620,10 @@ static inline abi_long copy_from_user_eabi_flock64(struct flock64 *fl, return 0; } -static inline abi_long copy_to_user_eabi_flock64(abi_ulong target_flock_addr, +static inline abi_long copy_to_user_oabi_flock64(abi_ulong target_flock_addr, const struct flock64 *fl) { - struct target_eabi_flock64 *target_fl; + struct target_oabi_flock64 *target_fl; short l_type; if (!lock_user_struct(VERIFY_WRITE, target_fl, target_flock_addr, 0)) { @@ -11629,9 +11629,9 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, to_flock64_fn *copyto = copy_to_user_flock64; #ifdef TARGET_ARM - if (((CPUARMState *)cpu_env)->eabi) { - copyfrom = copy_from_user_eabi_flock64; - copyto = copy_to_user_eabi_flock64; + if (!((CPUARMState *)cpu_env)->eabi) { + copyfrom = copy_from_user_oabi_flock64; + copyto = copy_to_user_oabi_flock64; } #endif diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h index 23f5bccf0e..361bb83a29 100644 --- a/linux-user/syscall_defs.h +++ b/linux-user/syscall_defs.h @@ -2649,29 +2649,12 @@ struct target_flock { }; struct target_flock64 { - short l_type; - short l_whence; -#if defined(TARGET_PPC) || defined(TARGET_X86_64) || defined(TARGET_MIPS) \ - || defined(TARGET_SPARC) || defined(TARGET_HPPA) \ - || defined(TARGET_MICROBLAZE) || defined(TARGET_TILEGX) \ - || defined(TARGET_XTENSA) - int __pad; -#endif - abi_llong l_start; - abi_llong l_len; - int l_pid; -} QEMU_PACKED; - -#ifdef TARGET_ARM -struct target_eabi_flock64 { - short l_type; - short l_whence; - int __pad; + abi_short l_type; + abi_short l_whence; abi_llong l_start; abi_llong l_len; - int l_pid; -} QEMU_PACKED; -#endif + abi_int l_pid; +}; struct target_f_owner_ex { int type; /* Owner type of ID. */ diff --git a/linux-user/tilegx/signal.c b/linux-user/tilegx/signal.c index 8f54f54f95..d0ed3de569 100644 --- a/linux-user/tilegx/signal.c +++ b/linux-user/tilegx/signal.c @@ -86,17 +86,13 @@ static void restore_sigcontext(CPUTLGState *env, struct target_sigcontext *sc) static abi_ulong get_sigframe(struct target_sigaction *ka, CPUArchState *env, size_t frame_size) { - unsigned long sp = env->regs[TILEGX_R_SP]; + unsigned long sp = get_sp_from_cpustate(env); if (on_sig_stack(sp) && !likely(on_sig_stack(sp - frame_size))) { return -1UL; } - if ((ka->sa_flags & SA_ONSTACK) && !sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - sp -= frame_size; + sp = target_sigsp(sp, ka) - frame_size; sp &= -16UL; return sp; } @@ -127,10 +123,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, /* Create the ucontext. */ __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->regs[TILEGX_R_SP]), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); setup_sigcontext(&frame->uc.tuc_mcontext, env, info->si_signo); if (ka->sa_flags & TARGET_SA_RESTORER) { diff --git a/linux-user/xtensa/signal.c b/linux-user/xtensa/signal.c index 1e98910c1b..3e483efc61 100644 --- a/linux-user/xtensa/signal.c +++ b/linux-user/xtensa/signal.c @@ -55,12 +55,10 @@ static abi_ulong get_sigframe(struct target_sigaction *sa, CPUXtensaState *env, unsigned long framesize) { - abi_ulong sp = env->regs[1]; + abi_ulong sp; + + sp = target_sigsp(get_sp_from_cpustate(env), sa); - /* This is the X/Open sanctioned signal stack switching. */ - if ((sa->sa_flags & TARGET_SA_ONSTACK) != 0 && !sas_ss_flags(sp)) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } return (sp - framesize) & -16; } @@ -152,12 +150,7 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, __put_user(0, &frame->uc.tuc_flags); __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(env->regs[1]), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); + target_save_altstack(&frame->uc.tuc_stack, env); if (!setup_sigcontext(frame, env)) { unlock_user_struct(frame, frame_addr, 0); goto give_sigsegv; |